DAC8426

–8–

REV. C

a) Large Signal

b) Settling Time Response (Negative Transition)

c) Settling Time Response (Positive Transition)

Figure 3. Dynamic Response

The outputs can withstand an indefinite short-circuit to AGND

to typically 50 mA. The output may also be shorted to any volt-

exceed the device maximum power dissipation.

The amplifier’s emitter follower output stage consists of an in-

trinsic NPN bipolar transistor with a 400

µA NMOS pull-down

shown in Figure 4 enables the output amplifier to develop out-

put voltages very close to AGND. Only the negative supply of the

improves negative going output settling time near zero volts.

output sink current decreases as the output approaches zero

voltage. Within 200 mV of AGND (single-supply operation) the

internal sinking capability appears resistive at a value of approxi-

mately 1200

Ω. The buffer amplifier output current and voltage

characteristics are plotted in Figure 5.

Test Conditions, All Photos:

Digital Input Sequence 0, 255, 0