参数资料
型号: MCP4725DM-PTPLS
厂商: Microchip Technology
文件页数: 18/50页
文件大小: 0K
描述: BOARD DAUGHTER PICTAIL MCP4725
标准包装: 1
DAC 的数量: 1
位数: 12
采样率(每秒): 100k ~ 3.4M
数据接口: I²C
设置时间: 6µs
DAC 型: 电压
工作温度: -40°C ~ 125°C
已供物品: 板,CD
已用 IC / 零件: MCP4725
产品目录页面: 673 (CN2011-ZH PDF)
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2009 Microchip Technology Inc.
DS22039D-page 25
MCP4725
FIGURE 6-2:
Write Commands for DAC Input Register and EEPROM.
(A) Write DAC Register: (C2, C1, C0) = (0,1,0) or
(B) Write DAC Register and EEPROM: (C2, C1, C0) = (0,1,1)
1st byte (Device Addressing)
ACK (MCP4725)
2nd byte
3rd byte
ACK (MCP4725)
4th byte
D3 D2
D0
D1
1
0
0 A2 A1 A0 0
C2 C1 C0 X
X PD1 PD0
X
X X X X
D11 D10 D9 D8 D7 D6 D5 D4
START Bit
DAC Register Data (12 bits)
STOP Bit
Power Down Selection
Unused
Device Code Address Bits R/W
Write Command Type:
Write DAC Register: (C2 = 0, C1 = 1, C0 = 0)
Write DAC Register and EEPROM: (C2 = 0, C1 = 1, C0 = 1). See Note 1
The device updates the VOUT after this ACK pulse is issued.
For EEPROM Write:
- The Charge Pump initiates the EEPROM writing sequence at the falling edge of this ACK pulse.
- The RDY/BSY bit (pin) goes “low” at the falling edge of this ACK pulse and back to “high” immediately after
the EEPROM write is completed.
ACK (MCP4725)
2nd byte
3rd byte
ACK (MCP4725)
4th byte
D3 D2
D0
D1
C2 C1 C0 X
X PD1 PD0 X
X X X X
D11 D10 D9 D8 D7 D6 D5 D4
STOP
Bit
Repeat Bytes of 2nd - 4th bytes
Note 1: RDY/BSY bit stays “low” during the EEPROM write. Any new write command including repeat bytes during the
EEPROM write mode is ignored.
The RDY/BSY bit sets to “high” after the EEPROM write is completed.
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