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參數(shù)資料
| 型號： | MAX5400 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | 通用總線功能 |
| 英文描述： | Dual, 256-Tap, Nonvolatile, I2C-Interface, Digital Potentiometers |
| 中文描述： | 雙路、256抽頭、非易失、I2C接口、數(shù)字電位器 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 250K |
| 代理商： | MAX5400 |
M
256-Tap SOT-PoT,
Low-Drift Digital Potentiometers in SOT23
6
_______________________________________________________________________________________
Detailed Description
The MAX5400/MAX5401 consists of 255 fixed resistors
in series between pins H and L. The potentiometer
wiper (pin W) can be programmed to access any one
of the 256 different tap points on the resistor string. The
MAX5400/MAX5401 uses a 3-wire serial data interface
to control the wiper tap position. This write-only inter-
face contains three inputs: Chip-Select (
CS
), Data In
(DIN), and Data Clock (SCLK). When
CS
is taken low,
data from the DIN pin is synchronously loaded into the
8-bit serial shift register on the rising edge of each
SCLK pulse. The MSB is shifted in first as shown in
Figure 4. Note that if
CS
is not kept low during the entire
data stream, the data will be corrupted and the device
will need to be reloaded. After all 8 data bits have been
loaded into the shift register, they are latched into the
decoder once
CS
is taken high. The decoder switches
the potentiometer wiper to the tap position that corre-
sponds to the 8-bit input data. Each resistor cell is
50k
/255 or 196.1
for the MAX5400 and 100k
/255
or 392.2
for the MAX5401.
The MAX5400/MAX5401 feature power-on reset (POR)
circuitry that sets the wiper to the midscale position at
power-up by loading a binary value of 128 into the 8-bit
latch.
The MAX5400/MAX5401 can be used as a variable
resistor by connecting pin W to either pin H or pin L.
POT REGISTER LOADED
1ST CLOCK PULSE
SCLK
DIN
MSB
LSB
D0
D1
D2
D3
D4
D5
D6
D7
8TH CLOCK PULSE
TIME
CS
Figure 2. Serial Interface Timing Diagram
SCLK
DIN
t
CSO
t
CSS
t
CL
t
CH
t
DS
t
DH
t
CP
t
CSH
t
CS1
t
CSW
CS
Figure 3. Detailed Serial Interface Timing Diagram
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5400EKA | 制造商:Maxim Integrated Products 功能描述:256-TAP SOTPOT, 50K OHM, LOW-DRIFT - Bulk |
| MAX5400EKA+ | 制造商:Maxim Integrated Products 功能描述:DGTL POTENTIOMETER 256POS 50KOHM SGL 8PIN SOT-23 - Bulk |
| MAX5400EKA+T | 功能描述:數(shù)字電位計 IC 256-Tap Low-Drift 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 |
| MAX5400EKA-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 |
| MAX5401EKA | 制造商:Maxim Integrated Products 功能描述:256-TAP SOTPOT 100K OHM LOW-DRIFT - Rail/Tube 制造商:Rochester Electronics LLC 功能描述: |
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