Cirrus Logic CS5566 - Manual

Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Copyright  Cirrus Logic, Inc. 2009
(All Rights Reserved)
http://www.cirrus.com
5/4/09
CS5566
± 2.5 V / 5 V, 5 kSps, 24-bit
ΔΣ
ADC
Features & Description
 Differential Analog Input
 On-chip Buffers for High Input Impedance
 Conversion Time = 200 μS
 Settles in One Conversion
 Linearity Error = 0.0005%
 Signal-to-Noise = 110 dB
 24 Bits, No Missing Codes
 Simple three/four-wire serial interface
 Power Supply Configurations:
- Analog: +5V/GND; IO: +1.8V to +3.3V
- Analog: ±2.5V; IO: +1.8V to +3.3V
 Power Consumption: 20 mW @ 5 kSps
General Description
The CS5566 is a single-channel, 24-bit analog-to-digital
converter capable of 5 kSps conversion rate. The input
accepts a fully differential analog input signal. On-chip
buffers provide high input impedance for both the AIN in-
puts and the VREF+ input. This significantly reduces the
drive requirements of signal sources and reduces errors
due to source impedances. The CS5566 is a delta-sigma
converter capable of switching multiple input channels at
a high rate with no loss in throughput. The ADC uses a
low-latency digital filter architecture. The filter is designed
for fast settling and settles to full accuracy in one conver-
sion. The converter's 24-bit data output is in serial form,
with the serial port acting as either a master or a slave. The
converter is designed to support bipolar, ground-refer-
enced signals when operated from ±2.5V analog supplies.
The converter can operate from an analog supply of 0-5V
or from ±2.5V. The digital interface supports standard log-
ic operating from 1.8, 2.5, or 3.3 V.
ORDERING INFORMATION:
See Ordering Information on page 30.
AI N +
A I N -
CS
SCLK
SMODE
VREF+
VREF-
RDY
OSC/CLOCK
GENERATOR
CONV
BP/UP
DIGITAL CONTROL
SERIAL
INTERFACE ADC
DIGITAL
FILTER
LOGIC
VL
MCLK
SDO
RST
SLEEP
TST DCR V1- V2-
BUFEN
V2+ V1+
CS5566
VLR VLR2
MAY ‘09
DS806PP2