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Product Detailed Parameters
- Description：IC OPAMP DIFF 1 CIRCUIT 8SOIC
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Amplifier Type：Differential
- Number of Circuits：1
- Output Type：-
- Slew Rate：5V/µs
- Gain Bandwidth Product：-
- Current - Input Bias：-
- Voltage - Input Offset：350 µV
- Current - Supply：810µA
- Current - Output / Channel：25 mA
- Voltage - Supply Span (Min)：4 V
- Voltage - Supply Span (Max)：36 V
- Operating Temperature：-55°C ~ 125°C
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- -3db Bandwidth：500 kHz
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Overview
The INA149AMDREP is a high common-mode voltage differential amplifier manufactured by Texas Instruments. It features a gain bandwidth product of 500 kHz and a slew rate of 5 V/us. The device operates with a supply voltage range of 4 V to 36 V and draws an operating current of 810 uA. Key electrical specifications include a common-mode rejection ratio (CMRR) of 90 dB, an input offset voltage (Vos) of 350 uV, and an output current capability of 25 mA per channel. It supports a maximum common-mode voltage of -275 V and functions within a temperature range of -40 C to +125 C.
Feature Summary
- Provides precise measurement of small differential voltages in the presence of high common-mode signals up to ±275 V.
- Integrates a high-precision operational amplifier with an integrated thin-film resistor network for accurate unit-gain performance.
- Includes protection against instantaneous common-mode transients and differential overloads up to 500 V.
Applications
- High-side current sensing in industrial systems
- Motor control applications requiring isolation from high common-mode voltages
- Data acquisition systems involving high-voltage signal conditioning
Procurement Notes
Verify the specific suffix 'AMDREP' indicates military-grade or enhanced reliability variants compared to standard commercial versions. Confirm RoHS compliance status through official datasheets as packaging details may vary. Ensure the SOIC-8 package dimensions match your PCB footprint requirements before finalizing procurement orders.
Selection Notes
Select this component when high common-mode voltage rejection is critical and traditional isolation amplifiers are insufficient. The 500 kHz bandwidth suits moderate-speed applications. Consider the 350 uV input offset voltage for precision requirements. The single-channel configuration fits compact designs where multiple amplifiers are not needed simultaneously.
Part Context
This part belongs to the INA149 series of high common-mode voltage differential amplifiers. It serves as a robust alternative to discrete solutions or optocoupler-based isolators. The device simplifies circuit design by integrating precision resistors, reducing external component count while maintaining high accuracy in harsh electrical environments.
Replacement Considerations
Direct substitutes include the standard INA149IDR or INA149AID for commercial grade applications. For enhanced reliability variants, check availability of INA149EVM evaluation modules or other REEL-packaged versions within the same family line.
