INA101AM - Very High Accuracy Instrumentation Amplifier | Texas Instruments
MPN: INA101AM ✓ Hoạt độngINA101AM Tóm tắt
An instrumentation amplifier is a specialized differential amplifier optimized for measuring small differential signals that are superimposed on a much larger common-mode voltage. Its internal resistor network and matched amplifiers provide predictable gain, high input impedance, and accurate rejection of common-mode interference. This makes the INA101AM suitable for sensor interfaces, strain gauges, thermocouples, RTDs, bridge transducers, and general instrumentation systems where signal integrity and measurement stability are important.
The INA101AM datasheet highlights very low drift of 0.25 mV/°C maximum, low offset voltage of 25 mV maximum as identified in the verified distributor result, low nonlinearity of 0.002%, low noise of 13 nV/√Hz, and high common-mode rejection of 106 dB at 60 Hz. The available technical reference also describes a bandwidth of approximately 300 kHz and a high input impedance of 10 GΩ. These specifications support precision amplification of low-level sensor signals while preserving fast transient response.
The monolithic three-op-amp architecture and laser-trimmed resistors reduce component count and simplify instrumentation-amplifier implementation. The INA101AM is intended for applications requiring accurate differential measurement, including industrial process control, test and measurement equipment, medical instrumentation, load-cell interfaces, and remote sensor acquisition. The TO-100-10 mechanical package supports through-hole assembly and provides a practical option for legacy and industrial equipment designs.
A key design consideration is ensuring that input common-mode voltage and supply voltage remain within the datasheet limits. The gain-setting resistor and external input and feedback components should be selected with suitable tolerance and stability. Input filtering, guarding, grounding, and keeping sensor wiring away from high-current conductors can further improve repeatability and rejection of unwanted interference.
This product page consolidates the verified Texas Instruments, DigiKey, Mouser, and distributor information with practical application guidance, package details, and engineering-oriented selection information for engineers evaluating the INA101AM.
Bộ thay thế dễ dàng lắp đặt cho INA101AM — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với INA101AM (cùng hình factor và footprint) — khác nhau ở Package, Mounting Type, Bandwidth, Input Impedance, Architecture.
INA101AG
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →INA101SM
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →INA101KU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →INA101P
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
INA101U
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
INA101AM Tỷ lệ tối đa & tính chất điện
| Product Type | Instrumentation Amplifier |
| Number of Channels | 1 channel |
| Architecture | Three precision operational amplifiers with laser-trimmed metal-film resistors |
| Input Type | Differential |
| Maximum Supply Voltage | ±20 V |
| Offset Voltage | 25 mV maximum |
| Input Drift | 0.25 mV/°C maximum |
| Nonlinearity | 0.002% |
| Độ dày tiếng ồn | 13 nV/√Hz |
| Common-Mode Rejection Ratio | 106 dB at 60 Hz |
| Input Impedance | 10 GΩ |
| Bandwidth | Approximately 300 kHz |
| Hộp | TO-100-10 |
| Kiểu lắp đặt | Through-hole |
| Application Areas | Strain gauges, thermocouples, RTDs, remote sensors, and general-purpose data acquisition |
Hướng dẫn cấu hình chân INA101AM to-100-10
Cấu hình chân cho INA101AM (to-100-10 gói). Thành phần số hiệu này có chân đầu vào, đầu ra và nguồn cung cấp. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết cấu hình chân bù, bù trừ và chân kích hoạt. Hoàn hảo cho điều kiện tín hiệu và mạch khuếch đại.
Không có dữ liệu chân cụ thể sẵn có cho INA101AM.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
INA101AM phù hợp cho 6 Áp dụngs: Strain-Gauge Bridge Measurement, Thermocouple Signal Conditioning, RTD Temperature Measurement, Precision Data Acquisition, Medical and Diagnostic Instrumentation, Load-Cell and Force Measurement.
Strain-Gauge Bridge Measurement
The INA101AM fits strain-gauge front ends because its differential instrumentation-amplifier architecture rejects common-mode bridge excitation while presenting a verified 10 GΩ input impedance. Its 106 dB CMRR at 60 Hz and 13 nV/√Hz noise density help preserve the small millivolt-level changes produced by a resistive bridge. Place the device close to the bridge, use symmetric routing, and confirm the applicable gain equation and supply limits in the manufacturer datasheet before finalizing the resistor values.
Được đề xuất
Thermocouple Signal Conditioning
INA101AM can condition the low-level differential output of a thermocouple while rejecting common-mode voltage present on industrial wiring. Its high input impedance limits sensor-loading error, and its verified 25 mV maximum offset and 0.25 mV/°C maximum drift are important considerations for temperature measurement. The circuit also needs cold-junction compensation, input protection, and carefully selected gain so that the usable thermocouple range is not saturated.
Được đề xuất
RTD Temperature Measurement
The INA101AM is suitable for resistive temperature detector bridges because differential measurement reduces sensitivity to supply and ground disturbances encountered along remote sensor wiring. Its verified 106 dB common-mode rejection at 60 Hz supports stable operation in electrically noisy environments, while the approximately 300 kHz bandwidth provides ample response for typical thermal systems. Use a precision excitation source and calculate lead-wire compensation and self-heating before applying the available gain.
Được đề xuất
Precision Data Acquisition
INA101AM provides a compact single-channel instrumentation front end for laboratory and industrial data-acquisition systems. Differential input handling, 10 GΩ input impedance, and 106 dB common-mode rejection are useful when the source is small and a substantial offset voltage exists between the two input nodes. The approximately 300 kHz bandwidth supports general-purpose acquisition rather than ultra-high-speed sensing, making system-level aliasing and reference accuracy central design considerations.
Được đề xuất
Medical and Diagnostic Instrumentation
The INA101AM can amplify small differential physiological or diagnostic sensor signals where high input impedance and common-mode rejection improve measurement integrity. Its verified 13 nV/√Hz noise density and 0.002% nonlinearity make it relevant to high-resolution front ends, although actual signal-chain suitability depends on the sensor bandwidth, electrode impedance, and safety isolation architecture. A medical design should separately validate patient protection, isolation, leakage current, and applicable regulatory requirements.
Được đề xuất
Load-Cell and Force Measurement
INA101AM is appropriate for load-cell bridges that generate small differential voltages under excitation. The high common-mode rejection reduces errors from supply variation and cable-coupled interference, while high input impedance avoids significant bridge-loading error. For practical force systems, verify excitation voltage, full-scale output, amplifier gain, and input common-mode range against the load-cell manufacturer's specifications. Keep high-current motor wiring separate from the bridge leads to prevent unwanted thermal offsets.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho INA101AM — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | INA101AG | INA101SM | INA101KU | INA101P | INA101U |
|---|---|---|---|---|---|---|
| Package | TO-100-10 | 14-pin ceramic DIP | SOIC-16 | SOIC-16 | DIP-14 | SOIC-16 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Type | Instrumentation Amplifier | Instrumentation Amplifier | Instrumentation Amplifier | Instrumentation Amplifier | Instrumentation Amplifier | Instrumentation Amplifier |
| Number of Channels | 1 channel | 1 channel | 1 channel | 1 channel | 1 channel | 1 channel |
Bảo phân biệt quan trọng
- Verified high common-mode rejection (vsINA101AG)
- High input impedance for low-level sensing (vsINA101SM)
- Low-noise instrumentation amplification (vsINA101KU)
Ghi chú thiết kế
Route the two differential inputs as a closely matched pair and keep them away from switching nodes, relay contacts, and high-current return paths. A grounded guard or shield can reduce capacitive pickup on long sensor cables. Check the complete Texas Instruments datasheet for the recommended input and gain-resistor layout before manufacturing, because the internal resistor network is sensitive to parasitic resistance and leakage.
Do not assume that a family member with the same INA101 designation is mechanically interchangeable. The verified INA101AM ordering uses TO-100-10, while INA101AG, INA101SM, INA101KU, INA101P, and INA101U use other package options identified in the comparison results. Confirm the physical dimensions, lead pitch, exposed connections, and complete electrical tables in each manufacturer datasheet before treating any candidate as a replacement.
Use clean, independently decoupled supply rails and follow the manufacturer's recommended bypass-capacitor arrangement. The INA101AM operates with bipolar supply voltages up to ±20 V according to the verified reference, but the usable input common-mode range must remain valid at the selected gain and supply voltage. Decoupling close to the device helps prevent supply ripple from converting into measurement error.
For sensor inputs below the millivolt range, input bias current, resistor leakage, thermoelectric effects, and connector contact resistance can be more important than the nominal 13 nV/√Hz noise density. Use low-leakage gain-setting resistors, stable low-noise references where applicable, and clean connector contacts. Evaluate drift and offset at the actual temperature range rather than relying only on the 25 mV and 0.25 mV/°C maximum ratings.
Thông tin tuân thủ
The supplied verified web data contains technical specifications, manufacturer links, and distributor listings but does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown rather than inferred.
