CS5560_09 Datasheet, PDF (1/32 Pages) Cirrus Logic – ±2.5 V / 5 V, 50 kSps, 24-bit, High-throughput ΔΣ ADC

5/4/09
CS5560
±2.5 V / 5 V, 50 kSps, 24-bit, High-throughput ΔΣ ADC
Features & Description
 Differential Analog Input
 On-chip Buffers for High Input Impedance
 Conversion Time = 20 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: +5 V / GND; IO: +1.8 V to +3.3 V
- Analog: ±2.5 V; IO: +1.8 V to +3.3 V
 Power Consumption:
- ADC Input Buffers On: 90 mW
- ADC Input Buffers Off: 60 mW
General Description
The CS5560 is a single-channel, 24-bit analog-to-digital
converter capable of 50 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 CS5560 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 32.
V1+
V2+
VREF+
VREF-
AIN+
AIN-
ADC
CS5560
DIGITAL
FILTER
LOGIC
VL
SERIAL
INTERFACE
SMODE
CS
SCLK
SDO
RDY
BUFEN
OSC/CLOCK
GENERATOR
DIGITAL CONTROL
SLEEP
RST
CONV
BP/UP
MCLK
V1-
V2-
TST
DCR VLR
VLR2
Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
http://www.cirrus.com
Copyright  Cirrus Logic, Inc. 2009
(All Rights Reserved)
MAY ‘09
DS713PP2