Cirrus Logic CS5550 - Manual

Copyright © Cirrus Logic, Inc. 2005
(All Rights Reserved) http://www.cirrus.com
CS5550
Two-channel, Low-cost A/D Converter
Features
z Power Consumption <12 mW
- with VD+ = 3.3 V
z Adjustable Input Range on AIN1 ±
z GND-referenced Signals with Single Supply
z On-chip 2.5 V Reference (25 ppm/°C typ)
z Simple Three-wire Digital Serial Interface
z Power Supply Configurations
VA+ = +5 V; AGND = 0 V; VD+ = +3.3 V to +5 V
Description
The CS5550 combines two
∆Σ ADCs and a serial
interface on a single chip. The CS5550 has
on-chip functionality to facilitate offset and gain
calibration. The CS5550 features a bi-directional
serial interface for communication with a
microcontroller.
ORDERING INFORMATION:
CS5550-IS -40 °C to +85°C 24-pin SSOP
CS5550-ISZ -40 °C to +85°C, Lead-free 24-pin SSOP
VA+ VD+
VREFIN
VREFOUT
AGND XIN XOUT CPUCLK DGND
CS
SDO
SDI
SCLK
INT
Voltage
Reference
Clock
Generator
Serial
Interface
x1
RESET
Digital
Filter
+
4th Order ∆Σ
Modulator
2nd Order
∆Σ
Modulator
Digital
Filter
AIN2+
AIN2-
AIN1+
AIN1-
Config
Register
Output
Registers
Calibration
Registers
-
+
-
10x,50x
10x
MAR ‘05
DS630F1