CDB5376 Cirrus Logic Inc, CDB5376 Datasheet - Page 19

• 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

3. SYSTEM DESIGN WITH CS5376A
Figure 9 illustrates a simplified block diagram of
the CS5376A in a multi-channel measurement sys-
tem.
Up to four differential sensors are connected
through CS3301A/02A differential amplifiers to
the CS5371A/72A ∆Σ modulators, where analog to
digital conversion occurs. Each modulators 1-bit
output connects to a CS5376A MDATA input,
where the oversampled ∆Σ data is decimated and
filtered to 24-bit output samples at a programmed
output rate. These output samples are buffered in
an 8-deep data FIFO and passed to the system te-
lemetry on command.
System self tests are performed by connecting the
CS5376A test bit stream (TBS) generator to the
CS4373A test DAC. Analog tests drive differential
signals from the CS4373A test DAC into the mul-
tiplexed inputs of the CS3301A/02A amplifiers or
DS612F4
Hydrophone
Hydrophone
Hydrophone
Hydrophone
Geophone
Geophone
Geophone
Geophone
Sensor
Sensor
Sensor
Sensor
or
or
or
or
M
U
M
U
X
X
M
U
X
M
U
X
Figure 9. Multi-Channel System Block Diagram
AMP
AMP
AMP
AMP
CS3301A
CS3302A
CS3301A
CS3302A
CS3301A
CS3302A
CS3301A
CS3302A
Switch
Switch
MUX
MUX
Modulator
Modulator
CS5371A
CS5372A
CS5371A
CS5372A
∆Σ
∆Σ
directly to the sensors through external analog
switches. Digital loopback tests internally connect
the TBS digital output directly to the CS5376A
modulator inputs.
3.1 Power Supplies
The multi-channel system shown in Figure 9 typi-
cally operates from a
and a 3.3 V digital power supply. The CS5376A
logic core can be powered from 3 V to minimize
power consumption, if required.
3.2 Reset Control
System reset is required only for the CS5376A de-
vice, and is a standard active low signal that can be
generated by a power supply monitor or microcon-
troller. Other system devices default to a power-
down state when the CS5376A is reset.
CS5376A
Digital Filter
CS4373A
DAC
Test
±
2.5 V analog power supply
System Telemetry
Communication
Configuration
µController
EEPROM
Interface
CS5376A
or
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