Application information

OA1MPA, OA2MPA, OA4MPA

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DocID025992 Rev 1

4

Application information

4.1

Operating voltages

The OA1MPA, OA2MPA, and OA4MPA series of devices can operate from 1.5 V to 5.5 V.

The parameters are fully specified for 1.8 V, 3.3 V, and 5 V power supplies. However, they

OA2MPA, and OA4MPA device characteristics at 1.5 V. In addition, the main specifications

are guaranteed in the extended temperature range from -40 °C to +125 °C.

4.2

Rail-to-rail input

The OA1MPA, OA2MPA, and OA4MPA devices have a rail-to-rail input, and the input

4.3

Rail-to-rail output

The output levels of the OA1MPA, OA2MPA, and OA4MPA operational amplifiers can go

close to the rails: to a maximum of 40 mV below the upper rail and to a maximum of 75 mV

above the lower rail when a 10 k

4.4

Input offset voltage drift over temperature

The maximum input voltage drift over the temperature variation is defined as the offset

variation related to offset value measured at 25 °C. The operational amplifier is one of the

main circuits of the signal conditioning chain, and the amplifier input offset is a major

contributor to the chain accuracy. The signal chain accuracy at 25 °C can be compensated

during production at application level. The maximum input voltage drift over temperature

enables the system designer to anticipate the effect of temperature variations.

The maximum input voltage drift over temperature is computed using Equation 1.

Equation 1

with T = -40 °C and 125 °C.

The datasheet maximum value is guaranteed by a measurement on a representative

V

io

T

------------

max

V

 V



–

T25

C

–

--------------------------------------------------

=