CS5524ASZ Cirrus Logic, Inc., CS5524ASZ Datasheet

CS5524ASZ

Manufacturer Part Number

CS5524ASZ

Description

SSOP24

Manufacturer

Cirrus Logic, Inc.

Datasheet

1.CS5524AS.pdf (56 pages)

Specifications of CS5524ASZ

Date_code

09+

Current page: 1 of 56
Download datasheet (794Kb)

Features

http://www.cirrus.com

Low Input Current (100 pA), Chopper-

stabilized Instrumentation Amplifier

Scalable Input Span (Bipolar/Unipolar)

- 2.5V VREF: 25 mV, 55 mV, 100 mV, 1 V,

- External: 10 V, 100 V

Wide V

Fourth Order Delta-Sigma A/D Converter

Easy to Use Three-wire Serial Interface Port

- Programmable/Auto Channel Sequencer with

- Accessible Calibration Registers per Channel

- Compatible with SPI™ and Microwire

System and Self Calibration

Eight Selectable Word Rates

- Up to 617 Sps (XIN = 200 kHz)

- Single Conversion Settling

- 50/60 Hz ±3 Hz Simultaneous Rejection

Single +5 V Power Supply Operation

- Charge Pump Drive for Negative Supply

- +3 to +5 V Digital Supply Operation

Low Power Consumption: 6.0 mW

2.5V, 5 V

Conversion Data FIFO

AIN1+

AIN2+

AIN3+

AIN4+

AIN1-

AIN2-

AIN3-

AIN4-

REF

NBV

16-bit or 24-bit, 2/4/8-channel ADCs with PGIA

Input Range (+1 to +5 V)

CS5524

Shown

MUX

CPD

X20

A0 A1

Latch

VA+

XIN XOUT

AGND

Clock

Gen.

VREF+ VREF-

Differential

Modulator

∆Σ

Order

Calibration Registers

General Description

The CS5521/22/23/24/28 are highly integrated ∆Σ ana-

log-to-digital converters (ADCs) which use charge-

balance techniques to achieve 16-bit (CS5521/23) and

24-bit (CS5522/24/28) performance. The ADCs come as

either

(CS5523/24), or eight-channel (CS5528) devices and

include a low-input-current, chopper-stabilized instru-

mentation amplifier. To permit selectable input spans of

25 mV, 55 mV, 100 mV, 1 V, 2.5 V, and 5 V, the ADCs

include a PGA (programmable gain amplifier). To ac-

commodate ground-based thermocouple applications,

the devices include a charge pump drive which provides

a negative bias voltage to the on-chip amplifiers.

These devices also include a fourth-order ∆Σ modulator

followed by a digital filter which provides eight selectable

output word rates. The digital filters are designed to settle

to full accuracy within one conversion cycle and when

operated at word rates below 30 Sps, they reject both

50 Hz and 60 Hz interference.

These single-supply products are ideal solutions for

measuring isolated and non-isolated, low-level signals in

process control applications.

ORDERING INFORMATION

Data FIFO &

See page 52.

Digital Filter

two-channel

CS5521/22/23/24/28

DGND

Setup Registers,

Channel Scan

Controller,

(CS5521/22),

Serial Port

VD+

Logic

Interface

four-channel

SCLK

SDI

SDO

DS317F4

AUG ‘05

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