Datasheet

MAX4373/MAX4374/MAX4375
Low-Cost, Micropower, High-Side Current-Sense
Amplifier + Comparator + Reference ICs
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +2.7V to +28V, V
RS+
= 0 to +28V, V
SENSE
= 0V, V
RESET
= 0V, R
LOAD
= 1MΩ, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Typical values are at T
A
= +25°C.) (Note 1)
±0.3 ±1.7
±2.7T
A
= -40°C to +85°C
T
A
= +25°C
V
SENSE
=
20mV to 100mV,
V
CC
= 12V, V
RS+
=
12V, Gain = 100
Output Low Voltage V
OL
0.6 VI
SINK
= 1mA
Propagation Delay 4 µs
C
L
= 10pF, R
L
= 10kΩ pull-up to 5V,
5mV of overdrive
Input Bias Current I
B
±2.2 ±15 nA
Comparator Hysteresis -9 mV
0.1 ms
Saturation Recovery Time
(Note 8)
V
CC
= 12V, V
RS+
= 12V, C
LOAD
= 10pF
dB
ms
Power-Supply Rejection
Power-Up Time to 1% of Final
Value
PSR
20
V
SENSE
= 100mV to
6.25mV
V
SENSE
= 6.25mV to
100mV
±2.7T
A
= -40°C to +85°C
T
A
= +25°C
+50
+100
MAX437_F
MAX437_H
V
SENSE
= 6.25mV
V
SENSE
= 100mV,
Gain = +100V/V
V
SENSE
= 100mV,
Gain = +50V/V
V
SENSE
= 100mV,
Gain = +20V/V
50
110
120
PARAMETER SYMBOL MIN TYP MAX UNITS
72 87
OUT Output Resistance R
OUT
1.5 Ω
Capacitive Load Stability 1000 pF
OUT Settling Time to 1% of
Final Value
20
µs
0.5
Comparator Threshold V
TH
590 600 610
mV
Gain
-3dB Bandwidth BW
200
kHz
A
V
+20
V/V
Gain Accuracy ∆A
V
±0.3 ±1.7
%
CONDITIONS
V
OUT
= 2V, V
RS+
> 2V
V
SENSE
= 100mV
No sustained oscillations
Gain = +20V/V,
V
CC
= 12V,
V
RS+
= 12V,
C
LOAD
= 10pF
V
SENSE
= 100mV, C
LOAD
= 10pF,
V
CC
= 12V, V
RS+
= 12V
T
A
= +25°C
V
RS+
= 12V,
V
CC
= 12V,
C
LOAD
= 10pF
MAX437_T
V
SENSE
=
20mV to 150mV;
V
CC
= 12V; V
RS+
=
12V; Gain = 20, 50
586 614T
A
= T
MIN
to T
MAX
COMPARATOR (Note 9)