MAX9920 datasheet(3/17 Pages) MAXIM

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-20V to +75V Input Range, Precision

Uni-/Bidirectional, Current-Sense Amplifiers

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PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

VRS+ = VRS- = +14V

±1.2

MAX9918

VRS+ = VRS- = -2V

±3.3

VRS+ = VRS- = +14V

±1.8

MAX9919_

VRS+ = VRS- = -2V

±1.8

VRS+ = VRS- = +14V

±2.4

Input Offset Voltage Drift

(Note 3)

VOSD

MAX9920

VRS+ = VRS- = -2V

±8.8

µV/°C

Common-Mode Range

VCM

Inferred from CMRR tests

-20

+75

-2V

≤ VCM ≤ +14V

MAX9918, MAX9919

-20V

≤ VCM ≤ +75V

-2V

≤ VCM ≤ +14V

Common-Mode Rejection Ratio

(Note 3)

CMRR

MAX9920

-20V

≤ VCM ≤ +75V

TA = +25°C

±175

Input Bias Current

IRS+, IRS-

-20V

≤ VCM ≤ +75V

TA = -40°C to +125°C

±250

µA

Input Offset Current

(IRS+ - IRS-)

±8

µA

Input Leakage Current in

Shutdown

-20V

≤ VCM ≤ +75V, VSHDN = VCC = 5V

±30

µA

Input Leakage Current

VRS+ = VRS- = +14V, +75V, VCC = 0V

±30

µA

Common mode

300

Ω

MAX9918,

MAX9919_

Differential

715

Ω

Common mode

330

Ω

Input Resistance

MAX9920

Differential

224

Ω

MAX9918, MAX9919_

Full-Scale Sense Voltage (Note 4)

VSENSE

Inferred from gain

error test

MAX9920

200

MAX9918, MAX9920

Adj

MAX9919F

Gain (Notes 2, 4)

MAX9919N

V/V

MAX9918

Minimum Adjustable Gain

GADJ

MAX9920

7.5

V/V

ELECTRICAL CHARACTERISTICS (continued)

(VCC = 5V, VRS+ = VRS- = +14V, VSENSE = (VRS+ - VRS-) = 0V, VSHDN = VGND = 0V, VREFIN = VCC/2, RL = 100kΩ; for MAX9918, AV =

90V/V, R2/R1 = 89k

Ω/1kΩ; for MAX9920, AV = 20V/V, R2/R1 = 79kΩ/1kΩ; TA = -40°C to +125°C, unless otherwise noted. Typical val-

ues are at TA = +25°C.) (Note 1

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