Skip to main content
Log in
Analog Devices AD1981BJST-LV — Logic ICs

AD1981BJST-LV AC'97 Stereo Audio Codec, 16/20-bit, 48-LQFP

MPNAD1981BJST-LV
End of Life

Analog Devices AD1981B series, AD1981BJST-LV, AC'97 Stereo Audio codec, 16 b, 20 b resolution, 4 / 2 ADCs/DACs, 85 / 90 dB dynamic range, 4.5V ~ 5.5V analog, 3V ~ 3.47V digital, 0°C ~ 70°C, Surface Mount, 48-LQFP.

$2.65Ref. price · indicative, final on quote
Packaging48-LQFP
RoHSRoHS non-compliant
SeriesAD1981B
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

AD1981BJST-LV specifications
ParameterValue
TypeAC' 97, Stereo Audio
SeriesAD1981B
MountingSurface Mount
Voltage - supply, analog4.5V ~ 5.5V
Voltage - supply, digital3V ~ 3.47V
Data interfaceAC'97, DSP, S/PDIF
Operating temperature0°C ~ 70°C (TA)
PackageBulk
Sigma deltaYes
Case48-LQFP
Resolution16 b, 20 b
Number of ADCs (DACs)4 / 2
Dynamic range, ADCs (DACs (db) typ)85 / 90

Product details

AC'97 codec with 4-channel ADC front end

The Analog Devices AD1981BJST-LV is a stereo audio codec implementing the AC'97 specification, built around a sigma-delta modulator core. It provides four ADC channels and two DAC channels at 16-bit or 20-bit resolution, with a typical dynamic range of 85 dB on the ADC side and 90 dB on the DAC side. The part is aimed at motherboard audio, multimedia sound cards, and embedded systems that need a legacy AC'97 link to a host controller or DSP.

Package and interface

Housed in a 48-lead LQFP (7x7 mm body), the AD1981BJST-LV connects to the host via an AC'97 digital link and also supports DSP and S/PDIF data interfaces. The surface-mount package is suited for automated assembly on standard PCB processes.

Frequently asked questions

What is the difference between AD1981BJST and AD1981BJST-LV?

The suffix '-LV' typically denotes a low-voltage variant in the AD1981B series. The AD1981BJST-LV operates on a 3.3 V digital supply (3 V to 3.47 V) and a 5 V analog supply, while the base AD1981BJST may have different supply tolerances. Check the respective datasheets for exact parametric differences.

Can AD1981BJST-LV replace an older AD1981B codec?

Yes, the AD1981BJST-LV is a current-production member of the AD1981B series and is intended as a form-fit-function replacement for earlier AD1981B codecs in the same 48-LQFP package, provided the supply rails and host interface match.