MAX49921 datasheet(5/14 Pages) MAXIM

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Electrical Characteristics (VDD = 5V) (continued)

(VRS+ = VRS- = +50V, VDD = +5V, VSENSE = VRS+ - VRS- = 1mV, TA = -40°C to +125°C, unless otherwise noted. Typical values are

at TA = +25°C. (Note 1) )

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Output Voltage Swing

Low

VOL

Sink 500μA

No load

Output Short-Circuit

Current

ISC

Shorted to either VDD or GND

CURRENT-SENSE AMPLIFIER / AC CHARACTERISTICS

Signal Bandwidth

BW-3dB

All gain configurations VSENSE > 5mV

kHz

Output Slew Rate

2VP-P output square wave, centered at

1.5V

0.25

V/µs

AC Power-Supply

Rejection Ratio

AC PSRR

f = 200kHz

AC Common-Mode

Rejection Ratio

AC CMRR

f = 200kHz, 100mV sine wave

Capacitive Load Stability

CLOAD

With 250Ω isolation resistor

Without any isolation resistor

200

Input Voltage Noise

Density

At 1kHz

nV/√Hz

Settling Time (Settling to

0.1%)

VSENSE steps from 20% FS to 80% FS

(tR = tF = 5μs), CL = 20pF

µs

Note 1: All devices are 100% production tested at TA = +25°C. Limits over the operating temperature range and relevant supply

voltage range are guaranteed by design and characterization.

Note 2: Output is high-Z during power-up.

Note 3: Guaranteed by design, not final production tested.

Note 4: Gain and offset voltage are calculated based on two point measurements: VSENSE1 and VSENSE2. VSENSE1 = 5mV and

VSENSE2 = 40mV for G = 50V/V. VSENSE1 = 10mV and VSENSE2 = 100mV for G = 20V/V.

MAX49921

0 to 70V, High-Precision Current-Sense Amplifier

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