CDB5376 Cirrus Logic Inc, CDB5376 Datasheet - Page 21

• Manufacturer Part Number: CDB5376
• Description: EVALUATION BOARD FOR CS5376
• Manufacturer: Cirrus Logic Inc

Specifications of CDB5376

• Main Purpose: Seismic Evaluation System
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: CS3301A, CS3302A, CS4373A, CS5372A, CS5376A
• Primary Attributes: Quad Digital Filter
• Secondary Attributes: Graphical User Interface, SPI™ & USB Interfaces
• Processor To Be Evaluated: CS330x, CS4373A, CS537x
• Interface Type: USB
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: 598-1778

2.2.3.2
The CS5372A ∆Σ modulator requires differential offset to be enabled to eliminate idle tones for a termi-
nated input. The use of internal offset to eliminate idle tones is described in the CS5372A data sheet.
OFST is enabled by closing dip switch #4 (S5, #4 - HI).
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 CDB5376 should only be jumpered into the
INB inputs which do not have passive RC filter components installed. 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 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 jumpered
into either the INA or INB inputs without affecting performance. The buffered output can also drive a sen-
sor attached to the input screw terminals, provided the sensor meets the impedance requirements spec-
ified in the CS4373A data sheet.
DS612DB3
Analog Signals
OUT
BUF
CAP
VREF
Digital Signals
TDATA
MCLK
SYNC
MODE[0..2]
ATT[0..2]
Delta-Sigma Test DAC
Offset Enable - OFST
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
CDB5376
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