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MAX144BC/D

+2.7V, Low-Power, 2-Channel, 108ksps, Serial 12-Bit ADCs in 8-Pin µMAX

Maxim Integrated 

19-1387; Rev 2; 10/05

+2.7V, Low-Power, 2-Channel, 108ksps,

Serial 12-Bit ADCs in 8-Pin µMAX

General Description

The MAX144/MAX145 low-power, 12-bit analog-to-

digital converters (ADCs) are available in 8-pin µMAX®

and DIP packages. Both devices operate with a single

+2.7V to +5.25V supply and feature a 7.4µs succes-

sive-approximation ADC, automatic power-down, fast

wake-up (2.5µs), an on-chip clock, and a high-speed,

3-wire serial interface.

Power consumption is only 3.2mW (VDD = +3.6V) at the

maximum sampling rate of 108ksps. At slower through-

put rates, the automatic shutdown (0.2µA) further

reduces power consumption.

The MAX144 provides 2-channel, single-ended opera-

tion and accepts input signals from 0 to VREF. The

MAX145 accepts pseudo-differential inputs ranging

from 0 to VREF. An external clock accesses data-

through the 3-wire serial interface, which is SPI™,

QSPI™, and MICROWIRE™-compatible.

Excellent dynamic performance and low power, com-

bined with ease of use and small package size, make

these converters ideal for battery-powered and data-

acquisition applications, or for other circuits with

demanding power-consumption and space require-

ments. For pin-compatible 10-bit ADCs, see the

MAX157 and MAX159 data sheets.

Applications

Battery-Powered Systems Instrumentation

Portable Data Logging

Test Equipment

Isolated Data Acquisition Medical Instruments

Process-Control Monitoring System Supervision

Pin Configuration

TOP VIEW

VDD 1

CH0 (CH+) 2

CH1 (CH-) 3

GND 4

MAX144

MAX145

8 SCLK

7 DOUT

6 CS/SHDN

5 REF

( ) ARE FOR MAX145 ONLY µMAX/DIP

µMAX is a registered trademark of Maxim Integrated Products, Inc.

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

Features

♦ Single-Supply Operation (+2.7V to +5.25V)

♦ Two Single-Ended Channels (MAX144) One

Pseudo-Differential Channel (MAX145)

♦ Low Power

0.9mA (108ksps, +3V Supply)

100µA (10ksps, +3V Supply)

10µA (1ksps, +3V Supply)

0.2µA (Power-Down Mode)

♦ Internal Track/Hold

♦ 108ksps Sampling Rate

♦ SPI/QSPI/MICROWIRE-Compatible 3-Wire Serial

Interface

♦ Space-Saving 8-Pin µMAX Package

♦ Pin-Compatible 10-Bit Versions Available

Ordering Information

PART

TEMP PIN-

RANGE PACKAGE

INL PKG

(LSB) CODE

MAX144ACUA

MAX144BCUA

MAX144ACPA

MAX144BCPA

MAX144BC/D

MAX144AEUA

MAX144BEUA

MAX144AEPA

MAX144BEPA

MAX144AMJA

MAX144BMJA

0°C to

+70°C

0°C to

+70°C

0°C to

+70°C

0°C to

+70°C

0°C to

+70°C

-40°C to

+85°C

-40°C to

+85°C

-40°C to

+85°C

-40°C to

+85°C

-55°C to

+125°C

-55°C to

+125°C

8 µMAX

8 µMAX

8 Plastic DIP

8 Plastic DIP

Dice*

8 µMAX

8 µMAX

8 Plastic DIP

8 Plastic DIP

8 CERDIP**

8 CERDIP**

±0.5

±1

±0.5

±1

±1

±0.5

±1

±0.5

±1

±0.5

±1

U8-1

U8-1

P8-1

P8-1

—

U8-1

U8-1

P8-1

P8-1

J8-2

J8-2

*Dice are specified at TA = +25°C, DC parameters only.

**Contact factory for availability.

Ordering Information continued at end of data sheet.

________________________________________________________________ Maxim Integrated Products 1

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.

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