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CS5373A Datasheet(PDF) 1 Page - Cirrus Logic

No. de Pieza. CS5373A
Descripción  Low-power, High-performance Modulator and Test DAC
Descarga  40 Pages
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Fabricante  CIRRUS [Cirrus Logic]
Página de inicio  http://www.cirrus.com
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CS5373A Datasheet(HTML) 1 Page - Cirrus Logic

 
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Copyright
© Cirrus Logic, Inc. 2006
(All Rights Reserved)
http://www.cirrus.com
CS5373A
Low-power, High-performance
∆Σ Modulator and Test DAC
Modulator Features
Fourth-order
∆Σ Architecture
• Clock-jitter-tolerant architecture
• Input signal bandwidth: DC to 2 kHz
• Max AC amplitude: 5 Vpp differential
• Max DC amplitude: ± 2.5 Vdc differential
High Dynamic Range
• 127 dB SNR @ 215 Hz BW (2 ms sampling)
• 124 dB SNR @ 430 Hz BW (1 ms sampling)
Low Total Harmonic Distortion
• -118 dB THD typical (0.000126%)
• -112 dB THD maximum (0.000251%)
Low Power Consumption: 25 mW, 10 µW
Test DAC Features
Digital
∆Σ Input from CS5378 Digital Filter
Selectable Differential Analog Outputs
• Precision output (OUT±) for electronics tests
• Buffered output (BUF±) for sensor tests
Multiple AC and DC Operational Modes
• Output signal bandwidth: DC to 100 Hz
• Max AC amplitude: 5 Vpp differential
• Max DC amplitude: + 2.5 Vdc differential
Selectable Attenuation for CS3301A / CS3302A
• 1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64
Outstanding Performance
• AC (OUT): -116 dB THD typical, -112 dB max
• AC (BUF): -108 dB THD typical, -90 dB max
• DC absolute accuracy: 0.4% typical, 1% max
Low Power Consumption
• AC modes / DC modes: 40 mW / 20 mW
• Sleep mode / Power down: 1 mW / 10 µW
Common Features
Extremely Small Footprint
• 28-pin SSOP package, 8 mm x 10 mm
Bipolar Power Supply Configuration
• VA+ = +2.5 V; VA- = -2.5 V; VD = +3.3 V
Description
The CS5373A is a high-performance, fourth-order
∆Σ
modulator integrated with a
∆Σ digital-to-analog convert-
er (DAC). When combined with a CS3301A / CS3302A
differential amplifier and the CS5378 digital filter, a
small, low-power, self-testing, high-accuracy, single-
channel measurement system results.
The modulator has high dynamic range and low total har-
monic distortion with very low power consumption. It
converts differential analog input signals from the
CS3301A / CS3302A amplifier to an oversampled serial
bit stream at 512 kbits per second. This oversampled bit
stream is then decimated by the CS5378 digital filter to a
24-bit output at the selected output word rate.
The test DAC operates in either AC or DC test modes.
AC test modes measure system dynamic performance
through THD and CMRR tests while DC test modes are
for gain calibration and pulse tests. It has two sets of dif-
ferential analog outputs, OUT and BUF, as dedicated
outputs for testing the electronics channel and for in-
circuit sensor tests. Output attenuation settings are
binary weighted and match the gain settings of the
CS3301A / CS3302A differential amplifiers for full-scale
testing at all gain ranges.
ORDERING INFORMATION
See page 39.
24-Bit
∆Σ
Test DAC
Attenuator
1/1 to 1/64
Clock
Generator
VA+
MODE(0, 1, 2)
ATT(0, 1, 2)
VD
VA-
VREF+
VREF-
GND
MCLK
MSYNC
24-Bit
∆Σ
Modulator
OUT+
OUT-
BUF+
BUF-
TDATA
CAP+
CAP-
MDATA
MFLAG
INR+
INF+
INF-
INR-
DEC ‘06
DS703F1


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