LT1469CDF-PBF(RevA) Просмотр технического описания (PDF) - Linear Technology

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LT1469CDF-PBF
(Rev.:RevA)

Dual 90MHz, 22V/µs 16-Bit Accurate Operational Amplifi er

Linear Technology 

TYPICAL PERFORMANCE CHARACTERISTICS

Small-Signal Transient, AV = 1

Small-Signal Transient, AV = – 1

LT1469

VS = ±15V

1469 G37

VS = ±15V

1469 G38

Large-Signal Transient, AV = 1

Large-Signal Transient, AV = – 1

VS = ±15V

1469 G39

VS = ±15V

1469 G40

APPLICATIONS INFORMATION

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

1469fa

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