TSV630 - TSV631

Application information

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3.5

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 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).

3.6

Driving resistive and capacitive loads

These products are micro-power, 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.

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 bench and simulated with the

simulation model.

Figure 22.

In-series resistor vs. capacitive load

3.7

PCB layouts

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

to the power supply pins.