OP249

–14–

REV. C

Figure 50. OP249’s Transient Recovery Time from a 1 mA

Load Transient to 0.01%

1/2

OP249

+15V

–15V

0.1 F

0.1 F

AGND

ANALOG

INPUT

ANALOG IN

DGND HBEN

CS

BUSY

CLK IN

ADC912

RD

10 F||0.1 F

10 F||0.1 F

+5V

–15V

1/2

OP249

+15V

–5V

0.1 F

0.1 F

10

10 F||0.1 F

REF02

GND

IN

OUT

Figure 51. OP249 Dual Amplifiers Provide Both Stable –5 V

Reference Input, and Buffers Input to ADC912

Figure 52. Worst Case Transient Voltage, at Analog In,

Occurs at the Half-Scale Point of the A/D. OP249 Buffers

the A/D Input from Figure 51, and Recovers in Less than

100 ns.