DAC8426BR AD [Analog Devices], DAC8426BR Datasheet - Page 8

• Manufacturer Part Number: DAC8426BR
• Description: Quad 8-Bit Voltage Out CMOS DAC Complete with Internal 10 V Reference
• Manufacturer: AD [Analog Devices]

DAC8426
The outputs can withstand an indefinite short-circuit to AGND
to typically 50 mA. The output may also be shorted to any volt-
age between V
exceed the device maximum power dissipation.
The amplifier’s emitter follower output stage consists of an in-
trinsic NPN bipolar transistor with a 400 A NMOS pull-down
current-source load connected to V
shown in Figure 4 enables the output amplifier to develop out-
put voltages very close to AGND. Only the negative supply of the
DD
and V
SS
; however, care must be taken to not
SS
. This circuit configuration
b) Settling Time Response (Negative Transition)
c) Settling Time Response (Positive Transition)
Figure 3. Dynamic Response
a) Large Signal
–8–
four output buffer amplifiers are connected to V
the DAC8426 from dual supplies (V
improves negative going output settling time near zero volts.
When operating single supply (V
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 . The buffer amplifier output current and voltage
characteristics are plotted in Figure 5.
Test Conditions, All Photos:
V
C
R
Digital Input Sequence 0, 255, 0
DD
REF
L
= 2 k
= +15 V
OUT = 10 F
DD
DD
= +15 V and V
= +15 V and V
SS
. Operating
SS
= 0 V) the
SS
= –5 V)
REV. C