MAX44284 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – 36V, Input Common-Mode, High-Precision,Low-Power Current-Sense Amplifier

MAX44284
36V, Input Common-Mode, High-Precision,
Low-Power Current-Sense Amplifier
General 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 V_OS 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 automo-
tive temperature range.
Applications
● Smartphones and Tablets
● Notebook Computers
● DC-DC Current Sensing in Power Management
● Portable-/Battery-Powered Systems
● Medical Pulse Oximeters and Infusion Pumps
● Base-Stations
Ordering Information appears at end of data sheet.
Typical Application Circuit
Benefits and 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
For related parts and recommended products to use with this part, refer
to www.maximintegrated.com/MAX44284.related.
VBATT = UP TO 36V
ILOAD
RSENSE
RS+
RS-
LOAD
VDD = 3.3V
MAX44284
OUT
VDD = 3.3V
µC
ADC
19-6862; Rev 4; 1/15