LF298-MIL Datasheet, PDF (23/28 Pages) Texas Instruments – Monolithic Sample-and-Hold Circuits

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LF298-MIL
SNOSD57 – JUNE 2017
9.2.14 Capacitor Hysteresis Compensation
The LF298-MIL devices may be used for capacitor hysteresis compensation as shown in Figure 40.
*Select for time constant C1 = τ/100 kΩ
**Adjust for amplitude
Figure 40. Capacitor Hysteresis Compensation
10 Power Supply Recommendations
The LF298-MIL devices are rated for a typical supply voltage of ±15 V. To achieve noise immunity as appropriate
to the application, it is important to use good printed-circuit-board layout practices for power supply rails and
planes, as well as using bypass capacitors connected between the power supply pins and ground. All bypass
capacitors must be rated to handle the supply voltage and be decoupled to ground. TI recommends to decouple
each supply with two capacitors; a small value ceramic capacitor (approximately 0.1 μF) placed close to the
supply pin in addition to a large value Tantalum or Ceramic (≥ 10 μF). The large capacitor can be shared by
more than one device if necessary. The small ceramic capacitor maintains low supply impedance at higher
frequencies while the large capacitor will act as the charge bucket for fast load current spikes at the op amp
output. The combination of these capacitors will provide supply decoupling and will help maintain stable
operation for most loading conditions.
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