Demonstration board for low noise microphone preamplifier with 2 V bias based on the TS472

The STEVAL-CCA023V1 demonstration board is designed as an evaluation platform for the TS472 low noise microphone preamplifier with 2.0 V bias and active low standby mode.

The board supports customization of the testing conditions, allowing the gain of the TS472 device to be adjusted, or an electret microphone to be biased either externally or using the TS472 builtin 2.0 V bias voltage.

Key Features

  • Available in flip-chip ECOPACK® package and QFN24 4x4 mm
  • Low noise 2.0 V microphone bias output
  • RoHS compliant
  • ESD protection (2 kV)
  • 40 kHz bandwidth @ -3 dB and adjustable gain
  • Low distortion: 0.1% typ.
  • Low noise: 10 nV / √ Hz typ. equivalent input noise @ F=1 kHz
  • 2.2 V to 5.5 V single supply operation
  • Fully differential input/output
  • Fast start up time @ 0dB: 5 ms typ.
  • Active low standby mode function (1μA max)
  • Low power consumption @20 dB: 1.8 mA




Technical Documentation

Product Specifications
Description Version Size
DB0878 DB0878: Demonstration board for low noise microphone preamplifier with 2 V bias based on the TS472 1.1 73 KB
Application Notes
Description Version Size
AN2240 AN2240: Using the demonstration board for the TS472 low noise microphone preamplifier with 2 V bias 4.2 236 KB

Hardware Resources

Board Manufacturing Specifications
Description Version Size
Gerber files for STEVAL-CCA023V1 board 1.0 112 KB
Bill of Materials
Description Version Size
BOM for STEVAL-CCA023V1 board 1.0 3 KB
Schematic Packs
Description Version Size
Board schematics for STEVAL-CCA023V1 board 1.0 45 KB


License Agreement
Description Version Size
Demo products licence agreement 3.2 22 KB
Evaluation products license agreement 1.0 125 KB
Support & Community

Sample & Buy

Part Number Core Product Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STEVAL-CCA023V1 ActiveCARDIndustrialEcopack2

(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.