參數(shù)資料
型號： DAC8426FS
廠商： ANALOG DEVICES INC
元件分類： DAC
英文描述： Quad 8-Bit Voltage Out CMOS DAC Complete with Internal 10 V Reference
中文描述： QUAD, PARALLEL, 8 BITS INPUT LOADING, 3 us SETTLING TIME, 8-BIT DAC, PDSO20
封裝： SOL-20
文件頁數(shù)： 8/12頁
文件大?。?/td> 289K
代理商： DAC8426FS
DAC8426
–8–
REV. C
a) Large Signal
b) Settling Time Response (Negative Transition)
c) Settling Time Response (Positive Transition)
Figure 3. Dynamic Response
T he outputs can withstand an indefinite short-circuit to AGND
to typically 50 mA. T he output may also be shorted to any volt-
age between V
DD
and V
SS
; however, care must be taken to not
exceed the device maximum power dissipation.
T he amplifier’s emitter follower output stage consists of an in-
trinsic NPN bipolar transistor with a 400
μ
A NMOS pull-down
current-source load connected to V
SS
. T his circuit configuration
shown in Figure 4 enables the output amplifier to develop out-
put voltages very close to AGND. Only the negative supply of the
four output buffer amplifiers are connected to V
SS
. Operating
the DAC8426 from dual supplies (V
DD
= +15 V and V
SS
= –5 V)
improves negative going output settling time near zero volts.
When operating single supply (V
DD
= +15 V and V
SS
= 0 V) the
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
. T he buffer amplifier output current and voltage
characteristics are plotted in Figure 5.
Test Conditions, All Photos:
V
DD
= +15 V
C
REF
OUT = 10
m
F
R
L
= 2 k
V
Digital Input Sequence 0, 255, 0
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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