- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄2013 > MCP4728T-E/UN (Microchip Technology)IC DAC 12BIT W/I2C 10-MSOP PDF資料下載
參數(shù)資料
| 型號： | MCP4728T-E/UN |
| 廠商： | Microchip Technology |
| 文件頁數(shù)： | 22/33頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAC 12BIT W/I2C 10-MSOP |
| 視頻文件： | MCP4728 Evaluation Board Demo |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 設(shè)置時間： | 6µs |
| 位數(shù)： | 12 |
| 數(shù)據(jù)接口： | EEPROM，I²C，串行 |
| 轉(zhuǎn)換器數(shù)目： | 4 |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 10-TFSOP，10-MSOP（0.118"，3.00mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 10-MSOP |
| 包裝： | 帶卷 (TR) |
| 輸出數(shù)目和類型： | 4 電壓，單極 |
| 采樣率（每秒）： | * |
| 配用： | MCP4728EV-ND - BOARD EVAL 12BIT 4CH DAC MCP4728 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁當(dāng)前第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁
2010 Microchip Technology Inc.
DS22187E-page 29
MCP4728
5.0
I2C SERIAL INTERFACE
COMMUNICATIONS
The MCP4728 device uses a two-wire I2C serial
interface. When the device is connected to the I2C bus
line, the device works as a slave device. The device
supports standard, fast and high speed modes.
The following sections describe how to communicate
with the MCP4728 device using the I2C serial interface
commands.
5.1
Overview of I2C Serial Interface
Communications
An example of the hardware connection diagram is
shown in Figure 7-1. A device that sends data onto the
bus is defined as the transmitter, and a device receiving
data, as the receiver. The bus has to be controlled by a
master (MCU) device which generates the serial clock
(SCL), controls the bus access and generates the
START and STOP conditions. Both master (MCU) and
slave (MCP4728) can operate as transmitter or
receiver, but the master device determines which mode
is activated.
Communication is initiated by the master (MCU) which
sends the START bit, followed by the slave (MCP4728)
address byte. The first byte transmitted is always the
slave (MCP4728) address byte, which contains the
device code (1100), the address bits (A2, A1, A0), and
the R/W bit. The device code for the MCP4728 device
is 1100, and the address bits are user-writable.
When the MCP4728 device receives a Read command
(R/W = 1), it transmits the contents of the DAC input
registers and EEPROM sequentially. When writing to
the device (R/W = 0), the device will expect Write
command type bits in the following byte. The reading
and various writing commands are explained in the
following sections.
The MCP4728 device supports all three I2C serial
communication operating modes:
Standard Mode: bit rates up to 100 kbit/s
Fast Mode: bit rates up to 400 kbit/s
High Speed Mode (HS mode): bit rates up to
3.4 Mbit/s
Refer to the Philips I2C document for more details of
the I2C specifications.
5.1.1
HIGH-SPEED (HS) MODE
The I2C specification requires that a high-speed mode
device must be ‘a(chǎn)ctivated’ to operate in High-Speed
(3.4 Mbit/s) mode. This is done by sending a special
address byte of 00001XXX following the START bit.
The XXX bits are unique to the high-speed mode
Master. This byte is referred to as the high-speed
Master Mode Code (HSMMC). The MCP4728 device
does not acknowledge this byte. However, upon
receiving this command, the device switches to HS
mode and can communicate at up to 3.4 Mbit/s on SDA
and SCL lines. The device will switch out of the HS
mode on the next STOP condition.
For more information on the HS mode, or other I2C
modes, please refer to the Philips I2C specification.
5.2
I2C BUS CHARACTERISTICS
The specification of the I2C serial communication
defines the following bus protocol:
Data transfer may be initiated only when the bus
is not busy
During data transfer, the data line must remain
stable whenever the clock line is HIGH. Changes
in the data line while the clock line is HIGH will be
interpreted as a START or STOP condition
Accordingly, the following bus conditions have been
defined using Figure 5-1.
5.2.1
BUS NOT BUSY (A)
Both data and clock lines remain HIGH.
5.2.2
START DATA TRANSFER (B)
A HIGH to LOW transition of the SDA line, while the
clock (SCL) is HIGH, determines a START condition.
All commands must be preceded by a START
condition.
5.2.3
STOP DATA TRANSFER (C)
A LOW to HIGH transition of the SDA line, while the
clock (SCL) is HIGH, determines a STOP condition. All
operations must be ended with a STOP condition.
5.2.4
DATA VALID (D)
The state of the data line represents valid data when,
after a START condition, the data line is stable for the
duration of the HIGH period of the clock signal.
The data on the line must be changed during the LOW
period of the clock signal. There is one clock pulse per
bit of data.
Each data transfer is initiated with a START condition
and terminated with a STOP condition.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MCP4822T-E/MS | IC DAC 12BIT DUAL W/SPI 8MSOP |
| MCP4912T-E/SL | DAC 10BIT DUAL SPI 14SOIC |
| MCP4921-E/MC | DAC 12BIT SGL W/SPI 8DFN |
| MCP79402T-I/MNY | IC RTCC 64BIT SRAM I2C 8TDFN |
| MCP7940MT-I/ST | IC RTCC I2C 64B SRAM 8-TSSOP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MCP4729-E/SS | 功能描述:數(shù)模轉(zhuǎn)換器- DAC Octal 12-bit NV DAC with I2C interface RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MCP47A1T-A0E/LT | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 6-Bit Volatile DAC with Command Code RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MCP47A1T-A1E/LT | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 6-Bit Volatile DAC with Command Code RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MCP47DA1T-A0E/OT | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 6-bit windowed DAC voltage margining RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MCP47DA1T-A1E/OT | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 6-bit windowed DAC voltage margining RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。