參數(shù)資料
型號(hào)： MCP3425EV
廠商： Microchip Technology
文件頁數(shù)： 4/38頁
文件大?。?/td> 0K
描述： EVALUATION BOARD FOR MCP3425
產(chǎn)品培訓(xùn)模塊： MCP3901 Analog Front End
標(biāo)準(zhǔn)包裝： 1
ADC 的數(shù)量： 1
位數(shù)： 16
采樣率（每秒）： 15 ~ 240
數(shù)據(jù)接口： I²C
輸入范圍： ±2.048 V
工作溫度： -40°C ~ 125°C
已用 IC / 零件： MCP3425
已供物品： 板
產(chǎn)品目錄頁面： 672 (CN2011-ZH PDF)
相關(guān)產(chǎn)品： MCP3425A0T-E/CHDKR-ND - IC ADC 16BIT I2C PROGBL SOT23-6
MCP3425A0T-E/CHCT-ND - IC ADC 16BIT I2C PROGBL SOT23-6
MCP3425A0T-E/CHTR-ND - IC ADC 16BIT I2C PROGBL SOT23-6
MCP3425
DS22072B-page 12
2009 Microchip Technology Inc.
4.9.2
CONVERTING THE DEVICE
OUTPUT CODE TO INPUT SIGNAL
VOLTAGE
When the user gets the digital output codes from the
device as described in Section 4.9.1 “Digital output
code from device”, the next step is converting the
digital output codes to a measured input voltage.
Equation 4-4 shows an example of converting the
output codes to its corresponding input voltage.
If the sign indicator bit (MSB) is ‘0’, the input voltage
is obtained by multiplying the output code with the LSB
and divided by the PGA setting.
If the sign indicator bit (MSB) is ‘1’, the output code
needs to be converted to two’s complement before
multiplied by LSB and divided by the PGA setting.
Table 4-4 shows an example of converting the device
output codes to input voltage.
EQUATION 4-4:
CONVERTING OUTPUT
CODES TO INPUT
VOLTAGE
TABLE 4-4:
EXAMPLE OF CONVERTING OUTPUT CODE TO VOLTAGE (WITH 16 BIT SETTING)
If MSB = 0 (Positive Output Code):
If MSB = 1 (Negative Output Code):
Where:
LSB
=
2’s complement
=
1’s complement + 1
Input Voltage
(Output Code)
LSB
PGA
------------
=
Input Voltage
(2
′s complement of Output Code)
LSB
PGA
------------
=
Input Voltage
[VIN+ - VIN-] PGA]
Digital Output Code
MSB
(sign bit)
Example of Converting Output Codes to Input Voltage
≥ V
REF
0111111111111111
0
(2
14+213+212+211+210+29+28+27+26+25+24+23+22+21+20)x
LSB(
62.5 V)/PGA = 2.048 (V) for PGA = 1
VREF - 1 LSB
0111111111111111
0
(2
14+213+212+211+210+29+28+27+26+25+24+23+22+21+20)x
LSB(
62.5 V)/PGA = 2.048 (V) for PGA = 1
2LSB
0000000000000010
0
(0+0+0+0+0+0+0+0+0+0+0+0+0+2
1+0)x LSB(62.5 V)/PGA
= 125
(μV) for PGA = 1
1LSB
0000000000000001
0
(0+0+0+0+0+0+0+0+0+0+0+0+0+0+2
0)x LSB(62.5 V)/PGA
=
62.5 (
μV)for PGA = 1
0
0000000000000000
0
(0+0+0+0+0+0+0+0+0+0+0+0+0+0+0)x LSB(
62.5 V)/PGA
= 0 (V) for PGA = 1
-1 LSB
1111111111111111
1
-(0+0+0+0+0+0+0+0+0+0+0+0+0+0+2
0)x LSB(62.5 V)/PGA
= -
62.5 (
μV)for PGA = 1
-2 LSB
1111111111111110
1
-(0+0+0+0+0+0+0+0+0+0+0+0+0+2
1+0)x LSB(62.5 V)/PGA
= - 125 (
μV)for PGA = 1
- VREF
1000000000000000
1
-(2
15+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0) x
LSB(
62.5 V)/PGA = - 2.048 (V) for PGA = 1
≤ -V
REF
1000000000000000
1
-(2
15+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0) x
LSB(
62.5 V)/PGA = - 2.048 (V) for PGA = 1
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MCP3426 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:16-Bit, Multi-Channel Analog-to-Digital Converter with I2C Interface and On-Board Reference
MCP3426A0-E/MC 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16-bit delta-sigma ADC dual chan 15sps RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MCP3426A0-E/MS 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16-bit delta-sigma ADC dual chan 15sps RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MCP3426A0-E/SN 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16-bit delta-sigma ADC dual chan 15sps RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MCP3426A0-E/SN 制造商:Microchip Technology Inc 功能描述:A/D (A-D) CONVERTER IC
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