LT1469
TYPICAL PERFORMANCE CHARACTERISTICS
Small-Signal Transient, AV = 1
Small-Signal Transient, AV = –1
1469 G38
1469 G37
V
= 15V
V
= 15V
S
S
Large-Signal Transient, AV = 1
Large-Signal Transient, AV = –1
1469 G39
1469 G40
V
=
15V
V = 15V
S
S
APPLICATIONS INFORMATION
Layout and Passive Components
Board leakage can be minimized by encircling the input
circuitry with a guard ring operated at a potential close
to that of the inputs: for inverting configurations tie the
ring to ground, in noninverting connections tie the ring
to the inverting input (note the input capacitance will
increase which may require a compensating capacitor as
discussed below).
The LT1469 requires attention to detail in board layout
in order to maximize DC and AC performance. For best
AC results (for example, fast settling time) use a ground
plane, short lead lengths and RF quality bypass capacitors
(0.01μF to 0.1μF) in parallel with low ESR bypass capaci-
tors(1μFto10μFtantalum). ForbestDCperformance, use
“star” grounding techniques, equalize input trace lengths
and minimize leakage (e.g., 1.5GΩ of leakage between an
input and a 15V supply will generate 10nA—equal to the
Microvolt level error voltages can also be generated in
the external circuitry. Thermocouple effects caused by
temperature gradients across dissimilar metals at the
contacts to the inputs can exceed the inherent drift of
maximum I – specification).
B
1469fa
11
Linear [ Linear ]
