General Description

The MAX11638/MAX11639/MAX11642/MAX11643 are

serial 8-bit analog-to-digital converters (ADCs) with an

internal reference. These devices feature on-chip FIFO,

scan mode, internal clock mode, internal averaging,

and AutoShutdown™. The maximum sampling rate is

300ksps using an external clock. The MAX11642/

MAX11643 have 16 input channels and the MAX11638/

MAX11639 have 8 input channels. These four devices

operate from either a +3V supply or a +5V supply, and

ble serial port.

The MAX11638/MAX11639 are available in 16-pin

QSOP packages. The MAX11642/MAX11643 are avail-

able in 24-pin QSOP packages. All four devices are

specified over the extended -40°C to +85°C tempera-

ture range.

Applications

System Supervision

Data-Acquisition Systems

Industrial Control Systems

Patient Monitoring

Data Logging

Instrumentation

Features

o Analog Multiplexer with Track-and-Hold (T/H)

16 Channels (MAX11642/MAX11643)

8 Channels (MAX11638/MAX11639)

o Single Supply

2.7V to 3.6V (MAX11639/MAX11643)

4.75V to 5.25V (MAX11638/MAX11642)

o Internal Reference

2.5V (MAX11639/MAX11643)

4.096V (MAX11638/MAX11642)

o 16-Entry First-In/First-Out (FIFO)

o Scan Mode, Internal Averaging, and Internal Clock

o Accuracy: ±1 LSB INL, ±1 LSB DNL, No Missing

Codes Over Temperature

o 10MHz 3-Wire SPI-/QSPI-/MICROWIRE-Compatible

Interface

o Small Packages

16-Pin QSOP (MAX11638/MAX11639)

24-Pin QSOP (MAX11642/MAX11643)

8-Bit, 16-/8-Channel, 300ksps ADCs

with FIFO and Internal Reference

________________________________________________________________

Maxim Integrated Products

1

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

AIN0

TOP VIEW

EOC

DOUT

DIN

CS

SCLK

GND

REF

MAX11638

MAX11639

QSOP

AIN1

AIN2

AIN5

AIN3

AIN4

AIN6

CNVST/AIN7

+

Pin Configurations

19-6035; Rev 0; 9/11

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.

EVALUATION

KIT

AVAILABLE

Ordering Information

PART

NUMBER

OF

INPUTS

SUPPLY

VOLTAGE

RANGE (V)

PIN

PACKAGE

MAX11638EEE+T

8

4.75 to 5.25

16 QSOP

MAX11639EEE+T

8

2.7 to 3.6

16 QSOP

MAX11642EEG+T

16

4.75 to 5.25

24 QSOP

MAX11643EEG+T

16

2.7 to 3.6

24 QSOP

Pin Configurations continued at end of data sheet.

AutoShutdown is a trademark of Maxim Integrated Products, Inc.

QSPI is a trademark of Motorola, Inc.

MICROWIRE is a registered trademark of National

Semiconductor Corp.

Note: All devices are specified over the -40°C to +85°C operating

temperature range.

+

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

T = Tape and reel.