MAX9634 Datasheet, PDF (1/11 Pages) Maxim Integrated Products – 1μA, 4-Bump UCSP/SOT23, Precision Current-Sense Amplifier

19-5021; Rev 1; 2/10
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1µA, 4-Bump UCSP/SOT23,
Precision Current-Sense Amplifier
General Description
The MAX9634 high-side current-sense amplifier offers
precision accuracy specifications of V_OS less than
250µV (max) and gain error less than 0.5% (max).
Quiescent supply current is an ultra-low 1µA. The
MAX9634 fits in a tiny, 1mm x 1mm UCSP™ package
size or a 5-pin SOT23 package, making the part ideal for
applications in notebook computers, cell phones, PDAs,
and all battery-operated portable devices where accura-
cy, low quiescent current, and small size are critical.
The MAX9634 features an input common-mode voltage
range from 1.6V to 28V. These current-sense amplifiers
have a voltage output and are offered in four gain versions:
25V/V (MAX9634T), 50V/V (MAX9634F), 100V/V
(MAX9634H), and 200V/V (MAX9634W).
The four gain selections offer flexibility in the choice of
the external current-sense resistor. The very low 250µV
(max) input offset voltage allows small 25mV to 50mV
full-scale V_SENSE voltage for very low voltage drop at
full-current measurement.
The MAX9634 is offered in tiny 4-bump UCSP (1mm x
1mm x 0.6mm footprint) and 5-pin SOT23 packages
specified for operation over the -40°C to +85°C extend-
ed temperature range.
Applications
Cell Phones
PDAs
Power-Management Systems
Portable/Battery-Powered Systems
Notebook Computers
Features
o Ultra-Low Supply Current of 1µA (max)
o Low 250µV (max) Input Offset Voltage
o Low < 0.5% (max) Gain Error
o Input Common Mode: +1.6V to +28V
o Voltage Output
o Four Gain Versions Available
25V/V (MAX9634T)
50V/V (MAX9634F)
100V/V (MAX9634H)
200V/V (MAX9634W)
o Tiny 1mm x 1mm x 0.6mm, 4-Bump UCSP or
5-Pin SOT23 Packages
Ordering Information
PART
PIN-
PACKAGE
GAIN
(V/V)
TOP
MARK
MAX9634TERS+
4 UCSP
25
+ABX
MAX9634FERS+
4 UCSP
50
+ABY
MAX9634HERS+
4 UCSP
100
+ABZ
MAX9634WERS+
4 UCSP
200
+ACA
MAX9634TEUK+
5 SOT23
25
+AFHG
MAX9634FEUK+
5 SOT23
50
+AFHH
MAX9634HEUK+
5 SOT23
100
+AFHI
MAX9634WEUK+
5 SOT23
200
+AFHJ
+Denotes a lead(Pb)-free/RoHS-compliant package.
Note: All devices are specified over the -40°C to +85°C
extended temperature range.
TOP VIEW
(BUMPS ON BOTTOM)
RS+ A1
A2 RS-
UCSP is a trademark of Maxim Integrated Products, Inc.
Pin Configurations
RS+
RS-
5
4
MAX9634T/F/H/W
GND B1
B2 OUT
UCSP
DRAWINGS NOT TO SCALE
MAX9634T/F/H/W
1
2
3
GND
GND
OUT
SOT23
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.