OPA1637DGKR

Instrumentation, Op Amps, Buffer Amps Overview

The OPA1637DGKR is a high-fidelity, low-noise, fully-differential Burr-Brown audio operational amplifier manufactured by Texas Instruments. It features super-beta bipolar inputs for exceptional signal-to-noise ratio and spurious-free dynamic range. The device supports wide single-supply operation from 3 V to 36 V or dual supplies up to ±18 V. Key electrical parameters include a gain-bandwidth product of 9.2 MHz, a differential output slew rate of 15 V/µs, and an input voltage noise density of 3.7 nV/√Hz at 1 kHz. It offers a THD+N of –120 dB at 1 kHz and operates within a temperature range of –40°C to +125°C in an 8-pin VSSOP package.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Super-beta bipolar input technology provides very low input bias current and noise while maintaining excellent voltage noise performance.
• Fully differential architecture with configurable output common-mode voltage (VOCM) control for direct interfacing with ADCs and Class-D amplifiers.
• Integrated power-down feature reduces quiescent current to less than 20 µA for system power management.
• High-voltage capability allows operation with supply voltages up to ±18 V without additional clamping components.

Instrumentation, Op Amps, Buffer Amps Applications

• Professional audio mixers or control surfaces
• Professional microphones and wireless systems
• Data acquisition (DAQ) systems

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific ordering suffix 'DGKR' corresponds to the 8-pin VSSOP package and tape-and-reel quantity when sourcing. Confirm that the component meets RoHS compliance requirements for your assembly process. Ensure the design accounts for the specified thermal resistance values to maintain junction temperatures within the recommended operating limits during continuous use.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component for applications requiring low-noise differential signal processing with minimal power consumption. The wide supply voltage range accommodates both single-supply and dual-supply designs. Consider the 9.2 MHz gain-bandwidth product and 15 V/µs slew rate for high-fidelity audio bandwidths. Verify that the required output common-mode voltage aligns with the VOCM pin capabilities for your downstream interface.

Instrumentation, Op Amps, Buffer Amps Part Context

The OPA1637 belongs to the Burr-Brown audio operational amplifier family, designed specifically for high-performance audio signal chains. It integrates fully differential amplification into a compact 8-pin VSSOP package. The device utilizes Texas Instruments' proprietary super-beta transistor technology to achieve superior noise and offset characteristics compared to standard bipolar amplifiers.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Consult official documentation for qualified replacement part numbers. Verify pin compatibility and electrical specifications before substitution.