TPA9151A-SO1R

Overview

The TPA9151A-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 a maximum offset voltage of ±1 mV and a gain error of 0.03%. The device provides a bandwidth of 500 kHz and a slew rate of 10 V/μs, while incorporating EMI enhancement capabilities. It 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 and linearity over the operating temperature range.
• Features enhanced common-mode rejection ratio (CMRR) specifically optimized for the TPA9151A variant under defined common-mode conditions.
• Supports input signals extending beyond the power supply rails through internal resistor divider networks.

Applications

• Current sensing in high common-voltage environments
• Battery voltage monitoring systems
• Industrial control applications

Procurement Notes

Verify that the specific ordering suffix SO1R corresponds to the SOP8 package and tape-and-reel shipping format as documented in the manufacturer's order information table. Confirm that the A suffix denotes the specific CMRR performance tier required for your application design. Ensure compatibility with standard SOP8 footprint dimensions during PCB layout.

Selection Notes

Select this component when galvanic isolation is not required but high common-mode voltage handling is necessary. The TPA9151A offers improved CMRR compared to the base model under specific test conditions. Evaluate the 500 kHz bandwidth against system requirements to ensure adequate signal fidelity for dynamic measurements.

Part Context

This device belongs to the TPA9151/TPA9152 family of general-purpose difference amplifiers manufactured by 3PEAK. These devices are engineered to replace traditional isolation amplifiers in cost-sensitive designs where electrical isolation is unnecessary. The family utilizes proprietary trimming techniques to maintain high precision across varying thermal conditions.

Replacement Considerations

The TPA9151A serves as a performance-enhanced variant of the standard TPA9151. Both share identical pin configurations and packaging. Verify that the specific CMRR specifications of the TPA9151A align with the design requirements before substituting the base model.

FAQ

How does the TPA9151A differ from the standard TPA9151?

The TPA9151A provides an improved Common-Mode Rejection Ratio (CMRR) of up to 96 dB at a common-mode voltage of 0 V to 60 V, whereas the standard TPA9151 specifies a minimum of 80 dB and typical of 95 dB under similar conditions.

What is the maximum common-mode voltage supported by the device?

The device supports a common-mode voltage range from −275 V to +275 V, which is guaranteed by production testing.