5

Application information

5.1

Operating voltages

The TSB582 can operate from 4 to 36 V. The parameters are fully specified at 5 V, 12 V and 36 V power supplies.

However, the parameters are very stable over the full VCC range and several characterization curves show the

TSB582 device characteristics over the full operating range. Additionally, the main specifications are guaranteed

in extended temperature range from -40 to 125 °C.

5.2

ESD and input protection

Figure 27 illustrates an equivalent circuit of the TSB582’s protection against ESD events and high differential input

voltages. The TSB582 is designed for input common mode voltages ranging from the low rail up to Vcc – 1.5 V

with input currents Iin that must not exceed 27 mA. Input resistors in combination with a voltage limitation prevent

excessive differential voltages from damaging the differential input stage of the operational amplifier. However,

note that differential input voltages of more than Vid = 1.3 V (typical) cause a non-negligible current flow through

the input protection stage that might be considered when calculating the thermal budget of the amplifier. A high

input current in comparator mode might also impact the input signal at application level. In case the differential

input voltage of the application should exceed the absolute maximum rating of Vid = ± 42 V, it is recommended to

add external resistors to the design to keep the maximum current below Iin = 27 mA.

Figure 27. Equivalent internal ESD and input protection circuit

+

Vin+

R

Clamp

Vin-

Vout

Vid

Iin+

Iin-

750 Ω

R

750 Ω

5.3

EMI rejection

The electromagnetic interference (EMI) rejection ratio, or EMIRR, describes the EMI immunity of operational

amplifiers. An adverse effect that is common to many op amps is a change in the offset voltage as a result of RF

signal rectification. EMIRR is defined as follows:

EMIRR=20.log VinppΔVio

(1)

The TSB582 has been specially designed to minimize susceptibility to EMIRR and shows a low sensitivity. As

visible in the figure below, the EMI rejection ratio has been measured on both inputs and outputs, from 10 MHz to

2.4 GHz.

TSB582

Application information

DS13378 - Rev 2

page 17/34