- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄9262 > ISL22326UFV14Z-TK (Intersil)IC POT DGTL 128TP LN LP 14-TSSOP PDF資料下載
參數(shù)資料
| 型號： | ISL22326UFV14Z-TK |
| 廠商： | Intersil |
| 文件頁數(shù)： | 2/15頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC POT DGTL 128TP LN LP 14-TSSOP |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 系列： | XDCP™ |
| 接片： | 128 |
| 電阻（歐姆）： | 50k |
| 電路數(shù)： | 2 |
| 溫度系數(shù)： | 標(biāo)準(zhǔn)值 ±80 ppm/°C |
| 存儲器類型： | 非易失 |
| 接口： | I²C（設(shè)備位址） |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 14-TSSOP |
| 包裝： | 帶卷 (TR) |
10
FN6176.2
September 8, 2009
Pin Descriptions
Potentiometers Pins
RHI AND RLI (i = 0, 1)
The high (RHi) and low (RLi) terminals of the ISL22326 are
equivalent to the fixed terminals of a mechanical potentiometer.
RHi and RLi are referenced to the relative position of the wiper
and not the voltage potential on the terminals. With WRi set to
127 decimal, the wiper will be closest to RHi, and with the WRi
set to 0, the wiper is closest to RLi.
RWI (i = 0,1)
RWi is the wiper terminal and is equivalent to the movable
terminal of a mechanical potentiometer. The position of the
wiper within the array is determined by the WRi register.
SHDN
The SHDN pin forces the resistor to end-to-end open circuit
condition on RHi and shorts RWi to RLi. When SHDN is
returned to logic high, the previous latch settings put RWi at
the same resistance setting prior to shutdown. This pin is
logically ANDed with SHDN bit in ACR register. I2C interface
is still available in shutdown mode and all registers are
accessible. This pin must remain HIGH for normal operation.
Bus Interface Pins
SERIAL DATA INPUT/OUTPUT (SDA)
The SDA is a bidirectional serial data input/output pin for I2C
interface. It receives device address, operation code, wiper
address and data from an I2C external master device at the
rising edge of the serial clock SCL, and it shifts out data after
each falling edge of the serial clock.
SDA requires an external pull-up resistor, since it is an open
drain input/output.
SERIAL CLOCK (SCL)
This is the serial clock input of the I2C serial interface. SCL
requires an external pull-up resistor, since it is an open drain
input.
DEVICE ADDRESS (A2 - A0)
The address inputs are used to set the least significant 3 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
ISL22326. A maximum of 8 ISL22326 devices may occupy
the I2C serial bus.
Principles of Operation
The ISL22326 is an integrated circuit incorporating two
DCPs with their associated registers, non-volatile memory
and an I2C serial interface providing direct communication
between a host and the potentiometers and memory. The
resistor arrays are 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.
When the device is powered down, the last value stored in
IVRi will be maintained in the non-volatile memory. When
power is restored, the contents of the IVRi are recalled and
loaded into the corresponding WRi to set the wipers to the
initial value.
DCP Description
Each 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 each 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 volatile
Wiper Register (WR). Each DCP has its own WR. When the
WR of a DCP contains all zeroes (WR[6:0]= 00h), its wiper
terminal (RW) is closest to its “Low” terminal (RL). When the
WR register of a DCP contains all ones (WR[6:0] = 7Fh), 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
(127 decimal), the wiper moves monotonically from the
position closest to RL to the 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 ISL22326 is being powered up, all WRs are reset
to 40h (64 decimal), which locates RW roughly at the center
between RL and RH. After the power supply voltage
becomes large enough for reliable non-volatile memory
reading, all WRs will be reload with the value stored in
corresponding non-volatile Initial Value Registers (IVRs).
The WRs can be read or written to directly using the I2C
serial interface as described in the following sections. The
I2C interface Address Byte has to be set to 00h or 01h to
access the WR of DCP0 or DCP1 respectively.
Memory Description
The ISL22326 contains seven non-volatile and three volatile
8-bit registers. Memory map of ISL22326 is on Table 1. The
two non-volatile registers (IVRi) at address 0 and 1, contain
initial wiper value and volatile registers (WRi) contain current
wiper position. In addition, five non-volatile General Purpose
registers from address 2 to address 6 are available.
RL
RW
RH
FIGURE 15. DCP CONNECTION IN SHUTDOWN MODE
ISL22326
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MS27474T22C55S | CONN RCPT 55POS JAM NUT W/SCKT |
| ISL22416WFRT10Z-TK | IC POT DGTL 128TP LN LP 10-TDFN |
| MC100E196FN | IC DELAY LINE 128TAP 28-PLCC |
| ISL22416UFU10Z-TK | IC POT DGTL 128TP LN LP 10-MSOP |
| MS27656E23B35SA | CONN RCPT 100POS WALL MNT W/SCKT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL22326WFR16Z | 功能描述:數(shù)字電位計 IC 128 TAP FL RNG DCP 16LD 4X4 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 |
| ISL22326WFR16Z-TK | 功能描述:數(shù)字電位計 IC 128 TAP FL RNG IND DL DCP 16LD 4X4 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 |
| ISL22326WFV14Z | 功能描述:數(shù)字電位計 IC 128 TAP FL RNG DCP 14LD 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 |
| ISL22326WFV14Z-TK | 功能描述:數(shù)字電位計 IC 128 TAP FL RNG IND DCP 14LD 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 |
| ISL22326WMVEP | 制造商:Intersil Corporation 功能描述:V62/08604-01XE, 128 TAP MIL RANGE DUAL DCP 14LD TSSOP - Rail/Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。