MAX9938 데이터 시트보기 (PDF) - Maxim Integrated
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MAX9938 Datasheet PDF : 14 Pages
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1µA, 4-Bump UCSP/SOT23,
Precision Current-Sense Amplifier
Bidirectional Application
Battery-powered systems may require a precise bidi-
rectional current-sense amplifier to accurately monitor
the battery’s charge and discharge currents.
Measurements of the two separate outputs with respect
to GND yields an accurate measure of the charge and
discharge currents respectively (Figure 3).
UCSP Applications Information
For the latest application details on UCSP construction,
dimensions, tape carrier information, PCB techniques,
bump-pad layout, and recommended reflow tempera-
ture profile, as well as the latest information on reliabili-
ty testing results, refer to the Application Note 1891:
Wafer-Level Packaging (WLP) and Its Applications
available on Maxim’s website at www.maxim-
ic.com/ucsp.
VBATT = 1.6V TO 28V
ILOAD
RSENSE
RS+
RS-
R1
R1
RS+
RS-
R1
R1
TO WALL-CUBE/
CHARGER
LOAD
P
ROUT 10kΩ
GND
P
MAX9938
OUT
ROUT 10kΩ
GND
MAX9938
VDD = 3.3V
OUT
μC
ADC
ADC
Figure 3. Bidirectional Application
PROCESS: BiCMOS
Chip Information
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