Datasheet

MAX9922/MAX9923
Ultra-Precision, High-Side
Current-Sense Amplifiers
4 _______________________________________________________________________________________
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
AC CHARACTERISTICS
MAX9922 10
MAX9923T
50
V
SENSE
= 10mV
P-P
MAX9923H
10
-3dB Small-Signal Bandwidth BW
V
SENSE
= 5mV
P-P MAX9923F 2.5
kHz
Slew Rate SR ∆V
OUT
= 2V, C
LOAD
= 100pF 0.4 V/µs
MAX9922 200
MAX9923T
100
MAX9923H
200
OUT Settling Time to 1% of
Final Value
C
LOAD
= 7pF
MAX9923F 400
µs
Input-Voltage Noise
Peak-to-Peak
f
O
= 0.1Hz to 10Hz 3.4 µV
P-P
Autozeroing Clock Frequency f
C
Pseudo-random 20 kHz
Capacitive-Load Stability No sustained oscillations 200 pF
POWER-SUPPLY CHARACTERISTICS
Supply Voltage Range V
DD
Guaranteed by PSRR 2.85 5.50 V
Power-Supply Rejection Ratio PSRR
2.85V ≤ V
DD
≤ 5.5V, -40°C ≤ T
A
≤ +85°C
(Note 2)
93 99 dB
V
DD
= 5.0V 780 1300
I
DD
V
DD
= 3.0V 700 1500
Quiescent Supply Current
I
RSB
V
RSB
= 12V 200 300
µA
I
DD_SD
V
SHDN
= 0.3V 0.05 1
Shutdown Supply Current
I
RSB_SD
V
SHDN
= 0.3V, V
RSB
= 28V 0.05 1
µA
Power-Down Input Current
I
RS+L,
I
RS-L
V
DD
= V
REF
= 0V, V
RSB
= V
RS+
= V
RS-
= 28V 0.01 0.1 µA