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PDF CS5373A Data sheet ( Hoja de datos )
| Número de pieza | CS5373A | |
| Descripción | High-performance Modulator and Test DAC | |
| Fabricantes | Cirrus Logic | |
| Logotipo |  |
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CS5373A
Low-power, High-performance ∆Σ Modulator and Test DAC
Modulator Features
z 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
z High Dynamic Range
• 127 dB SNR @ 215 Hz BW (2 ms sampling)
• 124 dB SNR @ 430 Hz BW (1 ms sampling)
z Low Total Harmonic Distortion
• -118 dB THD typical (0.000126%)
• -112 dB THD maximum (0.000251%)
z Low Power Consumption: 25 mW, 10 µW
Test DAC Features
z Digital ∆Σ Input from CS5378 Digital Filter
z Selectable Differential Analog Outputs
• Precision output (OUT±) for electronics tests
• Buffered output (BUF±) for sensor tests
z 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
z Selectable Attenuation for CS3301A / CS3302A
• 1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64
z 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
z Low Power Consumption
• AC modes / DC modes: 40 mW / 20 mW
• Sleep mode / Power down: 1 mW / 10 µW
Common Features
z Extremely Small Footprint
• 28-pin SSOP package, 8 mm x 10 mm
z 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.
VA+
VREF+ VREF-
VD
INR+
INF+
INF-
INR-
OUT+
OUT-
BUF+
BUF-
24-Bit
∆Σ
Modulator
Clock
Generator
Attenuator
1/1 to 1/64
24-Bit
∆Σ
Test DAC
MDATA
MFLAG
MCLK
MSYNC
TDATA
CAP+
CAP-
VA-
ATT(0, 1, 2)
MODE(0, 1, 2) GND
http://www.cirrus.com
Copyright © Cirrus Logic, Inc. 2006
(All Rights Reserved)
DEC ‘06
DS703F1
1 page  
CS5373A
TEMPERATURE CONDITIONS
Parameter
Symbol Min Typ Max
Unit
Ambient Operating Temperature
TA -40
-
85
ºC
Storage Temperature Range
TSTR
-65
-
150
ºC
Allowable Junction Temperature
TJCT
-
- 125
ºC
Junction to Ambient Thermal Impedance (4-layer PCB)
ΘJA
-
65
-
ºC / W
ABSOLUTE MAXIMUM RATINGS
Parameter
DC Power Supplies
Positive Analog
Negative Analog
Digital
Analog Supply Differential
(VA+) - (VA-)
Digital Supply Differential
(VD) - (VA-)
Input Current, Power Supplies
(Note 5)
Input Current, Any Pin Except Supplies
(Note 5, 6)
Output Current
(Note 5)
Power Dissipation
Analog Input Voltages
Digital Input Voltages
Symbol
VA+
VA-
VD
VADIFF
VDDIFF
IPWR
IIN
IOUT
PDN
VINA
VIND
Min
-0.5
-6.8
-0.5
-
-
-
-
-
-
(VA-) - 0.5
-0.5
Max
6.8
0.5
6.8
6.8
7.6
±50
±10
±25
500
(VA+) + 0.5
(VD) + 0.5
Parameter
V
V
V
V
V
mA
mA
mA
mW
V
V
WARNING: Operation at or beyond these limits may result in permanent damage to the device.
Normal operation is not guaranteed at these extremes.
Notes: 5. Transient currents up to ±100 mA will not cause SCR latch-up.
6. Includes continuous over-voltage conditions at the modulator analog input pins.
DS703F1
5
5 Page 
CS5373A
DAC AC DIFFERENTIAL MODES 1, 2, 3 (CONT.)
Signal to Noise
Signal to Noise
(OUT± Unloaded)
(Note 23)
Parameter
Signal to Noise
(BUF± Unloaded, 1 kΩ load)
(Note 23, 24)
Total Harmonic Distortion
Total Harmonic Distortion
(OUT± Unloaded)
(Note 16, 25)
Total Harmonic Distortion
(BUF± Unloaded)
(Note 16, 24, 25)
Total Harmonic Distortion
(BUF± 1 kΩ load)
(Note 16, 24, 25)
Symbol Min
1/1 -> 1x
1/2 -> 2x
1/4 -> 4x
1/8 -> 8x
1/16 -> 16x
1/32 -> 32x
1/64 -> 64x
1/1 -> 1x
1/2 -> 2x
1/4 -> 4x
1/8 -> 8x
1/16 -> 16x
1/32 -> 32x
1/64 -> 64x
SNROUT
SNRBUF
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1/1 -> 1x
1/2 -> 2x
1/4 -> 4x
1/8 -> 8x
1/16 -> 16x
1/32 -> 32x
1/64 -> 64x
1/1 -> 1x
1/2 -> 2x
1/4 -> 4x
1/8 -> 8x
1/16 -> 16x
1/32 -> 32x
1/64 -> 64x
1/1 -> 1x
1/2 -> 2x
1/4 -> 4x
1/8 -> 8x
1/16 -> 16x
1/32 -> 32x
1/64 -> 64x
THDOUT
THDBUF
THDBUFL
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Typ
114
114
114
113
111
108
103
110
106
101
95
89
83
77
-116
-115
-114
-112
-111
-110
-106
-108
-105
-100
-94
-88
-82
-76
-102
-101
-97
-92
-87
-82
-76
Max
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-112
-
-
-
-
-
-
-90
-
-
-
-
-
-
-80
-
-
-
-
-
-
Unit
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Notes: 23. Specification measured using CS3301A amplifier at corresponding gain with the modulator measuring
a 430 Hz bandwidth. Amplified noise dominates for x16, x32, x64 amplifier gains.
24. Buffered outputs (BUF±) include 1/f noise not present on the precision outputs (OUT±).
25. Specification measured using CS3301A amplifier at corresponding gain with the modulator measuring
a 430 Hz bandwidth. Amplified noise in the harmonic bins dominates THD measurements for x16, x32,
x64 amplifier gains.
DS703F1
11
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| PDF Descargar | [ Datasheet CS5373A.PDF ] | |
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