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MAX44284

36V, Input Common-Mode, High-Precision, Low-Power Current-Sense Amplifier

Measure Four Decades of Dynamic Range without Increasing Measurement Errors

Data Sheet

Please check latest availability status for a specific part variant.

Overview

Description

The MAX44284 is a high-side, current-sense amplifier that operates with a 1.7V to 5.5V single supply and is optimized for very low power operation with only 21µA of quiescent current.

The MAX44284 offers precision accuracy specifications of 2µV VOS and gain error of 0.05%. The device features an input common-mode voltage range from -0.1V to +36V. This current-sense amplifier has a voltage output and is offered in four different gain versions.

The MAX44284 is offered in small 6-bump, 0.4mm-pitch WLP (1.3mm x 0.9mm) and 6-pin SOT23 packages and is specified for operation over the -40°C to +125°C automotive temperature range.

MAX44284: Typical Application Circuit

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Key Features

Supports Use of Small Current-Sense Resistors to Improve Power-Supply Conversion Efficiency and Measurement Accuracy
- Input Bias Current of 80nA (max)
- Very Low 2µV Input Offset Voltage (MAX44284F/H)
- Extremely Low 50nV/°C Input Offset Tempco Coefficient
- -0.1V to +36V Wide Input Common-Mode Range
- Low 0.05% Gain Error
Extends Battery Life
- Low Supply Current of 21µA
- 1.7V to 5.5V Single Supply
- Shutdown Input (Independent of V_DD)
Four Fixed Gain Options Simplify Design
- 50V/V – MAX44284F
- 100V/V – MAX44284H
- 200V/V – MAX44284W
- 500V/V – MAX44284E

Applications/Uses

Base-Stations
DC-DC Current Sensing in Power Management
Medical Pulse Oximeters and Infusion Pumps
Notebook Computers
Portable-/Battery-Powered Systems
Smartphones and Tablets

Parametric Specs

Part Number

Output Format

CMVR
(V)

V_CC
(V)

I_CC
(µA)

Bi-Dir. Curr. Sense

V_{SENSE_FS}
(mV)

V_OS @25°C
(µV)

Gain

Gain Accuracy @25°C
(%)

BW
(kHz)

Comp-
arators

Oper. Temp.
(°C)

Package/Pins

Budgetary
Price

min

max

min

max

typ

recomm.

max

@ -3dB

See Notes

MAX44284

Voltage

-0.1

1.7

5.5

100

100 V/V

200 V/V

50 V/V

500 V/V

0.15

-40 to +125

$0.93 @1k

See All Current Sense Amplifiers (51)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Design Resources

MAX44284EVKIT: Evaluation Kit for the MAX44284

Quality And Environmental

Device	Fab Process	Technology	Sample size	Rejects	FIT at 25°C	FIT at 55°C

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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