CS5529 Datasheet, PDF (1/30 Pages) Cirrus Logic – 16 BIT PROGRAMMABLE ADC WITH 6 BIT LATCH

CS5529
16-Bit, Programmable ∆Σ ADC with 6-Bit Latch
Features
General Description
l Delta-Sigma Analog-to-Digital Converter
- Linearity Error: 0.0015%FS
- Noise Free Resolution: 16-Bits
l 2.5 V Bipolar/Unipolar Buffered Input Range
l 6-Bit Output Latch
l Eight Digital Filters
- Selectable Output Word Rates
- Output Settles in One Conversion Cycle
- 50/60 Hz ±3 Hz Simultaneous Rejection
l Simple three-wire serial interface
- SPI™ and Microwire™ Compatible
- Schmitt Trigger on Serial Clock (SCLK)
l System/Self-Calibration with R/W Registers
l Power Supply Configurations
- VA+ = +5 V; VA- = 0 V; VD+ = +3 V to +5 V
- VA+ = +2.5 V; VA- = -2.5 V; VD+ = +3 V to +5 V
l Low Power Consumption: 2.5 mW
The 16-bit CS5529 is a low-power programmable ∆Σ An-
alog-to-Digital Converter (ADC) which includes
coarse/fine charge buffers, a fourth order ∆Σ modulator,
a calibration microcontroller, a digital filter with program-
mable decimation rates, a 6-bit output latch, and a three-
wire serial interface. The ADC is designed to operate
from single or dual analog supplies and a single digital
supply.
The digital filter is programmable with output update
rates between 1.88 Hz to 101 Hz. These output rates are
specified for XIN = 32.768 kHz. Output word rates can be
increased by approximately 3X by using XIN = 100 kHz.
The filter is designed to settle to full accuracy for the se-
lected output word rate in one conversion. When
operated at word rates of 15 Hz or less, the filter rejects
both 50 Hz and 60 Hz simultaneously.
Low power, single conversion settling time, programma-
ble output rates, and the ability to handle negative input
signals make this single or dual supply product an ideal
solution for isolated and non-isolated applications.
ORDERING INFORMATION
See page 27.
AIN+
AIN-
VREF+
VREF-
VA+ VA-
1X
1X
Differential
4th Order
Delta-Sigma
Modulator
Latch
A0 A1 D0 D1 D2 D3
Calibration
Memory
DGND
Digital Filter
VD+
Calibration
Register
Calibration µC
Clock
Gen.
Control
Register
Output
Register
XIN XOUT
CS
SCLK
SDI
SDO
Cirrus Logic, Inc.
Crystal Semiconductor Products Division
P.O. Box 17847, Austin, Texas 78760
[phone] FAX: [phone]
http://www.crystal.com
Copyright © Cirrus Logic, Inc. 1999
(All Rights Reserved)
MAR ‘99
DS246F1
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