Smart Home Audio


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The ISD3800 is a digital ChipCorder® featuring digital compression, comprehensive memory management, and integrated analog/digital audio signal paths. The ISD3800 utilizes serial flash memory to provide non-volatile audio playback for a two-chip solution. The ISD3800 provides an I²S digital audio interface, faster digital programming, higher sampling frequency, and a signal path with SNR 80dB.

The ISD3800 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 ISD3800 supported sample rates.

The ISD3800 has inbuilt analog audio inputs, analog audio line driver, and speaker driver output.

The analog audio input, Aux-in, has a fixed gain configured by SPI command. Aux-in can directly feed-through to the analog outputs; it can also mix with the DAC output and then feed-through to the analog outputs.

Analog outputs are available in two forms: (1) Aux-out is an analog single-ended voltage output; (2) Class-AB BTL (bridge-tied-load) is an analog differential voltage output. Class-AB BTL delivers 1-watt output power at V CCSPK = 5V.

Class-D PWM direct-drive is also available, which delivers 1-watt output power at V CCSPK = 5V



  • Operating Voltage: 2.7 ~ 5.5V
  • Standby Current: 1uA typical
  • Package:
  • Green 48L-LQFP
  • Temperature Options:
  • Industrial: -40℃ to 85℃

For more details and documents, please link to Nuvoton Official Website GO

Volume discounts

QuantityDiscountYou Save
1008%Up to$26.40
Part No.ISD3800FYI
DurationExt. Flash up to 64 min
Sample Rate (KHz)Up to 48
Operating Voltage (V)2.7 to 5.5
Temp (°C )Industrial -40 to 85°C
Development ToolsISD-DMK_15D00
PackageLQFP48 (7x7)
StatusMass Production

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