2.7V to 3.6V and 4.5V to 5.5V, Low-Power,

4-/12-Channel, 2-Wire Serial, 12-Bit ADCs

8

_______________________________________________________________________________________

Pin Description

PIN

MAX1236

MAX1237

MAX1238

MAX1239

NAME

DESCRIPTION

1, 2, 3

1, 2, 3

AIN0–AIN2

—

4–8

AIN3–AIN7

—

16, 15, 14

AIN8–AIN10

Analog Inputs

4

—

AIN3/REF

Analog Input 3/Reference Input or Output. Selected in the setup

register (see Tables 1 and 6).

—

13

AIN11/REF

Analog Input 11/Reference Input or Output. Selected in the setup

register (see Tables 1 and 6).

5

9

SCL

Clock Input

6

10

SDA

Data Input/Output

7

11

GND

Ground

812

Positive Supply. Bypass to GND with a 0.1µF capacitor.

S

Sr

A

SCL

SDA

PS

S

Sr

A

SCL

SDA

S

HS-MODE

F/S-MODE

A. F/S-MODE 2-WIRE SERIAL INTERFACE TIMING

B. HS-MODE 2-WIRE SERIAL INTERFACE TIMING

t

P

Figure 1. 2-Wire Serial Interface Timing