INA117BM - Precision Difference Amplifier | Texas Instruments
MPN: INA117BM ✓ فعالINA117BM جائزہ
A difference amplifier is an analog signal-conditioning component that subtracts one input voltage from another and amplifies the resulting difference. The INA117 belongs to the instrumentation amplifier and differential amplifier family, where precision resistor matching helps maintain accurate gain and common-mode rejection. Its monolithic construction combines a precision operational amplifier with an integrated thin-film resistor network, simplifying circuit design compared with a discrete resistor network and separate op amp. The result is a fixed unity-gain device intended for applications requiring accurate differential measurement rather than adjustable gain.
Key characteristics of the INA117BM include low nonlinearity of 0.001% and a 200 kHz bandwidth for the specified CSO: SHE die. The wide common-mode input range allows the input terminals to operate near the supply-voltage envelope, which is useful when measuring small differential signals riding on a larger voltage. The device is offered in an 8-pin plastic mini-DIP and an 8-pin SO-8 surface-mount package in the INA117 family; INA117BM specifically uses the TO-99-8 package. The specified operating temperature range for the family is -40°C to 85°C.
Typical uses include high-side current sensing in motor-control and power-conversion systems, battery monitoring, precision bridge amplifiers, and industrial measurement front ends. The unity-gain architecture makes the part appropriate when the system requires a fixed differential gain of one and very high common-mode rejection. Applications should still verify the exact supply, common-mode, output-swing, and stability limits for the selected package and operating conditions before production release.
For PCB implementation in a through-hole TO-99-8 design, preserve adequate clearance around the metal package, route sensitive input traces away from switching nodes, and use a stable reference or low-impedance return for the signal source. Because the internal gain network is precision matched, careful grounding and connector placement are important for preserving the benefit of the common-mode rejection. This page provides technical guidance, application fit, and pin-compatible replacement information for engineers evaluating the INA117BM.
کے لیے ڈراپ اِن متبادل INA117BM — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں INA117BM (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Bandwidth, Gain, Mounting Type, Operating Temperature Range, Package.
INA117AM
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →INA117BM-BI
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
INA117P-BI
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
INA117BM زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Product Type | Precision unity-gain difference amplifier |
| Number of Circuits | 1 circuit |
| Gain | 1 unity gain |
| Bandwidth | 200 kHz for CSO: SHE |
| Maximum Bandwidth | 500 kHz for CSO: TID |
| Nonlinearity | 0.001% |
| آپریٹنگ درجہ حرارت رینج | -40°C to 85°C |
| پیکیج | 8-pin TO-99-8 metal package |
| ماؤنٹنگ ٹائپ | Through-hole |
| Die Manufacturing Process | CSO: SHE |
INA117BM 8-pin to-99-8 metal package پن کنفیگریشن گائیڈ
INA117BM (8-pin to-99-8 metal package پیکیج) کے لیے پن کنفیگریشن۔ اس اینالاگ کمپوننٹ میں اِن پٹ، آؤٹ پٹ اور پاور سپلائی پنز شامل ہیں۔ آفسیٹ نل، کمپنسیشن اور اِن ایبل پن کنفیگریشنز کے لیے مینوفیکچرر کے ڈیٹا شیٹ سے رجوع کریں۔ سگنل کنڈیشننگ اور ایمپلیفائر سرکٹس کے لیے مثالی۔
کے لیے تفصیلی پن آؤٹ ڈیٹا دستیاب نہیں INA117BM.
رجوع کریں ڈیٹا شیٹ مکمل پن کنفیگریشن کے لیے۔
عام استعمالات
INA117BM کے لیے موزوں ہے 6 ایپلیکیشنs: High-Side Current Sensing, Battery Monitoring, Industrial Bridge Measurement, Precision Buffering, Motor Control Feedback, Test and Measurement Front Ends.
High-Side Current Sensing
The INA117BM suits high-side current sensing when a small shunt voltage must be measured while the common-mode voltage is substantially higher than the signal. Its unity-gain difference-amplifier architecture is useful for preserving a 1:1 differential relationship, while the very high common-mode input range helps the amplifier operate near the supply envelope. Place the shunt inputs on short, symmetric traces and keep switching-node copper away from the input pair. Confirm the actual common-mode limits, output swing, and transient response against the Texas Instruments datasheet before using it in a motor or power-converter leg.
تجویز کردہ
Battery Monitoring
The INA117BM can monitor differential voltage across a battery sense resistor or divider when the common-mode voltage varies over a broad range. Its fixed unity gain makes it appropriate for measurements where the circuit later performs scaling and filtering. The integrated precision resistor network simplifies the differential front end and reduces dependence on external resistor matching. In a battery-management design, verify the maximum common-mode voltage, supply range, input polarity, and output headroom. Use Kelvin routing where practical to reduce voltage drops in the sense connections.
تجویز کردہ
Industrial Bridge Measurement
The INA117BM is appropriate for differential bridge outputs where the desired signal is small relative to a substantial common-mode voltage. Its 200 kHz bandwidth for the CSO: SHE implementation provides useful bandwidth for many slow-to-moderate industrial measurement paths, while 0.001% nonlinearity supports accurate signal reproduction. The device provides unity gain, so downstream circuitry must perform any required additional scaling. Ensure excitation and input common-mode voltages remain within the datasheet limits, and provide filtering appropriate for the sensor bandwidth rather than unnecessarily reducing the usable signal rate.
تجویز کردہ
Precision Buffering
The INA117BM can serve as a differential buffer in measurement systems that need to reject common-mode noise before a converter or control circuit. Its monolithic construction combines a precision op amp with an integrated thin-film resistor network, simplifying implementation compared with discrete matched resistors. The high common-mode capability makes it useful when the buffer input is not referenced to ground. Confirm the required output swing and drive capability at the selected supply voltage, and avoid excessive capacitive loading that could affect stability.
تجویز کردہ
Motor Control Feedback
The INA117BM can monitor motor-drive feedback or shunt current in systems where the sensed common-mode voltage rises and falls rapidly. Its high common-mode input range and differential rejection are useful for separating a small measurement signal from the motor-switching environment. Layout quality remains essential: use short differential traces, a solid ground reference, and isolation from gate-drive and power-switching copper. Validate bandwidth and recovery behavior against the fastest switching transient, and confirm that the output remains within the linear range at maximum motor current.
تجویز کردہ
Test and Measurement Front Ends
The INA117BM is useful in laboratory and industrial test front ends where a small differential input must be isolated from a larger common-mode voltage. The fixed unity gain provides a predictable signal path, while the 200 kHz CSO: SHE bandwidth accommodates many general-purpose measurement tasks. For instrument-grade accuracy, include offset, bias-current, and CMRR terms in the uncertainty budget. Use shielded input routing and controlled grounding to prevent leakage and connector noise from dominating the measurement, especially at long input-cable lengths.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا INA117BM — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | INA117AM | INA117BM-BI | INA117P-BI |
|---|---|---|---|---|
| Product Type | Precision unity-gain difference amplifier | Precision unity-gain difference amplifier | Precision unity-gain difference amplifier | Precision unity-gain difference amplifier |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | TO-99-8 | TO-99-8 - same | TO-99-8 - same | TO-99-8 - same |
| Number of Circuits | 1 circuit | 1 circuit | 1 circuit | 1 circuit |
| Gain | 1 unity gain | 1 unity gain | 1 unity gain | 1 unity gain |
| Mounting Type | Through-hole | Through-hole | Through-hole | Through-hole |
اہم امتیازی خصوصیات
- Unity-gain precision difference-amplifier architecture (بمقابلہINA117AM)
- High common-mode input voltage capability (بمقابلہINA117P-BI)
- 200 kHz CSO: SHE bandwidth (بمقابلہINA117BM-BI)
ڈیزائن نوٹس
Route the two INA117BM input connections as a tight differential pair from the source to the device. Keep the pair away from switching nodes, relay contacts, and high-current return paths. A common return conductor can help reject the unwanted voltage shared by both inputs; do not create a large copper loop between the input source and the amplifier ground.
Check the common-mode voltage at the pins, not only the differential voltage across them. The INA117BM can accept a very high common-mode input range, but the supply voltage, output swing, input polarity, and maximum input differential voltage still limit the operating region. Use the manufacturer ordering information to confirm the exact INA117BM suffix and its electrical limits before production.
For high-side sensing, connect the shunt and amplifier inputs with Kelvin routing so copper resistance does not add to the measured voltage. Keep the sense loop small and place any input protection close to the source. If the input cable is long, add protection and filtering that are stable with the INA117 frequency response rather than relying on excessive capacitance at the input.
Decouple the supply pins with local ceramic capacitance and provide a low-impedance return to the device. If the common-mode signal is referenced to a high-voltage rail, use the amplifier's supply arrangement and pin assignments exactly as shown in the manufacturer application guidance. Verify output headroom at the worst-case differential input because unity gain does not eliminate the normal output-swing limitation.
تعمیل کی معلومات
The INA117 product information confirms the package and operating temperature range but does not provide the extracted compliance classifications.
