LT1469CS8 datasheet(11/20 Pages) LINER

11 / 20 page

LT1469

1469fa

TYPICAL PERFORMANCE CHARACTERISTICS

Small-Signal Transient, AV = 1

Small-Signal Transient, AV = – 1

Large-Signal Transient, AV = 1

Large-Signal Transient, AV = – 1

Layout and Passive Components

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 (1μF to 10μF tantalum). For best DC performance, 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

maximum IB– speciﬁcation).

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).

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

APPLICATIONS INFORMATION

VS = ±15V

1469 G37

VS = ±15V

1469 G38

VS = ±15V

1469 G39

VS = ±15V

1469 G40

LT1469CS8 Datasheet(PDF) 11 Page - Linear Technology