OP249ARC/883 查看數據表（PDF） - Analog Devices

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OP249ARC/883

Dual, Precision JFET High Speed Operational Amplifier

Analog Devices 

OP249

+IN

–IN

V+

APPLICATIONS INFORMATION

The OP249 represents a reliable JFET amplifier design, featur-

ing an excellent combination of dc precision and high speed. A

rugged output stage provides the ability to drive a 600 Ω load

VOUT and still maintain a clean ac response. The OP249 features a

large signal response that is more linear and symmetric than

previously available JFET input amplifiers—compare the

OP249’s large-signal response, as illustrated in Figure 41, to

other industry standard dual JFET amplifiers.

Typically, JFET amplifier’s stewing performance is simply specified

as just a number of volts/µs. There is no discussion on the qual-

ity, i e., linearity, symmetry, etc., of the stewing response.

V–

Figure 39. Simplified Schematic (1/2 OP249)

1/2

OP249

+3V

5k⍀

+18V

1/2

OP249

+3V

5k⍀

–18V

Figure 40. Burn-In Circuit

A) OP249

B) LT1057

C) AD712

Figure 41. Large-Signal Transient Response, AV = +1,

VIN = 20 V p-p, ZL = 2 kΩ//200 pF, VS = ±15 V

–10–

REV. C

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