CDB5374 Cirrus Logic Inc, CDB5374 Datasheet - Page 18

• Manufacturer Part Number: CDB5374
• Description: Audio Modules & Development Tools 2-Ch DS Modulator & Hydrophone Demo Brd
• Manufacturer: Cirrus Logic Inc

Specifications of CDB5374

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.2.4
The CS4373A DAC creates differential analog signals for system tests. Multiple test modes are available
and their use is described in the CS4373A data sheet.
2.2.4.1
The CS4373A test DAC has a precision output (DAC_OUT) that is routed to the input selection jumpers
for each channel. This output is sensitive to loading, and on CDB5374 should only be jumper-ed into the
INB inputs which do not have passive RC filter components installed. The input impedance of the INB am-
plifier inputs are high enough that the precision output can be directly connected to the INB inputs of all
channels simultaneously.
2.2.4.2
The CS4373A test DAC has a buffered output (DAC_BUF) that is routed to the input selection jumpers
for each channel. This output is less sensitive to loading than the precision outputs, and can be jumper-
ed into either the INA or INB inputs without affecting performance. The buffered output can also drive a
sensor attached to the input screw terminals, provided the sensor meets the impedance requirements
specified in the CS4373A data sheet.
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Analog Signals
OUT
BUF
CAP
VREF
Digital Signals
TDATA
MCLK
SYNC
MODE[0..2]
ATT[0..2]
Delta-Sigma Test DAC
Precision Output - DAC_OUT
Buffered Output - DAC_BUF
Description
Precision differential analog output
Buffered differential analog output
Capacitor connection for internal anti-alias filter
Voltage reference analog inputs
Description
Delta-sigma test data input
Clock input
Synchronization input
Test mode selection
Attenuation range selection
CDB5374
DS862DB1