________________General Description

The MAX115/MAX116 are high-speed, multichannel,

12-bit data-acquisition systems (DAS) with simultane-

ous track/holds (T/Hs). These devices contain a 12-bit,

2µs, successive-approximation analog-to-digital con-

verter (ADC), a +2.5V reference, a buffered reference

input, and a bank of four simultaneous-sampling T/H

amplifiers that preserve the relative phase information

of the sampled inputs. The MAX115/MAX116 have two

multiplexed inputs for each T/H, allowing a total of eight

inputs. In addition, the converter is overvoltage tolerant

to ±17V. A fault condition on any channel will not dam-

age the IC. Available input ranges are ±5V (MAX115)

and ±2.5V (MAX116).

The parallel interface’s data access and bus release

timing specifications are compatible with most popular

digital signal processors and 16-bit/32-bit microproces-

sors. The MAX115/MAX116 conversion results can be

accessed without resorting to wait-states.

________________________Applications

Multiphase Motor Control

Power-Grid Synchronization

Power-Factor Monitoring

Digital Signal Processing

Vibration and Waveform Analysis

____________________________Features

o Four Simultaneous-Sampling T/H Amplifiers with

Two Multiplexed Inputs (Eight Single-Ended

Inputs Total)

o 2µs Conversion Time per Channel

o Throughput: 390ksps (1 Channel)

218ksps (2 Channels)

152ksps (3 Channels)

116ksps (4 Channels)

o Input Range: ± 5V (MAX115)

± 2.5V (MAX116)

o Fault-Protected Input Multiplexer (±17V)

o Internal +2.5V or External Reference Operation

o Programmable On-Board Sequencer

o High-Speed Parallel DSP Interface

o Internal 10MHz Clock

2x4-Channel, Simultaneous-Sampling

12-Bit ADCs

________________________________________________________________ Maxim Integrated Products

1

19-1928; Rev 0; 1/01

PART

MAX115CAX

0°C to +70°C

TEMP. RANGE

PIN-PACKAGE

36 SSOP

EVALUATION

KIT

AVAILABLE

Ordering Information

MAX115EAX

-40°C to +85°C

36 SSOP

MAX116CAX

0°C to +70°C

36 SSOP

MAX116EAX

-40°C to +85°C

36 SSOP

For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

36

35

34

33

32

31

30

29

28

27

26

25

24

23

1

2

3

4

5

6

7

8

9

10

11

12

13

14

AGND

CH3B

CH3A

CH4B

CH4A

A1

INT

CONVST

RD

WR

CS

CLK

A0

D6

D7

D8

D9

D10

D11 (MSB)

AGND

REFOUT

REFIN

CH1A

CH1B

CH2A

CH2B

SSOP

TOP VIEW

MAX115

MAX116

22

21

20

19

15

16

17

18

D3

D0/A2 (LSB)

D1/A3

D2

DGND

D4

D5

Pin Configuration

Typical Operating Circuit

A0

A1

D0/A2

D1/A3

D2

D3

D4

D5

D6

D7

D8

D9

D10

D11

CH1A

CH1B

CH2A

CH2B

CH3A

CH3B

CH4A

CH4B

MAX115

MAX116

CONVST

CONTROL INTERFACE

CLK

REFOUT

DGND

AGND

REFIN

4.7

µF

16MHz

0.1

µF

0.1

µF

-5V

0.1

µF

+5V

0.1

µF

+5V

INT

CS

RD

WR