General Description

The MAX1265/MAX1267 low-power, 12-bit analog-to-

digital converters (ADCs) feature a successive-approxi-

mation ADC, automatic power-down, fast wake-up

(2µs), an on-chip clock, +2.5V internal reference, and a

high-speed 12-bit parallel interface. They operate with

a single +2.7V to +3.6V analog supply.

Power consumption is only 5.4mW at the maximum

sampling rate of 265ksps. Two software-selectable

power-down modes enable the MAX1265/MAX1267 to

be shut down between conversions; accessing the par-

allel interface returns them to normal operation.

Powering down between conversions can reduce sup-

ply current below 10µA at lower sampling rates.

Both devices offer software-configurable analog inputs

for unipolar/bipolar and single-ended/pseudo-differen-

tial operation. In single-ended mode, the MAX1265 has

six input channels and the MAX1267 has two (three

input channels and one input channel, respectively,

when in pseudo-differential mode).

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 demand-

ing power-consumption and space requirements. The

MAX1265 is offered in a 28-pin QSOP package, while the

MAX1267 comes in a 24-pin QSOP. For pin-compatible

+5V, 12-bit versions, refer to the MAX1266/MAX1268

data sheet.

Applications

Industrial Control Systems

Data Logging

Energy Management

Patient Monitoring

Data-Acquisition Systems

Touch Screens

Features

o 12-Bit Resolution, ±0.5 LSB Linearity

o +3V Single-Supply Operation

o Internal +2.5V Reference

o Software-Configurable Analog Input Multiplexer

6-Channel Single Ended/

3-Channel Pseudo Differential (MAX1265)

2-Channel Single Ended/

1-Channel Pseudo Differential (MAX1267)

o Software-Configurable Unipolar/Bipolar

Analog Inputs

o Low Current

1.9mA (265ksps)

1.0mA (100ksps)

400µA (10ksps)

2µA (Shutdown)

o Internal 3MHz Full-Power Bandwidth Track/Hold

o Parallel 12-Bit Interface

o Small Footprint

28-Pin QSOP (MAX1265)

24-Pin QSOP (MAX1267)

265ksps, +3V, 6-/2-Channel, 12-Bit ADCs

with +2.5V Reference and Parallel Interface

________________________________________________________________ Maxim Integrated Products

1

19-2721; Rev 0; 04/03

28 QSOP

±1

0°C to +70°C

MAX1265BCEI

INL

(LSB)

±0.5

28 QSOP

PIN-PACKAGE

TEMP RANGE

0°C to +70°C

MAX1265ACEI

PART

Ordering Information

Pin Configurations

Typical Operating Circuits appear at end of data sheet.

28

27

26

25

24

23

22

21

20

19

18

17

16

15

1

2

3

4

5

6

7

8

9

10

11

12

13

14

D10

D11

REF

REFADJ

GND

CS

COM

CH0

CH1

CH2

CH3

CH4

CH5

CLK

WR

RD

INT

D0

D1

D2

D3

D4

D5

D6

D7

D8

D9

QSOP

TOP VIEW

MAX1265

Pin Configurations continued at end of data sheet.

28 QSOP

±0.5

-40°C to +85°C

MAX1265AEEI

28 QSOP

±1

-40°C to +85°C

MAX1265BEEI

24 QSOP

±0.5

-40°C to +85°C

MAX1267AEEG

24 QSOP

±1

-40°C to +85°C

MAX1267BEEG

24 QSOP

±1

0°C to +70°C

MAX1267BCEG

±0.5

24 QSOP

0°C to +70°C

MAX1267ACEG

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.