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TSH93ID Datasheet(Hoja de datos) 8 Page - STMicroelectronics

No. de Pieza. TSH93ID
Descripción  High-speed low power triple operational amplifier
Descarga  13 Pages
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Fabricante  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
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 8 page
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Printed circuit layout
TSH93
8/13
4
Printed circuit layout
As for any high frequency device, a few rules must be observed when designing the PCB to
get the best performance from this high speed op-amp.
From the most important to the least important point:
Each power supply lead must be bypassed to ground with a 10nF ceramic capacitor
very close to the device and a 10
μF capacitor.
To provide low inductance and low resistance common return, use a ground plane or
common point return for power and signal.
All leads must be wide and as short as possible especially for op-amp inputs. This is in
order to decrease parasitic capacitance and inductance.
Use small resistor values to decrease the time constant with parasitic capacitance.
Choose component sizes as small as possible (SMD).
On output, decrease capacitor load to avoid degradation in circuit stability which may cause
oscillation. You can also add a serial resistor in order to minimize its influence.
Figure 12.
Differential input impedance vs.
frequency
Figure 13.
Common input impedance vs.
frequency
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
1k
10k
100k
1M
10M
100M
Frequency (Hz)
1k
10k
100k
1M
10M
100M
Frequency (Hz)
120
100
80
60
40
20




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