ADAU1461 SigmaDSP Stereo, Automotive Low Power, 96 kHz, 24-Bit Audio Codec with Integrated PLL

The ADAU1461 is a low power, stereo audio codec with integrated digital audio processing that supports stereo 48 kHz record and playback at 35 mW from a 3.3 V analog supply. The stereo audio ADCs and DACs support sample rates from 8 kHz to 96 kHz as well as a digital volume control.

The SigmaDSP® core features 28-bit processing (56-bit double precision). The processor allows system designers to compensate for the real-world limitations of microphones, speakers, amplifiers, and listening environments, resulting in a dramatic improvement in the perceived audio quality through equalization, multiband compression, limiting, and third-party branded algorithms.

The SigmaStudio™ graphical development tool is used to program the ADAU1461. This software includes audio processing blocks such as filters, dynamics processors, mixers, and low level DSP functions for fast development of custom signal flows.

The record path includes an integrated microphone bias circuit and six inputs. The inputs can be mixed and muxed before the ADC, or they can be configured to bypass the ADC. The ADAU1461 includes a stereo digital microphone input.

The ADAU1461 includes five high power output drivers (two differentials and three single-ended), supporting stereo head-phones, an earpiece, or other output transducer. AC-coupled or capless configurations are supported. Individual fine level controls are supported on all analog outputs. The output mixer stage allows for flexible routing of audio.

Applications

Automotive head units
Automotive amplifiers
Navigation systems
Rear-seat entertainment systems

Data Sheet, Rev. 0, 5/10

Features and Benefits

SigmaDSP 28-/56-bit, 50 MIPS digital audio processor
Fully programmable with SigmaStudio graphical tool
24-bit stereo audio ADC and DAC: >98 dB SNR
Sampling rates from 8 kHz to 96 kHz
Low power: 17 mW record, 18 mW playback, 48 kHz
6 analog input pins, configurable for single-ended or differential inputs
Flexible analog input/output mixers
Stereo digital microphone input
Analog outputs: 2 differential stereo, 2 single-ended stereo, 1 mono headphone output driver
PLL supporting input clocks from 8 MHz to 27 MHz
Analog automatic level control (ALC)
Microphone bias reference voltage

Analog and digital I/O: 3.3 V
I2C and SPI control interfaces
Digital audio serial data I/O: stereo and time-division multiplexing (TDM) modes
Software-controllable clickless mute
GPIO pins for digital controls and outputs
32-lead, 5 mm × 5 mm LFCSP
−40°C to +105°C operating temperature range
Qualified for automotive applications
Digital Microphone inputs, headphone amp, Frac PLL

Data Sheets

Document	note
ADAU1461: SigmaDSP Stereo, Low Power, 96 kHz, 24-Bit Audio Codec with Integrated PLL Data Sheet (Rev. 0)	PDF 2018 kB

Application Notes

Document	note
AN-951: Using Hardware Controls with SigmaDSP GPIO Pins (Rev. A)	PDF 439 kB
AN-1006: Using the EVAL-ADUSB2EBZ (Rev. A)	PDF 349 kB

Frequently Asked Questions

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Order Information

Part Number	Package	Packing Qty	Temp Range	RoHS
ADAU1461WBCPZ Last Time Buy	32 ld LFCSP (5x5mm) w/3.5mm exposed pad	OTH 490	-40 to 105C	Y
ADAU1461WBCPZ-R7 Last Time Buy	32 ld LFCSP (5x5mm) w/3.5mm exposed pad	REEL 1500	-40 to 105C	Y
ADAU1461WBCPZ-RL Last Time Buy	32 ld LFCSP (5x5mm) w/3.5mm exposed pad	REEL 5000	-40 to 105C	Y