- 您现在的位置：买卖IC网 > PDF目录9174 > DS1868E-50+T&R (Maxim Integrated Products)IC POT DIGITAL DUAL 50K 20-TSSOP PDF资料下载
参数资料
| 型号： | DS1868E-50+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/14页 |
| 文件大小： | 0K |
| 描述： | IC POT DIGITAL DUAL 50K 20-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 接片： | 256 |
| 电阻（欧姆）： | 50k |
| 电路数： | 2 |
| 温度系数： | 标准值 750 ppm/°C |
| 存储器类型： | 易失 |
| 接口： | 3 线串口 |
| 电源电压： | 2.7 V ~ 3.3 V，4.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-TSSOP |
| 包装： | 带卷 (TR) |
DS1868
2 of 14
wiper on the resistor array is set by an 8-bit value that controls which tap point is connected to the wiper
output. Communication and control of the device is accomplished via a 3-wire serial port interface. This
interface allows the device wiper position to be read or written.
Both potentiometers can be connected in series (or stacked) for an increased total resistance with the same
resolution. For multiple-device, single-processor environments, the DS1868 can be cascaded or daisy
chained. This feature provides for control of multiple devices over a single 3-wire bus.
The DS1868 is offered in three standard resistance values which include 10, 50, and 100 kohm versions.
The part is available in 16-pin SOIC (300-mil), 14-pin DIP, and 20-pin (173-mil) TSSOP packages.
OPERATION
The DS1868 contains two 256-position potentiometers whose wiper positions are set by an 8-bit value.
These two 8-bit values are written to a 17-bit I/O shift register which is used to store the two wiper
positions and the stack select bit when the device is powered. A block diagram of the DS1868 is
presented in Figure 1.
Communication and control of the DS1868 is accomplished through a 3-wire serial port interface that
drives an internal control logic unit. The 3-wire serial interface consists of the three input signals: RST ,
CLK, and DQ.
The RST control signal is used to enable the 3-wire serial port operation of the device. The RST signal is
an active high input and is required to begin any communication to the DS1868. The CLK signal input is
used to provide timing synchronization for data input and output. The DQ signal line is used to transmit
potentiometer wiper settings and the stack select bit configuration to the 17-bit I/O shift register of the
DS1868.
Figure 9(a) presents the 3-wire serial port protocol. As shown, the 3-wire port is inactive when the RST
signal input is low. Communication with the DS1868 requires the transition of the RST input from a low
state to a high state. Once the 3-wire port has been activated, data is entered into the part on the low to
high transition of the CLK signal inputs. Three-wire serial timing requirements are provided in the timing
diagrams of Figure 9(b),(c).
Data written to the DS1868 over the 3-wire serial interface is stored in the 17-bit I/O shift register (see
Figure 2). The 17-bit I/O shift register contains both 8-bit potentiometer wiper position values and the
stack select bit. The composition of the I/O shift register is presented in Figure 2. Bit 0 of the I/O shift
register contains the stack select bit. This bit will be discussed in the section entitled Stacked
Configuration. Bits 1 through 8 of the I/O shift register contain the potentiometer-1 wiper position value.
Bit 1 will contain the MSB of the wiper setting for potentiometer-1 and bit 8 the LSB for the wiper
setting. Bits 9 through 16 of the I/O shift register contain the value of the potentiometer-0 wiper position
with the MSB for the wiper position occupying bit 9 and the LSB bit 16.
相关PDF资料 |
PDF描述 |
|---|---|
| DS1868E-100+T&R | IC POT DIGITAL DUAL 100K 20TSSOP |
| DS1847B-010+T&R | IC RES TEMP-CNTRL 10/10K 16-BGA |
| DS1847B-050+T&R | IC RES TEMP-CNTRL 50/10K 16-BGA |
| MAX5408ETE+ | IC POT DGTL DUAL AUDIO 16-TQFN |
| MAX5410ETE+ | IC POT DGTL DUAL AUDIO 16-TQFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1868EN-010 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Digital Potentiometer |
| DS1868EN-050 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Digital Potentiometer |
| DS1868EN-100 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Digital Potentiometer |
| DS1868N-010 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Digital Potentiometer |
| DS1868N-050 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Digital Potentiometer |
发布紧急采购，3分钟左右您将得到回复。