9
LT1351
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
Small-Signal Transient
(A
V
= 1)
Small-Signal Transient
(A
V
= –1)
Small-Signal Transient
(A
V
= –1, C
L
= 1000pF)
1351 G331351 G321351 G31
Large-Signal Transient
(A
V
= 1)
Large-Signal Transient
(A
V
= –1)
Large-Signal Transient
(A
V
= 1, C
L
= 10,000pF)
1351 G361351 G351351 G34
APPLICATIONS INFORMATION
WUU
U
The LT1351 may be inserted directly into many high
speed amplifier applications improving both DC and AC
performance, provided that the nulling circuitry is re-
moved. The suggested nulling circuit for the LT1351 is
shown in Figure 1.
Layout and Passive Components
The LT1351 amplifier is easy to apply and tolerant of less
than ideal layouts. For maximum performance (for ex-
ample fast settling time) use a ground plane, short lead
lengths and RF-quality bypass capacitors (0.01µF to 0.1µF).
For high drive current applications use low ESR bypass
capacitors (1µF to 10µF tantalum). For details see Design
Note 50.
The parallel combination of the feedback resistor and gain
setting resistor on the inverting input can combine with
the input capacitance to form a pole which can cause
peaking or even oscillations. For feedback resistors greater
than 10k, a parallel capacitor of value, C
F
> (R
G
)(C
IN
/R
F
)
should be used to cancel the input pole and optimize
dynamic performance. For applications where the DC
–
+
1
2
1351 F01
3
100k
0.1µF
8
V
–
V
+
4
7
6
0.1µF
LT1351
Figure 1. Offset Nulling
