TSV6390, TSV6390A, TSV6391, TSV6391A

Application information

DocID17118 Rev 2

13/22

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

consumption (60 µA typical, min/max at ±17 %). Parameters linked to 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

kΩ. For lower resistive loads, the THD level may

significantly increase.

These operational 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 ≥ 3 in an inverting configuration (C

Gain ≥ 4 in a non-inverting configuration (C

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

recommended to use the TSV62x (29 µA, 420 kHz) or TSV63x (60 µA, 880 kHz) which are

unity gain stable.

Table 8: Related products

Part #

Icc (µA) at 5 V

GBP (MHz)

SR (V/µs)

Minimum gain for stability

TSV620-1

29

0.42

0.14

1

TSV6290-1

29

1.3

0.5

11

TSV630-1

60

0.88

0.34

1

TSV6390-1

60

2.4

1.1

11

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

An accurate macromodel of the TSV6390 and TSV6391 is 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.