CW 85pF RDAC CIRCUIT SIMULATION MODEL The internal p" />
鍙冩暩(sh霉)璩囨枡
鍨嬭櫉锛� AD5280BRUZ20
寤犲晢锛� Analog Devices Inc
鏂囦欢闋佹暩(sh霉)锛� 17/28闋�
鏂囦欢澶у皬锛� 0K
鎻忚堪锛� IC DGTL POT 15V 20K 14-TSSOP
妯�(bi膩o)婧�(zh菙n)鍖呰锛� 96
鎺ョ墖锛� 256
闆婚樆锛堟瓙濮嗭級锛� 20k
闆昏矾鏁�(sh霉)锛� 1
婧害绯绘暩(sh霉)锛� 妯�(bi膩o)婧�(zh菙n)鍊� 30 ppm/°C
瀛樺劜鍣ㄩ鍨嬶細 鏄撳け
鎺ュ彛锛� I²C锛堣ō(sh猫)鍌欎綅鍧€锛�
闆绘簮闆诲锛� 4.5 V ~ 16.5 V锛�±4.5 V ~ 5.5 V
宸ヤ綔婧害锛� -40°C ~ 85°C
瀹夎椤炲瀷锛� 琛ㄩ潰璨艰
灏佽/澶栨锛� 14-TSSOP锛�0.173"锛�4.40mm 瀵級
渚涙噳(y墨ng)鍟嗚ō(sh猫)鍌欏皝瑁濓細 14-TSSOP
鍖呰锛� 绠′欢
鐢�(ch菐n)鍝佺洰閷勯爜闈細 787 (CN2011-ZH PDF)
AD5280/AD5282
Rev. C | Page 24 of
28
02
92
9-
0
68
CW
85pF
RDAC CIRCUIT SIMULATION MODEL
The internal parasitic capacitances and the external capacitive
loads dominate the ac characteristics of the RDACs. Configured
as a potentiometer divider, the 3 dB bandwidth of the AD5280
(20 k惟 resistor) measures 310 kHz at half scale. Figure 24
provides the Bode plot characteristics of the three available
resistor versions: 20 k惟, 50 k惟, and 200 k惟. A parasitic
simulation model is shown in Figure 65. A macro model net list
for the 20 k惟 RDAC is provided.
CA
25pF
CA
25pF
RDAC
20k
A
B
Figure 65. RDAC Circuit Simulation Model for RDAC = 20 k惟
MACRO MODEL NET LIST FOR RDAC
.PARAM D=256, RDAC=20E3
*
.SUBCKT DPOT (A,W,B)
*
CA
A
0
25E-12
RWA
A
W
{(1-D/256)*RDAC+60}
CW
W
0
55E-12
RWB
W
B
{D/256*RDAC+60}
CB
B
0
25E-12
*
.ENDS DPOT
鐩搁棞(gu膩n)PDF璩囨枡
PDF鎻忚堪
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