MAX9920 datasheet(6/17 Pages) MAXIM

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-20V to +75V Input Range, Precision

Uni-/Bidirectional, Current-Sense Amplifiers

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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

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

VCM = -2V to +14V step

2.5

MAX9918,

VSENSE = 50mV

VCM = +14V to -2V step

0.5

VCM = -2V to +14V step

2.5

MAX9919F,

VSENSE = 50mV

VCM = +14V to -2V step

0.5

VCM = -2V to +14V step

3.5

MAX9919N,

VSENSE = 50mV

VCM = +14V to -2V step

3.5

VCM = -2V to +14V step

0.25

1% Settling Time from VCM Step

MAX9920,

VSENSE = 200mV

VCM = +14V to -2V step

2.5

µs

MAX9918, VSENSE = 50mV, 1% settling

4.5

MAX9919F, VSENSE = 50mV, 1% settling

MAX9919N, VSENSE = 50mV, 1% settling

Power-Up Time

MAX9920, VSENSE = 200mV, 1% settling

µs

Maximum Capacitive Load Stability

No sustained oscillations (Note 5)

MAX9918, MAX9919_

Input Referred Noise Voltage

Density

10kHz

MAX9920

174

nV/

√Hz

Note 1: All devices are 100% production tested at TA = +25°C. All temperature limits are guaranteed by design.

Note 2: VOS is extrapolated from two point gain error tests. Measurements are made at VSENSE = 5mV and 50mV for

MAX9918/MAX9919N/MAX9919F, and VSENSE = 20mV and 200mV for MAX9920.

Note 3: Extrapolated VOS as described above in Note 2 is used to calculate VOS drift, CMRR, and PSRR.

Note 4: OUT should be 100mV away from either rail to achieve rated accuracy, or limited by a VSENSE of 50mV for the

MAX9918/MAX9919N/MAX9919F and 200mV for the MAX9920.

Note 5: Not production tested. Guaranteed by design.

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