參數資料
| 型號： | ISL95311UIU10Z-TK |
| 廠商： | Intersil |
| 文件頁數： | 9/11頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC XDCP 128-TAP 50KOHM 10-MSOP |
| 產品培訓模塊： | Digitally Controlled Potentiometers |
| 標準包裝： | 1,000 |
| 系列： | XDCP™ |
| 接片： | 128 |
| 電阻（歐姆）： | 50k |
| 電路數： | 1 |
| 溫度系數： | 標準值 ±45 ppm/°C |
| 存儲器類型： | 非易失 |
| 接口： | I²C（設備位址） |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°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： | 帶卷 (TR) |
7
FN8084.1
February 6, 2008
On applying power to the ISL95311, the VCC supply should
have a monotonic ramp to the specified operating voltage. It
is important that once VCC reaches 1V that it increases to at
least 2.5V in less than 7.5ms (0.2V/ms). The ramp rate
before and after these thresholds is not important.
VCC must be applied prior to, or simultaneously, with V+.
Under no condition should V+ be applied without VCC. While
the sequence of applying V+ and VCC to the ISL95311 does
not affect the proper recall of the wiper position, applying V+
before VCC powers the electronic switches of the DCP
before the electronic switch control signals are applied. This
can result in multiple electronic switches being turned on,
which could load the power supply and cause brief,
unexpected potentiometer wiper settings.
To prevent unknown wiper positions on the ISL95311 on
power-down, it is recommended that V+ turn off before or
simultaneously with VCC. If V+ remains on after VCC turns
off, the wiper position can remain unchanged from its
previous setting or it can go to an undefined state.
DCP Description
The DCP is implemented with a combination of resistor
elements and CMOS switches. The physical ends of the
DCP are equivalent to the fixed terminals of a mechanical
potentiometer (RH and RL pins). The RW pin 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 a 7-bit volatile Wiper
Register (WR). When the WR contains all zeroes (00h), the
wiper terminal (RW) is closest to its “Low” terminal (RL).
When the WR contains all ones (7Fh), the wiper terminal
(RW) is closest to its “High” terminal (RH). As the value of the
WR increases from all zeroes (00h) to all ones (7Fh), 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 ISL95311 is being powered up, the WR is reset to
20h (64 decimal), which locates the RW at the center between
RL and RH. Soon after the power supply voltage becomes
large enough for reliable non-volatile memory reading, the
ISL95311 reads the value stored on a non-volatile Initial Value
Register (IVR) and loads it into the WR.
The WR and IVR can be read from or written to directly using
the I2C serial interface as described in the following
sections.
Memory Description
The ISL95311 contains 1 non-volatile byte know as the Initial
Value Register (IVR). It is accessed by the I2C interface
operations with Address 00h. The IVR contains the value
which is loaded into the Volatile Wiper Register (WR) at
power-up.
The volatile WR, and the non-volatile IVR of a DCP are
accessed with the same address.
The Access Control Register (ACR) determines which word
at address 00h is accessed (IVR or WR). The volatile ACR
must be set as follows:
When the ACR is all zeroes, which is the default at power-up:
A read operation to address 0 outputs the value of the
non-volatile IVR.
A write operation to address 0 writes the identical values
to the WR and IVR of the DCP.
When the ACR is 80h:
A read operation to address 0 outputs the value of the
volatile WR.
A write operation to address 0 only writes to the
volatile WR.
It is not possible to write to an IVR without writing the same
value to its WR.
00h and 80h are the only values that should be written to
address 2. All other values are reserved and must not be
written to address 2.
The ISL95311 is pre-programmed with 40h in the IVR.
I2C Serial Interface
The ISL95311 supports a bidirectional bus oriented protocol.
The protocol defines any device that sends data onto the
bus as a transmitter and the receiving device as the receiver.
The device controlling the transfer is a master and the
device being controlled is the slave. The master always
initiates data transfers and provides the clock for both
transmit and receive operations. Therefore, the ISL95311
operates as a slave device in all applications.
All communication over the I2C interface is conducted by
sending the MSB of each byte of data first.
Protocol Conventions
Data states on the SDA line can change only during SCL
LOW periods. SDA state changes during SCL HIGH are
reserved for indicating START and STOP conditions (see
Figure 1). On power-up of the ISL95311, the SDA pin is in
the input mode.
All I2C interface operations must begin with a START
condition, which is a HIGH to LOW transition of SDA while
TABLE 1. MEMORY MAP
ADDRESS
NON-VOLATILE
VOLATILE
2-
ACR
1
Reserved
0IVR
WR
WR: Wiper Register, IVR: Initial value Register.
ISL95311
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| ISL95311WIU10Z | 功能描述:IC XDCP 128-TAP 10KOHM 10-MSOP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 數字電位器 系列:XDCP™ 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 接片:256 電阻（歐姆）:100k 電路數:2 溫度系數:標準值 35 ppm/°C 存儲器類型:易失 接口:6 線串行（芯片選擇，遞增，增/減） 電源電壓:2.6 V ~ 5.5 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:14-TSSOP 包裝:帶卷 (TR) |
| ISL95311WIU10Z-TK | 功能描述:IC POT DGTL 10K OHM 10-MSOP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 數字電位器 系列:XDCP™ 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 接片:256 電阻（歐姆）:100k 電路數:1 溫度系數:標準值 35 ppm/°C 存儲器類型:非易失 接口:3 線串口 電源電壓:2.7 V ~ 5.25 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WDFN 裸露焊盤 供應商設備封裝:8-TDFN-EP（3x3） 包裝:剪切帶 (CT) 產品目錄頁面:1399 (CN2011-ZH PDF) 其它名稱:MAX5423ETA+TCT |
| ISL95710UIU10Z | 功能描述:IC POT DGTL 50K OHM 10-MSOP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 數字電位器 系列:XDCP™ 標準包裝:3,000 系列:DPP 接片:32 電阻（歐姆）:10k 電路數:1 溫度系數:標準值 300 ppm/°C 存儲器類型:非易失 接口:3 線串行（芯片選擇，遞增，增/減） 電源電壓:2.5 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WFDFN 裸露焊盤 供應商設備封裝:8-TDFN（2x3） 包裝:帶卷 (TR) |
| ISL95710UIU10Z-T | 功能描述:IC POT DGTL 50K OHM 10-MSOP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 數字電位器 系列:XDCP™ 標準包裝:3,000 系列:DPP 接片:32 電阻（歐姆）:10k 電路數:1 溫度系數:標準值 300 ppm/°C 存儲器類型:非易失 接口:3 線串行（芯片選擇，遞增，增/減） 電源電壓:2.5 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WFDFN 裸露焊盤 供應商設備封裝:8-TDFN（2x3） 包裝:帶卷 (TR) |
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