TPA1861-SR

Instrumentation, Op Amps, Buffer Amps Overview

The TPA1861-SR is a single-channel, zero-drift operational amplifier from the TPA186x series manufactured by 3PEAK. It operates on a supply voltage range of 4.5 V to 40 V or ±2.25 V to ±20 V. Key electrical parameters include a maximum offset voltage of ±30 μV, a gain-bandwidth product of 6 MHz, and a slew rate of 5 V/μs. The device draws a quiescent current of approximately 1.4 mA per amplifier at 30 V. It features rail-to-rail output capability, low noise density of 8 nV/√Hz at 1 kHz, and excellent EMI suppression performance rated at 85 dB at 1 GHz. The component includes over-temperature protection and supports capacitive loads up to 1 nF.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Zero-drift architecture ensures high precision with low offset voltage and minimal drift across temperature ranges.
• High supply voltage tolerance allows operation in demanding industrial environments up to 40 V.
• Integrated over-temperature protection safeguards the device during thermal stress conditions.
• Robust EMI immunity maintains signal integrity in electrically noisy applications.

Instrumentation, Op Amps, Buffer Amps Applications

• Instrumentation systems requiring high accuracy
• Active filters and ASIC input/output buffering
• Sensor interface circuits
• Motor control applications
• Industrial control systems

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific package type and ordering suffix when sourcing. The TPA1861-SR designation corresponds to the SOP-8 package configuration. Confirm that the required quantity aligns with standard tape and reel packaging specifications provided by the manufacturer. Ensure compatibility with RoHS3 compliance standards for environmental regulations.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component for applications necessitating high DC accuracy combined with moderate AC bandwidth. The zero-drift technology minimizes calibration requirements compared to standard chopper amplifiers. Consider the 40 V supply range suitability for high-voltage signal processing tasks. Evaluate thermal management needs given the operating temperature range and power dissipation characteristics under load.

Instrumentation, Op Amps, Buffer Amps Part Context

The TPA1861-SR belongs to the TPA186x family of high-supply-voltage amplifiers produced by 3PEAK. This series utilizes proprietary design techniques to achieve stable high-frequency response while maintaining low power consumption. The family includes dual (TPA1862) and quad (TPA1864) variants offering similar electrical performance across multiple package options including SOP, MSOP, DFN, and TSSOP configurations.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Direct pin-compatible substitutes within the same family include TPA1862-SR for dual-channel applications and TPA1864-SR for quad-channel implementations. Verify functional equivalence regarding offset voltage, bandwidth, and supply voltage limits before substituting with other manufacturers' zero-drift op-amps.

Instrumentation, Op Amps, Buffer Amps FAQ

What is the common-mode input voltage range?

The common-mode input voltage range extends from the negative supply rail (V-) to 1.5 V below the positive supply rail (V+).

How does the over-temperature protection function?

When the die temperature reaches approximately 170°C, the output enters a high-impedance state. Functionality recovers automatically when the temperature drops to around 150°C.

Can the TPA1861-SR drive capacitive loads?

Yes, the device is designed to drive any capacitive load, with a specified maximum capacitive load drive capability of 1 nF.