4

Application information

4.1

Operating voltages

The TSB571 and TSB572 can operate from 4 V to 36 V. The parameters are fully specified for 4 V, 12 V, and 36 V

guaranteed in extended temperature ranges from -40 to 125 °C.

4.2

Input pin voltage ranges

The TSB571 and TSB572 have an internal ESD diode protection on the inputs. These diodes are connected

between the inputs and each supply rail to protect the input transistors from electrical discharge.

If the input pin voltage exceeds the power supply by 0.2 V, the ESD diodes become conductive and excessive

current can flow through them. Without limitation this over current can damage the device.

In this case, it is important to limit the current to 10 mA, by adding resistance on the input pin, as shown in

Figure 37. Input current limitation.

Vin

R

16 V

Vout

+

+

-

-

4.3

Rail-to-rail input

4.4

Input offset voltage drift over temperature

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

∆T

max

( ) V

(

)

–

T 25 °C

–

=

°C

where T = -40 °C and 125 °C.

The TSB571 and TSB572 datasheet maximum value is guaranteed by measurements on a representative sample

TSB571, TSB572

Application information

DS11248 - Rev 7

page 17/31