_______________General Description

The MAX113/MAX117 are microprocessor-compatible,

8-bit, 4-channel and 8-channel analog-to-digital con-

verters (ADCs). They operate from a single +3V supply

and use a half-flash technique to achieve a 1.8µs con-

version time (400ksps). A power-down pin (

PWRDN)

reduces current consumption to 1µA typical. The

devices return from power-down mode to normal oper-

ating mode in less than 900ns, allowing large supply-

current reductions in burst-mode applications. (In burst

mode, the ADC wakes up from a low-power state at

specified intervals to sample the analog input signals.)

Both converters include a track/hold, enabling the ADC

to digitize fast analog signals.

Microprocessor (µP) interfaces are simplified because

the ADC can appear as a memory location or I/O port

without external interface logic. The data outputs use

latched, three-state buffer circuitry for direct connection

to an 8-bit parallel µP data bus or system input port.

The MAX113/MAX117 input/reference configuration

enables ratiometric operation.

The 4-channel MAX113 is available in a 24-pin DIP or

SSOP. The 8-channel MAX117 is available in a 28-pin

DIP or SSOP. For +5V applications, refer to the

MAX114/MAX118 data sheet.

________________________Applications

Battery-Powered Systems

Portable Equipment

System-Health Monitoring

Remote Data Acquisition

Communications Systems

____________________________Features

o +3.0V to +3.6V Single-Supply Operation

o 4 (MAX113) or 8 (MAX117) Analog Input Channels

o Low Power: 1.5mA (operating mode)

1µA (power-down mode)

o Total Unadjusted Error

≤ 1LSB

o Fast Conversion Time: 1.8µs per Channel

o No External Clock Required

o Internal Track/Hold

o Ratiometric Reference Inputs

o Internally Connected 8th Channel Monitors

Reference Voltage (MAX117)

+3V, 400ksps, 4/8-Channel,

8-Bit ADCs with 1µA Power-Down

________________________________________________________________

Maxim Integrated Products

1

4-BIT

DAC

4-BIT

FLASH

ADC

(4MSBs)

4-BIT

FLASH

ADC

(4LSBs)

TIMING AND

CONTROL

ADDRESS

LATCH

DECODE

REF+

16

THREE-

STATE

OUTPUT

DRIVERS

D7

D6

D5

D4

D3

D2

D1

D0

MUX

*IN7

*IN8

Σ

REF+

*IN6

*IN5

IN4

IN3

IN2

IN1

A0

A1

A2

REF-

PWRDN

RD

MODE

INT

WR/RDY

CS

MAX113/MAX117

*MAX117 ONLY

_________________________________________________________Functional Diagram

19-1081; Rev 1; 8/96

PART

MAX113CNG

MAX113CAG

MAX113C/D

0°C to +70°C

0°C to +70°C

0°C to +70°C

TEMP. RANGE

PIN-PACKAGE

24 Narrow Plastic DIP

24 SSOP

Dice*

______________Ordering Information

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800

MAX113ENG

MAX113EAG

MAX113MRG

-55°C to +125°C

-40°C to +85°C

-40°C to +85°C

24 Narrow Plastic DIP

24 SSOP

24 Narrow CERDIP**

Ordering Information continued at end of data sheet.

**Contact factory for availability.

Pin Configuration appears at end of data sheet.