KTAx333系列 - 零漂移微功耗CMOS运算放大器
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🔍 产品概述
KTAx333系列是一款高性能零漂移微功耗CMOS运算放大器，采用先进的斩波稳定技术和自动校零技术。该系列产品具有极低的输入失调电压、超低功耗、轨到轨输入输出等特点，特别适用于精密测量、传感器信号调理、电池供电设备等应用。
核心特性
- 零漂移技术：采用斩波稳定和自动校零技术
- 微功耗设计：超低静态电流消耗
- 轨到轨输入输出：充分利用电源电压范围
- 高精度：极低输入失调电压和温漂
- 宽工作电压：单电源或双电源供电
- 高输入阻抗：CMOS输入级设计
- 低噪声：优异的噪声性能
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📄 KTAx333_DATASHEET_en.pdf
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KTAx333 Series
Zero-Drift, Micro-Power CMOS Operational Amplifiers
Technical Support sales.global@conntek.com.cn
2024- 8- 9
Disclaimer
The information in this document is provided by Quanzhou KTsense Microelectronics Co., Ltd. (泉州昆泰芯微电子科技有限公司) (hereafter referred to as ”KTsense Micro”) on an ”as is” basis for informational purposes only. KTsense Micro does not guarantee the accuracy of the information contained herein or the outcomes of its implementation. KTsense Micro assumes no liability for any errors or inaccuracies that may be present in this document. Users assume full responsibility for the application of the practices outlined in this document.
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For additional information, please contact our Direct Sales team and get help for your specific needs:
KTAx333 Series
| Region | Contact Information |
|---|---|
| Overseas | Email: sales.global@conntek.com.cn |
| China | Email: sales@conntek.com.cn |
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Table of Contents
1 Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Typical Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Pin Configuration and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1 KTA333 Pin Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.2 KTA2333 Pin Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.3 KTAx333 Series Part Name Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.1 Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5.2 ESD Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5.3 Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.1 Input Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6.2 Output Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 6.3 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 6.4 Frequency Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6.5 Noise Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6.6 Temperature Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7 Typical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
8 Application Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
8.1 Operating Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 8.2 Rail-to-Rail Input/Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 8.3 Input Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
8.4 Internal Offset Correction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8.5 Residual Ripple. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
9 Typical Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
9.1 Temperature Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
9.2 Thermistor Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
9.3 Low-Side Current Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 9.4 High-Side Current Monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 9.5 Instrumentation Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
10 Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
11 Package Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
11.1 SOT23-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
11.2 SC70-5 (SOT353) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
11.3 SOP-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
11.4 MSOP-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
11.5 DFN-2 × 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
KTAx333 Series
1 Key Features
• [Low offset voltage:] – [2] [ µV] [ (typical)] – [10] [ µV] [ (maximum)] • [Zero-drift:][ 0] [.] [05] [ µV] [ /] [◦] [C (maximum)] • [Micro-power:] – [17] [ µA] [ (single channel)] – [30] [ µA] [ (dual channel)] • [Rail-to-rail input/output] • [Wide supply voltage range:][ 1] [.] [8] [ V][ −] [5] [.] [5] [ V] • [Low][ 0] [.] [1][ Hz] [ −] [10][ Hz noise:][ 1] [.] [1] [ µV] • [Single-supply operation]
2 Typical Applications
• [Sensors] • [Temperature measurement] • [Electronic scales] • [Bridge circuit readout] • [Medical instruments]
3 Overview
The KTAx333 is a single-supply, low-power CMOS operational amplifier capable of rail-to-rail input and output. It employs self-calibration technology to achieve an extremely low offset voltage (2 µV, typical) with nearly zero drift over temperature and time. The amplifier offers high input impedance (common-mode range exceeding the supply rail voltage by 100 mV ) and can operate with a single supply from 1 . 8 V ( ± 0 . 9 V ) up to 5 . 5 V ( ± 2 . 75 V ), or with dual supplies.
The KTAx333 series delivers excellent common-mode rejection ratio (CMRR) performance without the crossover distortion associated with traditional complementary input stages. This design enables outstanding performance when driving analog-to-digital converters (ADCs) without sacrificing differential linearity.
The KTA333 (single-channel) is available in 5-pin SOT-23-5, SC70-5, and SOP-8 packages. The KTA2333 (dual-channel version) is available in SOP-8, MSOP-8, and DFN-2 × 2-8 packages.
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KTAx333 Series
4 Pin Configuration and Functions
4.1 KTA333 Pin Functions
Figure 1: KTAx333 Package and Pin Functions
| Pin Name | Pin of SOP | Pin of SOT | Pin of SC70 | I/O | Description |
|---|---|---|---|---|---|
| IN+ IN- NC OUT V+ V- | 3 2 1, 5, 8 6 7 4 | 3 4 — 1 5 2 | 1 3 — 4 5 2 | I I — O — — | Non-inverting input Inverting input No connection (can be left floating) Output Positive power supply Negative power supply |
Table 1: KTA333 Pin Configuration
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KTAx333 Series
4.2 KTA2333 Pin Functions
| Pin Name | Pin of DFN | Pin of SOP/MSOP | I/O | Description |
|---|---|---|---|---|
| INA+ INA- INB+ INB- OUTA OUTB V+ V- | 3 2 5 6 1 7 8 4 | 3 2 5 6 1 7 8 4 | I I I I O O — — | Non-inverting input, channel A Inverting input, channel A Non-inverting input, channel B Inverting input, channel B Output, channel A Output, channel B Positive power supply Negative power supply |
Table 2: KTA2333 Pin Configuration
4.3 KTAx333 Series Part Name Definition
Figure 2: KTAx333 Part Name Definition
5 Specifications
5.1 Absolute Maximum Ratings
| Parameter | Min | Max |
|---|---|---|
| Supply Voltage_ VCC_ Input Voltage_ VIN_ Junction Temperature_ TJ_ Storage Temperature_ TST G_ | 6_.5 V_ V −-0.2V _−_65 _◦_C | V ++0.2V 150 _◦_C 150 _◦_C |
Table 3: Absolute Maximum Ratings
Note: Exceeding the absolute maximum ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indi
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KTAx333 Series
cated in the operational sections of this specification is not implied. Prolonged operation at the maximum absolute rating conditions may affect device reliability.
5.2 ESD Ratings
| Parameter | Value |
|---|---|
| Human Body Model (HBM) | 7 kV |
Table 4: ESD Ratings
5.3 Recommended Operating Conditions
| Parameter | Min | Max |
|---|---|---|
| Supply Voltage_ VCC_ Operating Temperature Range_ TA_ | 1_.8 V_ _−_40 _◦_C | 5_.5 V_ 125 _◦_C |
Table 5: Recommended Operating Conditions
6 Electrical Characteristics
Conditions: @ T A =+25 [◦] C, V CM =Vs/2, VOUT=Vs/2, unless otherwise noted.
6.1 Input Characteristics
| Parameter Name | Description | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| VOS dVOS/dT IB IOS VCM CMRR AOL | Offset Voltage Offset Voltage Drift Input Bias Cur- rent Input Offset Current Common Mode Voltage Range Common Mode Rejection Ratio Open-Loop Voltage Gain | VS = 5_ V_ TA =_ −40◦C to 125◦C (V −) −0.1 V < VCM < (V +) + 0.1 V_,_ TA_ = −40◦C to 125◦C (V −) + 100_mV < VO < (V +) −100_mV,_ RL_ = 10_ k_Ω,_ TA_ =_ −40◦C to 125◦_C | (V −)_ −0._1 | 2 0.02 _±100 ±_120 120 120 | 10 0.05 (V +) + 0_._1 | µV µV /_◦_C pA pA V dB dB |
Table 6: Input Characteristics
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6.2 Output Characteristics
| Parameter Name | Description | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Output Swing relative to Power Rails | Output Swing relative to Power Rails | RL = 10 kΩ | 30 | 70 | mV | |
| ISC | Short-Circuit Current | _±_17 | mA |
Table 7: Output Characteristics
6.3 Power Supply
| Parameter Name | Description | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| VS IQ IQ PSRR | Supply Voltage Range Quiescent Current (Single) Quiescent Current (Dual) Power Supply Rejection Ratio | IO = 0_ A_,_ TA_ =_ −40◦C_ to 125_◦C_, signle amplier IO = 0_ A_,_ TA_ =_ −40◦C_ to 125_◦C_, dual ampliers VS = 1_.8 V_ to 5_.5 V_, TA =_ −40◦C_ to 125_◦C_ | 1.8 | 17 30 1 | 5.5 5 | V µA µA µV /V |
| Turn-on Time | Turn-on Time | VS = 5_V_ | 200 | µs |
Table 8: Power Supply Characteristics
6.4 Frequency Characteristics
| Parameter Name | Description | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| GBW SR | Gain Bandwidth Product Slew Rate | CL = 100_ pF_ G = 1 | 350 0.16 | kHz V /µs |
Table 9: Frequency Characteristics
6.5 Noise Characteristics
| Parameter Name | Description | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Input Noise | Input Noise | f = 0_._1 Hz to 10 Hz | 1.1 | µVP P |
Table 10: Noise Characteristics
6.6 Temperature Characteristics
| Parameter Name | Description | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| TA | Operating Temperature Range | -40 | 125 | _◦_C |
Table 11: Temperature Characteristics
7 Typical Characteristics
(@ T A = +25 [◦] C, V S = 5V, C L = 0pF, unless otherwise noted.)
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KTAx333 Series
Figure 3: Offset Voltage Distribution Figure 4: 0.1Hz to 10Hz Noise
Figure 5: Large Signal Step Response Figure 6: Small Signal Step Response
Figure 7: Negative Overvoltage Recovery Figure 8: Positive Overvoltage Recovery
Figure 9: Quiescent Current vs. Temperature
8 Application Guide
Figure 10: Output Voltage Swing vs. Output Current
The KTAx333 series operational amplifiers feature unity-gain stability and are suitable for a wide range of general-purpose applications. They offer very low offset voltage with minimal drift over time and temperature variations.
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KTAx333 Series
8.1 Operating Voltage
The KTAx333 series operational amplifiers can operate with a single supply voltage ranging from 1 . 8 V to 5 . 5 V, or a dual supply ranging from ± 0 . 9 V to ± 2 . 75 V . Operating beyond the absolute maximum voltage of 6 . 5 V can permanently damage the device. To achieve better performance, a 0.1 µ F bypass capacitor should be placed near the power supply pins.
8.2 Rail-to-Rail Input/Output
The KTAx333 series features rail-to-rail input and output capabilities, providing a wide input common-mode voltage range that exceeds the supply voltage by 100 mV . The output swing can achieve within 100 mV of the supply rails under a 10 k Ω load.
8.3 Input Protection
The KTAx333 series includes internal ESD protection diodes connected between the input pins and the supply rails, as shown in Figure 11. These diodes conduct when the input voltage exceeds either supply rail by 300 mV, providing over-voltage protection. However, if the current flowing through the diodes exceeds 10 mA, the device may be permanently damaged. To prevent this, an input resistor can be used, as shown in Figure 12.
Figure 11: Input ESD Protection Structure
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KTAx333 Series
Figure 12: Input Current Protection
8.4 Internal Offset Correction
The KTAx333 series operational amplifiers use a chopper stabilization technique combined with a continuous-time signal chain. This amplifier performs offset correction every 10 µs, and after power-on, it requires approximately 200 µs to reach the specified offset accuracy. The use of chopper stabilization also eliminates 1/f noise.
8.5 Residual Ripple
The KTAx333 series operational amplifiers use chopper-stabilization technology to eliminate offset voltage, while a notch filter is employed to suppress ripple caused by the chopper modulation. Although the ripple voltage is reduced, significant residual noise energy remains at the chopper frequency and its harmonics. To further attenuate noise at the chopper frequency, it is recommended to add a post-filter at the output of the operational amplifier.
9 Typical Applications
9.1 Temperature Measurement
Figure 13: Temperature Measurement Application
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KTAx333 Series
9.2 Thermistor Measurement
Figure 14: Thermistor Measurement Application
9.3 Low-Side Current Monitoring
Figure 15: Low-Side Current Monitoring
9.4 High-Side Current Monitoring
Figure 16: High-Side Current Monitoring
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9.5 Instrumentation Amplifier
Figure 17: Instrumentation Amplifier Application
10 Ordering Information
| Model | Package Type | Pin Count | Standard Package Quantity | Temperature Range |
|---|---|---|---|---|
| KTA333-ST5 KTA2333-MP8 KTA333-SF5* KTA333-SC5* KTA333-SP8* KTA2333-DZ8* KTA2333-SP8 | SOT23-5 MSOP-8 SOT353-5 SC70-5 SOP-8 DFN-2_×_2-8 SOP-8 | 5 8 5 5 8 8 8 | 3000 4000 — — — — 4000 | -40_◦Cto125◦C -40◦Cto125◦C -40◦Cto125◦C -40◦Cto125◦C -40◦Cto125◦C -40◦Cto125◦C -40◦Cto125◦_C |
Table 12: Ordering Information for KTAx333 Series
Note:Models marked with *are currently available only as sample quantities and not for mass production.
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KTAx333 Series
11 Package Dimensions
11.1 SOT23-5
| Symbol | Dimensions in Millimeters | Col3 | Dimensions in Inches | Col5 |
|---|---|---|---|---|
| Symbol | Min | Max | Min | Max |
| A A1 A2 b c D E E1 | 1.050 0.000 1.050 0.300 0.100 2.820 2.650 1.500 | 1.250 0.100 1.150 0.500 0.200 3.020 2.950 1.700 | 0.041 0.000 0.041 0.012 0.004 0.111 0.104 0.059 | 0.049 0.004 0.045 0.020 0.008 0.119 0.116 0.067 |
| e | 0.950(BSC) | 0.950(BSC) | 0.037(BSC) | 0.037(BSC) |
| e1 L θ | 1.800 0.300 0_◦_ | 2.000 0.600 8_◦_ | 0.071 0.012 0_◦_ | 0.079 0.024 8_◦_ |
Table 13: SOT23-5 Package Dimensions
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11.2 SC70-5 (SOT353)
| Symbol | Dimensions in Millimeters | Col3 | Dimensions in Inches | Col5 |
|---|---|---|---|---|
| Symbol | Min | Max | Min | Max |
| A A1 A2 b c D E E1 | 0.900 0.000 0.900 0.150 0.110 2.000 2.150 1.150 | 1.100 0.100 1.000 0.350 0.175 2.200 2.450 1.350 | 0.035 0.000 0.035 0.006 0.004 0.079 0.085 0.045 | 0.043 0.004 0.039 0.014 0.007 0.087 0.096 0.053 |
| e | 0.650(TYP) | 0.650(TYP) | 0.026(TYP) | 0.026(TYP) |
| e1 L L1 | 1.200 1.400 0.300 0.600 0.525(REF) | 1.200 1.400 0.300 0.600 0.525(REF) | 0.047 0.055 0.012 0.024 0.021(REF) | 0.047 0.055 0.012 0.024 0.021(REF) |
| θ | 0_◦_ | 8_◦_ | 0_◦_ | 8_◦_ |
Table 14: SC70-5 Package Dimensions
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11.3 SOP-8
| Symbol | Dimensions in Millimeters | Col3 | Dimensions in Inches | Col5 |
|---|---|---|---|---|
| Symbol | Min | Max | Min | Max |
| A A1 A2 b c D E E1 | 1.350 0.100 1.350 0.330 0.170 4.700 5.800 3.800 | 1.750 0.250 1.550 0.510 0.250 5.100 6.200 4.000 | 0.053 0.004 0.053 0.013 0.006 0.185 0.228 0.150 | 0.069 0.010 0.061 0.020 0.010 0.200 0.244 0.157 |
| e | 1.270(TYP) | 1.270(TYP) | 0.050(TYP) | 0.050(TYP) |
| L | 0.400 | 0.800 | 0.016 | 0.031 |
| θ | 0_◦_ | 8_◦_ | 0_◦_ | 8_◦_ |
Table 15: SOP-8 Package Dimensions
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11.4 MSOP-8
| Symbol | Dimensions in Millimeters | Col3 | Dimensions in Inches | Col5 |
|---|---|---|---|---|
| Symbol | Min | Max | Min | Max |
| A A1 A2 b c D E E1 | 0.820 0.020 0.750 0.250 0.090 2.900 4.750 2.900 | 1.100 0.150 0.950 0.380 0.230 3.100 5.050 3.100 | 0.032 0.001 0.030 0.010 0.004 0.114 0.187 0.114 | 0.043 0.006 0.037 0.015 0.009 0.122 0.199 0.122 |
| e | 0.650(TYP) | 0.650(TYP) | 0.026(TYP) | 0.026(TYP) |
| L | 0.400 | 0.800 | 0.016 | 0.031 |
| θ | 0_◦_ | 6_◦_ | 0_◦_ | 6_◦_ |
Table 16: MSOP-8 Package Dimensions
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KTAx333 Series
11.5 DFN-2 × 2-8
| Symbol | Dimensions in Millimeters | Col3 | Dimensions in Inches | Col5 |
|---|---|---|---|---|
| Symbol | Min | Max | Min | Max |
| A A1 A3 D E D1 E1 K | 0.700 0.800 0.000 0.050 0.203(REF) 1.900 2.100 1.900 2.100 0.500 0.700 1.100 1.300 0.350(REF) | 0.700 0.800 0.000 0.050 0.203(REF) 1.900 2.100 1.900 2.100 0.500 0.700 1.100 1.300 0.350(REF) | 0.028 0.031 0.000 0.002 0.008(REF) 0.075 0.083 0.075 0.083 0.020 0.028 0.043 0.051 0.014(REF) | 0.028 0.031 0.000 0.002 0.008(REF) 0.075 0.083 0.075 0.083 0.020 0.028 0.043 0.051 0.014(REF) |
| b e | 0.200 0.300 0.500(BSC) | 0.200 0.300 0.500(BSC) | 0.008 0.012 0.020(BSC) | 0.008 0.012 0.020(BSC) |
| L | 0.274 | 0.426 | 0.011 | 0.017 |
Table 17: DFN-2 × 2-8 Package Dimensions
19 of 19
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2μV(典型值)
10μV(最大值)
零漂移：0.05μV/℃(最大值)
微功耗
17μA(单通道)
- 30μA(双通道)
轨到轨输入/输出
宽电源电压范围：1.8V-5.5V
低0.1Hz-10Hz噪声：1.1μV
单电源供电
2 典型应用
传感器
温度检测
电子称
桥式电路读出
医疗仪表
KTAx333 系列
零漂移、微功耗、CMOS 运算放大器
3 概述
KTAx333是一款单电源供电，微功耗，可以实现轨到
轨输入/输出的CMOS运算放大器。其使用自校准技术
以提供极低的失调电压（2μV，典型值），同时随温度
和时间的漂移接近为零。放大器可以提供高输入阻抗
（共模范围超过电源轨电压100mV），可以使用1.8V
（±0.9V）和高达5.5V（±2.75V）的单电源或者双
电源。
KTAx333系列提供出色的CMRR性能，而不存在与传
统互补输入级关联的交叉。该设计可在驱动模数转换
器（ADC）的过程中实现优异的性能，而不会降低微
分线性。
KTA333（单通道）可提供5引脚SOT-23-5、SC70-5
以及SOP-8的封装。而KTA2333（双通道版本）可提
供SOP-8、MSOP-8以及DFN-2×2-8封装。
昆泰芯微电子科技有限公司 1 Rev 1.0
KTAx333 系列
零漂移、微功耗、CMOS 运算放大器
昆泰芯微电子科技有限公司 2 Rev 1.0
KTAx333 系列
零漂移、微功耗、CMOS 运算放大器
引脚功能： KTA333
| 引脚 | Col2 | Col3 | Col4 | I/O | 说明 |
|---|---|---|---|---|---|
| 名称 | SOP | SOT | SC70 | SC70 | SC70 |
| IN+ | 3 | 3 | 1 | I | 同相输入 |
| IN- | 2 | 4 | 3 | I | 反相输入 |
| NC | 1、5、8 | — | — | — | 无内部链（可以悬空） |
| OUT | 6 | 1 | 4 | O | 输出 |
| V+ | 7 | 5 | 5 | — | 正电源（最高） |
| V- | 4 | 2 | 2 | — | 负电源（最低） |
引脚功能： KTA2333
| 引脚 | Col2 | Col3 | I/O | 说明 |
|---|---|---|---|---|
| 名称 | DFN | SOP、MSOP-8 | SOP、MSOP-8 | SOP、MSOP-8 |
| INA+ | 3 | 3 | I | 同相输入，通道A |
| INA- | 2 | 2 | I | 反相输入，通道A |
| INB+ | 5 | 5 | I | 同相输入，通道B |
| INB- | 6 | 6 | I | 反相输入，通道B |
| OUTA | 1 | 1 | O | 输出，通道A |
| OUTB | 7 | 7 | O | 输出，通道B |
| V+ | 8 | 8 | — | 正电源（最高） |
| V- | 4 | 4 | — | 负电源（最低） |
产品型号构成
KTAX333-XXX
封装简称：ST5：SOT23-5
SF5：SOT353-5
SC5：SC70-5
SP8：SOP-8
MP8：MSOP-8
DZ8：DFN2020-8
通道数：空白：单通道
2：双通道
昆泰芯微电子科技有限公司 3 Rev 1.0
请参阅 [(1)]
KTAx333 系列
零漂移、微功耗、CMOS 运算放大器
| Col1 | 最小值 | 最大值 | 单位 |
|---|---|---|---|
| 电源电压 | 6.5 | V | |
| 模拟输入电压 | V- - 0.2 | V+ + 0.2 | V |
| 运行结温，TJ | 150 | ℃ | |
| 贮存温度，Tstg | -65 | 150 | ℃ |
(1) 超出绝对最大额定值下所列值的应力可能会对器件造成永久性损坏，这些仅为在应力额定值下的工作情
况，对于额定值下器件的功能性操作以及超出建议的工作条件下的任何其它操作，在此并未说明。长时间运行
在最大额定条件下会影响器件的可靠性。
5.2 ESD 额定值
| ESD | 值 | 单位 |
|---|---|---|
| HBM | 7K | V |
5.3 建议的工作条件
| Col1 | 最小值 | 最大值 | 单位 |
|---|---|---|---|
| 电源电压 | 1.8 | 5.5 | V |
| 额定温度范围 | -40 | 125 | ℃ |
昆泰芯微电子科技有限公司 4 Rev 1.0
KTAx333 系列
零漂移、微功耗、CMOS 运算放大器
6 电参数 (@TA=+25 ℃， V CM =Vs/2 ， VOUT=Vs/2 ，除特别说明外 )
| 项目 | 参数说明 | 工作条件 | 最小值 | 典型值 | 最大值 | 单位 |
|---|---|---|---|---|---|---|
| 输入特性 | 输入特性 | 输入特性 | 输入特性 | 输入特性 | 输入特性 | 输入特性 |
| VOS | 失调电压 | Vs=5V | 2 | 10 | μV | |
| dVOS/dT | 输入失调电压漂移 | TA= –40°C 至125°C | 0.02 | 0.05 | μV/℃ | |
| IB | 输入偏置电流 | ±100 | pA | |||
| IOS | 输入失调电流 | ±120 | pA | |||
| VCM | 输入共模电压范围 | (V–) – 0.1 | (V+) + 0.1 | V | ||
| CMRR | 共模抑制比 | (V–) – 0.1V < VCM < (V+) + 0.1V， TA = –40°C 至125°C | 120 | dB | ||
| AOL | 开环电压增益 | (V–) + 100mV < VO < (V+) – 100mV， RL = 10kΩ，TA = –40°C 至125°C | 120 | dB | ||
| 输出特性 | 输出特性 | 输出特性 | 输出特性 | 输出特性 | 输出特性 | 输出特性 |
| 相对于电源轨的输出摆幅 | 相对于电源轨的输出摆幅 | RL=10K | 30 | 70 | mV | |
| ISC | 短路电流 | ±17 | mA | |||
| 电源 | 电源 | 电源 | 电源 | 电源 | 电源 | 电源 |
| VS | 额定电压范围 | 1.8 | 5.5 | V | ||
| IQ | 静态功耗 | IO=0A，TA= –40°C 至125°C（单运放） | 17 | μA | ||
| IQ | 静态功耗 | IO=0A，TA= –40°C 至125°C（双运放） | 30 | μA | ||
| PSRR | 电源抑制比 | VS=1.8V 至5.5V，TA= –40°C 至125°C | 1 | 5 | μV/V | |
| 开通时间 | 开通时间 | VS=+5V | 200 | μs | ||
| 频率特性 | 频率特性 | 频率特性 | 频率特性 | 频率特性 | 频率特性 | 频率特性 |
| GBW | 增益带宽积 | CL=100pF | 350 | KHz | ||
| SR | 压摆率 | G=1 | 0.16 | V/μs | ||
| 噪声 | 噪声 | 噪声 | 噪声 | 噪声 | 噪声 | 噪声 |
| 输入噪声 | 输入噪声 | F=0.1Hz 至10Hz | 1.1 | μVPP | ||
| 温度 | 温度 | 温度 | 温度 | 温度 | 温度 | 温度 |
| TA | 额定温度范围 | -40 | 125 | ℃ |
昆泰芯微电子科技有限公司 5 Rev 1.0
KTAx333 系列
零漂移、微功耗、CMOS 运算放大器
7 典型特性 (@TA=+25 ℃， Vs=5V ， C L =0pF ，除特别说明外 )
图1.失调电压产生分布 图2.0.1Hz至10Hz噪声
图3.大信号阶跃响应 图4.小信号阶跃响应
图5.负过压恢复 图6.正过压恢复
昆泰芯微电子科技有限公司 6 Rev 1.0
KTAx333 系列
零漂移、微功耗、CMOS 运算放大器
图7.静态电流与温度的关系 图8.输出电压摆幅与输出电流的关系
昆泰芯微电子科技有限公司 7 Rev 1.0
KTAx333 系列
零漂移、微功耗、CMOS 运算放大器
KTAx333系列运算放大器具有单位增益稳定特性，且适用于各种通用应用。它可以提供非常低的失调电压并且随
时间推移和温度变化实现极低的温漂。
8.1 工作电压
KTAx333系列运算放大器可以使用 1.8V 到 5.5V 的单电源供电，也可以使用 ±0.9V 到 ±2.75V 的双电源供电。
高于 +6.5V（绝对最大值）的电源电压会对器件造成永久性损坏。为了获得更好的性能，在电源引脚附近应该
放置一个0.1μF的旁路电容。
8.2 轨到轨输入和输出
KTAx333系列运放具有轨到轨输入和轨到轨输出的特性。通过使用互补输入对结构可以获得很宽的输入共模电压
范围（超过电源轨100mV）。在10kΩ阻性负载条件下，输出电压摆幅可以达到小于电源轨100mV。
8.3 输入保护
KTAx333系列运算放大器输入端拥有两个内部ESD保护二极管，连接于电源轨和输入之间，如图9所示。当输入电
压高于任一电源轨300mV时，二极管正向导通泄放大电流以保护内部器件。通常，输入偏置电流约为100pA；但
是超过电源电压的输入电压可能导致过电流流入或流出输入引脚，如果电流超过10mA可能导致器件的永久损
坏。可通过输入电阻轻松实现此限制，如图10所示。
图9.输入ESD结构 图10.输入电流保护
8.4 内部偏移校正
KTAx333系列运算放大器使用斩波自校准技术与连续时间信号链结合使用，该放大器每10μs做一次失调校正。启
动后，放大器需要约200μs来实现额定Vos精度。斩波自校准技术的使用同时会消除闪烁噪声。
8.5 残余纹波
KTAx333系列运算放大器使用斩波自校准技术来消除运放的失调电压，同时使用陷波滤波器滤除由斩波调制引起
的纹波。尽管该纹波电压被抑制，但是斩波频率及其谐波分量上仍然存在比较大的残余噪声能量。为了更好地
滤除斩波频率处的噪声，推荐在运算放大器的输出端加一级后置滤波器。
昆泰芯微电子科技有限公司 8 Rev 1.0
9.1 温度测量
图11显示了温度测量应用。
9.2 热敏电阻测量
图12显示了热敏电阻测量应用。
KTAx333 系列
零漂移、微功耗、CMOS 运算放大器
图11.温度测量
图12.热敏电阻测量
昆泰芯微电子科技有限公司 9 Rev 1.0
图13显示了低侧电流监控应用。
9.4 高侧电流监控
图14显示了高侧电流监控应用。
KTAx333 系列
零漂移、微功耗、CMOS 运算放大器
图13.低侧电流监控
图14.高侧电流监控
昆泰芯微电子科技有限公司 10 Rev 1.0
图15显示了仪表放大器应用。
KTAx333 系列
零漂移、微功耗、CMOS 运算放大器
图15.仪表放大器
昆泰芯微电子科技有限公司 11 Rev 1.0
KTAx333 系列
零漂移、微功耗、CMOS 运算放大器
| 订货信息 | Col2 | Col3 | Col4 | Col5 |
|---|---|---|---|---|
| 型号 | 封装形式 | 引脚数 | 封装数量 | 温度 |
| KTA333-ST5 | SOT23-5 | 5 | 3000 | -40℃~125℃ |
| KTA2333-MP8 | MSOP-8 | 8 | 4000 | -40℃~125℃ |
| KTA333-SF5* | SOT353-5 | 5 | - | -40℃~125℃ |
| KTA333-SC5* | SC70-5 | 5 | - | -40℃~125℃ |
| KTA333-SP8* | SOP-8 | 8 | - | -40℃~125℃ |
| KTA2333-DZ8* | DFN2020-8 | 8 | - | -40℃~125℃ |
| KTA2333-SP8 | SOP-8 | 8 | 4000 | -40℃~125℃ |
*产品暂时只提供少量样品，不支持大规模供货。
昆泰芯微电子科技有限公司 12 Rev 1.0
KTAx333 系列
零漂移、微功耗、CMOS 运算放大器
| Symbol | Dimensions in Millimeters | Col3 | Dimensions in Inches | Col5 |
|---|---|---|---|---|
| Symbol | Min | Max | Min | Max |
| A | 1.050 | 1.250 | 0.041 | 0.049 |
| A1 | 0.000 | 0.100 | 0.000 | 0.004 |
| A2 | 1.050 | 1.150 | 0.041 | 0.045 |
| b | 0.300 | 0.500 | 0.012 | 0.020 |
| c | 0.100 | 0.200 | 0.004 | 0.008 |
| D | 2.820 | 3.020 | 0.111 | 0.119 |
| E | 2.650 | 2.950 | 0.104 | 0.116 |
| E1 | 1.500 | 1.700 | 0.059 | 0.067 |
| e | 0.950(BSC) | 0.950(BSC) | 0.037(BSC) | 0.037(BSC) |
| e1 | 1.800 | 2.000 | 0.071 | 0.079 |
| L | 0.300 | 0.600 | 0.012 | 0.024 |
| θ | 0° | 8° | 0° | 8° |
昆泰芯微电子科技有限公司 13 Rev 1.0
KTAx333 系列
零漂移、微功耗、CMOS 运算放大器
| Symbol | Dimensions in Millimeters | Col3 | Dimensions in Inches | Col5 |
|---|---|---|---|---|
| Symbol | Min | Max | Min | Max |
| A | 0.900 | 1.100 | 0.035 | 0.043 |
| A1 | 0.000 | 0.100 | 0.000 | 0.004 |
| A2 | 0.900 | 1.000 | 0.035 | 0.039 |
| b | 0.150 | 0.350 | 0.006 | 0.014 |
| c | 0.110 | 0.175 | 0.004 | 0.007 |
| D | 2.000 | 2.200 | 0.079 | 0.087 |
| E | 2.150 | 2.450 | 0.085 | 0.096 |
| E1 | 1.150 | 1.350 | 0.045 | 0.053 |
| e | 0.650 TYP. | 0.650 TYP. | 0.026 TYP. | 0.026 TYP. |
| e1 | 1.200 | 1.400 | 0.047 | 0.055 |
| L | 0.300 | 0.600 | 0.012 | 0.024 |
| L1 | 0.525 REF. | 0.525 REF. | 0.021 REF. | 0.021 REF. |
| θ | 0° | 8° | 0° | 8° |
昆泰芯微电子科技有限公司 14 Rev 1.0
KTAx333 系列
零漂移、微功耗、CMOS 运算放大器
| Symbol | Dimensions in Millimeters | Col3 | Dimensions in Inches | Col5 |
|---|---|---|---|---|
| Symbol | Min | Max | Min | Max |
| A | 1.350 | 1.750 | 0.053 | 0.069 |
| A1 | 0.100 | 0.250 | 0.004 | 0.010 |
| A2 | 1.350 | 1.550 | 0.053 | 0.061 |
| b | 0.330 | 0.510 | 0.013 | 0.020 |
| c | 0.170 | 0.250 | 0.006 | 0.010 |
| D | 4.700 | 5.100 | 0.185 | 0.200 |
| E | 5.800 | 6.200 | 0.228 | 0.244 |
| E1 | 3.800 | 4.000 | 0.150 | 0.157 |
| e | 1.270 TYP. | 1.270 TYP. | 0.050 TYP. | 0.050 TYP. |
| L | 0.400 | 0.800 | 0.016 | 0.031 |
| θ | 0° | 8° | 0° | 8° |
昆泰芯微电子科技有限公司 15 Rev 1.0
KTAx333 系列
零漂移、微功耗、CMOS 运算放大器
| Symbol | Dimensions in Millimeters | Col3 | Dimensions in Inches | Col5 |
|---|---|---|---|---|
| Symbol | Min | Max | Min | Max |
| A | 0.820 | 1.100 | 0.032 | 0.043 |
| A1 | 0.020 | 0.150 | 0.001 | 0.006 |
| A2 | 0.750 | 0.950 | 0.030 | 0.037 |
| b | 0.250 | 0.380 | 0.010 | 0.015 |
| c | 0.090 | 0.230 | 0.004 | 0.015 |
| D | 2.900 | 3.100 | 0.114 | 0.122 |
| E | 4.750 | 5.050 | 0.187 | 0.199 |
| E1 | 2.900 | 3.100 | 0.114 | 0.122 |
| e | 0.650 TYP. | 0.650 TYP. | 0.026 TYP. | 0.026 TYP. |
| L | 0.400 | 0.800 | 0.016 | 0.031 |
| θ | 0° | 6° | 0° | 6° |
昆泰芯微电子科技有限公司 16 Rev 1.0
KTAx333 系列
零漂移、微功耗、CMOS 运算放大器
| Symbol | Dimensions in Millimeters | Col3 | Dimensions in Inches | Col5 |
|---|---|---|---|---|
| Symbol | Min | Max | Min | Max |
| A | 0.700 | 0.800 | 0.028 | 0.031 |
| A1 | 0.000 | 0.050 | 0.000 | 0.002 |
| A3 | 0.203 REF. | 0.203 REF. | 0.008 REF. | 0.008 REF. |
| D | 1.900 | 2.100 | 0.075 | 0.083 |
| E | 1.900 | 2.100 | 0.075 | 0.083 |
| D1 | 0.500 | 0.700 | 0.020 | 0.028 |
| E1 | 1.100 | 1.300 | 0.043 | 0.051 |
| K | 0.350 REF. | 0.350 REF. | 0.014 REF. | 0.014 REF. |
| b | 0.200 | 0.300 | 0.008 | 0.012 |
| e | 0.500 BSC. | 0.500 BSC. | 0.020 BSC. | 0.020 BSC. |
| L | 0.274 | 0.426 | 0.011 | 0.017 |
昆泰芯微电子科技有限公司 17 Rev 1.0
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