CRD-5376 Cirrus Logic Inc, CRD-5376 Datasheet - Page 19

• Manufacturer Part Number: CRD-5376
• Description: Audio Modules & Development Tools Ref Bd LP Mlt-Ch Decimation Filter
• Manufacturer: Cirrus Logic Inc

Specifications of CRD-5376

• Description/function: Audio D/A
• Operating Supply Voltage: 3.3 V
• Product: Audio Modules
• Supply Current: 300 mA
• For Use With/related Products: CS3301A, CS3302A, CS4373A, CS5371A, CS5372A, CS5376A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.2.5.1
The voltage reference output is provided to the CS5372A ∆Σ modulators and the CS4373A test DAC
through separate low pass RC filters. By separately filtering the voltage reference for each device, signal
dependent sampling of VREF by one device is isolated from other devices. Each voltage reference signal
is routed as a separate differential pair from the large RC filter capacitor to control the sensitive VREF
source-return currents and keep them out of the ground plane. In addition to the RC filter function, the
100 uF filter capacitor provides a large charge-well to help settle voltage reference sampling transients.
2.3
2.3.1
The CS5376A quad digital filter performs filtering and decimation of four delta-sigma bit streams from the
CS5372A modulators. It also creates a delta-sigma bit stream output to create analog test signals in the
CS4373A test DAC.
The CS5376A requires several control signal inputs from the external system.
Configuration is completed through the SPI 1 port.
DS612RD2
Digital Hardware
Control Signals
RESETz
BOOT
TIMEB
CLK
SYNC
SPI1 Signals
SSIz
SCK1
MISO
MOSI
SINTz
SSOz
Digital Filter
VREF_MOD12, VREF_MOD34, VREF_DAC
Serial chip select output (unused on CRD5376)
Description
Reset input, active low
Microcontroller / EEPROM boot mode select
Time Break input, rising edge triggered
Master clock input, 32.768 MHz
Master synchronization input, rising edge triggered
Description
Serial chip select input, active low
Serial clock input
Master in / slave out serial data
Master out / slave in serial data
Serial acknowledge output, active low
CRD5376
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