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| 型号： | MCP3421EV |
| 厂商： | Microchip Technology |
| 文件页数： | 8/42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 16
2009 Microchip Technology Inc.
5.2
Configuration Register
The device has an 8-bit wide configuration register to
select for: input channel, conversion mode, conversion
rate, and PGA gain. This register allows the user to
change the operating condition of the device and check
the status of the device operation.
The user can rewrite the configuration byte any time
during the device operation. Register 5-1 shows the
configuration register bits.
REGISTER 5-1:
CONFIGURATION REGISTER
R/W-1
R/W-0
R/W-1
R/W-0
RDY
C1
C0
O/C
S1
S0
G1
G0
1 *
0 *
1 *
0 *
bit 7
bit 0
* Default Configuration after Power-On Reset
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
RDY: Ready Bit
This bit is the data ready flag. In read mode, this bit indicates if the output register has been updated
with a latest conversion result. In One-Shot Conversion mode, writing this bit to “1” initiates a new
conversion.
Reading RDY bit with the read command:
1
= Output register has not been updated.
0
= Output register has been updated with the latest conversion result.
Writing RDY bit with the write command:
Continuous Conversion mode: No effect
One-Shot Conversion mode:
1
= Initiate a new conversion.
0
= No effect.
bit 6-5
C1-C0: These bits are not effected for the MCP3421.
bit 4
O/C: Conversion Mode Bit
1
= Continuous Conversion Mode
(Default). The device performs data conversions continuously.
0
= One-Shot Conversion Mode. The device performs a single conversion and enters a low power
standby mode until it receives another write or read command.
bit 3-2
S1-S0: Sample Rate Selection Bit
00 =
240 SPS (12 bits)
(Default)
01 =
60 SPS (14 bits)
10 =
15 SPS (16 bits)
11
=
3.75 SPS (18 bits)
bit 1-0
G1-G0: PGA Gain Selection Bits
00 =
x1
(Default)
01 =
x2
10 =
x4
11
=
x8
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