MAX9938 データシートの表示（PDF） - Maxim Integrated

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MAX9938

1µA, 4-Bump UCSP/SOT23, Precision Current-Sense Amplifier

Maxim Integrated 

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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