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參數(shù)資料
| 型號： | DS1808 |
| 元件分類： | 數(shù)字電位計 |
| 英文描述： | Dual Log Digital Potentiometer |
| 文件頁數(shù)： | 6/17頁 |
| 文件大?。?/td> | 431K |
| 代理商： | DS1808 |
DS1808
6 of 17
The master device generates all serial clock pulses and the start and stop conditions. A transfer is ended
with a stop condition or with a repeated start condition. Since a repeated start condition is also the
beginning of the next serial transfer, the bus will not be released.
The DS1808 may operate in the following two modes:
1.
Slave receiver mode: Serial data and clock are received through SDA and SCL respectively. After
each byte is received, an acknowledge bit is transmitted. Start and stop conditions are recognized as
the beginning and end of a serial transfer. Address recognition is performed by hardware after
reception of the slave (device) address and direction bit.
2.
Slave transmitter mode: The first
byte is received and handled as in the slave receiver mode.
However, in this mode the direction bit will indicate that the transfer direction is reversed. Serial data
is transmitted on SDA by the DS1808 while the serial clock is input on SCL. Start and stop conditions
are recognized as the beginning and end of a serial transfer.
3.
Slave Address: command/control byte is the first byte received following the start condition from the
master device. The command/control byte consists of a 4-bit control code. For the DS1808, this is set
as 0101 binary for read/write operations. The next three bits of the command/control byte are the
device select bits or slave address (A2, A1, A0). They are used by the master device to select which
of eight devices is to be accessed. When reading or writing the DS1808, the device select bits must
match the device select pins (A2, A1, A0). The last bit of the command/control byte (R/W) defines
the operation to be performed. When set to a 1, a read operation is selected, and when set to a 0, a
write operation is selected.
Following the START condition, the DS1808 monitors the SDA bus checking the device type identifier
being transmitted. Upon receiving the
0101
control code, the appropriate device address bits, and the
read/write bit, the slave device outputs an acknowledge signal on the SDA line.
COMMAND AND PROTOCOL
The command and protocol structure of the DS1808 allows the user to read from or write to the
potentiometer(s). Additionally, the 2-wire command/protocol structure of the DS1808 will support eight
different devices and a maximum of 16 channels that can be uniquely controlled. The command
structures for the device are presented in Figures 3, 4, 5, and 6. Potentiometer data values and
command/control values are always transmitted most significant bit (MSB) first. During communications,
the receiving unit always generates the acknowledgement.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1808 | Process: 1P, 1M, 5.0um, 30V NF & PF, UVNd, UVPd ,N+ESD,TEOS Spacer, Passivation w/Nov TEOS Oxide-Nitride |
| DS1809-010 | Dallastat, 64-position linear taper |
| DS1809U-010 | Dallastat, 64-position linear taper |
| DS1809U-050 | Dallastat, 64-position linear taper |
| DS1809U-100 | Dallastat, 64-position linear taper |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1808Z-050 | 功能描述:數(shù)字電位計 IC 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 |
| DS1808Z-050/T&R | 制造商:Maxim Integrated Products 功能描述:DUAL LOG HI VOLTAGE POT T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC POT DUAL LOG HV 50K 16-SOIC |
| DS1808Z-050/T&R | 功能描述:數(shù)字電位計 IC 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 |
| DS1808Z-050+ | 功能描述:數(shù)字電位計 IC Dual Log 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 |
| DS1808Z-050+T&R | 制造商:Maxim Integrated Products 功能描述:DGTL POTENTIOMETER 32POS 45KOHM DUAL 16SOIC N - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC POT DUAL LOG HV 50K 16-SOIC |
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