Datasheet

MAX9934
High-Precision, Low-Voltage, Current-Sense Amplifier
with Current Output and Chip Select for Multiplexing
5
Maxim Integrated
Typical Operating Characteristics
(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.)
MAX9934T V
OS
HISTOGRAM
MAX9934 toc01
V
OS
(FV)
N (%)
-8 -6 -4 -2 0 2 4 6 8
5
10
15
20
25
30
35
40
0
-10 10
OFFSET VOLTAGE
vs. COMMON-MODE VOLTAGE
MAX9934 toc04
COMMON-MODE VOLTAGE (V)
OFFSET VOLTAGE (FV)
4.84.12.7 3.41.3 2.00.6
-8
-6
-4
-2
0
2
4
6
8
10
-10
-0.1 5.5
V
CC
= 3.3V
V
CC
= 3.6V
V
CC
= 2.5V
MAX9934T DRIFT V
OS
HISTOGRAM
MAX9934 toc02
TCV
OS
(nV/NC)
N (%)
6 1218243036424854
5
10
15
20
25
30
0
060
OFFSET VOLTAGE
vs. COMMON-MODE VOLTAGE
MAX9934 toc03
COMMON-MODE VOLTAGE (V)
OFFSET VOLTAGE (FV)
4.84.12.7 3.41.3 2.00.6
-8
-6
-4
-2
0
2
4
6
8
10
-10
-0.1 5.5
T
A
= +125NC
T
A
= +25NC
T
A
= -40NC
0
0.5
1.5
1.0
2.5
3.0
2.0
3.5
0203010 40 50 60 70 80
V
OUT
vs. V
SENSE
V
REF
= GND
MAX9934 toc09
V
SENSE
(mV)
V
OUT
(V)
GAIN = 25µA/mV
GAIN = 5µA/mV
UNIDIRECTIONAL
5
10
15
20
25
30
0
-0.16 -0.12 -0.08 -0.04
0
0.04 0.08
0.12
0.16
-0.20
0.20
MAX9934T GAIN ERROR
HISTOGRAM
MAX9934 toc05
GE (%)
N (%)
5
10
15
20
25
30
35
0
-160 -120
-80 -40
0
40 80
120 160
-200
200
MAX9934T GAIN ERROR
DRIFT HISTOGRAM
MAX9934 toc06
TC GE (PPM/NC)
N (%)
5
10
15
20
25
30
35
40
0
-0.16 -0.12 -0.08 -0.04
0
0.04 0.08 0.12 0.16
-0.20
0.20
MAX9934F GAIN ERROR
HISTOGRAM
MAX9934 toc07
GE (%)
N (%)
-160 -120
-80 -40
0
40 80
120 160
-200
200
MAX9934F GAIN ERROR DRIFT
HISTOGRAM
MAX9934 toc08
TC GE (PPM/°C)
N (%)
5
10
15
20
25
0