TPA2295CF-VS1R-S

Overview

The TPA2295CF-VS1R-S is a high-voltage, high-side current sense amplifier with an internal comparator and voltage reference. It features a gain of 50 V/V and operates from a single 3.0V to 18V supply. The device supports common-mode voltages from -0.1V to +70V with a typical CMRR of 130dB. It offers a bandwidth of 500kHz and a slew rate of 20 V/μs. The input offset voltage is ±500μV max over the temperature range. The package is MSOP-8.

Feature Summary

• Zero-drift core technology ensures low offset drift of 0.5μV/°C across the operating temperature range.
• Integrated open-drain comparator with latching capability and an internal 0.6V reference.
• High common-mode rejection ratio of up to 130dB through the entire common voltage range.
• Capable of sensing shunt drops at common-mode voltages extending from -0.1V to 70V.

Applications

• Current sensing in automotive and industrial control systems
• Battery chargers and power management circuits
• Base stations and telecom equipment monitoring

Procurement Notes

Verify the specific suffix VS1R-S corresponds to the tape and reel packaging format containing 3,000 units per reel as documented in the order information table. Confirm that the CF designation strictly indicates the 50 V/V gain configuration for your circuit design requirements. Ensure compatibility with the MSOP-8 thermal characteristics during integration.

Selection Notes

Select this component when high accuracy is required over wide temperature ranges due to its zero-drift architecture. The 50 V/V gain is suitable for applications requiring moderate amplification of small sense voltages. Consider the 70V common-mode limit and 18V supply constraint when designing the power stage. The integrated comparator simplifies designs needing immediate threshold detection without external components.

Part Context

This part belongs to the TPA2295C family of high-voltage current sense amplifiers. Other variants in the family include TPA2295CT (20V/V), TPA2295CS (60V/V), TPA2295CH (100V/V), and TPA2295CW (200V/V). All share similar electrical characteristics but differ in output voltage scaling factors to accommodate various shunt resistor values and full-scale output requirements.

Replacement Considerations

Direct substitutes are not explicitly listed in the provided documentation. Designers should evaluate other high-side current sense amplifiers offering similar 50V/V gain, 70V common-mode range, and MSOP-8 packaging if replacement is necessary.

FAQ

What is the function of the RESET pin on the TPA2295CF?

The RESET pin is used to reset the internal comparator output. It is active low and requires a minimum pulse width of 0.2 μs to clear the latched state.

Can the TPA2295CF measure currents when the load voltage exceeds the supply voltage?

Yes, the input circuitry can accurately measure beyond its power-supply voltage (Vs). For example, Vs can be 5V while the load supply voltage is up to 70V, though the output swing is limited by Vs.

How does the zero-drift feature benefit current sensing applications?

The zero-drift performance allows for lower full-scale drops across the sense resistor (e.g., ~10mV vs 100mV) while maintaining equivalent accuracy, which significantly reduces power dissipation in the shunt resistor.