TP5591-SR

Instrumentation, Op Amps, Buffer Amps Overview

The TP5591-SR is a single-channel chopper-stabilized zero-drift operational amplifier manufactured by 3PEAK. It operates on a single supply voltage ranging from +1.8 V to +5.5 V or split supplies of ±0.9 V to ±2.75 V. Key electrical specifications include a maximum input offset voltage of 20 μV and an offset temperature drift of 0.01 μV/°C. The device features a gain-bandwidth product of 3.3 MHz, a slew rate of 2.5 V/μs, and a quiescent current of 470 μA per amplifier. Input noise density is 17 nV/√Hz at 1 kHz, with low-frequency noise (0.1 Hz to 10 Hz) at 370 nVPP. It offers rail-to-rail input and output swing, high CMRR and PSRR of 127 dB, and an overload recovery time of 35 μs. The component is available in the SOP-8 package.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Chopper-stabilized architecture providing near-zero offset voltage drift over time and temperature variations.
• Rail-to-rail input and output capability allowing operation close to supply rails within millivolt margins.
• Ultra-low flicker noise performance with a 1/f noise corner frequency as low as 0.1 Hz.
• High precision characteristics including 127 dB common-mode rejection ratio and power supply rejection ratio.

Instrumentation, Op Amps, Buffer Amps Applications

• Medical Instrumentation
• Precision Current Sensing
• Temperature Measurements
• Precision Low-Drift, Low-Frequency ADC Drivers
• Process Control Systems

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific ordering suffix matches the required package configuration, as the TP5591 series includes multiple variants such as SOT23-5 and SOT353. Confirm that the SOP-8 tape and reel quantity aligns with manufacturing requirements. Ensure environmental compliance standards are met for the target region. Validate that the operating temperature range covers the intended application environment. Cross-reference pinout diagrams during schematic capture to prevent layout errors.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when ultra-low DC offset and minimal drift are critical system requirements. The zero-drift technology effectively eliminates 1/f noise, making it suitable for sub-Hertz signal processing. Consider the 3.3 MHz bandwidth for applications requiring moderate speed alongside high DC accuracy. Evaluate the 470 μA supply current against power budget constraints. Ensure source impedance balancing is implemented to minimize offset current effects due to charge injection.

Instrumentation, Op Amps, Buffer Amps Part Context

The TP5591-SR belongs to the TP559x family of low-noise, zero-drift operational amplifiers produced by 3PEAK. This series integrates single, dual, and quad amplifier configurations optimized for precision analog signal conditioning. The design utilizes auto-calibration techniques to maintain high accuracy while minimizing power consumption. The family supports both single and dual supply operations, catering to diverse industrial and consumer electronic applications.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the documentation.

Instrumentation, Op Amps, Buffer Amps FAQ

How does the chopping technique affect low-frequency noise?

The chopper-stabilized design significantly reduces flicker noise, lowering the 1/f noise corner to 0.1 Hz and ensuring superior performance at DC and low frequencies compared to standard amplifiers.

What is the recommended approach for managing input bias current effects?

To minimize offset voltage shifts caused by charge injection, the input impedance should be kept low and balanced across the non-inverting and inverting terminals.

Is external filtering required for residual ripple?

Yes, a post-filter is recommended at the amplifier output to suppress noise at the chopping frequency and its harmonics if the input signal spectrum is nearby.