INA163UA - Low-Noise Instrumentation Amplifier | Texas Instruments
料号： INA163UA ✓ 量产中INA163UA 概述
An instrumentation amplifier is a specialized analog amplifier that provides differential gain, high input impedance, and accurate common-mode rejection. The INA163UA combines these functions in a single IC, simplifying signal-chain design when a sensor or balanced source must be amplified before measurement, conversion, or audio processing. Its current-feedback approach differentiates it from voltage-feedback amplifiers and is particularly useful where bandwidth and dynamic response need to remain strong over multiple gain settings.
The principal benefit of the INA163UA is low-noise signal conditioning in demanding analog systems. Low noise preserves small-signal information and can improve the usable dynamic range of downstream converters, audio equipment, and laboratory instruments. Low distortion helps maintain signal integrity when the input contains high-quality content and the amplifier operates at practical signal levels. The device is also suitable for applications that require a compact solution rather than a discrete three-amplifier instrumentation-amplifier implementation.
Typical uses include balanced microphone preamplification, audio signal conditioning, industrial measurement systems, medical instrumentation, and low-level sensor interfaces. The 14-pin SOIC package supports conventional surface-mount assembly and provides a practical upgrade path when a design requires low noise and low distortion in a compact analog IC.
Designers should use the manufacturer datasheet for the complete electrical limits, gain configuration, pin assignments, recommended operating conditions, and application circuit. PCB layout should keep input and feedback connections short, maintain a clean ground reference, and place compensation or filtering components close to their associated pins. This page combines manufacturer information, distributor references, package details, practical design guidance, and drop-in alternative evaluation for faster component selection.
直接替换替代料： INA163UA ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： INA163UA （相同外形与封装尺寸） ——差异在于 Package, Input Offset Voltage, Product Type, Amplifier Type, Architecture.
INA163UA/2K5
✅ 直接替换📋 参考替代料（不在目录中）
INA163UA/2K5G4
✅ 直接替换📋 参考替代料（不在目录中）
INA163UAE4
✅ 直接替换📋 参考替代料（不在目录中）
INA163UA 最大额定值与电气特性
| Product Type | Low-noise, low-distortion instrumentation amplifier |
| Architecture | Monolithic current-feedback instrumentation amplifier |
| Number of Circuits | 1 circuit |
| 封装 | 14-pin SOIC |
| 安装类型 | Surface mount |
| Termination/Packing Code | UA package code |
INA163UA 14-pin soic 引脚配置指南
INA163UA（14-pin soic 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： INA163UA.
请参阅 数据手册 以查看完整引脚配置。
典型应用
INA163UA 适用于 6 应用s: Balanced Microphone Preamplifier, Audio Signal Conditioning, Industrial Sensor Interface, Medical Instrumentation, Precision Data Acquisition, Low-Level Bridge Measurement.
Balanced Microphone Preamplifier
The INA163UA fits balanced low-impedance microphone preamplification because Texas Instruments identifies low noise, low distortion, current-feedback circuitry, wide bandwidth, and excellent dynamic response as central characteristics. The instrumentation amplifier accepts the differential microphone signal while helping reject common-mode noise present on balanced lines. In a practical audio front end, it can sit between a microphone connector and an audio converter or line stage. The design should use the gain and feedback arrangement from the manufacturer datasheet, maintain a low-impedance ground reference, and verify output swing, bandwidth, and distortion against the microphone sensitivity and downstream headroom.
推荐
Audio Signal Conditioning
The INA163UA is appropriate for conditioning low-level balanced audio signals before conversion, mixing, or amplification. Its low-noise, low-distortion instrumentation-amplifier architecture helps retain small-signal detail while providing the differential gain and common-mode rejection expected in professional audio equipment. Current-feedback circuitry is valuable when the design needs broad bandwidth and strong dynamic response over multiple gain settings. Confirm the required gain against the source level, place any input or feedback filtering close to the relevant pins, and verify output-headroom limits for the chosen supply configuration.
推荐
Industrial Sensor Interface
The INA163UA can amplify differential sensor outputs when low noise and accurate signal representation are important. Instrumentation-amplifier behavior helps reject common-mode voltage that may exist on industrial wiring, while the low-noise design preserves weak sensor signals. A typical circuit places the sensor near the input stage, routes the differential pair away from switching nodes, and converts the conditioned output into a measurement or control system. Before selecting the device, confirm the sensor output range, required gain, input common-mode limits, supply voltage, bandwidth, and isolation or protection requirements.
推荐
Medical Instrumentation
The INA163UA's low-noise, low-distortion characteristics suit medical instrumentation that must preserve small differential signals. It can provide input amplification for suitable sensing elements while rejecting common-mode interference on connected leads. Medical use also depends on the complete system risk assessment, isolation architecture, patient protection, leakage requirements, and applicable regulatory validation; the amplifier qualification alone does not establish medical-system compliance. Use the manufacturer datasheet for operating limits and implement the recommended grounding, filtering, and protection methods for the specific sensing topology.
推荐
Precision Data Acquisition
The INA163UA can serve as the analog front end of a precision data-acquisition channel when the source is differential and the signal level is low. Its low-noise, low-distortion architecture supports accurate amplification before an ADC, while current-feedback behavior provides wide bandwidth and excellent dynamic response. The implementation should minimize trace length around the high-impedance input and sensitive feedback nodes, maintain a stable reference ground, and select gain without saturating the converter. Compare the amplifier's noise, distortion, common-mode range, and settling behavior with the ADC acquisition window and input bandwidth.
推荐
Low-Level Bridge Measurement
The INA163UA is suitable for front-end amplification of suitable resistive bridge outputs because differential instrumentation-amplifier operation helps reject common-mode excitation and supply-related noise. Low input noise is important when the bridge imbalance is small, while low distortion preserves linear scaling for downstream conversion. A complete design must include excitation, reference, lead compensation, input filtering, and output-scaling calculations. Confirm the bridge impedance, common-mode voltage, output range, gain, and frequency response in the datasheet, and account for cable noise with appropriate filtering without degrading the intended measurement bandwidth.
推荐
推荐产品汇总
工程参考数据： INA163UA ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | INA163UA/2K5 | INA163UA/2K5G4 | INA163UAE4 | INA166UA | INA155UA |
|---|---|---|---|---|---|---|
| Package | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Family | INA163 | INA163 | INA163 | INA163 | INA166 | INA155 |
| Amplifier Function | Instrumentation amplifier | Instrumentation amplifier | Instrumentation amplifier | Instrumentation amplifier | Instrumentation amplifier | Instrumentation amplifier |
关键差异点
- Direct same-family ordering alternatives preserve the INA163 function and footprint （对比 INA163UA/2K5)
- Current-feedback implementation supports wide bandwidth and dynamic response （对比 INA166UA)
- Low-noise and low-distortion architecture targets small-signal conditioning （对比 INA155UA)
设计说明
Keep the differential input and feedback paths short and symmetrical, and route them away from switching regulators, relays, and high-current traces. Current-feedback instrumentation amplifiers can be sensitive to parasitic capacitance around gain-setting and feedback nodes, so follow the exact component placement shown in the Texas Instruments datasheet. Maintain a low-impedance ground reference under the device and decouple supply pins close to the package with the capacitance and ESR guidance specified by the manufacturer.
Calculate the complete gain plan before placing input filtering. The usable bandwidth, settling behavior, and noise depend on the selected gain, feedback network, source impedance, and filter components. Balanced microphone and sensor cables should use a consistent reference ground and, where practical, twisted-pair routing. Validate common-mode range and output swing across the full signal range; a low-noise amplifier still fails to deliver accurate measurements if the operating point approaches a supply or input limit.
Do not treat an INA163-family suffix as a functional difference without checking the ordering information. INA163UA/2K5, INA163UA/2K5G4, and INA163UAE4 are the strongest same-family drop-in candidates, while INA166UA and INA155UA are different families whose noise, distortion, gain, bandwidth, and common-mode limits must be compared. Before replacing a part, verify the exact pin functions, package drawing, gain-setting method, supply range, temperature rating, and qualification requirements.
合规信息
The available INA166 comparison record references RoHS and REACH information for the compared products, but no explicit INA163UA compliance statement appears in the target part records. The /2K5G4 suffix is identified in the cross-reference record as a lead-free terminal-finish configuration, but broader INA163UA compliance claims are not made without explicit manufacturer documentation.