CS4373A-ISZ Cirrus Logic Inc, CS4373A-ISZ Datasheet - Page 16

• Manufacturer Part Number: CS4373A-ISZ
• Description: IC,D/A CONVERTER,SINGLE,24-BIT,SSOP,28PIN
• Manufacturer: Cirrus Logic Inc

Specifications of CS4373A-ISZ

• Rohs Compliant: YES
• Number Of Bits: 24
• Number Of Converters: 1
• Voltage Supply Source: Analog and Digital, Dual ±
• Power Dissipation (max): 10mW
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 598-1778 - EVALUATION BOARD FOR CS5376
• Data Interface: -
• Settling Time: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 598-1646

2. GENERAL DESCRIPTION
The CS4373A is a differential output digital-to-
analog converter with multiple operational
modes and programmable output attenuation.
It provides self-test and precision calibration
capability for high-resolution, low-frequency
measurement
CS3301A / CS3302A differential amplifiers,
CS5371A / CS5372A ∆Σ modulators, and the
CS5376A digital filter.
2.1 Digital Inputs
The CS4373A is driven by a ∆Σ digital bit
stream from the CS5376A digital filter test bit
stream (TBS) generator. The digital filter also
provides clock and sync signals as well as
GPIO control signals to set the operational
mode and attenuation.
2.2 Analog Outputs
Two sets of differential analog outputs, OUT
and BUF, simplify system design as dedicated
outputs for testing the electronics channel and
for in-circuit sensor tests. Output attenuator
settings are binary weighted (1, 1/2, 1/4, 1/8,
1/16,
CS3301A / CS3302A amplifier input levels for
full-scale testing at all gain ranges.
16
1/32,
systems
1/64)
TDATA
VREF+
VREF-
and
designed
VA+
VA-
Figure 4. CS4373A Block Diagram
match
MODE(0, 1, 2)
CAP+ CAP-
24-Bit ∆Σ
DAC
from
the
ATT(0, 1, 2)
Attenuator
For maximum performance, the precision out-
puts (OUT±) must drive only high-impedance
loads such as the CS3301A / CS3302A ampli-
fier inputs. The buffered outputs (BUF±) can
drive lower-impedance loads, down to 1 kΩ,
but with reduced performance compared to
the precision outputs.
2.3 Multiple Operational Modes
The CS4373A operates in either AC or DC test
modes. AC test modes (MODE 1, 2, 3, 6) are
used to measure system THD and CMRR per-
formance. DC test modes (MODE 4, 5) are for
gain calibration and pulse tests.
2.4 Low Power
The CS4373A is optimized for low-power op-
eration and has a restricted operational band-
width in the AC modes. For stable operation,
full-scale AC test signals must not contain fre-
quencies above 100 Hz. AC test signals above
100 Hz (TBS impulse mode, for example)
must have a -20 dB reduced amplitude to en-
sure stability of the CS4373A low-power ∆Σ ar-
chitecture.
Generator
Clock
GND
VD
OUT+
OUT-
BUF+
BUF-
MCLK
MSYNC
CS4373A
DS699F2