MAX9939 Maxim, MAX9939 Datasheet - Page 12

• Manufacturer Part Number: MAX9939
• Description: The MAX9939 is a general-purpose, differential-input programmable-gain amplifier (PGA) that is ideal for conditioning a variety of wide dynamic range signals such as those found in motor current-sense, medical instrumentation, and sonar data acquisit
• Manufacturer: Maxim

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