Datasheet

MAX9939
SPI Programmable-Gain Amplifier
with Input V
OS
Trim and Output Op Amp
12
Maxim Integrated
R
I
A
V
CC
V
CC
/2
20kΩ
20kΩ
V
CC
V
CC
/2
20kΩ
20kΩ
LVL
V
CC
V
CC
/2
20kΩ
20kΩ
10kΩ
10kΩ
10kΩ
INA+
INA-
10kΩ
10kΩ
B
ADC
R
F
OUTA
INB
OUTB
ASIC
CS
DOUT
SCLK
SCLK
SPI REGISTERS
GND
DIN CS
0.1µF
1µF
V
CC
GAIN SHUTDOWN
INPUT
OFFSET-
VOLTAGE
TRIM
MAX9939
Figure 4. Using the MAX9939 as a Differential-Input, Differential-Output PGA
Chip Information
PROCESS: BiCMOS