5

Application information

5.1

Operating voltages

The amplifiers of the TSV52x, TSV52xA series can operate from 2.7 V to 5.5 V. Their parameters are fully

specified for 2.7 V, 3.3 V and 5 V power supplies. However, the parameters are very stable in the full VCC range,

and several characterization curves show the TSV52x, TSV52xA device characteristics at 2.7 V. Additionally, the

main specifications are guaranteed in extended temperature ranges from -40 to +125 °C.

5.2

Common-mode voltage range

The TSV52x, TSV52xA devices are built with two complementary PMOS and NMOS input differential pairs. The

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.

The N channel pair is active for input voltage close to the positive rail typically (VCC+ - 0.7 V) to 100 mv above the

positive rail.

The P channel pair is active for input voltage close to the negative rail typically 100 mV below the negative rail to

VCC- + 0.7 V.

And between VCC- + 0.7 V and VCC+ - 0.7 V both N and P pairs are active.

When both pairs work together it allows to increase the speed of the TSV52x, TSV52xA devices. This architecture

improves the merit factor of the whole device. In the transition region, the performance of CMR, SVR, Vio (Figure

25 and Figure 26) and THD is slightly degraded.

Figure 25. Input offset voltage vs. input common-mode at

VCC = 2.7 V

0.0

0.0

0.3

0.6

0.6

0.9

1.2

1.2

1.5

1.8

1.8

2.1

2.4

2.4

2.7

-0.8

-0.8

-0.7

-0.6

-0.6

-0.5

-0.4

-0.4

-0.3

-0.2

-0.2

-0.1

0.0

0.0

Vicm (V)

AM00481

Figure 26. Input offset voltage vs. input common-mode at

VCC = 5.5 V

0.0 0.5 0.9 1.4 1.8 2.3 2.7 3.2 3.6 4.0 4.5 5.0 5.4

-0.8

-0.7

-0.6

-0.5

-0.4

-0.3

-0.2

-0.1

0.0

0.1

Vicm (V)

AM00482

5.3

Rail-to-rail input

The TSV52x, TSV52xA series are guaranteed without phase reversal as shown in Figure 28.

It is extremely important that the current flowing in the input pin does not exceed 10 mA. In order to limit this

current, a serial resistor can be added on the Vin path.

TSV521, TSV522, TSV524,TSV521A, TSV522A, TSV524A

Application information

DS8862 - Rev 4

page 13/29