Datasheet

MAX9922/MAX9923
Ultra-Precision, High-Side
Current-Sense Amplifiers
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
RSB
= V
RS+
= V
RS-
=
+12V, V
DD
= +3.3V, V
GND
= 0V, V
REF
= V
DD
/2 for bidirectional, V
REF
= 0V for unidirectional, V
SENSE
= V
RS+
- V
RS-
=
0V, MAX9922 is set for A
V
=100V/V (R1 = 1kΩ, R2 = 99kΩ), SHDN = V
DD
, T
A
= -40°C to +85°C, unless otherwise noted. Typical values
are at T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
T
A
= +25°C ±0.17 ±0.40
MAX9922
(A
V
= 100)
-40°C ≤ T
A
≤ +85°C ±0.60
T
A
= +25°C ±0.12 ±0.30
MAX9923T
-40°C ≤ T
A
≤ +85°C ±0.60
T
A
= +25°C ±0.24 ±0.40
MAX9923H
-40°C ≤ T
A
≤ +85°C ±0.75
T
A
= +25°C ±0.21 ±0.50
Gain Accuracy
(Note 5)
∆A
V
MAX9923F
-40°C ≤ T
A
≤ +85°C ±0.80
%
MAX9922 (A
V
= 100) ±0.06
MAX9923T
±0.04
MAX9923H
±0.06
Gain Nonlinearity ~A
V
MAX9923F
±0.12
%
Open-Loop Gain A
VOL
MAX9922 160 dB
Input Bias Current I
RS+
,
I
RS-
1pA
FB Bias Current I
FB
MAX9922 1 pA
FB Resistance R
FB
MAX9923T/MAX9923H/MAX9923F resistance
between FB and REF
1kΩ
T
A
= +25°C0
V
DD
-
1.4
REF Input Range
Guaranteed by REF
CMRR test
-40°C ≤ T
A
≤ +85°C0
V
DD
-
1.6
V
REF Common-Mode Rejection
Ratio
0 ≤ REF ≤ V
DD
- 1.4V (Note 2) 94 100 dB
MAX9922 (bidirectional) ±20
MAX9923T (bidirectional) ±60 ±70
MAX9923H (bidirectional) ±16 ±20
REF Input Current
(Note 6)
MAX9923F (bidirectional) ±6 ±7
µA
R
L
= 10kΩ to GND
and REF = GND
730
OUT High Voltage V
OH
V
OH
= V
DD
– V
OUT
(Note 7)
R
L
= 10kΩ to V
DD
and REF = V
DD
- 1.4
16
mV
R
L
= 10kΩ to GND and REF = GND 1 10
OUT Low Voltage (Note 7) V
OL
R
L
= 10kΩ to V
DD
and REF = V
DD
- 1.4 6 30
mV
SHDN Logic-Low V
IL
V
DD
= 5.5V 0.3 V
SHDN Logic-High V
IH
V
DD
= 5.5V
0.6 x
V
DD
V
SHDN Input Current I
IH
/I
IL
0.001 ±1 µA