Datasheet

DocID15242 Rev 5 15/26
TSV630, TSV630A, TSV631, TSV631A Application information
26
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 micro-power, 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 23 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 23. 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.
In-series resistor
(Ω)