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

AV = 90V/V, R2/R1 = 89kΩ/1kΩ; for MAX9920, AV = 20V/V, R2/R1 = 79kΩ/1kΩ; TA = -40°C to +125°C, unless otherwise noted. Typical

values are at TA = +25°C.) (Note 1)

Electrical Characteristics (continued)

PARAMETERS

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Input Offset Voltage Drift

(Note 3)

VOSD

MAX9918

VRS+ = VRS- = +14V

±1.2

µV/°C

VRS+ = VRS- = -2V

±3.3

MAX9919_

VRS+ = VRS- = +14V

±1.8

VRS+ = VRS- = -2V

±1.8

MAX9920

VRS+ = VRS- = +14V

±2.4

VRS+ = VRS- = -2V

±8.8

Common-Mode Range

VCM

Inferred from CMRR tests

-20

+75

V

Common-Mode Rejection Ratio

(Note 3)

CMRR

MAX9918,

MAX9919

-2V ≤ VCM ≤ +14V

80

dB

-20V ≤ VCM ≤ +75V

96

MAX9920

-2V ≤ VCM ≤ +14V

72

-20V ≤ VCM ≤ +75V

86

Input Bias Current

IRS+, IRS- -20V ≤ VCM ≤ +75V

TA = +25°C

±175

µA

TA = -40°C to +125°C

±250

Input Offset Current

(IRS+ - IRS-)

0

±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

Input Resistance

MAX9918,

MAX9919_

Common mode

300

kΩ

Differential

715

Ω

MAX9920

Common mode

330

kΩ

Differential

224

Ω

Full-Scale Sense Voltage

(Note 4)

VSENSE

Inferred from gain

error test

MAX9918, MAX9919_

50

mV

MAX9920

200

Gain (Notes 2, 4)

G

MAX9918, MAX9920

Adj

V/V

MAX9919F

45

MAX9919N

90

Minimum Adjustable Gain

GADJ

MAX9918

30

V/V

MAX9920

7.5

www.maximintegrated.com

Maxim Integrated │ 4

MAX9918/MAX9919/MAX9920

-20V to +75V Input Range,

Precision Uni-/Bidirectional,

Current-Sense Amplifiers