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General Description

The MAX1106/MAX1107 low-power, 8-bit, single-channel,

analog-to-digital converters (ADCs) feature an internal

track/hold (T/H), voltage reference, clock, and serial inter-

face. The MAX1106 is specified from +2.7V to +3.6V and

consumes only 96µA. The MAX1107 is specified from

+4.5V to +5.5V and consumes only 107µA. The analog

inputs are pin-configurable, allowing unipolar and single-

ended or differential operation.

The full-scale analog input range is determined by the

internal reference of +2.048V (MAX1106) or +4.096V

(MAX1107), or by an externally applied reference rang-

a pin-selectable power-down mode that reduces power

consumption to 0.5µA when the device is not in use. The

3-wire serial interface directly connects to SPI™, QSPI™,

and MICROWIRE™ devices without external logic.

Conversions up to 25ksps are performed using the inter-

nal clock.

The MAX1106/MAX1107 are available in a 10-pin µMAX

package with a footprint that is just 20% of an

8-pin plastic DIP.

Applications

Portable Data Logging

Hand-Held Measurement Devices

Medical Instruments

System Diagnostics

Solar-Powered Remote Systems

4–20mA-Powered Remote Systems

Receive-Signal-Strength Indicators

Features

o Single Supply: +2.7V to +3.6V (MAX1106)

+4.5V to +5.5V (MAX1107)

o Low Power: 96µA at +3V and 25ksps

0.5µA in Power-Down Mode

o Pin-Programmable Configuration

o Internal Track/Hold

o Internal Reference: +2.048V (MAX1106)

+4.096V (MAX1107)

o SPI/QSPI/MICROWIRE-Compatible Serial Interface

o Small 10-Pin µMAX Package

Single-Supply, Low-Power,

Serial 8-Bit ADCs

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Maxim Integrated Products

1

1

2

3

4

5

10

9

8

7

6

SCLK

DOUT

SHDN

CONVST

GND

IN-

IN+

MAX1106

MAX1107

µMAX

TOP VIEW

REFIN

REFOUT

CONTROL

LOGIC

T/H

SAR

INTERNAL

OSCILLATOR

OUTPUT

SHIFT

REGISTER

ANALOG

INPUT

MUX

INTERNAL

REFERENCE

DOUT

SCLK

SHDN

IN+

REFIN

IN-

REFOUT

CONVST

GND

CHARGE

REDISTRIBUTION

DAC

MAX1106

MAX1107

Functional Diagram

19-1432; Rev 0; 3/99

Pin Configuration

Ordering Information

PART

MAX1106CUB

MAX1106EUB

-40°C to +85°C

0°C to +70°C

TEMP. RANGE

PIN-PACKAGE

10 µMAX

10 µMAX

MAX1107CUB

MAX1107EUB

-40°C to +85°C

0°C to +70°C

10 µMAX

10 µMAX

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.