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參數資料
| 型號： | ADN2850ACP250 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 數字電位計 |
| 英文描述： | TERM,RING NON-INSUL. |
| 中文描述： | DUAL 250K DIGITAL POTENTIOMETER, 3-WIRE SERIAL CONTROL INTERFACE, 1024 POSITIONS, QCC16 |
| 封裝： | 5 X 5 MM, LFCSP-16 |
| 文件頁數： | 15/18頁 |
| 文件大小： | 270K |
| 代理商： | ADN2850ACP250 |
PRELIMINARY TECHNICAL DATA
Nonvolatile Memory Programmable Resistors
resistance can also be achieved by paralleling a discrete resistor
as shown in Figure 16. The equivalent resistance at a given
setting is approximated as
ADN2850
REV PrH, 13, AUG 2001
15
R
R
D
R
D
R
FS
WB
FS
51200
WB
eq
+
+
+
=
1024
51200
_
_
(5)
Figure 15. Reduce Resistance by half with linear adjustment
characteristics
Figure 16. Resistor Scaling with log adjustment characteristics
In this approach, the adjustment is not linear but logarithmic.
Users should also be aware the need for tolerance matching as
well as temperature coefficient matching of the components.
BASIC RDAC SPICE MODEL
RDAC
25k
C
W
=80pF
=8pF
Figure 17. RDAC Circuit Simulation Model for RDAC = 25 k
The internal parasitic capacitances and the external capacitive
loads dominate the ac characteristics of the RDACs. A general
parasitic simulation model is shown in Figure 7. Listing I
provides a macro model netlist for the 25 k
RDAC:
Listing I. Macro Model Net List for RDAC
.PARAM D=1024, RDAC=25E3
*
.SUBCKT RDAC (W,B)
*
RWB W B {D/1024*RDAC+50}
CW W 0 80E-12
CB B 0 8E-12
*
.ENDS RDAC
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ADN2850ACP250-RL7 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Nonvolatile Memory, Dual 1024 Position Programmable Resistors |
| ADN2850ACP25-RL7 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Nonvolatile Memory, Dual 1024 Position Programmable Resistors |
| ADN2850ARU | 制造商:Analog Devices 功能描述:DUAL 10-BIT PROGRAMMABLE NON-VOLATILE RESISTOR - Bulk |
| ADN2850ARU25 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Nonvolatile Memory, Dual 1024 Position Programmable Resistors |
| ADN2850ARU25-REEL7 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Nonvolatile Memory, Dual 1024 Position Programmable Resistors |
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