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Cirrus Logic CS5571 User Manual

Cs5571, Preliminary product information, Features & description

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Preliminary Product Information

This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.

Copyright

© Cirrus Logic, Inc. 2008

(All Rights Reserved)

http://www.cirrus.com

3/25/08

10:56

CS5571

±

2.5 V / 5 V, 100 kSps, 16-bit, High-throughput

∆Σ

ADC

Features

& Description

‰ Single-ended Analog Input

‰ On-chip Buffers for High Input Impedance

‰ Conversion Time = 10

µS

‰ Settles in One Conversion

‰ Linearity Error = 0.0008%

‰ Signal-to-Noise = 92 dB

‰ S/(N + D) = 91 dB

‰ DNL = ±0.1 LSB Max.

‰ Simple three/four-wire serial interface

‰ Power Supply Configurations:

- Analog: +5V/GND; IO: +1.8V to +3.3V

- Analog: ±2.5V; IO: +1.8V to +3.3V

‰ Power Consumption:

- ADC Input Buffers On: 85 mW

- ADC Input Buffers Off: 60 mW

General Description

The CS5571 is a single-channel, 16-bit analog-to-digital
converter capable of 100 kSps conversion rate. The input
accepts a single-ended analog input signal. On-chip buff-
ers provide high input impedance for both the AIN input
and the VREF+ input. This significantly reduces the drive
requirements of signal sources and reduces errors due to
source impedances. The CS5571 is a delta-sigma convert-
er capable of switching multiple input channels at a high
rate with no loss in throughput. The ADC uses a low-laten-
cy digital filter architecture. The filter is designed for fast
settling and settles to full accuracy in one conversion. The
converter's 16-bit data output is in serial format, with the
serial port acting as either a master or a slave. The convert-
er is designed to support bipolar, ground-referenced
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 logic
operating from 1.8, 2.5, or 3.3 V.

ORDERING INFORMATION:

See

Ordering Information

on page 34.

AIN

ACOM

CS

SCLK

SMODE

VREF+

VREF-

RDY

OSC/CLOCK

GENERATOR

CONV

BP/UP

DIGITAL CONTROL

SERIAL

INTERFACE

ADC

DIGITAL

FILTER

LOGIC

VL

MCLK

SDO

RST

DITHER

DCR

VLR

V1-

V2-

BUFEN

V2+

V1+

CS5571

TST

VLR2

MAR ‘08

DS768PP1