MAX471CSA datasheet(3/12 Pages) MAXIM

Part #	MAX471CSA

Description	Precision, High-Side Current-Sense Amplifiers

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Manufacturer	MAXIM [Maxim Integrated Products]

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Precision, High-Side

Current-Sense Amplifiers

_______________________________________________________________________________________

3

ELECTRICAL CHARACTERISTICS—MAX472

(VCC = +3V to +36V, RG1 = RG2 = 200Ω, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

Note 2: VOS is defined as the input voltage (VSENSE) required to give minimum IOUT.

Note 3: VSENSE is the voltage across the sense resistor.

VSHDN = 2.4V

MAX472C

VSHDN = 0V

ILOAD = 0A, excludes ISIGN; VCC = 3V to 20V

VSHDN = 2.4V; VCC = 3V to 20V

VSIGN = 0.3V

VSIGN = 36V

VCC = 10V,

VSENSE = 3mV

VCC = 10V

MAX472E

IRG1 - IGR2

3V

≤ VCC ≤ 36V, VSENSE = 100mV

CONDITIONS

V

0VCC - 1.5

VOUT

OUT Output Voltage Range

µA

1.0

IIH

SHDN Input High Current

V

2.4

VIH

SHDN Input High Voltage

µA

1.0

IIL

SHDN Input Low Current

V

0.3

VIL

SHDN Input Low Voltage

µA

1.5

18.0

ICC(SHDN)

Shutdown Supply Current

mA

0.1

SIGN Output Sink Current

µA

1.0

SIGN Output Leakage Current

µV

60

140

SIGN Threshold (VSENSE

required to switch SIGN)

60

120

%/V

0.1

PSRR

Power-Supply Rejection Ratio

120

µA

20

48

ICC

V

336

VCC

Supply Voltage

Supply Current

µA

±3.0

Low-Level OUT Error

±2.5

µA

2.5

µV

140

VOS

Input Offset Voltage

(Note 2)

µA

20

35

IRG1, IRG2

Input Bias Current

µA

±0.4

±3.0

IOS

Input Bias-Current Matching

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

OUT Output Resistance

ROUT

IOUT = 1.5mA

13

M

Ω

OUT Rise, Fall Time

tR, tF

VSENSE = 5mV to 150mV, ROUT = 2kΩ,

COUT = 50pF, 10% to 90%

4

µs

OUT Settling Time to 1%

of Final Value

ts

VSENSE = 5mV to 150mV, ROUT = 2kΩ,

COUT = 50pF

15

µs

Maximum Output Current

IOUT

1.5

mA

MAX472C

MAX472E

MAX472C

MAX472E

VCC = 10V,

VSENSE = 0V

3

No-Load OUT Error

MAX472C

MAX472E

VSENSE = 100mV,

VCC = 10V (Note 3)

IRG/IOUT

OUT Current Accuracy

MAX472C

%

±2

MAX472E

±2.5

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