Datasheet

Application information TSV620, TSV620A, TSV621, TSV621A
14/24 Doc ID 14912 Rev 2
3.5 Optimization of DC and AC parameters
This device uses an innovative approach to reduce the spread of the main DC and AC
parameters. An internal adjustment achieves a very narrow spread of current consumption
(29 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 = 350 kHz min, SR = 0.15 V/µs min).
3.6 Driving resistive and capacitive loads
These products are micro-power, low-voltage operational amplifiers optimized to drive rather
large resistive loads, above 5 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 a small in-series
resistor at the output can improve the stability of the device (see Figure 20 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 20. 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.
In-series resistor
(Ω)