TSV734IPT datasheet(16/29 Pages) STMICROELECTRONICS

16 / 29 page

Application information

TSV731, TSV732, TSV734

16/29

DocID023708 Rev 2

Application information

4.1

Operating voltages

The TSV73x 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 are very stable in the full

VCC range and several characterization curves show TSV73x 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 TSV731, TSV732, and TSV734 devices have a rail-to-rail input, and the input common

mode range is extended from VCC-- 0.1 V to VCC+ + 0.1 V.

4.3

Rail-to-rail output

The output levels of the TSV73x 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

Ω resistive load is connected to VCC/2.

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

sample size ensuring a Cpk (process capability index) greater than 1.33.

ΔVio

ΔT

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

max

Vio T

() Vio 25° C

()

–

T25

° C

–

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