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參數(shù)資料
| 型號： | ISL23315UFUZ-T7A |
| 廠商： | Intersil |
| 文件頁數(shù)： | 6/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DGTL POT 256POS 50K 10MSOP |
| 產品培訓模塊： | Solutions for Industrial Control Applications |
| 標準包裝： | 1 |
| 系列： | XDCP™ |
| 接片： | 256 |
| 電阻（歐姆）： | 50k |
| 電路數(shù)： | 1 |
| 溫度系數(shù)： | 標準值 85 ppm/°C |
| 存儲器類型： | 易失 |
| 接口： | I²C（設備位址） |
| 電源電壓： | 1.2 V ~ 5.5 V，1.7 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 10-TFSOP，10-MSOP（0.118"，3.00mm 寬） |
| 供應商設備封裝： | 10-MSOP |
| 包裝： | 標準包裝 |
| 其它名稱： | ISL23315UFUZ-T7ADKR |
ISL23315
14
FN7778.1
August 15, 2011
DEVICE ADDRESS (A1, A0)
The address inputs are used to set the least significant 2 bits of
the 7-bit I2C interface slave address. A match in the slave
address serial data stream must match with the Address input
pins in order to initiate communication with the ISL23315. A
maximum of four ISL23315 devices may occupy the I2C serial
bus (see Table 3).
VLOGIC
This is an input pin, that supplies internal level translator for
serial bus operation from 1.2V to 5.5V.
Principles of Operation
The ISL23315 is an integrated circuit incorporating one DCP with
its associated registers and an I2C serial interface providing
direct communication between a host and the potentiometer.
The resistor array is comprised of individual resistors connected
in series. At either end of the array and between each resistor is
an electronic switch that transfers the potential at that point to
the wiper.
The electronic switches on the device operate in a “make before
break” mode when the wiper changes tap positions.
Voltage at any DCP pins, RH, RL or RW, should not exceed VCC
level at any conditions during power-up and normal operation.
The VLOGIC pin needs to be connected to the I2C bus supply
which allows reliable communication with the wide range of
microcontrollers and independent of the VCC level. This is
extremely important in systems where the master supply has
lower levels than DCP analog supply.
DCP Description
The DCP is implemented with a combination of resistor elements
and CMOS switches. The physical ends of each DCP are
equivalent to the fixed terminals of a mechanical potentiometer
(RH and RL pins). The RW pin of the DCP is connected to
intermediate nodes, and is equivalent to the wiper terminal of a
mechanical potentiometer. The position of the wiper terminal
within the DCP is controlled by an 8-bit volatile Wiper Register
(WR). When the WR of a DCP contains all zeroes (WR[7:0]= 00h),
its wiper terminal (RW) is closest to its “Low” terminal (RL). When
the WR register of a DCP contains all ones (WR[7:0]= FFh), its
wiper terminal (RW) is closest to its “High” terminal (RH). As the
value of the WR increases from all zeroes (0) to all ones (255
decimal), the wiper moves monotonically from the position
closest to RL to the position closest to RH. At the same time, the
resistance between RW and RL increases monotonically, while
the resistance between RH and RW decreases monotonically.
While the ISL23315 is being powered up, the WR is reset to 80h
(128 decimal), which locates RW roughly at the center between
RL and RH.
The WR can be read or written to directly using the I2C serial
interface as described in the following sections.
Memory Description
The ISL23315 contains two volatile 8-bit registers: Wiper Register
(WR) and Access Control Register (ACR). The memory map of
ISL23315 is shown in Table 1. The Wiper Register (WR) at address 0
contains current wiper position. The Access Control Register (ACR)
at address 10h contains information and control bits described
in Table 2.
Shutdown Function
The SHDN bit (ACR[6]) disables or enables shutdown mode for all
DCP channels simultaneously. When this bit is 0, i.e., DCP is forced
to end-to-end open circuit and RW is connected to RL through a
2k serial resistor, as shown in Figure 25. Default value of the
SHDN bit is 1.
In the shutdown mode, the RW terminal is shorted to the RL
terminal with around 2k resistance, as shown in Figure 25. When
the device enters shutdown, all current DCP WR settings are
maintained. When the device exits shutdown, the wipers will return
to the previous WR settings after a short settling time (see
Figure 26).
In shutdown mode, if there is a glitch on the power supply which
causes it to drop below 1.3V for more than 0.2s to 0.4s, the
wipers will be RESET to their mid position. This is done to avoid
an undefined state at the wiper outputs.
TABLE 1. MEMORY MAP
ADDRESS
(hex)
VOLATILE
REGISTER NAME
DEFAULT SETTING
(hex)
10
ACR
40
0WR
40
TABLE 2. ACCESS CONTROL REGISTER (ACR)
BIT #
7
6
5
4
32
10
NAME/
VALUE
0SHDN
0
00
FIGURE 25. DCP CONNECTION IN SHUTDOWN MODE
2k
RW
RL
RH
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參數(shù)描述 |
|---|---|
| ISL23315UFUZ-TK | 功能描述:數(shù)字電位計 IC 256 TAP VOLATILE I2C DL FL RNG DCP 10LD 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 |
| ISL23315WFRUZ-T7A | 功能描述:數(shù)字電位計 IC 256 TAP VOLATILE I2C FL RNG INC DCP 21X16 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 |
| ISL23315WFRUZ-TK | 功能描述:數(shù)字電位計 IC 256 TAP VOLATILE I2C FL RNG INC DCP 21X16 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 |
| ISL23315WFUZ | 功能描述:數(shù)字電位計 IC 256 TAP VOLATILE I2C DL FL RNG DCP 10LD 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 |
| ISL23315WFUZ-T7A | 功能描述:數(shù)字電位計 IC 256 TAP VOLATILE I2C DL FL RNG DCP 10LD 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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