- 您现在的位置：买卖IC网 > PDF目录9044 > MCP4725A1T-E/CH (Microchip Technology)IC DAC 12BIT EE W/I2C SOT23-6 PDF资料下载
参数资料
| 型号： | MCP4725A1T-E/CH |
| 厂商： | Microchip Technology |
| 文件页数： | 20/50页 |
| 文件大小： | 0K |
| 描述： | IC DAC 12BIT EE W/I2C SOT23-6 |
| 标准包装： | 1 |
| 设置时间： | 6µs |
| 位数： | 12 |
| 数据接口： | EEPROM，I²C，串行 |
| 转换器数目： | 1 |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 |
| 供应商设备封装： | SOT-23-6 |
| 包装： | 标准包装 |
| 输出数目和类型： | 1 电压，单极；1 电压，双极 |
| 采样率（每秒）： | * |
| 产品目录页面： | 673 (CN2011-ZH PDF) |
| 配用： | MCP4725DM-PTPLS-ND - BOARD DAUGHTER PICTAIL MCP4725 |
| 其它名称： | MCP4725A1T-E/CHDKR |
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页当前第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
2009 Microchip Technology Inc.
DS22039D-page 27
MCP4725
7.0
I2C SERIAL INTERFACE
COMMUNICATION
7.1
OVERVIEW
The MCP4725 device uses a two-wire I2C serial
interface that can operate on a standard, fast or high
speed mode. A device that sends data onto the bus is
defined as transmitter, and a device receiving data as
receiver. The bus has to be controlled by a master
device which generates the serial clock (SCL), controls
the bus access and generates the START and STOP
conditions. The MCP4725 device works as slave. Both
master and slave can operate as transmitter or
receiver, but the master device determines which mode
is activated. An example of hardware connection
diagram is shown in Figure 8-1. Communication is
initiated by the master (microcontroller) which sends
the START bit, followed by the slave address byte. The
first byte transmitted is always the slave address byte,
which contains the device code, the address bits, and
the R/W bit. The device code for the MCP4725 device
is 1100.
When the device receives a read command (R/W = 1),
it transmits the contents of the DAC input register and
EEPROM. A non-acknowledge (NAK) or repeated
START bit can be transmitted at any time. See
Figure 6-3 for the read operation example. If writing to
the device (R/W = 0), the device will expect write com-
mand type bits in the following byte. See Figure 6-1
and Figure 6-2 for the write operation examples.
The MCP4725 supports all three I2C 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 Phillips I2C document for more details of
the I2C specifications.
7.2
Device Addressing
The address byte is the first byte received following the
START condition from the master device. The first part
of the address byte consists of a 4-bit device code
which is set to 1100 for the MCP4725. The device code
is followed by three address bits (A2, A1, A0) which are
programmed as follows:
The choice of A2 and A1 bits are provided by the
customer as part of the ordering process. These
bits are then programmed (hard-wired) during
manufacturing
The A2 and A1 are programmed to ‘00’ (default),
if not requested by customer
A0 bit is determined by the logic state of A0 pin.
The A0 pin can be tied to VDD or VSS, or can be
actively driven by digital logic levels. The
advantage of using the A0 pin is that the users
can control the A0 bit on their application PCB
circuit and also two identical MCP4725 devices
can be used on the same bus line.
When the device receives an address byte, it compares
the logic state of the A0 pin with the A0 address bit
received before responding with the acknowledge bit.
The logic state of the A0 pin needs to be set prior to the
interface communication.
FIGURE 7-1:
Device Addressing.
START bit
Read/Write bit
Address Byte
R/W ACK
Acknowledge bit
Slave Address
1
0
Slave Address for MCP4725
A2 A1 A0
Note: A2 and A1: Programmed (hard-wired) at the factory.
Please Contact Microchip Technology Inc. for A2 and
A1 programming options.
A0: Use the logic level state of A0 pin.
Device Code
Address Bits
相关PDF资料 |
PDF描述 |
|---|---|
| M83723/95A1404N | CONN PLUG 4POS STRAIGHT W/SCKT |
| VI-BTH-MY-F1 | CONVERTER MOD DC/DC 52V 50W |
| VI-BTF-MY-F4 | CONVERTER MOD DC/DC 72V 50W |
| MS27496E13B4P | CONN RCPT 4POS BOX MNT W/PINS |
| MCP4725A0T-E/CH | IC DAC 12BIT W/I2C SOT23A-6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP4725A2T-E/CH | 功能描述:数模转换器- DAC Sngl 12-B NV DAC w/ 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 |
| MCP4725A2T-E/CH-CUT TAPE | 制造商:Microchip 功能描述:MCP4725 Series 1 Ch I2C EEPROM Memory 5.5 V 12-Bit D/A Converter SMT - SOT-23-6 |
| MCP4725A3T-E/CH | 功能描述:数模转换器- DAC Sngl 12-B NV DAC w/ 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 |
| MCP4725A3T-E/CH-CUT TAPE | 制造商:Microchip 功能描述:MCP4725 Series 1 Ch I2C EEPROM Memory 5.5 V 12-Bit D/A Converter SMT - SOT-23-6 |
| MCP4725DM-PTPLS | 功能描述:子卡和OEM板 MCP4725 DAC PICTail Plus Daughter Board RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit |
发布紧急采购，3分钟左右您将得到回复。