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Product Detailed Parameters
- Description：INA157 HIGH-SPEED, PRECISION DIF
- Series：*
- Mfr：Burr Brown
- Package：Bulk
- Amplifier Type：-
- Number of Circuits：-
- Output Type：-
- Slew Rate：-
- Gain Bandwidth Product：-
- Current - Input Bias：-
- Voltage - Input Offset：-
- Current - Supply：-
- Current - Output / Channel：-
- Voltage - Supply Span (Min)：-
- Voltage - Supply Span (Max)：-
- Operating Temperature：-
- Grade：-
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- Package / Case：-
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- -3db Bandwidth：-
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Overview
The INA157UA is a high-speed, precision difference amplifier manufactured by Texas Instruments. It features a gain bandwidth product of 4 MHz and a slew rate of 14 V/us. The device offers a common-mode rejection ratio (CMRR) of 80 dB and an input offset voltage of 100 uV. It operates on a single supply voltage ranging from 8 V to 36 V, with a typical operating current of 2.4 mA. The amplifier provides gains of 0.5 V/V or 2 V/V with a gain error of 0.05%. It is housed in an SOIC-8 package and functions within a temperature range of -40°C to +85°C.
Feature Summary
- High-speed operation with a 4 MHz gain-bandwidth product and 14 V/us slew rate for rapid signal processing.
- Precision performance characterized by low input offset voltage and minimal gain error for accurate differential measurements.
- Wide common-mode input range allowing operation with high common-mode voltages relative to the supply rails.
Applications
- High-speed data acquisition systems requiring precise differential signal conditioning.
- Medical instrumentation where high common-mode rejection and accuracy are critical.
- Industrial process control applications involving sensor signal amplification.
Procurement Notes
Verify the manufacturer designation as Texas Instruments, as the component originates from the Burr-Brown acquisition. Confirm the specific suffix 'UA' corresponds to the SOIC-8 surface-mount package variant. Ensure compatibility with the required gain setting (0.5 V/V or 2 V/V) for the target circuit design. Check for RoHS compliance status if environmental regulations apply to the final assembly.
Selection Notes
Select this component when both high speed and high precision are required simultaneously, which is uncommon in standard difference amplifiers. The fixed internal gain options limit flexibility but simplify external resistor networks. Consider the 80 dB CMRR against system noise requirements. The wide common-mode range simplifies biasing in single-supply environments compared to devices with limited input ranges.
Part Context
The INA157 belongs to the family of high-speed precision difference amplifiers originally developed by Burr-Brown before its integration into Texas Instruments. This series addresses the need for fast settling times without sacrificing DC accuracy. The UA suffix denotes the plastic small-outline integrated circuit package, distinguishing it from ceramic or other packaging variants within the same functional family.
Replacement Considerations
Public confirmed substitute part numbers include INA157U, INA157UA/2K5, INA157U-2K5, INA157UA-2K5, INA157U-2K5E4, INA157UA-2K5G4, INA157U/2K5E4, and INA157UA/2K5G4.
