Datasheet

76V, High-Side, Current-Sense Amplifiers with
Voltage Output
AC ELECTRICAL CHARACTERISTICS
(V
CC
= V
RS+
= 4.5V to 76V, V
REF1A
= V
REF1B
= 5V (MAX4081 only), V
SENSE
= (V
RS+
- V
RS-
) = 0V, R
LOAD
= 100kΩ, C
LOAD
= 20pF,
T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Notes 1, 2)
PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS
MAX4080F/T/S 250
Bandwidth BW
V
CC
= V
RS+
=
48V, V
OUT
= 2.5V
MAX4081F/T/S 150
kHz
V
SENSE
= 10mV to 100mV 20
OUT Settling Time to 1% of Final
Value
V
SENSE
= 100mV to 10mV 20
µs
Capacitive-Load Stability No sustained oscillations 500 pF
Output Resistance R
OUT
V
SENSE
= 100mV 0.1 Ω
Power-Up Time V
C C
= V
RS +
= 48V , V
S E NS E
= 100mV ( Note 9) 50 µs
Saturation Recovery Time (Notes 9,10) 50 µs
Note 1: All devices are 100% production tested at T
A
= +25°C. All temperature limits are guaranteed by design.
Note 2: V
REF
is defined as the average voltage of V
REF1A
and V
REF1B
. REF1B is usually connected to REF1A or GND.
V
SENSE
is defined as V
RS+
- V
RS-
.
Note 3: The common-mode range at the low end of 4.5V applies to the most positive potential at RS+ or RS-. Depending on the
polarity of V
SENSE
and the device’s gain, either RS+ or RS- can extend below 4.5V by the device’s typical full-scale value of
V
SENSE
.
Note 4: Negative V
SENSE
applies to MAX4081 only.
Note 5: V
SENSE
is:
MAX4080F, 10mV to 1000mV
MAX4080T, 10mV to 250mV
MAX4080S, 10mV to 100mV
MAX4081F, -500mV to +500mV
MAX4081T, -125mV to +125mV
MAX4081S, -50mV to +50mV
Note 6: V
OS
is extrapolated from the gain accuracy test for the MAX4080 and measured as (V
OUT
- V
REF
)/A
V
at V
SENSE
= 0V, for the
MAX4081.
Note 7: V
SENSE
is:
MAX4080F, 500mV
MAX4080T, 125mV
MAX4080S, 50mV
MAX4081F/T/S, 0V
V
REF1B
= V
REF1A
= 2.5V
Note 8: Output voltage is internally clamped not to exceed 18V.
Note 9: Output settles to within 1% of final value.
Note 10: The device will not experience phase reversal when overdriven.
MAX4080/MAX4081
4
Maxim Integrated