TS472EIJT

Overview

The TS472EIJT is a differential-input microphone preamplifier from STMicroelectronics, optimized for high-performance audio systems. It operates on a single supply voltage ranging from 2.2 V to 5.5 V and features adjustable gain from 0 to 40 dB. The device includes a low noise 2.0 V microphone bias generator and offers fully differential input and output configurations. Key electrical specifications include a typical equivalent input noise of 10 nV/√Hz at 1 kHz, total harmonic distortion plus noise of 0.1%, and a power supply rejection ratio of 80 dB. It consumes 1.8 mA at 20 dB gain and supports an active low standby mode with maximum current of 1 μA.

Feature Summary

• Provides a very low noise 2.0 V microphone bias output for connected transducers.
• Features an active low standby mode function for efficient power management.
• Delivers fully differential input and output signals to enhance common-mode rejection.

Applications

• High-performance PDA audio systems
• Notebook computer audio subsystems

Procurement Notes

Verify the specific package variant when ordering, as the TS472 series is available in both QFN-24 and flip-chip packages. Confirm that the TS472EIJT designation corresponds to the 12-Flipchip (UFBGA/FCBGA) form factor required for your PCB layout. Ensure compatibility with surface-mount assembly processes suitable for small outline packages.

Selection Notes

Select this component for applications requiring low distortion and high power-supply rejection in portable devices. The adjustable gain range allows flexibility in signal conditioning before further processing. Consider the thermal performance and board space constraints associated with the flip-chip packaging solution compared to larger QFN options.

Part Context

The TS472EIJT belongs to the TS472 family of microphone preamplifiers designed by STMicroelectronics. This series is engineered specifically for mobile and portable electronics where audio quality and power efficiency are critical. The family shares core architectural features but differs in physical packaging to suit various manufacturing and design requirements.

Replacement Considerations

TS472IQT is a pin-compatible alternative within the same family, differing primarily in its QFN-24 package instead of the flip-chip configuration.