Application information

TSV632, TSV632A, TSV633, TSV633A, TSV634,

TSV634A, TSV635, TSV635A

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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

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.