- 您现在的位置：买卖IC网 > PDF目录9327 > MCP4662T-503E/UN (Microchip Technology)IC POT DGTL 50K DUAL 10-MSOP PDF资料下载
参数资料
| 型号： | MCP4662T-503E/UN |
| 厂商： | Microchip Technology |
| 文件页数： | 65/92页 |
| 文件大小： | 0K |
| 描述： | IC POT DGTL 50K DUAL 10-MSOP |
| 标准包装： | 2,500 |
| 接片： | 257 |
| 电阻（欧姆）： | 50k |
| 电路数： | 2 |
| 温度系数： | 标准值 150 ppm/°C |
| 存储器类型： | 非易失 |
| 接口： | I²C（设备位址） |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页当前第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页
MCP454X/456X/464X/466X
DS22107A-page 68
2008 Microchip Technology Inc.
8.2
Using Shutdown
Figure 8-3 shows a possible application circuit where
the independent terminals could be used. Disconnect-
ing the wiper allows the transistor input to be taken to
the Bias voltage level (disconnecting A and or B may
be desired to reduce system current). Disconnecting
Terminal A modifies the transistor input by the RBW
rheostat value to the Common B. Disconnecting
Terminal B modifies the transistor input by the RAW
rheostat value to the Common A. The Common A and
Common B connections could be connected to VDD
and VSS.
FIGURE 8-3:
Example Application Circuit
using Terminal Disconnects.
8.3
Software Reset Sequence
At times it may become necessary to perform a Soft-
ware Reset Sequence to ensure the MCP45XX/46XX
device is in a correct and known I2C Interface state.
This technique only resets the I2C state machine.
This is useful if the MCP45XX/46XX device powers up
in an incorrect state (due to excessive bus noise, ...), or
if the Master Device is reset during communication.
Figure 8-4 shows the communication sequence to soft-
ware reset the device.
FIGURE 8-4:
Software Reset Sequence
Format.
The 1st Start bit will cause the device to reset from a
state in which it is expecting to receive data from the
Master Device. In this mode, the device is monitoring
the data bus in Receive mode and can detect the Start
bit forces an internal Reset.
The nine bits of ‘1’ are used to force a Reset of those
devices that could not be reset by the previous Start bit.
This occurs only if the MCP45XX/46XX is driving an A
bit on the I2C bus, or is in output mode (from a Read
command) and is driving a data bit of ‘0’ onto the I2C
bus. In both of these cases, the previous Start bit could
not be generated due to the MCP45XX/46XX holding
the bus low. By sending out nine ‘1’ bits, it is ensured
that the device will see a A bit (the Master Device does
not drive the I2C bus low to acknowledge the data sent
by the MCP45XX/46XX), which also forces the
MCP45XX/46XX to reset.
The 2nd Start bit is sent to address the rare possibility
of an erroneous write. This could occur if the Master
Device was reset while sending a Write command to
the MCP45XX/46XX, AND then as the Master Device
returns to normal operation and issues a Start condition
while the MCP45XX/46XX is issuing an Acknowledge.
In this case, if the 2nd Start bit is not sent (and the Stop
bit was sent) the MCP45XX/46XX could initiate a write
cycle.
The Stop bit terminates the current I2C bus activity. The
MCP45XX/46XX wait to detect the next Start condition.
This sequence does not effect any other I2C devices
which may be on the bus, as they should disregard this
as an invalid command.
Note:
This technique is documented in AN1028.
Balance
Bias
W
B
Input
To base
of Transistor
(or Amplifier)
A
Common B
Common A
Note:
The potential for this erroneous write
ONLY occurs if the Master Device is reset
while sending a Write command to the
MCP45XX/46XX.
S
‘1’
S
P
Start
bit
Nine bits of ‘1’
Start bit
Stop bit
相关PDF资料 |
PDF描述 |
|---|---|
| DS1306EN | IC RTC SERIAL ALARM IND 20-TSSOP |
| DS1306E | IC RTC SERIAL ALARM 20-TSSOP |
| DS1284 | IC TIMEKEEPER WATCHDOG 28-DIP |
| DS17887-5 | IC RTC 5V 8K NV RAM 24-EDIP |
| MCP4662T-104E/UN | IC POT DGTL 100K DUAL 10-MSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP46XXDM-PTPLS | 功能描述:数字电位计 IC MCP46XX PICtail Plus Daughter Board 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 |
| MCP46XXEV | 功能描述:数字电位计开发工具 MCP46XX Eval Board RoHS:否 制造商:Arduino 产品:TinkerKit Rotary Potentiometers 工具用于评估:TinkerKit 电阻:4.7 kOhms 工作电源电压:0 V to 5 V |
| MCP4706A0T-015E/CH | 制造商:Microchip Technology Inc 功能描述:IC, DAC, 16 bit, 3.4 MSPS, SOT-23-6; Resolution (Bits):8bit; Input Channel Type:Single Ended; Supply Voltage Range:2.7V to 5.5V; Digital IC Case Style:SOT-23; No. of Pins:6; Data Interface:I2C, Serial; Supply Current:210A |
| MCP4706A0T-E/CH | 功能描述:数模转换器- DAC Sngl 8B NV DAC w/Ext Vref & I2C interface RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
| MCP4706A0T-E/MAY | 功能描述:数模转换器- DAC Sngl 8B NV DAC w/Ext Vref & I2C interface RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
发布紧急采购，3分钟左右您将得到回复。