TSV621 datasheet(10/18 Pages) STMICROELECTRONICS

10 / 18 page

Application information

TSV621

10/18

Application information

3.1

Operating voltages

The TSV621 can operate from 1.5 to 5.5 V. Its parameters are fully specified for 1.8-, 3.3-

and 5-V power supplies. However, the parameters are very stable in the full VCC range and

several characterization curves show the TSV621 characteristics at 1.5 V. Additionally, the

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

3.2

Rail-to-rail input

The TSV621 is built with two complementary PMOS and NMOS input differential pairs. The

device has a rail-to-rail input, and the input common mode range is extended from

VDD -0.1 V to VCC +0.1 V. The transition between the two pairs appear at VCC -0.7 V. In the

transition region, the performance of CMRR, PSRR, Vio and THD is slightly degraded (as

shown in Figure 14 and Figure 15 for Vio vs. Vicm).

The device is guaranteed without phase reversal.

3.3

Rail-to-rail output

The operational amplifier’s output level can go close to the rails: 35 mV maximum above and

below the rail when connected to a 10 k

Ω resistive load to VCC/2.

Figure 14.

Input offset voltage vs input

common mode at VCC = 1.5 V

Figure 15.

Input offset voltage vs input

common mode at VCC = 5 V

-0.2

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

-0.5

-0.4

-0.3

-0.2

-0.1

0.0

0.1

0.2

0.3

0.4

0.5

Input Common Mode Voltage (V)

0.0

1.0

2.0

3.0

4.0

5.0

-0.4

-0.2

0.0

0.2

0.4

Input Common Mode Voltage (V)

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