TLV1018-25YDCR

Overview

The TLV1018-25YDCR is an audio amplifier designed for three-wire analog electret microphones. It features a fixed voltage gain of 25 dB and operates within a supply voltage range of 1.7 V to 5 V. The device draws a typical supply current of 70 μA, ensuring extended battery life in portable applications. Electrical characteristics include a signal-to-noise ratio of 61 dB, a power-supply rejection ratio of 65 dB, and a maximum input signal capability of 170 mV peak-to-peak at 1 kHz. It is characterized for operation over a free-air temperature range of –40 °C to 85 °C.

Feature Summary

• Provides a fixed internal voltage gain of 25 dB optimized for audio-band applications.
• Features low supply current consumption to extend battery life in always-on microphone circuits.
• Includes a built-in low-frequency cut-off filter to reduce wind and handling noise effects.

Applications

• Mobile communications devices
• Bluetooth communication links
• Cellular phones
• Accessory microphone products

Procurement Notes

Verify the component status before procurement as the datasheet indicates this specific part may be obsolete. Confirm that the YDC package dimensions align with the target PCB footprint. Ensure the design accommodates the specified operating temperature range of -40°C to 85°C. Validate that the 25 dB gain setting matches the system requirements for the connected electret microphone.

Selection Notes

Select this component when a fixed high-gain amplification stage is required directly integrated with an electret microphone. The 25 dB gain variant is suitable for applications needing higher output levels compared to the 15 dB version. Consider the ultra-thin lead-free package for space-constrained designs where the amplifier must fit inside the microphone housing or closely adjacent to it.

Part Context

This device belongs to the TLV1018 family of audio amplifiers specifically engineered for small-form-factor electret microphones. It serves as a replacement for traditional JFET preamplifiers, offering superior performance through lower supply current and improved noise characteristics. The family includes variants with different fixed gains to suit various sensitivity requirements.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.