CS5541 Datasheet, PDF (1/26 Pages) Cirrus Logic – Low-power, High-Voltage, 24-Bit Delta-Sigma ADC

CS5541
Low-Power, Low-Voltage, 24-Bit ∆Σ ADC
Features
l ∆Σ Analog-to-Digital Converter
- Linearity Error: 0.0015% FS
- RMS Noise: 2 µV
l Two Channel Differential MUX
l Buffered, Fully Differential Analog and
Voltage Reference Inputs
l Scalable V_REF Input: 0.1 V to Analog Supply
l Absolute Accuracy via Calibration
l Flexible Digital Filters
- Single Conversion Settling at 13.4 SPS or 4
Conversion Settling at 53.7 SPS with
Simultaneous 50/60 Hz Rejection
- Single Conversion Settling at 64.8 SPS or Four
Conversion Settling at 260 SPS with 16-bit
Resolution
l Simple 3-Wire Serial Interface
- SPI^TM and Microwire^TM Compatible
- Schmitt Trigger on Serial Clock (SCLK)
l Low Power
- Single +3.0 V Supply
- 330 µA Operating; 10 µA Sleep Current
Description
The CS5541 is a 24-bit low-power and low-voltage ∆Σ
analog-to-digital converter (ADC). It is optimized to con-
vert analog signals in DC measurement applications,
such as temperature and pressure measurement, and
various portable devices where low-power consumption
is required.
To accommodate these applications, the ADC integrates
analog input and reference buffers for increased input
impedance and includes a two-channel multiplexer. Ab-
solute accuracy is achieved via one-time or continuous
calibration modes. The device draws less than 330µA.
The CS5541 includes two digital filters. The first filter,
which achieves simultaneous rejection of 50/60 Hz, pro-
vides single conversion settling at 13.4 SPS throughput
or four conversion settling at 53.7 SPS throughput. The
second filter, which achieves 16-bit performance, pro-
vides single conversion settling at 64.8 SPS throughput
or four conversion settling at 260 SPS throughput.
Low-power, low-voltage operation and an easy-to-con-
figure serial interface reduces time-to-market and makes
the CS5541 an ideal device for low-cost, power-con-
scious DC measurement applications.
ORDERING INFORMATION
CS5541-BS-40 ºC - +85 ºC
16-Pin SSOP
VA+
AIN1+
AIN1-
AIN2+
AIN2-
Input
Mux
VREF+
VREF-
OSC1 OSC2
X1
X1
X1
Differential
4th Order
∆Σ
Modulator
X1
Clock
Generator
Digital
Filter
VA-
VD+
Serial
Interface
Calibration
Register
Output
Register
DGND
CS
SDI
SDO
SCLK
Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
P.O. Box 17847, Austin, Texas 78760
[phone] FAX: [phone]
http://www.cirrus.com
Copyright  Cirrus Logic, Inc. 2000
(All Rights Reserved)
JUN ‘01
DS500PP1
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