Datasheet

MAX9922/MAX9923
Ultra-Precision, High-Side
Current-Sense Amplifiers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(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)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
RSB, RS+, RS- to GND...........................................-0.3V to +30V
V
DD
to GND..............................................................-0.3V to +6V
OUT, REF, FB, SHDN
to GND .................-0.3V to the lower of (V
DD
+ 0.3V) and +6V
OUT Short Circuit to V
DD
or GND ..............................Continuous
Differential Voltage (V
RS+
- V
RS-
), (V
RSB
- V
RS+
),
(V
RSB
- V
RS-
) ...................................................................±5.5V
Current into Any Pin..........................................................±20mA
Continuous Power Dissipation (T
A
= +70°C)
10-Pin µMAX (derate 4.5mW/°C above +70°C) ...........362mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DC CHARACTERISTICS
MAX9922 (A
V
= 100), V
SENSE
= 0V,
V
REF
= V
DD
/2, -40°C ≤ T
A
≤ +85°C
±0.1 ±10
MAX9923T, V
SENSE
= 0V, V
REF
= V
DD
/2,
-40°C ≤ T
A
≤ +85°C
±0.2 ±25
MAX9923H, V
SENSE
= 0V, V
REF
= V
DD
/2
-40°C ≤ T
A
≤ +85°C
±0.2 ±20
Input Offset Voltage
(Notes 2, 3)
V
OS
MAX9923F, V
SENSE
= 0V, V
REF
= V
DD
/2,
-40°C ≤ T
A
≤ +85°C
±0.1 ±10
µV
MAX9922 (A
V
= 100V/V), V
SENSE
= 0V,
V
REF
= V
DD
/2, -40°C ≤ T
A
≤ +85°C
±0.05
MAX9923T, V
SENSE
= 0V, V
REF
= V
DD
/2,
-40°C ≤ T
A
≤ +85°C
±0.20
MAX9923H, V
SENSE
= 0V, V
REF
= V
DD
/2,
-40°C ≤ T
A
≤ +85°C
±0.10
Input Offset Voltage
Temperature Drift (Notes 2, 4)
TCV
OS
MAX9923F, V
SENSE
= 0V, V
REF
= V
DD
/2,
-40°C ≤ T
A
≤ +85°C
±0.05
µV/°C
Input Common-Mode Range V
CMR
Guaranteed by CMRR 1.90 28.00 V
Input Common-Mode Rejection CMRR
1.9V ≤ V
RS+
≤ 28V, -40°C ≤ T
A
≤ +85°C
(Note 2)
121 140 dB
MAX9922 Adj
MAX9923T 25
MAX9923H 100
Gain
A
V
MAX9923F 250
V/V