Datasheet

MAX9934
High-Precision, Low-Voltage, Current-Sense Amplifier
with Current Output and Chip Select for Multiplexing
6
Maxim Integrated
Typical Operating Characteristics (continued)
(V
CC
= 3.3V, V
RS+
= V
RS-
= 3.0V, V
SENSE
= 0V, C
L
= 1000pF, R
OUT
= 10kΩ to GND for unidirectional operation, R
OUT
= 10kΩ to
V
CC
/2 for bidirectional operation. T
A
= +25°C, unless otherwise noted.)
-2.0
-0.5
-1.0
-1.5
0.5
0
1.5
1.0
2.0
V
OUT
vs. V
SENSE
V
REF
= 1.65V
MAX9934 toc10
V
SENSE
(mV)
V
OUT
- V
REF
(V)
-40 -20 0 20 40
GAIN = 25µA/mV
GAIN = 5µA/mV
BIDIRECTIONAL
V
OUT
vs. V
SENSE
(V
OUT
< 5mV)
MAX9934 toc11
V
SENSE
+ V
OS
(FV)
V
OUT
(mV)
80604020
1
2
3
4
5
0
0100
G = 25FA/mV
G = 5FA/mV
0
100
50
200
150
250
300
0 200 300100 400 500 600
V
OH
vs. I
OH
MAX9934 toc12
I
OH
(µA)
V
OH
(mV)
MAX9934F
MAX9934T
40
80
60
120
100
140
160
-40 -10 5 20-25 35 50 65 80 95 110 125
SUPPLY CURRENT
vs. TEMPERATURE (V
CS
= 0)
MAX9934 toc13
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
V
CM
= 0V
V
CM
= 5.5V
40
80
60
120
100
140
160
-40 -10 5 20-25 3550658095110125
SUPPLY CURRENT
vs. TEMPERATURE
MAX9934 toc14
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
V
CM
= 0V
V
CM
= 5.5V
1pA
10pA
100pA
1nA
10nA
-0.1 1.3 2.7 4.10.6 2.0 3.4 4.8 5.5
RS+ BIAS CURRENT
vs. V
RS+
MAX9934 toc15
V
RS+
(V)
RS+ BIAS CURRENT
T
A
= +125°C
T
A
= +25°C AND -40°C