TSV639x, TSV639xA

Application information

Doc ID 16883 Rev 1

15/25

4.5

Optimization of DC and AC parameters

These devices use an innovative approach to reduce the spread of the main DC and AC

parameters. An internal adjustment achieves a very narrow spread of the current

4.6

Driving resistive and capacitive loads

These products are micropower, low-voltage operational amplifiers optimized to drive rather

large resistive loads, above 2 k

Ω.. For lower resistive loads, the THD level may significantly

increase.

The amplifiers have a relatively low internal compensation capacitor, making them very fast

while consuming very little. They are ideal when used in a non-inverting configuration or in

an inverting configuration in the following conditions.

●

IGainI

●

Gain

As these operational amplifiers are not unity gain stable, for a low closed-loop gain, it is

recommended to use the TSV63x (60 µA, 880 kHz) which is unity gain stable.

4.7

PCB layouts

For correct operation, it is advised to add 10 nF decoupling capacitors as close as possible

to the power supply pins.

4.8

Macromodel

Two accurate macromodels (with or without shutdown feature) of the TSV639x are available

on STMicroelectronics’ web site at www.st.com. This model is a trade-off between accuracy

and complexity (that is, time simulation) of the TSV639x operational amplifiers. It emulates

the nominal performances of a typical device within the specified operating conditions

mentioned in the datasheet. It also helps to validate a design approach and to select the

right operational amplifier, but it does not replace on-board measurements.

Table 9.

Related products

Part #

Icc (µA) at 5 V

GBP (MHz)

SR (V/µs)

Minimum gain for

stability

TSV62-2-3-4-5

29

0.42

0.14

1

TSV629-2-3-4-5

29

1.3

0.5

+11

TSV63-2-3-4-5

60

0.88

0.34

1

TSV639-2-3-4-5

60

2.4

1.1

+11