CS5509 Datasheet, PDF (1/23 Pages) Cirrus Logic – SINGLE SUPPLY 16BIT A/D CONVERTER

CS5509
Single-supply, 16-bit A/D Converter
Features
z Delta-sigma A/D Converter
- 16-bit, No Missing Codes
- Linearity Error: ±0.0015%FS
z Differential Input
- Pin-selectable Unipolar/Bipolar Ranges
- Common Mode Rejection
105 dB @ dc
120 dB @ 50, 60 Hz
z Either 5V or 3.3V Digital Interface
z On-chip Self-calibration Circuitry
z Output Update Rates up to 200/second
z Ultra Low Power: 1.7 mW
I
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-AP -40 °C to +85 °C
CS5509-AS -40 °C to +85 °C
CS5509-ASZ -40 °C to +85 °C
16-pin PDIP
16-pin SOIC
16-pin SOIC Lead Free
AIN+ ⁷
AIN- ⁸
VREF+
9
VREF-
10
Differential
4th order
delta-sigma
modulator
VA+
GND
11
12
Digital
Filter
VD+
13
Serial
Interface
Logic
Calibration
SRAM
Calibration µC
OSC
2
4
5
CONV XIN XOUT
1 _CS
14 _SCLK
15 _SDATA
16 _DRDY
3 _CAL
6 _BP/UP
http://www.cirrus.com
Copyright © Cirrus Logic, Inc. 2005
(All Rights Reserved)
AUG ‘05
DS125F2
1