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参数资料
| 型号： | MCP3421EV |
| 厂商： | Microchip Technology |
| 文件页数： | 10/42页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR MCP3421 SOT23-6 |
| 产品培训模块： | MCP3901 Analog Front End |
| 设计资源： | MCP3421EV Gerber Files |
| 标准包装： | 1 |
| ADC 的数量： | 1 |
| 位数： | 18 |
| 采样率（每秒）： | 4 |
| 数据接口： | 串行 |
| 输入范围： | ±2.5 V |
| 工作温度： | -40°C ~ 125°C |
| 已用 IC / 零件： | MCP3421 |
| 已供物品： | 2 板，CD |
| 产品目录页面： | 672 (CN2011-ZH PDF) |
| 相关产品： | MCP3421A5T-E/OTDKR-ND - IC ADC 18BIT 3.75SPS SOT23-6 MCP3421A3T-E/CHTR-ND - IC ADC 18BIT 3.75SPS 1CH SOT23-6 MCP3421A2T-E/CHTR-ND - IC ADC 18BIT 3.75SPS 1CH SOT23-6 MCP3421A1T-E/CHTR-ND - IC ADC 18BIT 3.75SPS 1CH SOT23-6 MCP3421A0T-E/CHTR-ND - IC ADC 18BIT 3.75SPS 1CH SOT23-6 MCP3421A0T-E/OTDKR-ND - IC ADC 18BIT 3.75SPS 1CH SOT23-6 MCP3421A0T-E/OTCT-ND - IC ADC 18BIT 3.75SPS 1CH SOT23-6 MCP3421A0T-E/OTTR-ND - IC ADC 18BIT 3.75SPS 1CH SOT23-6 MCP3421A5T-E/OTCT-ND - IC ADC 18BIT 3.75SPS SOT23-6 MCP3421A5T-E/OTTR-ND - IC ADC 18BIT 3.75SPS SOT23-6 |
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MCP3421
DS22003E-page 18
2009 Microchip Technology Inc.
FIGURE 5-1:
MCP3421 Address Byte.
5.3.2
WRITING A CONFIGURATION BYTE
TO THE DEVICE
When the Master sends an address byte with the R/W
bit low (R/W = 0), the MCP3421 expects one
configuration byte following the address. Any byte sent
after this second byte will be ignored. The user can
change the operating mode of the device by writing the
configuration register bits.
If the device receives a write command with a new
configuration setting, the device immediately begins a
new conversion and updates the conversion data.
FIGURE 5-2:
Timing Diagram For Writing To The MCP3421.
Start bit
Read/Write bit
Address Byte
R/W ACK
1
0
1
X
Device Code
Address Bits (Note 1)
Address
Acknowledge bit
Address
Note 1:
Specified by the customer and programmed at
the factory. If not specified by the customer,
programmed to ‘000’.
9
1
9
1
Stop Bit by
11
0
1A2 A1 A0
R/W
ACK by
MCP3421
RDY
C1 C0
O/C
S1 S0 G1 G0
1st Byte:
2nd Byte:
Master
ACK by
MCP3421
MCP3421 Address Byte
Configuration Byte
Start Bit by
Master
with Write command
Note:
– Stop bit can be issued any time during writing.
–
MCP3421 device code is 1101.
– Address Bits A2- A0 = 000 are programmed at factory unless customer requests different codes.
SCL
SDA
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