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CS5525-AP Datasheet

  • CS5525-AP

  • Cirrus Logic [16 BIT / 20 BIT MULTI RANGE ADC WITH 4 BIT LA...

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  • CIRRUS

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CS5525
CS5526
16-Bit/20-Bit Multi-Range ADC with 4-Bit Latch
Features
Delta-Sigma A/D Converter
-
Linearity Error: 0.0015%FS
-
Noise Free Resolution: 18-bits
General Description
The 16-bit CS5525 and the 20-bit CS5526 are highly in-
tegrated
鈭單?/div>
A/D converters which include an
instrumentation amplifier, a PGA (programmable gain
amplifier), eight digital filters, and self and system cali-
bration circuitry.
The converters are designed to provide their own nega-
tive supply which enables their on-chip instrumentation
amplifiers to measure bipolar ground-referenced signals
鈮ぢ?00
mV. By directly supplying NBV with -2.5 V and
with VA+ at 5 V,
卤
2.5 V signals (with respect to ground)
can be measured.
The digital filters provide programmable output update
rates between 3.76 Hz to 202 Hz (XIN = 32.768 kHz).
Output word rates can be increased by approximately 3X
by using XIN = 100 kHz. Each filter is designed to settle
to full accuracy for its output update rate in one conver-
sion cycle. The filters with word rates of 15 Hz or less
(XIN = 32.768 kHz) reject both 50 and 60 Hz (
卤
3 Hz) line
interference simultaneously.
Low power, single conversion settling time, programma-
ble output rates, and the ability to handle negative input
signals make these single supply products ideal solu-
tions for isolated and non-isolated applications.
ORDERING INFORMATION
See page26.
Bipolar/Unipolar Input Ranges
-
25 mV, 55 mV, 100 mV, 1 V, 2.5 V and 5 V
Chopper Stabilized Instrumentation Amplifier
On-Chip Charge Pump Drive Circuitry
4-Bit Output Latch
Simple three-wire serial interface
-
SPI鈩?and Microwire鈩?Compatible
-
Schmitt Trigger on Serial Clock (SCLK)
Programmable Output Word Rates
-
3.76 Hz to 202Hz (XIN = 32.768 kHz)
-
11.47 Hz to 616 Hz (XIN = 100 kHz)
Output Settles in One Conversion Cycle
Simultaneous 50/60 Hz Noise Rejection
System and Self-Calibration with
Read/Write Registers
Single +5 V Analog Supply
+3.0 V or +5 V Digital Supply
Low Power Mode Consumption: 4.9 mW
-
1.8 mW in 1 V, 2.5 V, and 5 V Input Ranges
VA+
AGND
VREF+
VREF-
DGND
VD+
AIN+
AIN-
+
X20
-
Programmable
Gain
Differential
4th Order
Delta-Sigma
Modulator
Digital Filter
Calibration
Register
CS
SCLK
NBV
A0
A1
A2
A3
Control
Register
SDI
Latch
Calibration
Memory
Calibration
碌
C
Clock
Gen.
Output
Register
SDO
CPD
XIN XOUT
Cirrus Logic, Inc.
www.cirrus.com
Copyright
铮?/div>
Cirrus Logic, Inc. 2003
(All Rights Reserved)
Nov 鈥?3
DS202F3
1

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