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The ISD3900 is a multi-message ChipCorder® featuring digital compression, comprehensive memory management, and integrated analog/digital audio signal paths. The message management feature is designed to make message recording simple and address-free as well as make code development easier for playback-only applications. The ISD3900 utilizes winbond 25X/25Q series flash memory to provide non-volatile audio record/playback for a two-chip solution. Unlike other ChipCorder series, the ISD3900 provides an I²S digital audio interface, faster digital recording, higher sampling frequency, and a signal path with SNR equivalent to 12bit resolution.

The ISD3900 can take digital audio data via I²S or SPI interface. When I²S input is selected, it will replace the analog audio inputs and will support sample rates of 32, 44.1 or 48 kHz depending upon clock configuration. When SPI interface is chosen, the sample rate of the audio data sent must be one of the ISD3900 supported sample rates.

The ISD3900 has built-in analog audio inputs, analog audio line driver, and speaker driver output. The two analog audio inputs to the device are: (1) AUXIN has a fixed gain configured by SPI command, and (2) ANAIN/ANAOUT has a fixed gain amplifier with the gain set by two external resistors. ANAIN/ANAOUT can also be used as a microphone differential input (ANAIN/ANAOUT becomes MIC+/MIC-) in conjunction with an automatic gain control (AGC) circuit configured by SPI command. Analog outputs are available in three forms: (1) AUXOUT is a single-ended voltage output; (2) AUDOUT can be configured as either a single-ended voltage output or a single-ended current output; (3) BTL (bridge-tied-load) is a differential voltage output.

  • Standby Current: 1uA typical
  • Package:
  • Green 48L-LQFP
  • Temperature Options:
  • Industrial: -40℃ to 85℃
  • Operating Voltage: 2.7 - 3.6V

Data Sheet

  • Data Sheet

  • File name Version Update Download
  • EN_ISD3900_Datasheet_v1.5.pdf 1.5  2014/01/28
  • Software

  • File name Version Update Download
  • ISD-VPE15100 for Windows7 64bit 151.0023  2013/09/06
  • ISD-VPE15100 Version 151.0023 For Windows XP 151.0023  2011/09/27
  • ISD-VPE15100 Version 151.0023 For Windows 7 32bit 151.0023  2011/09/23
  • ISD-VPE15100 for Windows7 32bit 151.0023  2013/09/05
  • Development Tool

  • File name Version Update Download
  • ISD15C00-ISD3900 DMK Quick Start Guide 1.0  2016/04/20
  • ISD15100-3900-15C00 Demo User's manual 1.0  2016/04/20
  • ISD-ES-MINI-USB User Manual 1.1  2016/04/23
  • User Manual

  • File name Version Update Download
  • ISD3900 Design Guide 1.5  2013/12/18
  • ISD API User Manual 1.0  2013/09/19
  • ISD-DEMO15100/3900/15C00 demo board user manual 0.1  2013/09/19
  • ISD-ES_MINI_USB USB dongle manual Rev 1.0  2016/02/19
  • App Note: Use_Nuvoton_Audio_PA_to_amplify_the_ChipCorder_device_PWM_output 0.1  2013/09/21
  • App Note: ISD15100-3900-15C00_Errata_Rev-0.1 0.1  2013/09/21


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Part No. Check Disty Description Duration Sample Rate(kHz) Voltage Package Temperature Status
ISD3900 Check Disty Multi-message record/playback with I2S digital audio and SPI interfaces Ext. Flash up to 64 min Up to 48khz 2.7 to 3.6V LQFP48 Industrial -40 to 85 ° C Mass Production

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