Datasheet MAX4172 (Maxim) - 3

MAX4172 Low-Cost, Precision, High-Side Current-Sense Amplifier
Electrical Characteristics (continued)
(V+ = +3V to +32V; VRS+, VRS- = 0 to 32V; TA = TMIN to TMAX; unless otherwise noted. Typical values are at V+ = +12V, VRS+ = 12V, TA = +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Maximum Output Voltage (OUT) IOUT ≤ 1.5mA V+ - 1.2 V V Bandwidth SENSE = 100mV 800 kHz VSENSE = 6.25mV (Note 1) 200 Maximum Output Current IOUT 1.5 1.75 mA T Transconductance G Gm = IOUT/(VRS+ - VRS-), A = 0°C to +105°C 9.8 10 10.2 m V mA/V SENSE = 100mV, VRS+ > 2.0V TA = -40°C to 0°C 9.7 10 10.3 V+ Threshold for PG V+ rising 2.77 Output Low (Note 2) V V+ falling 2.67 PG Output Low Voltage VOL ISINK = 1.2mA, V+ = 2.9V, TA = +25°C 0.4 V Leakage Current into PG V+ = 2.5V, TA = +25°C 1 µA Power-Off Input Leakage Current (RS+, RS-) V+ = 0V, VRS+ = VRS- = 32V 0.1 1 µA OUT Rise Time VSENSE = 0 to 100mV, 10% to 90% 400 ns OUT Fall Time VSENSE = 100mV to 0mV, 90% to 10% 800 ns Rising 1.3 OUT Settling Time to 1% VSENSE = 5mV to 100mV µs Falling 6 OUT Output Resistance VSENSE = 150mV 20 MΩ
Note 1:
6.25mV = 1/16 of typical full-scale sense voltage (C/16).
Note 2:
Valid operation of the MAX4172 is guaranteed by design when PG is low.
Typical Operating Characteristics
(V+ = +12V, VRS+ = 12V, ROUT = 1kΩ, TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT OUTPUT ERROR C/16 LOAD OUTPUT ERROR vs. SUPPLY VOLTAGE vs. SUPPLY VOLTAGE vs. SUPPLY VOLTAGE
1050 1.0 8 T V V A = +105°C MAX4172-01 0.9 SENSE = 100mV SENSE = 6.25mV MAX4172-02 TA = -40°C 6 MAX4172-03 950 0.8 T 0.7 4 TA = +25°C TA = -40°C 850 A = +85°C 0.6 TA = +105°C 2 750 0.5 TA = +25°C ERROR (%) 0.4 ERROR (%) 0 T 650 0.3 A = +85°C -2 TA = +85°C TA = -40°C 0.2 550 QUIESCENT SUPPLY CURRENT (μA) -4 I 0.1 T OUT = 0mA A = +25°C TA = +105°C IOUT = 0mA 450 0 -6 0 10 20 30 40 0 10 20 30 40 0 10 20 30 40 V+ (V) V+ (V) V+ (V) www.maximintegrated.com Maxim Integrated │ 3