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參數(shù)資料
| 型號： | MAX5496 |
| 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)： | 13/20頁 |
| 文件大?。?/td> | 876K |
| 代理商： | MAX5496 |
M
10-Bit, Dual, Nonvolatile, Linear-Taper
Digital Potentiometers
______________________________________________________________________________________
13
resistance is equal to the nominal end-to-end resis-
tance divided by 1024 (10-bit resolution). For example,
the programmable resolution is 9.8
and 48.8
for the
MAX5496/MAX5498 and the MAX5497/MAX5499,
respectively.
The 10-bit data in the 10-bit latch register selects the
wiper position from the 1024 possible positions, result-
ing in 1024 values for the resistance from W_ to L_.
Calculate the resistance from W_ to L_ (R
WL
) from the
formula below:
where D is decimal equivalent of the 10 data bits writ-
ten, R
W-L
is the nominal end-to-end resistance, and R
Z
is the zero-scale error. Table 1 shows R
WL
at selected
codes.
SPI-Compatible Serial Interface
The MAX5494–MAX5499 use a 3-wire, SPI-compatible,
serial data interface (Figure 6). This write-only interface
contains three inputs: chip-select (
CS
), data input
(DIN), and data clock (SCLK). Drive
CS
low to enable
the serial interface and clock data synchronously into
the shift register on each SCLK rising edge.
The WRITE commands (C1, C0 = 00 or 01) require 24
clock cycles to transfer the command and data (Figure
7a). The COPY commands (C1, C0 = 10 or 11) use
either eight clock cycles to transfer the command bits
(Figure 7b) or 24 clock cycles with 16 bits disregarded
by the device (Figure 7a).
After the loading of data into the shift register, drive
CS
high to latch the data into the appropriate control regis-
ter (specified by RA1 and RA0) and disable the serial
interface. Keep
CS
low during the entire serial data
stream to avoid corruption of the data. Table 2 shows
the register map.
Write Wiper Register
The “write wiper register” command (C1, C0 = 00) con-
trols the wiper positions. The 10 data bits (D9–D0) indi-
cate the position of the wiper. For example, if DIN =
000000 0000, the wiper moves to the position closest to
L_. If DIN = 11 1111 1111, the wiper moves closest to H_.
R
D
( )
=
D
R
R
WL
W L
Z
×
+
1023
END-TO-END RESISTANCE VALUE
10k
R
WL
(
)
70
80
5,070
10,070
50k
R
WL
(
)
110
160
25,110
50,110
CODE (DECIMAL)
0
1
512
1023
Table 1. R
WL
at Selected Codes
CS
t
CSO
t
CSS
t
CL
t
CH
t
DH
t
DS
t
CP
t
CSH
t
CSW
t
CS1
SCLK
DIN
Figure 6. SPI-Interface Timing Diagram
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5496ETE | 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 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| MAX5496ETE+ | 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 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| MAX5496ETE+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 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| MAX5496ETE-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 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| MAX5497ETE | 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 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
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