MAX9944 データシートの表示（PDF） - Maxim Integrated

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MAX9944

High-Voltage, Precision, Low-Power Op Amps

Maxim Integrated 

MAX9943/MAX9944

High-Voltage, Precision, Low-Power Op Amps

Input Common Mode and Output Swing

The MAX9943/MAX9944 input common-mode range can

swing to the negative rail VEE. The output voltage can

swing to both the positive VCC and the negative VEE

rails if the output stage is not heavily loaded. These two

features are very important for applications where the

MAX9943/MAX9944 are used with a single-supply (VEE

connected to ground). One of the applications that can

benefit from these features is when the single-supply op

amp is driving an ADC.

Input Differential Voltage Protection

During normal op-amp operation, the inverting and

noninverting inputs of the MAX9943/MAX9944 are at

essentially the same voltage. However, either due to fast

input voltage transients or due to other fault conditions,

these pins can be forced to be at two different voltages.

Internal back-to-back diodes and series resistors protect

the inputs from an excessive differential voltage (see

Figure 2). Therefore, IN+ and IN- can be any voltage

within the range shown in the absolute maximum rating.

Note the protection time is still dependent on the package

thermal limits.

+15V

-15V

VREF

DAC

MAX9944

-15V

Figure 3. Typical ±20mA Current-Source in Loop-Powered Systems

RSENSE

RLOAD

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