- 您现在的位置：买卖IC网 > PDF目录10733 > MCP3426A0-E/MC (Microchip Technology)IC ADC 16BIT I2C PROGBL 8-DFN PDF资料下载
参数资料
| 型号： | MCP3426A0-E/MC |
| 厂商： | Microchip Technology |
| 文件页数： | 7/56页 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT I2C PROGBL 8-DFN |
| 产品培训模块： | MCP3901 Analog Front End |
| 标准包装： | 150 |
| 位数： | 16 |
| 采样率（每秒）： | 15 |
| 数据接口： | 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： | 8-VFDFN 裸露焊盘 |
| 供应商设备封装： | 8-DFN（2x3） |
| 包装： | 管件 |
| 输入数目和类型： | 2 个差分，单极 |
| 产品目录页面： | 672 (CN2011-ZH PDF) |
第1页第2页第3页第4页第5页第6页当前第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页第51页第52页第53页第54页第55页第56页
2009 Microchip Technology Inc.
DS22226A-page 15
MCP3426/7/8
4.9
Digital Output Codes and
Conversion to Real Values
4.9.1
DIGITAL OUTPUT CODE FROM
DEVICE
The digital output code is proportional to the input
voltage and PGA settings. The output data format is a
binary two’s complement. With this code scheme, the
MSB can be considered a sign indicator. When the
MSB is a logic ‘0’, the input is positive. When the MSB
is a logic ‘1’, the input is negative. The following is an
example of the output code:
(a) for a negative full scale input voltage: 100...000
Example: (CHn+ - CHn-)
PGA = -2.048V
(b) for a zero differential input voltage: 000...000
Example: (CHn+ - CHn-) = 0
(c) for a positive full scale input voltage: 011...111
Example: (CHn+ - CHn-)
PGA = 2.048V
The MSB (sign bit) is always transmitted first through
the I2C serial data line. The resolution for each
conversion is 16, 14, or 12 bits depending on the
conversion rate selection bit settings by the user.
The output codes will not roll-over even if the input
voltage exceeds the maximum input range. In this
case, the code will be locked at 0111...11 for all
voltages greater than (VREF - 1 LSB)/PGA and
1000...00
for
voltages
less
than
-VREF/PGA.
Table 4-2 shows an example of output codes of various
input levels for 16-bit conversion mode. Table 4-3
shows an example of minimum and maximum output
codes for each conversion rate option.
The number of output code is given by:
EQUATION 4-2:
The LSB of the data conversion is given by:
EQUATION 4-3:
Table 4-1 shows the LSB size of each conversion rate
setting. The measured unknown input voltage is
obtained by multiplying the output codes with LSB. See
the following section for the input voltage calculation
using the output codes.
TABLE 4-1:
RESOLUTION SETTINGS VS.
LSB
TABLE 4-2:
EXAMPLE OF OUTPUT CODE
FOR 16 BITS (NOTE 1, NOTE 2)
TABLE 4-3:
MINIMUM AND MAXIMUM
OUTPUT CODES (NOTE)
Number of Output Code =
Maximum Code
1
+
() PGA
CHn+
CHn-
–
()
2.048V
-----------------------------------------
×
=
Where:
See Table 4-3 for Maximum Code
LSB
2
V
REF
×
2
N
----------------------
2
2.048V
×
2
N
--------------------------
==
Where:
N
=
Resolution, which is programmed in
the Configuration Register: 12, 14,
or 16.
Resolution Setting
LSB
12 bits
1 mV
14 bits
250 V
16 bits
62.5 V
Input Voltage:
[CHn+ - CHn-] PGA
Digital Output Code
≥ V
REF
0111111111111111
VREF - 1 LSB
0111111111111111
2LSB
0000000000000010
1LSB
0000000000000001
0
0000000000000000
-1 LSB
1111111111111111
-2 LSB
1111111111111110
- VREF
1000000000000000
< -VREF
1000000000000000
Note 1:
MSB is a sign indicator:
0
: Positive input (CHn+ > CHn-)
1
: Negative input (CHn+ < CHn-)
2:
Output data format is binary two’s
complement.
Resolution
Setting
Data Rate
Minimum
Code
Maximum
Code
12
240 SPS
-2048
2047
14
60 SPS
-8192
8191
16
15 SPS
-32768
32767
Note:
Maximum n-bit code = 2N-1 - 1
Minimum n-bit code = -1 x 2N-1
相关PDF资料 |
PDF描述 |
|---|---|
| VE-J4X-MY-F3 | CONVERTER MOD DC/DC 5.2V 50W |
| LM2901M | IC COMPARATOR QUAD 14-SOP |
| VE-J4X-MY-F2 | CONVERTER MOD DC/DC 5.2V 50W |
| VI-2WR-MY-B1 | CONVERTER MOD DC/DC 7.5V 50W |
| VE-J4X-MY-F1 | CONVERTER MOD DC/DC 5.2V 50W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP3426A0T-E/MC | 功能描述:模数转换器 - ADC 16-bit delta-sigma ADC dual chan 15sps RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MCP3426A0T-E/MS | 功能描述:模数转换器 - ADC 16-bit delta-sigma ADC dual chan 15sps RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MCP3426A0T-E/SN | 功能描述:模数转换器 - ADC 16-bit delta-sigma ADC dual chan 15sps RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MCP3426A1-E/MC | 功能描述:模数转换器 - ADC 18bit deltasigma ADC single channel, 4sps RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MCP3426A1-E/MS | 功能描述:模数转换器 - ADC 18bit deltasigma ADC single channel, 4sps RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
发布紧急采购，3分钟左右您将得到回复。