Instruction Manual

MAX9937
Automotive Current-Sense Amplifier
with Reverse-Battery Protection
6 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(V
CC
= 5V, V
BAT
= V
RSP
= 12V, V
SENSE
= V
RS+
- V
RS-
= 0, R
RSP
= R
RSN
= 500Ω, R
OUT
= 10kΩ, T
A
= +25°C, unless otherwise noted.
See the
Typical Application Circuit .)
16.0
17.0
16.5
19.0
18.5
18.0
17.5
19.5
20.0
-40 400 80 120 160
SUPPLY CURRENT vs. TEMPERATURE
MAX9937 toc17
TEMPERATURE (°C)
SUPPLY CURRENT (μA)
GAIN vs. FREQUENCY REFERENCED
TO DC GAIN (C
IN
= 220nF)
MAX9937 toc18
FREQUENCY (Hz)
GAIN (dB)
100k10k1k100
-30
-20
-10
0
10
-40
10 1M
C
LOAD
= 100nF
C
LOAD
= 10pF
C
LOAD
= 1nF
0
0.4
1.2
0.8
1.6
2.0
412168 202428
INPUT BIAS CURRENT MISMATCH
vs. COMMON-MODE VOLTAGE
MAX9937 toc13
COMMON-MODE VOLTAGE (V)
INPUT BIAS CURRENT MISMATCH (%)
0
1.0
0.5
2.0
1.5
2.5
3.0
3.0 4.03.5 4.5 5.0
INPUT BIAS CURRENT
vs. SUPPLY VOLTAGE
MAX9937 toc14
SUPPLY VOLTAGE (V)
INPUT BIAS CURRENT (μA)
80
1.2
1.6
0.8
0.4
0
3.0 4.03.5 4.5 5.0
INPUT BIAS CURRENT MISMATCH
vs. SUPPLY VOLTAGE
MAX9937 toc15
SUPPLY VOLTAGE (V)
INPUT BIAS CURRENT MISMATCH (%)
15
17
16
18
19
3.0 3.83.63.2 3.4 4.0 4.2 4.4 4.6 4.8 5.0
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX9937 toc16
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (μA)