Datasheet

MAX1236–MAX1239
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
812V
DD
Positive Supply. Bypass V
DD
to GND with a 0.1µF capacitor as close
as possible to the device.
t
HD.STA
t
SU.DAT
t
HIGH
t
R
t
F
t
HD.DAT
t
HD.STA
S
Sr
A
SCL
SDA
t
SU.STA
t
LOW
t
BUF
t
SU.STO
PS
t
HD.STA
t
SU.DAT
t
HIGH
t
FCL
t
HD.DAT
t
HD.STA
S Sr A
SCL
SDA
t
SU.STA
t
LOW
t
BUF
t
SU.STO
S
t
RCL
t
RCL1
HS-MODE F/S-MODE
A. F/S-MODE 2-WIRE SERIAL INTERFACE TIMING
B. HS-MODE 2-WIRE SERIAL INTERFACE TIMING
t
FDA
t
RDA
t
t
R
t
F
P
Figure 1. 2-Wire Serial Interface Timing