參數(shù)資料
型號： MAX5499
廠商： Maxim Integrated Products, Inc.
元件分類： 通用總線功能
英文描述： 256-Tap, Nonvolatile, I2C-Interface, Digital Potentiometers
中文描述： 四2輸入與門
文件頁數(shù)： 12/20頁
文件大?。?/td> 876K
代理商： MAX5499
M
10-Bit, Dual, Nonvolatile, Linear-Taper
Digital Potentiometers
12
______________________________________________________________________________________
CODE (DECIMAL)
R
W
)
896
768
512
640
256
384
128
2
4
6
8
10
12
14
16
18
0
0
1024
50k
SCALES BY A FACTOR OF FIVE
Figure 4. Resistance from W_ to H_ vs. Code (10k
Voltage-
Divider)
CODE (DECIMAL)
R
W
)
896
768
512
640
256
384
128
2
4
6
8
10
12
14
16
18
0
0
1024
50k
SCALES BY A FACTOR OF FIVE
Figure 5. Resistance from W_ to L_ vs. Code (10k
Voltage-
Divider)
Detailed Description
The MAX5494–MAX5499 dual, nonvolatile, linear-taper,
programmable voltage-dividers and variable resistors
feature 1024 tap points (10-bit resolution) (see the
Functional Diagrams
). These devices consist of multi-
ple strings of equal resistor segments with a wiper con-
tact that moves among the 1024 effective tap points by
a 3-wire SPI-compatible serial interface. The
MAX5494/MAX5496/MAX5498 provide a total 10k
end-to-end resistance, and the MAX5495/MAX5497/
MAX5499 feature a 50k
end-to-end resistance. The
MAX5494/MAX5495/MAX5498/MAX5499 allow access
to the high, low, and wiper terminals for a standard volt-
age-divider configuration. Ensure that the terminal volt-
ages fall between V
SS
and V
DD
.
MAX5494/MAX5495/MAX5498/MAX5499
Programmable Voltage-Dividers
The MAX5494/MAX5495/MAX5498/MAX5499 program-
mable voltage-dividers provide a weighted average of
the voltage between the H_ and L_ inputs at the W_
output.
The MAX5494/MAX5495/MAX5498/MAX5499 program-
mable voltage-divider network provides up to 1024
division ratios between the H_ and L_ voltage. Ideally,
the V
L
voltage occurs at the wiper terminal when all
data bits are zeros and the V
H
voltage occurs at the
wiper terminal when all data bits are one (see the wiper
voltage equation). The step-size voltage (1 LSB) is
equal to the voltage applied across terminals H and L
divided by 2
10
. Calculate the wiper voltage V
W
as fol-
lows:
where D is the decimal equivalent of the 10 data bits
written (0 to 1023), V
HL
is the voltage difference between
the H_ and L_ terminals, and:
The MAX5494/MAX5498 provide a 10k
end-to-end
resistance value, while the MAX5495/MAX5499 feature a
50k
end-to-end resistance value.
Note that the pro-
grammable voltage-divider is not intended to be used
as a variable resistor.
Wiper current creates a nonlinear
voltage drop in series with the wiper. To ensure tempera-
ture drift remains within specifications, do not pull current
through the voltage-divider wiper. Connect the wiper to a
high-impedance node. Figures 4 and 5 show the behav-
ior of the programmable voltage-divider resistance from
W_ to H_ and W_ to L_, respectively. This does not apply
to the variable-resistor devices.
MAX5496–MAX5499 Variable Resistors
The MAX5496–MAX5499 provide a programmable resis-
tance from W_ to L_. The MAX5496/MAX5498 provide a
10k
end-to-end resistance value, while the
MAX5497/MAX5499 feature a 50k
end-to-end resis-
tance value. The programmable resolution of this
V
FSE
V
1024
V
ZSE
V
1024
FSE
HL
ZSE
HL
=
=
D
V
V
V
V
V
HL
FSE
1023
ZSE
L
ZSE
+
(
)
+
+
|
|
|
|
|
|
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MAX5499ETE 功能描述:數(shù)字電位計 IC RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel
MAX5499ETE+ 功能描述:數(shù)字電位計 IC 10-Bit Dual NV Linear-Taper RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel
MAX5499ETE+T 功能描述:數(shù)字電位計 IC 10-Bit Dual NV Linear-Taper RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel
MAX5499ETE-T 功能描述:數(shù)字電位計 IC RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel
MAX549AC/D 功能描述:數(shù)模轉(zhuǎn)換器- DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
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