lm715ch National Semiconductor Corporation, lm715ch Datasheet - Page 6

• Manufacturer Part Number: lm715ch
• Description: High Speed Operational Amplifier
• Manufacturer: National Semiconductor Corporation

Applications Information
Note For gain 10 compensation may be simplified by removing C2 C3 and
adding a 200 pF capacitor (C4) between Lead 7 and 10
Layout Instructions
Layout The layout should be such that stray capacitance
is minimal
Supplies The supplies should be adequately bypassed
Used of 0 1 mF high quality ceramic capacitors is recom-
mended
Note All lead numbers on this page apply to metal package
Closed Loop
1000
100
10 (Note)
1
Suggested Values of Compensation Capacitors vs
Gain
Frequency Compensation Circuit
Non-Inverting Compensation
Closed Loop Voltage Gain
Components Values
100 pF
500 pF
10 pF
50 pF
C1
2000 pF
500 pF
C2
TL H 10059 – 9
TL H 10059 – 10
1000 pF
1000 pF
250 pF
C3
6
Ringing Excessive ringing (long acquisition time) may oc-
cur with large capacitive loads This may be reduced by
isolating the capacitive load with a resistance of 100X
Large source resistances may also give rise to the same
problem and this may be decreased by the addition of a
capacitance across the feedback resistance A value of
around 50 pF for unity gain configuration and around 3 0 pF
for gain 10 should be adequate
Latch Up This may occur when the amplifier is used as a
voltage follower The inclusion of a diode between leads 6
and 2 with the cathode toward lead 2 is the recommended
preventive measure
Typical Applications
High Speed Integrator
TL H 10059 – 14
TL H 10059 – 13