Rainbow-electronics MAX1273 Manuel d'utilisateur télécharger pdf

General Description

The MAX1272/MAX1273 multirange 12-bit data-acquisi-

tion systems (DAS) operate with a single 5V supply. The

software-programmable analog input accepts a variety

of voltage ranges: ±10V, ±5V, 0 to 10V, 0 to 5V for the

MAX1272; ±V

REF

, ±V

REF

/ 2, 0 to V

REF

, 0 to V

REF

/ 2 for

the MAX1273. The software-selectable extended analog

input range increases the effective dynamic range to 14

bits and provides the flexibility to interface 4–20mA pow-

ered sensors directly to a single 5V system. In addition,

the MAX1272 provides fault protection to ±12V. Other

features include a 5MHz track/hold (T/H) bandwidth,

87ksps throughput rate, and internal (4.096V) or external

(2.40V to 4.18V) reference.

The MAX1272/MAX1273 serial interfaces connect

directly to SPI™/QSPI™/MICROWIRE™-compatible

devices without any external logic.

Four software-programmable power-down modes

(delayed standby, immediate standby, delayed full power-

down, and immediate full power-down) provide low-cur-

rent shutdown between conversions. In standby mode, the

internal reference buffer remains active, thus eliminating

startup delay.

The MAX1272/MAX1273 are available in 8-pin PDIP

and µMAX packages. Both devices are available in the

commercial (0°C to +70°C) or extended (-40°C to

+85°C) temperature range.

Applications

Industrial Control Systems

Data-Acquisition Systems

Robotics

Automatic Testing

Battery-Powered Instruments

Medical Instruments

Features

♦ Four Software-Selectable Input Ranges

MAX1272: 0 to 10V, 0 to 5V, ±10V, ±5V

MAX1273: 0 to V

REF

, 0 to V

REF

/ 2, ±V

REF

±V

REF

/ 2

♦ 12-Bit Resolution, No Missing Codes

♦ 5V Single-Supply Operation

♦ SPI/QSPI/MICROWIRE-Compatible 3-Wire

Interface

♦ 87ksps Sampling Rate

♦ ±12V Fault-Protected Analog Input (MAX1272)

♦ Internal (4.096V) or External (2.4V to 4.18V)

Reference

♦ Low Power

1.5mA at 87ksps

0.4mA at 10ksps

0.2mA at 1ksps

♦ Four Power-Down Modes

♦ 8-Pin µMAX and PDIP Packages

MAX1272/MAX1273

Fault-Protected, 12-Bit ADCs

with Software-Selectable Input Range

________________________________________________________________ Maxim Integrated Products 1

REF

AINGND

DOUT

CSDIN

SCLK

PDIP/µMAX

TOP VIEW

MAX1272

MAX1273

Pin Configuration

Ordering Information

19-2921; Rev 0; 7/03

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART

TEMP

RANGE

PIN-

PACKAGE

INL

(LSB)

MAX1272CPA

0°C to +70°C 8 Plastic DIP

±1

MAX1272CUA

0°C to +70°C

8 µMAX ±1

MAX1272EPA

-40°C to +85°C 8 Plastic DIP

±1

MAX1272EUA

-40°C to +85°C

8 µMAX ±1

MAX1273CPA

0°C to +70°C 8 Plastic DIP

±1

MAX1273CUA

0°C to +70°C

8 µMAX ±1

MAX1273EPA

-40°C to +85°C 8 Plastic DIP

±1

MAX1273EUA

-40°C to +85°C

8 µMAX ±1

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

Typical Application Circuit appears at end of data sheet.

1 2 3 4 5 6 ... 19 20

Résumé du contenu

Page 1 - Fault-Protected, 12-Bit ADCs

General DescriptionThe MAX1272/MAX1273 multirange 12-bit data-acquisi-tion systems (DAS) operate with a single 5V supply. Thesoftware-programmable ana

Page 2

MAX1272/MAX1273Input Data FormatInput data (control byte) clocks in at DIN on the risingedge of SCLK. CS enables communication with theMAX1272/MAX1273

Page 3