MAX1284 View Datasheet(PDF) - Maxim Integrated

Part Name

Description

Manufacturer

MAX1284

400ksps/300ksps, Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference

Maxim Integrated 

19-1687; Rev 2; 12/10

EVAALVUAAILTAIOBNLEKIT

400ksps/300ksps, Single-Supply, Low-Power,

Serial 12-Bit ADCs with Internal Reference

General Description

The MAX1284/MAX1285 12-bit analog-to-digital con-

verters (ADCs) combine a high-bandwidth track/hold

(T/H), a serial interface with high conversion speed, an

internal +2.5V reference, and low power consumption.

The MAX1284 operates from a single +4.5V to +5.5V

supply. The MAX1285 operates from a single +2.7V to

+3.6V supply.

The 3-wire serial interface connects directly to

SPI™/QSPI™/ MICROWIRE™ devices without external

logic. The devices use an external serial-interface clock

to perform successive-approximation analog-to-digital

conversions.

Low power, ease of use, and small package size make

these converters ideal for remote-sensor and data-acqui-

sition applications or for other circuits with demanding

power consumption and space requirements. The

MAX1284/MAX1285 are available in 8-pin SO packages.

These devices are pin-compatible, higher-speed ver-

sions of the MAX1240/MAX1241. Refer to the respec-

tive data sheets for more information.

Applications

Portable Data Logging

Data Acquisition

Medical Instruments

Battery-Powered Instruments

Pen Digitizers

Process Control

____________________________Features

o Single-Supply Operation

+4.5V to +5.5V (MAX1284)

+2.7V to +3.6V (MAX1285)

o ±1LSB (max) DNL, ±1LSB (max) INL

o 400ksps Sampling Rate (MAX1284)

o Internal Track/Hold

o +2.5V Internal Reference

o Low Power: 2.5mA (400ksps)

o SPI/QSPI/MICROWIRE 3-Wire Serial-Interface

o Pin-Compatible, High-Speed Upgrades to

MAX1240/MAX1241

o 8-Pin SO Package

Ordering Information

PART

TEMP RANGE

PIN-

PACKAGE

SUPPLY

VOLTAGE (V)

MAX1284BCSA+ 0°C to +70°C 8 SO

5

MAX1284BESA+ -40°C to +85°C 8 SO

5

MAX1285BCSA+ 0°C to +70°C 8 SO

2.7 to 3.6

MAX1285BESA+ -40°C to +85°C 8 SO

2.7 to 3.6

+Denotes a lead(Pb)-free/RoHS-compliant package.

Pin Configuration

TOP VIEW

+

VDD 1

AIN 2

SHDN 3

REF 4

MAX1284

MAX1285

SO

8 SCLK

7 CS

6 DOUT

5 GND

CS 7

SCLK 8

SHDN 3

AIN 2

Functional Diagram

VDD

1

CONTROL

LOGIC

T/H

INT

CLOCK

12-BIT

SAR

OUTPUT

SHIFT

REGISTER

6 DOUT

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

4

REF

+2.5V REFERENCE

5

GND

MAX1284

MAX1285

________________________________________________________________ Maxim Integrated Products 1

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

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