MAX4172ESA datasheet(3/8 Pages) MAXIM

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ELECTRICAL CHARACTERISTICS (continued)

(V+ = +3V to +32V; RS+, RS- = 0V to 32V; TA = TMIN to TMAX; unless otherwise noted. Typical values are at V+ = +12V, RS+ = 12V,

TA = +25°C.)

Low-Cost, Precision, High-Side

Current-Sense Amplifier

_______________________________________________________________________________________

1000

950

500

010

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

600

650

550

900

850

800

V+ (V)

750

700

TA = +85°C

TA = +25°C

TA = -40°C

IOUT = 0mA

0.5

0.4

-0.5

010

OUTPUT ERROR

vs. SUPPLY VOLTAGE

-0.3

-0.4

-0.2

0.3

0.2

0.1

V+ (V)

-0.1

TA = +25°C

TA = +85°C

TA = -40°C

VSENSE = 100mV

1.5

1.0

-3.0

010

C/16 LOAD OUTPUT ERROR

vs. SUPPLY VOLTAGE

-2.0

-1.5

-2.5

0.5

V+ (V)

-0.5

-1.0

TA = +85°C

TA = +25°C

TA = -40°C

VSENSE = 6.25mV

__________________________________________Typical Operating Characteristics

(V+ = +12V, VRS+ = 12V, ROUT = 1kΩ, TA = +25°C, unless otherwise noted.)

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.

IOUT ≤ 1.5mA

CONDITIONS

V+ - 1.2

Maximum Output Voltage

(OUT)

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

V+ = 2.5V, TA = +25°C

ISINK = 1.2mA, V+ = 2.9V, TA = +25°C

µA

Leakage Current into

0.4

VOL

PG Output Low Voltage

VSENSE = 5mV to 100mV

VSENSE = 0mV to 100mV, 10% to 90%

µs

OUT Settling Time to 1%

1.3

400

OUT Rise Time

VSENSE = 150mV

Ω

OUT Output Resistance

VSENSE = 100mV to 0mV, 90% to 10%

800

OUT Fall Time

Rising

Falling

V+ = 0V, VRS+ = VRS- = 32V

µA

0.1

Power-Off Input Leakage

Current (RS+, RS-)

VSENSE = 100mV

kHz

800

Bandwidth

Gm = IOUT / (VRS+ - VRS-),

VSENSE = 100mV, VRS+ > 2.0V

mA/V

9.8

10.2

Transconductance

1.5

1.75

IOUT

Maximum Output Current

V+ rising

2.77

V+ Threshold for

PG Output

Low (Note 2)

VSENSE = 6.25mV (Note 1)

TA = 0°C to +85°C

V+ falling

2.67

TA = -40°C to 0°C

9.7

10.3

200

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