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参数资料
| 型号： | ISL22326 |
| 厂商： | Intersil Corporation |
| 英文描述： | Low Noise, Low Power, I2C Bus, 128 Taps(低噪声,低功率，I2C总线, 128抽头电位器) |
| 中文描述： | 低噪声，低功耗，I2C总线，128丝锥（低噪声，低功率和I2C总线，128抽头电位器） |
| 文件页数： | 9/13页 |
| 文件大小： | 488K |
| 代理商： | ISL22326 |
9
FN6176.0
July 17, 2006
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 OR’d with SHDN bit in ACR register. I
2
C 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 I
2
C
interface. It receives device address, operation code, wiper
address and data from an I
2
C 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 I
2
C 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 I
2
C 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 I
2
C serial bus.
Principles of Operation
The ISL22326 is an integrated circuit incorporating two
DCPs with their associated registers, non-volatile memory
and an I
2
C 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.
FIGURE 13. MIDSCALE GLITCH, CODE 3Fh TO 40h
FIGURE 14. LARGE SIGNAL SETTLING TIME
Typical Performance Curves
(Continued)
Wiper Mid Point Movement
from 3Fh to 40h
RL
RW
RH
FIGURE 15. DCP CONNECTION IN SHUTDOWN MODE
ISL22326
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL22326UFR16Z | 功能描述:数字电位计 IC 128 TAP FL RNG IND DL DCP 16LD 4X4 RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| ISL22326UFR16Z-TK | 功能描述:数字电位计 IC 128 TAP FL RNG IND DL DCP 16LD 4X4 RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| ISL22326UFV14Z | 功能描述:数字电位计 IC 128 TAP FL RNG DCP 14LD RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| ISL22326UFV14Z-TK | 功能描述:数字电位计 IC 128 TAP FL RNG IND DCP 14LD RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| ISL22326WFR16Z | 功能描述:数字电位计 IC 128 TAP FL RNG DCP 16LD 4X4 RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
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