TSV6291 datasheet(12/23 Pages) STMICROELECTRONICS

12 / 23 page

Application information

TSV6290, TSV6290A, TSV6291, TSV6291A

12/23

Doc ID 17117 Rev 1

Application information

3.1

Operating voltages

The TSV6290 and TSV6291 can operate from 1.5 to 5.5 V. Their 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 TSV629x 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 TSV6290 and TSV6291 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 transition between the two pairs appears at

VCC+ -0.7 V. In the transition region, the performance of CMR, SVR, Vio and THD is slightly

degraded (as shown in Figure 17 and Figure 18 for Vio vs. Vicm).

The devices are guaranteed without phase reversal.

3.3

Rail-to-rail output

The operational amplifiers’ output levels 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.

3.4

Shutdown function (TSV6290)

The operational amplifier is enabled when the SHDN pin is pulled high. To disable the

amplifier, the SHDN must be pulled down to VCC-. When in shutdown mode, the amplifier’s

output is in a high impedance state. The SHDN pin must never be left floating, but tied to

VCC+ or VCC-.

Figure 17.

Input offset voltage vs. input

common mode at VCC = 1.5 V

Figure 18.

Input offset voltage vs. input

common mode at VCC = 5 V

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