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CS5525 Datenblatt(PDF) 1 Page - Cirrus Logic

Teilenummer CS5525
Bauteilbeschribung  16-bit/20-bit, Multi-range ADC with 4-bit Latch
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Hersteller  CIRRUS [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS5525 Datenblatt(HTML) 1 Page - Cirrus Logic

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Copyright
© Cirrus Logic, Inc. 2005
(All Rights Reserved)
http://www.cirrus.com
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
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™ and Microwire™ Compatible
- Schmitt Trigger on Serial Clock (SCLK)
Programmable Output Word Rates
- 3.76 Sps to 202 Sps (XIN = 32.768 kHz)
- 11.47 Sps to 616 Sps (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
General Description
The 16-bit CS5525 and the 20-bit CS5526 are highly in-
tegrated
∆Σ 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
≤±100 mV. By directly supplying NBV with -2.5 V and
with VA+ at 5 V, ±2.5 V signals (with respect to ground)
can be measured.
The digital filters provide programmable output update
rates between 3.76 Sps to 202 Sps (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 Sps or less
(XIN = 32.768 kHz) reject both 50 and 60 Hz (±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 page 29.
AIN+
AIN-
+
-
X20
Programmable
Gain
VA+
AGND
VREF+
VREF-
VD+
DGND
XIN XOUT
SDO
SDI
NBV
A0
A1
A2
A3
Latch
Differential
Digital Filter
Calibration
Register
Control
Register
Output
Register
4th Order
Delta-Sigma
Modulator
Calibration
Memory
Calibration
µC
Clock
Gen.
SCLK
CS
CPD
AUG ‘05
DS202F5


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