MAX9643 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – 60V High-Speed Precision Current-Sense Amplifier

19-5889; Rev 0; 8/11
EVALUATION KIT AVAILABLE
MAX9643
60V High-Speed Precision Current-Sense Amplifier
General Description
The MAX9643 is a high-speed 60V precision unidirec-
tional current-sense amplifier ideal for a wide variety of
power-supply control applications. Its high signal band-
width allows its use within DC-DC switching converter
power-supply control loops with minimal phase delay.
The IC also features 50FV (max) precision input offset
voltage, allowing small sense resistors to be used in
applications where efficiency is important and when wide
dynamic-range current measurement is needed.
High DC CMRR and AC CMRR make it easy to use in
a wide variety of aggressive environments. The device
is available in fixed gains of 2.5V/V and 10V/V. It is also
available in a small, 8-pin TDFN (2mm x 3mm) package
and is rated over the -40NC to +125NC temperature range.
Applications
Industrial and Automotive Power Supplies
GSM Base Station Power Supply
High-Brightness LED Control
Automotive Engine Control
H-Bridge Motor Control
Benefits and Features
S Supports High-Voltage Applications
 Wide Input VCM = -1.5V to +60V
S Delivers High-Speed Operation
 15MHz Bandwidth
S Increases System Accuracy
 Precision VOS = 50µV (max)
S -40NC to +125NC Specified Temperature Range
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part,
refer to www.maxim-ic.com/MAX9643.related.
Typical Operating Circuit
RS+
RS-
CP1
CP2
OUT
V_EE
V_CC
MAX9643
GND
BOOST
POWER-SUPPLY
CONTROL
LOAD
����������������������������������������������������������������� 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.