Datasheet

(V
CC
= 5V, V
BAT
= V
RSP
= 12V, V
SENSE
= V
RS+
- V
RS-
= 0V, R
RSP
= R
RSN
= 500Ω, R
OUT
= 10kΩ, T
A
= +25°C, unless otherwise
noted. See the Typical Application Circuit.)
AC POWER-SUPPLY REJECTION RATIO
C
IN
= 220nF
MAX9937 toc06
FREQUENCY (Hz)
PSRR (dBV)
100k10k1k10010
-120
-100
-80
-60
-40
-20
0
-140
1 1M
C
LOAD
= 100pF
C
LOAD
= 10pF
C
LOAD
= 1nF
AC COMMON-MODE REJECTION RATIO
C
IN
= 220nF
MAX9937 toc05
FREQUENCY (Hz)
CMRR (dBV)
100k10k1k10010
-100
-80
-60
-40
-20
0
-120
1 1M
C
LOAD
= 10pF
C
LOAD
= 1nF
C
LOAD
= 100pF
-700
-500
-400
-300
-200
-100
0
3.0 3.5 4.0 4.5 5.0
OFFSET VOLTAGE
vs. POWER-SUPPLY VOLTAGE
MAX9937 toc04
POWER-SUPPLY VOLTAGE (V)
OFFSET VOLTAGE (µV)
-600
T
A
= +125°C
T
A
= -40°C
T
A
= +25°C
100
400
300
200
600
500
700
800
4 12 168 20 24 28
OFFSET VOLTAGE
vs. COMMON-MODE VOLTAGE
MAX9937 toc03
COMMON-MODE VOLTAGE (V)
OFFSET VOLTAGE (µV)
T
A
= +25°C
T
A
= +125°C
T
A
= -40°C
0
0
200
100
400
300
500
600
-40 400 80 120 160
OFFSET VOLTAGE vs. TEMPERATURE
MAX9937 toc02
TEMPERATURE (°C)
OFFSET VOLTAGE (µV)
0
10
5
20
15
30
25
35
25 100 175 250 325 400 475 550
OFFSET VOLTAGE HISTOGRAM
MAX9937 toc01
OFFSET VOLTAGE (µV)
FREQUENCY (%)
Maxim Integrated │ 4
www.maximintegrated.com
MAX9937 Current-Sense Amplier with
Reverse-Battery Protection
Typical Operating Characteristics