Cirrus Logic CS5509 - Manual

1
Copyright  Cirrus Logic, Inc. 2009
(All Rights Reserved)
http://www.cirrus.com
CS5509
Single-supply, 16-bit A/D Converter
Features
 Delta-sigma A/D Converter
- 16-bit, No Missing Codes
- Linearity Error: ±0.0015%FS
 Differential Input
- Pin-selectable Unipolar/Bipolar Ranges
- Common Mode Rejection
105 dB @ dc
120 dB @ 50, 60 Hz
 Either 5V or 3.3V Digital Interface
 On-chip Self-calibration Circuitry
 Output Update Rates up to 200/second
 Ultra Low Power: 1.7 mW
Description
The CS5509 is a single-supply, 16-bit, serial-output
CMOS A/D converter. The CS5509 uses charge-bal-
anced (delta-sigma) techniques to provide low-cost,
high-resolution measurements at output word rates up to
200 samples per second.
The on-chip digital filter offers superior line rejection at
50Hz and 60Hz when the device is operated from a
32.768 kHz clock (output word rate = 20 Sps).
The CS5509 has on-chip self-calibration circuitry which
can be initiated at any time or temperature to ensure
minimum offset and full-scale errors.
Low power, high resolution, and small package size
make the CS5509 an ideal solution for loop-powered
transmitters, panel meters, weigh scales, and battery
powered instruments.
ORDERING INFORMATION
CS5509-ASZ -40 °C to +85 °C 16-pin SOIC Lead Free
I
Differential
4th order
delta-sigma
modulator
VD+
13
VA+ VREF+
9
VREF-
10
AIN-
8
AIN+
7
Calibration
SRAM
Serial
Interface
Logic
Digital
Filter
XIN
4
XOUT
5
CONV
2
Calibration µC
OSC
CAL
3
6
BP/UP
CS
1
DRDY
16
SDATA
15
SCLK
14
11
GND
12
SEP ‘09
DS125F3