TSV63X datasheet(16/31 Pages) STMICROELECTRONICS

16 / 31 page

Application information

TSV632, TSV632A, TSV633, TSV633A, TSV634,

TSV634A, TSV635, TSV635A

16/31

DocID15688 Rev 6

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

consumption value, such as GBP, SR, and Avd, benefit from this narrow dispersion. All

parts present a similar speed and the same behavior in terms of stability. In addition, the

minimum values of GBP and SR are guaranteed (GBP = 730 kHz minimum and

SR = 0.25 V/µs minimum).

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.

In a follower configuration, these operational amplifiers can drive capacitive loads up to

100 pF with no oscillations. When driving larger capacitive loads, adding an in-series

resistor at the output can improve the stability of the devices (see Figure 22 for

recommended in-series resistor values). Once the in-series resistor value has been

selected, the stability of the circuit should be tested on the bench and simulated with the

simulation model.

Figure 22: In-series resistor vs. capacitive load

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.

TSV63X Fiches technique(PDF) 16 Page - STMicroelectronics