ADAU1977 - ADI

The pictures are for reference only, and the specific specifications can be found in the product manual.

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Part No

ADAU1977
Manufacturer

ADI
ChipWorker Part#

CW543101093
Description

Quad ADC with Diagnostics (10V Input)
Documentation

Datasheet
Ships from

Moscow
Наличие

In Stock
Estimated Price

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ADAU1977 Specifications

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Attribute	Attribute Value

Part Number	ADAU1977
Manufacturer	ADI
ChipWorker Part#	CW543101093
Documentation	Datasheet
	expand all
Product Lifecycle Status	Active

Similar & Replacement Parts

Product Description

Product Details
The ADAU1977 incorporates four high performance analog-todigital converters (ADCs) with direct-coupled inputs capable of 10 V rms. The ADC uses multibit sigma-delta (Σ-Δ) architecture with continuous time front end for low EMI. The ADCs can be connected to the electret microphone (ECM) directly and provide the bias for powering the microphone. Built-in diagnostic circuitry detects faults on input lines and includes comprehensive diagnostics for faults on microphone inputs. The faults reported are short to battery, short to microphone bias, short to ground, short between positive and negative input pins, and open input terminals. In addition, each diagnostic fault is available as an IRQ flag for ease in system design. An I2C/SPI control port is also included. The ADAU1977 uses only a single 3.3 V supply. The part internally generates the microphone bias voltage. The microphone bias is programmable in a few steps from 5 V to 9 V. The low power architecture reduces the power consumption. An on-chip PLL can derive the master clock from an external clock input or frame clock (sample rate clock). When fed with a frame clock, the PLL eliminates the need for a separate high frequency master clock in the system. The ADAU1977 is available in a 40-lead LFCSP package.*APPLICATIONS**
Automotive audio systems
Active Noise Cancellation System
### Features and Benefits
Programmable microphone bias (5 V to 9 V) with diagnostics
Four 10 V rms capable direct-coupled differential inputs
On-chip PLL for master clock
Low EMI design
106 dB ADC dynamic range
−95 dB THD + N
Selectable digital high-pass filter
24-bit ADC with 8 kHz to 192 kHz sample rates
See data sheet for additional features

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- Carefully tested and packaged by ChipWorker
- Vacuum packed
- Anti-static packaging
- Anti-vibration foam
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