Date Sheet

AD8510/AD8512/AD8513

Rev. K | Page 15 of 21

SETTLING TIME

Settling time is the time it takes the output of the amplifier to

reach and remain within a percentage of its final value after a

pulse is applied at the input. The AD8510/AD8512/AD8513

settle to within 0.01% in less than 900 ns with a step of 0 V to

10 V in unity gain. This makes each of these devices an excellent

choice as a buffer at the output of DACs whose settling time is

typically less than 1 μs.

In addition to the fast settling time and fast slew rate, low offset

voltage drift and input offset current maintain the full accuracy

of 12-bit converters over the entire operating temperature range.

OVERLOAD RECOVERY TIME

Overload recovery, also known as overdrive recovery, is the

time it takes the output of an amplifier to recover to its linear

region from a saturated condition. This recovery time is par-

ticularly important in applications where the amplifier must

amplify small signals in the presence of large transient voltages.

Figure 42 shows the positive overload recovery of the AD8510/

AD8512/AD8513. The output recovers in approximately 200 ns

from a saturated condition.

0V

–15V

200mV

0V

TIME (2µs/DIV)

VSY = ±15V

VIN = 200mV

AV = –100

RL = 10kΩ

Figure 42. Positive Overload Recovery

The negative overdrive recovery time shown in Figure 43 is less

than 200 ns.

In addition to the fast recovery time, the AD8510/AD8512/

AD8513 show excellent symmetry of the positive and negative

recovery times. This is an important feature for transient signal

rectification because the output signal is kept equally undistorted

throughout any given period.

TIME (2µs/DIV)

–200mV

0V

0V

+15V

VSY = ±15V

AV = –100

RL = 10kΩ

Figure 43. Negative Overload Recovery

CAPACITIVE LOAD DRIVE

The AD8510/AD8512/AD8513 are unconditionally stable at all

gains in inverting and noninverting configurations. Each device

is capable of driving a capacitive load of up to 1000 pF without

oscillation in unity gain using the worst case configuration.

However, as with most amplifiers, driving larger capacitive

loads in a unity-gain configuration can cause excessive

overshoot and ringing, or even oscillation. A simple snubber

network significantly reduces the amount of overshoot and

ringing. The advantage of this configuration is that the output

swing of the amplifier is not reduced, because RS is outside the

feedback loop.

7

4

6

AD8510

200mV

RS

CS

CL

VOUT

V+

V–

2

3

Figure 44. Snubber Network Configuration