MAX9634 Maxim, MAX9634 Datasheet

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MAX9634

Manufacturer Part Number
MAX9634
Description
The MAX9634 high-side current-sense amplifier offers precision accuracy specifications of VOS less than 250µV (max) and gain error less than 0
Manufacturer
Maxim
Datasheet

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The MAX9634 high-side current-sense amplifier offers
precision accuracy specifications of V
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
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.
19-5021; Rev 2; 8/10
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.
Cell Phones
PDAs
Power-Management Systems
Portable/Battery-Powered Systems
Notebook Computers
SENSE
________________________________________________________________ Maxim Integrated Products
voltage for very low voltage drop at
DRAWINGS NOT TO SCALE
GND
RS+
General Description
(BUMPS ON BOTTOM)
MAX9634T/F/H/W
A1
B1
TOP VIEW
UCSP
Precision Current-Sense Amplifier
Applications
A2
B2
OS
RS-
OUT
less than
1µA, 4-Bump UCSP/SOT23,
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
o Tiny 1mm x 1mm x 0.6mm, 4-Bump UCSP or
+ Denotes a lead(Pb)-free/RoHS-compliant package.
Note: All devices are specified over the -40°C to +85°C
extended temperature range.
UCSP is a trademark of Maxim Integrated Products, Inc.
MAX9634TERS+
MAX9634FERS+
MAX9634HERS+
MAX9634WERS+
MAX9634TEUK+
MAX9634FEUK+
MAX9634HEUK+
MAX9634WEUK+
25V/V (MAX9634T)
50V/V (MAX9634F)
100V/V (MAX9634H)
200V/V (MAX9634W)
5-Pin SOT23 Packages
PART
GND
RS+
5
1
MAX9634T/F/H/W
SOT23
Ordering Information
GND
PIN-
PACKAGE
4 UCSP
4 UCSP
4 UCSP
4 UCSP
5 SOT23
5 SOT23
5 SOT23
5 SOT23
2
Pin Configurations
RS-
OUT
4
3
GAIN
(V/V)
100
200
100
200
25
50
25
50
Features
+AFHG
+AFHH
MARK
+AFHJ
+AFHI
+ACA
+ABX
+ABY
+ABZ
TOP
1

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MAX9634 Summary of contents

Page 1

... V voltage for very low voltage drop at SENSE 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. Cell Phones ...

Page 2

... MAX9634T/MAX9634F/ A MAX9634H -40°C < +25°C A MAX9634W -40°C < T MAX9634T MAX9634F G MAX9634H MAX9634W T = +25°C MAX9634T/MAX9634F/ A MAX9634H -40°C < +25°C A MAX9634W -40°C < T MAX9634T/MAX9634F/MAX9634H OUT MAX9634W Gain = 25 Gain = 50 OL Gain = 100 Gain = 200 = +25°C.) (Note 1) A MIN TYP MAX 0 ...

Page 3

Precision Current-Sense Amplifier ELECTRICAL CHARACTERISTICS (continued 3.6V RS+ RS- SENSE RS+ RS- PARAMETER SYMBOL OUT High Voltage V Small-Signal Bandwidth (Note 5) Output Settling Time Note 1: All devices are 100% ...

Page 4

UCSP/SOT23, Precision Current-Sense Amplifier ( 3.6V +25°C, unless otherwise noted.) RS+ RS- A INPUT OFFSET vs. COMMON-MODE VOLTAGE -30 -35 -40 -45 -50 - COMMON-MODE VOLTAGE (V) ...

Page 5

... Output Voltage. V SMALL-SIGNAL PULSE RESPONSE (GAIN = 25) 30mV V SENSE 20mV 1.5V V OUT 1V 25µs/div LARGE-SIGNAL PULSE RESPONSE (GAIN = 25) 60mV V SENSE 10mV 3V V OUT 0.5V 25µs/div Pin Description FUNCTION is proportional OUT SENSE RS+ MAX9634 toc13c 60mV 40mV 1.5V 1V MAX9634 toc14c 120mV 20mV 3V 0.5V . RS- 5 ...

Page 6

... R (see Table 1). Total gain = 25V/V for the OUT MAX9634T, 50V/V for the MAX9634F, 100V/V for the MAX9634H, and 200V/V for the MAX9634W. The output is protected from input overdrive by use of an output current-limiting circuit of 7mA (typical) and a 6V clamp protection circuit. Choose R ...

Page 7

... CC rating. Also, the sense resistor’s value might drift allowed to heat up excessively. The precision V the MAX9634 allows the use of small sense resistors to (max reduce power dissipation and reduce hot spots. Because of the high currents that flow through R ...

Page 8

... PCB techniques, bump-pad layout, and recommended reflow tempera- ture profile, as well as the latest information on reliability testing results, refer to Application Note 1891: Wafer- Level Packaging (WLP) and Its Applications . . PROCESS: BiCMOS TO WALL-CUBE/ CHARGER RS- LOAD R 1 MAX9634 V = 3.3V DD OUT µC ADC ADC Chip Information ...

Page 9

... Precision Current-Sense Amplifier For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status ...

Page 10

... Precision Current-Sense Amplifier For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status ...

Page 11

... Removed Power-Up Time parameter Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11 © ...

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