TPA9151-SO1R

Overview

The TPA9151-SO1R is a unity-gain difference amplifier designed for precision signal conditioning with a common voltage range of −275 V to +275 V. It operates on a supply voltage of 4.5 V to 36 V (±2.25 V to ±18 V) and features an offset voltage of ±1 mV maximum, gain error of 0.03% maximum, bandwidth of 500 kHz, and slew rate of 10 V/μs. The device includes EMI enhancement capabilities and functions within an operating temperature range of −40°C to 125°C.

Feature Summary

• Integrates on-chip matching resistors with high-precision amplifiers to achieve excellent gain accuracy, linearity, and CMRR over the operating temperature range.
• Features two reference input pins allowing flexible configuration for precise signal referencing in differential applications.
• Capable of replacing isolation amplifiers in systems where galvanic isolation is not required, simplifying circuit design.

Applications

• Current sense on high common voltage
• Battery voltage monitor
• Industrial control

Procurement Notes

Verify the specific suffix SO1R corresponds to the SOP-8 tape and reel packaging format containing 4000 units per reel as documented in the manufacturer's order information. Confirm that the component meets RoHS compatibility and halogen-free requirements specified under the Green designation. Ensure the ordering part number matches the exact pinout and reference pin configuration required for the target application design.

Selection Notes

Select this component when high common-mode voltage handling up to 275 V is necessary without requiring galvanic isolation. The dual reference inputs distinguish it from the single-reference TPA9152 variant. Consider the 500 kHz bandwidth and 10 V/μs slew rate for dynamic signal processing needs. Verify that the power supply rails fall within the ±2.25 V to ±18 V operational limits for optimal performance.

Part Context

The TPA9151 belongs to the 3PEAK family of general-purpose difference amplifiers. It shares the same package and thermal characteristics as the TPA9152 but differs in having two distinct reference input pins instead of one. Both devices utilize internal resistor trimming to maintain high CMRR and gain accuracy across the industrial temperature range.

Replacement Considerations

The TPA9152-SO1R serves as a direct substitute if only a single reference input is required, as it internally ties REFA and REFB together. Other variants such as TPA9151A-SO1R and TPA9151B-SO1R offer specific CMRR enhancements for different common-mode voltage ranges.

FAQ

What is the difference between the TPA9151 and TPA9152?

The TPA9151 provides two separate reference input pins (REFA and REFB), whereas the TPA9152 has only one reference input pin with the second reference pin left unconnected (NC).

Can the TPA9151 replace an isolation amplifier?

Yes, the datasheet states that the device can be used to replace isolation amplifiers in applications where galvanic isolation is not required.