MAX9928/MAX9929
-0.1V to +28V Input Range, Micropower,
Uni-/Bidirectional, Current-Sense Amplifiers
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
RS+
= -0.1V to +28V, V
CC
= 3.3V, V
SENSE
= (V
RS+
- V
RS-
) = 0V, R
OUT
= 10kΩ for MAX9928F, T
A
= -40°C to +125°C, unless other-
wise noted. Typical values are at T
A
= +25°C.) (Note 1)
Note 1: All devices are 100% production tested at T
A
= +25°C. All temperature limits are guaranteed by design.
Note 2: V
OS
is extrapolated from two point transconductance and gain accuracy tests. Measurements are made at V
SENSE
=
+5mV and V
SENSE
= +50mV for MAX992_F. These measurements are also used to test the full-scale sense voltage,
transconductance, and gain. These V
OS
specifications are for the trimmed direction only (V
RS+
> V
RS-
). For current flowing
in the opposite direction (V
RS-
> V
RS+
), V
OS
is ±1mV (max) at +25°C and ±1.8mV (max) over temperature, when V
RS+
is at
3.6V. See the
Detailed Description
for more information.
Note 3: Guaranteed by common-mode rejection ratio. Extrapolated V
OS
as described in Note 2 is used to calculate common-mode
rejection ratio.
Note 4: Includes input bias current of SIGN comparator.
Note 5: Leakage in to RS+ or RS- when V
CC
= 0V. Includes input leakage current of SIGN comparator. This specification does not
add to the bias current.
Note 6: Output voltage should be 650mV below V
CC
to achieve full accuracy.
Note 7: I
OL
is the minimum output current in the V
SENSE
- I
OUT
transfer characteristics. V
OL
is the minimum output voltage in the
V
SENSE
- V
OUT
transfer characteristic.
Note 8: V
SENSE
voltage required to switch comparator.
Note 9: Discharge to charge trip point is functionally tested at V
CM
= -0.1V, +3.6V, and +28V.
Note 10: Guaranteed by PSRR test. Extrapolated V
OS
as described in Note 2 is used to calculate the power-supply rejection ratio.
V
SENSE
has to be such that the output voltage is 650mV below V
CC
to achieve full accuracy.
