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參數(shù)資料
| 型號(hào)： | DS1803 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | 數(shù)字電位計(jì) |
| 英文描述： | Addressable Dual Digital Potentiometer(可尋址雙路數(shù)字電位器) |
| 中文描述： | DIGITAL POTENTIOMETER, 2-WIRE SERIAL CONTROL INTERFACE, 256 POSITIONS, PDIP16 |
| 封裝： | PLASTIC, DIP-16 |
| 文件頁數(shù)： | 4/10頁 |
| 文件大?。?/td> | 74K |
| 代理商： | DS1803 |
DS1803
022698 4/10
COMMAND AND PROTOCOL
The command and protocol structure of the DS1803
allows the user to read or write the potentiometer(s).
The command structures for the part are presented in
Figures 4 and 5. Potentiometer data values and control
and command values are always transmitted most sig-
nificant bit (MSB) first. During communications the
receiving unit always generates the acknowledge.
Reading the DS1803
As shown in Figure 4, the DS1803 provides one read
command operation. This operation allows the user to
read both potentiometers. Specifically, the R/W bit of
the control byte is set equal to a 1 for a read operation.
Communication to read the DS1803 begins with a
START condition which is issued by the master device.
The control byte from the master device will follow the
START condition. Once the control byte has been
received by the DS1803, the part will respond with an
ACKNOWLEDGE. The read/write bit of the control byte
as stated should be set equal to ‘1’ for reading the
DS1803.
When the master has received the ACKNOWLEDGE
from the DS1803, the master can then begin to receive
potentiometer wiper data. The value of the potentiome-
ter–0 wiper position will be the first returned from the
DS1803. Once the eight bits of the potentiometer–0
wiper position has been transmitted, the master will
need to issue an ACKNOWLEDGE, unless it is the only
byte to be read, in which case the master issues a NOT
ACKNOWLEDGE. If desired the master may stop the
communication transfer at this point by issuing the
STOP condition. However, if the value of the potentiom-
eter–1 wiper position value is needed communication
transfer can continue by clocking the remaining eight
bits of the potentiometer–1 value, followed by an NOT
ACKNOWLEDGE. Final communication transfer is ter-
minated by issuing the STOP command. Again the flow
of the read operation is presented in Figure 4.
Writing the DS1803
A data flow diagram for writing the DS1803 is shown in
Figure 5. The DS1803 has three write command opera-
tions. These include write pot–0, write pot–1, and write
pot–0/1. The write pot–0 command allows the user to
write the value of potentiometer–0 and as an option the
the value of potentiometer–1. The write–1 command
allows the user to write the value of potentiometer–1
only. The last write command, write–0/1, allows the
user to write both potentiometers to the same value with
one command and one data value being issued.
All the write operations begin with a START condition.
Following the START condition, the master device will
issue the control byte. The read/write bit of the control
byte will be set to ‘0’ for writing the DS1803. Once the
control byte has been issued and the master receives
the acknowledgment from the DS1803, the command
byte is transmitted to the DS1803. As mentioned above,
there exist three write operations that can be used with
the DS1803. The binary value of each write command is
shown in Figure 5 and also in the Table 1.
2–WIRE COMMAND WORDS
Table 1
COMMAND
COMMAND VALUE
Write Potentiometer–0
101010 01
Write Potentiometer–1
101010 10
Write Both Pots
101011 11
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| DS18030-010 | 功能描述:數(shù)字電位計(jì) 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(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 |
| DS18030-010+ | 功能描述:數(shù)字電位計(jì) IC Addressable Dual 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 |
| DS18030-050 | 功能描述:數(shù)字電位計(jì) 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(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 |
| DS18030-050+ | 功能描述:數(shù)字電位計(jì) IC Addressable Dual 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 |
| DS1803-010 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Addressable Dual Digital Potentiometer |
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