15 FN7905.0 August 19, 2011 When the device enters shutdown, all current DCP WR settings are maintained. When the device exits shutdow" /> 
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    參數(shù)資料
    

    


    


    
型號(hào)：
ISL23448TFVZ

    

    
廠商：
Intersil

    

    
文件頁(yè)數(shù)：
7/21頁(yè)

    

    
文件大小：
0K

    

    
描述：
IC DGTL POT 4CH 100K 20TSSOP

    

    
產(chǎn)品培訓(xùn)模塊：
Solutions for Industrial Control Applications
    		

    

    
標(biāo)準(zhǔn)包裝：
740

    

    
系列：
XDCP™

    

    
接片：
128
    		

    

    
電阻（歐姆）：
100k
    		

    

    
電路數(shù)：
4
    		

    

    
溫度系數(shù)：
標(biāo)準(zhǔn)值 45 ppm/°C
    		

    

    
存儲(chǔ)器類(lèi)型：
易失
    		

    

    
接口：
4 線 SPI（芯片選擇）
    		

    

    
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(lèi)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：
20-TSSOP
    		

    

    
包裝：
管件
    		

    

    

    

	
    
    
    

    
    
	
    ISL23448
    15
    FN7905.0
    August 19, 2011
    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 0.2 to 0.4s the
    wipers will be RESET to their mid position. This is done to avoid
    an undefined state at the wiper outputs.
    SPI Serial Interface
    The ISL23448 supports an SPI serial protocol, mode 0. The
    device is accessed via the SDI input and SDO output with data
    clocked in on the rising edge of SCK, and clocked out on the
    falling edge of SCK. CS must be LOW during communication with
    the ISL23448. The SCK and CS lines are controlled by the host or
    master. The ISL23448 operates only as a slave device.
    All communication over the SPI interface is conducted by
    sending the MSB of each byte of data first.
    Protocol Conventions
    The SPI protocol contains Instruction Byte followed by one or more
    Data Bytes. A valid Instruction Byte contains instruction as the three
    MSBs, with the following five register address bits (see Table 3).
    The next byte sent to the ISL23448 is the Data Byte.
    Table 4 contains a valid instruction set for ISL23448.
    If the [R4:R0] bits are zero, one, two or three then the read or write
    is to the WRi register. If the [R4:R0] are 10000, then the operation
    is to the ACR.
    Write Operation
    A write operation to the ISL23448 is a two or more bytes
    operation. First, it requires that the CS transition from
    HIGH-to-LOW. Then, the host sends a valid Instruction Byte,
    followed by one or more Data Bytes to the SDI pin. The host
    terminates the write operation by pulling the CS pin from
    LOW-to-HIGH. Instruction is executed on the rising edge of CS
    (see Figure 27).
    Read Operation
    A Read operation to the ISL23448 is a four byte operation. First,
    it requires that the CS transition from HIGH-to-LOW. Then, the
    host sends a valid Instruction Byte, followed by a “dummy” Data
    Byte, NOP Instruction Byte and another “dummy” Data Byte to
    the SDI pin. The SPI host receives the Instruction Byte (instruction
    code + register address) and requested Data Byte from the SDO
    pin on the rising edge of SCK during the third and fourth bytes,
    respectively. The host terminates the read by pulling the CS pin
    from LOW-to-HIGH (see Figure 28).
    FIGURE 26. SHUTDOWN MODE WIPER RESPONSE
    POWER-UP
    USER PROGRAMMED
    MID SCALE = 40H
    SHDN ACTIVATED SHDN RELEASED
    AFTER SHDN
    WIPE
    R
    V
    O
    LT
    AGE
    ,
    V
    RW
    (V
    )
    SHDN MODE
    TIME (s)
    WIPER RESTORE TO
    THE ORIGINAL POSITION
    0
    TABLE 3. INSTRUCTION BYTE FORMAT
    BIT #
    7
    654321
    0
    I2
    I1
    I0
    R4
    R3
    R2
    R1
    R0
    TABLE 4. INSTRUCTION SET
    INSTRUCTION SET
    OPERATION
    I2
    I1
    I0
    R4
    R3
    R2
    R1
    R0
    0
    XXX
    XX
    NOP
    0
    1
    XXX
    XX
    ACR READ
    0
    1
    XXX
    XX
    ACR WRTE
    1
    0
    R4R3R2R1R0
    WRi or ACR READ
    1
    0
    R4R3R2R1R0
    WRi or ACR WRTE
    Where X means “do not care”.
    
    
    
    
    
    


    


    

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    相關(guān)代理商/技術(shù)參數(shù)
    		

    參數(shù)描述
    		

    
    

    
ISL23448TFVZ-T7A
功能描述:數(shù)字電位計(jì) IC 128 TAPVOLATILE SPI QUAD RNG IND 20LD 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(chǔ)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

    

    
ISL23448TFVZ-TK
功能描述:數(shù)字電位計(jì) IC 128 TAP VOLATILE SPI QD FL RNG DCP 20LD 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(chǔ)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

    

    
ISL23448UFRZ
功能描述:數(shù)字電位計(jì) IC 128 TAP VOLATILE SPI QD FL RNG DCP 20LD 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(chǔ)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

    

    
ISL23448UFRZ-T7A
功能描述:數(shù)字電位計(jì) IC 128 TAPVOLATILE SPI QUAD RNG IND 20LD 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(chǔ)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

    

    
ISL23448UFRZ-TK
功能描述:數(shù)字電位計(jì) IC 128 TAP VOLATILE SPI QD FL RNG DCP 20LD 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(chǔ)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

    

    
    
    
    
	
    	
    
    
     
     
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