CRD-5378 Cirrus Logic Inc, CRD-5378 Datasheet - Page 18

• Manufacturer Part Number: CRD-5378
• Description: Audio Modules & Development Tools Ref Bd LP Sngl-Ch Decimation Filter
• Manufacturer: Cirrus Logic Inc

Specifications of CRD-5378

• Description/function: Audio D/A
• Operating Supply Voltage: 3.3 V
• Product: Audio Modules
• Supply Current: 100 mA
• For Use With/related Products: CS3302A, CS5373A, CS5378
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.2.4
The CS5373A test DAC creates differential analog signals for system tests. Multiple test modes are avail-
able and their use is described in the CS5373A data sheet.
2.2.4.1
The CS5373A test DAC has a precision output (DAC_OUT) that is routed directly to the amplifier INB in-
puts. The input impedance of the CS3301A/02A INB amplifier inputs are high enough that the precision
output can be directly connected to the INB inputs.
2.2.4.2
The CS5373A test DAC has a buffered output (DAC_BUF) that is routed to the amplifier INA inputs. This
output is less sensitive to loading than the precision outputs, and can drive a sensor attached to the am-
plifier INA inputs provided the sensor meets the impedance requirements specified in the CS5373A data
sheet.
2.2.5
A voltage reference on CRD5378 creates a precision voltage from the regulated analog supplies for the
modulator and test DAC VREF inputs. Because the voltage reference output is generated relative to the
negative analog power supply, VREF+ is near GND potential for bipolar power supplies.
18
Analog Signals
OUT
BUF
CAP
VREF
Digital Signals
TDATA
MCLK
SYNC
MODE[0..2]
ATT[0..2]
Specification
Precision Reference - Linear Tech
Surface Mount Package Type
Output Voltage Tolerance
Temperature Drift
Quiescent Current
Output Voltage Noise, 10 Hz - 1 kHz
Ripple Rejection, 10 Hz - 200 Hz
Delta-Sigma Test DAC
Voltage Reference
Precision Output - DAC_OUT
Buffered Output - DAC_BUF
Description
Capacitor connection for internal anti-alias filter
Voltage reference analog inputs
Description
Clock input
Synchronization input
Test mode selection
Attenuation range selection
Precision differential analog output
Buffered differential analog output
Delta-sigma test data input
Value
LT1019AIS8-2.5
SO-8
+/- 0.05%
10 ppm / degC
0.65 mA
4 ppm
> 100 dB
RMS
CRD5378
DS639RD2