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Cirrus Logic

CS5504 Datasheet Preview

CS5504 Datasheet

20-Bit A/D Converter

No Preview Available !

CCDCSB5S55550504044
EvaluLLaotoiwown-PpBoowowaeerrd,,22f0o0-r-BbCiittSAA5/5/DD04CCAoon/nDveCrotenrverter
Features
l Delta-sigma A/D Converter
- 20-bit, No Missing Codes
- Linearity Error: ±0.0007%FS
l 2 Differential Inputs
- Pin-selectable Unipolar/Bipolar Ranges
www.DataSheet4U- .cComommon Mode Rejection
105 dB @ dc
120 dB @ 50, 60 Hz
l Either 5V or 3.3V Digital Interface
l On-chip Self-calibration Circuitry
l Output Update Rates up to 200/Sps
l Low Power Consumption: 4.4 mW
Description
The CS5504 is a 2-channel, fully differential 20-bit, seri-
al-output CMOS A/D converter. The CS5504 uses
charge-balanced (delta-sigma) techniques to provide a
low cost, high-resolution measurement at output word
rates up to 200 samples per second.
The on-chip digital filter offers superior line rejection at
50 Hz and 60 Hz when the device is operated from a
32.768 kHz clock (output word rate = 20 Sps).
The CS5504 has on-chip self-calibration circuitry which
can be initiated at any time or temperature to ensure
minimum offset and full-scale errors.
Low power, high-resolution and small package size
make the CS5504 an ideal solution for loop-powered
transmitters, panel meters, weigh scales and battery-
powered instruments.
ORDERING INFORMATION
See page 23.
CS5504-BS -40° to +85° C 20-pin SOIC
I
VREF+
12
VREF-
13
VA+ VA- DGND VD+
14 15
16 17
AIN1+
AIN1-
8
10
AIN2+
AIN2-
9
11
MUX
4th-Order
Delta-Sigma
Modulator
Digital
Filter
Serial
Interface
Logic
2
CS
18 SCLK
19
SDATA
20
DRDY
A0 1
Calibration SRAM
Calibration µC
OSC
3 56
CONV XIN XOUT
4 CAL
7 BP/UP
Cirrus Logic, Inc.
PCh.rtOtyps.:/tB/awol wxSw1e7m.c8iir4cr7uo,snA.dcuousmctitno,rTPerxoadsu7c8ts76D0ivision
(512) 445 7222 FAX: (512) 445 7581
http://www.crystal.com
Copyright © CirrCuospLyoriggich,t I©ncC. i2rr0u0s5Logic, Inc. 1997
(All Rights Rese(rAvell dR)ights Reserved)
MAUARG ‘905
DSA1U2G6F1025
DS126DB12




Cirrus Logic

CS5504 Datasheet Preview

CS5504 Datasheet

20-Bit A/D Converter

No Preview Available !

CS5504
CS5504
ANALOG CHARACTERISTICS (TA = TMIN to TMAX; VA+ = 5V ± 10%; VA- = -5V ± 10%; VD+ =
3.3V ± 5%; VREF+ = 2.5V, VREF- = 0V; fCLK = 32.768kHz; Bipolar Mode; Rsource = 1kwith a 10nF to GND
at AIN.) (Notes 1, 2)
Parameter*
Min
Typ
Max
Units
Specified Temperature Range
Accuracy
-40 to +85
°C
Linearity Error
Differential Nonlinearity
www.DataSheetF4Uul.cl oSmcale Error
Full Scale Drift
Unipolar Offset
Unipolar Offset Drift
Bipolar Offset
Bipolar Offset Drift
Noise (Referred to Output)
Analog Input
Analog Input Range:
Common Mode Rejection:
Off Channel Isolation
Input Capacitance
(No Missing Codes)
(Note 3)
(Note 4)
(Note 3)
(Note 4)
(Note 3)
(Note 4)
Unipolar
Bipolar
dc
50, 60- Hz
(Note 5)
(Note 2)
-
20
-
-
-
-
-
-
-
-
-
-
120
-
-
0.0007
-
±4
±8
±8
±8
±4
±4
2.6
0 to +2.5
±2.5
105
-
120
15
0.0015
-
±32
-
±32
-
±16
-
-
±%FS
Bits
LSB
LSB
LSB
LSB
LSB
LSB
LSBrms
-V
-V
- dB
- dB
- dB
- pF
DC Bias Current
(Note 1)
-
5
- nA
Power Supplies
DC Power Supply Currents: ITotal
IAnalog
IDigital
- 465 600 µA
- 425 - µA
- 40 - µA
Power Dissipation
(Note 6)
-
4.4 6.0 mW
Power Supply Rejection
- 80 - dB
Notes:
1. Both source resistance and shunt capacitance are critical in determining the CS5504’s source
impedance requirements. Refer to the text section Analog Input Impedance Considerations.
2. Specifications guaranteed by design, characterization and/or test.
3. Applies after calibration at the temperature of interest.
4. Total drift over the specified temperature range since calibration at power-up at 25 °C
5. Common mode voltage may be at any value as long as AIN+ and AIN- remain within the VA+ and
VA- supply voltages.
6. All outputs unloaded. All inputs CMOS levels.
* Refer to the Specification Definitions immediately following the Pin Description Section.
Specifications are subject to change without notice.
2 DS126F21


Part Number CS5504
Description 20-Bit A/D Converter
Maker Cirrus Logic
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CS5504 Datasheet PDF






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