MAX9934FART+TG0Y Maxim Integrated, MAX9934FART+TG0Y Datasheet - Page 13

• Manufacturer Part Number: MAX9934FART+TG0Y
• Description: Special Purpose Amplifiers
• Manufacturer: Maxim Integrated
• Series: MAX9934r

In Figure 5, V
outputs is zero. For positive input-sense voltages, the
MAX9934 sources current causing its output voltage to
rise above V
the MAX9934 sinks current causing its output voltage to
be lower than V
sensing.
Figure 5. Bidirectional Multiplexed Operation
Maxim Integrated
High-Precision, Low-Voltage, Current-Sense Amplifier
with Current Output and Chip Select for Multiplexing
BIAS
OUT
BIAS
. For negative input-sense voltages,
is equal to V
V
V
V
, thus allowing bidirectional current
IN1
IN2
IN3
-0.1V ≤ V
-0.1V ≤ V
-0.1V ≤ V
CM
CM
CM
BIAS
≤ 5.5V
≤ 5.5V
≤ 5.5V
when the sum of all
R
R
R
I
I
I
SENSE
LOAD1
LOAD2
LOAD3
SENSE
SENSE
R
OUT
=
R
2
MAX9934
MAX9934
MAX9934
V
V
V
CC
CC
CC
= 3.3V
= 3.3V
= 3.3V
Since the ADC reference voltage, V
full-scale reading, a common choice for V
V
simple resistor-divider from V
V
parallel combination of the two resistors. For example, if
two equal value resistors, R, are used to generate a
V
gain calculation is R
CS
CS
CS
REF
BIAS
BIAS
/2. The current output makes it possible to use a
10kΩ
. The output resistance for gain calculation is the
V
OUT3
OUT1
OUT2
OUT
= V
R
TO EXTERNAL
REF
REFERENCE
VOLTAGE
10kΩ
/2, the output termination resistance for
R
(OPTIONAL)
CS1
CS2
CS3
V
OUT
REF
MICROCONTROLLER
= R/2. See Figure 5.
ADC
REF
MAX9934
to GND to generate
REF
, determines the
BIAS
13
is