Datasheet

MAX9922/MAX9923
Ultra-Precision, High-Side
Current-Sense Amplifiers
6 _______________________________________________________________________________________
Typical Operating Characteristics
(V
DD
= 3.3V, V
SHDN
= V
DD
, V
RSB
= V
RS+
= V
RS-
= 12V, T
A
= +25°C, unless otherwise noted.)
MAX9922 UNIPOLAR
GAIN ACCURACY HISTOGRAM
MAX9922/23 toc01
GAIN ACCURACY (%)
N (%)
0.30.20.10-0.4 -0.3 -0.2 -0.1-0.5
10
20
30
40
60
50
90
80
70
0
0.50.4
MAX9922 INPUT
OFFSET VOLTAGE HISTOGRAM
MAX9922/23 toc02
V
OS
(
µ
V)
N (%)
6420-8 -6 -4 -2-10
10
20
30
40
60
50
0
108
MAX9922
OFFSET VOLTAGE DRIFT HISTOGRAM
MAX9922/23 toc03
TCV
OS
(nV/
°
C)
N (%)
3020100-40 -30 -20 -10-50
10
20
30
40
60
50
0
5040
INPUT REFERRED OFFSET
vs. INPUT COMMON-MODE VOLTAGE
MAX9922/23 toc04
INPUT COMMON MODE (V)
OFFSET VOLTAGE (µV)
24204 8 12 16
-6
-4
-2
0
2
4
6
8
-8
028
MAX9922
INPUT vs. OUTPUT
MAX9922/23 toc05
DIFFERENTIAL INPUT (mV)
OUTPUT-REF (V)
150-150 0 50-50
-1.5
-1.0
-0.5
0
0.5
1.0
1.5
2.0
-2.0
-250 250
R
F
= 100kΩ
R
G
= 20kΩ
MAX9922
INPUT vs. OUTPUT
MAX9922/23 toc06
DIFFERENTIAL INPUT (mV)
OUTPUT-REF (V)
15-15 0 5-5
-1.5
-1.0
-0.5
0
0.5
1.0
1.5
2.0
-2.0
-25 25
R
F
= 100kΩ
R
G
= 1kΩ
0
0.1
0.3
0.2
0.4
0.5
0105152025
GAIN ERROR
vs. INPUT COMMON-MODE VOLTAGE
MAX9922/23 toc07
INPUT COMMON MODE (V)
GAIN ERROR (%)
REF = GND
V
OH
/V
OL
vs. I
OH
/I
OL
MAX9922/23 toc08
OUTPUT CURRENT (mA)
V
OH
/V
OL
(V)
8642
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0
010
V
OH
V
OL