參數(shù)資料
型號(hào)： MCP3423-E/MF
廠商： Microchip Technology
文件頁數(shù)： 8/58頁
文件大?。?/td> 0K
描述： IC ADC 18BIT 3.75SPS 2CH 10-DFN
產(chǎn)品培訓(xùn)模塊： MCP3901 Analog Front End
標(biāo)準(zhǔn)包裝： 120
位數(shù)： 18
采樣率（每秒）： 3.75
數(shù)據(jù)接口： I²C，串行
轉(zhuǎn)換器數(shù)目： 1
電壓電源： 單電源
工作溫度： -40°C ~ 125°C
安裝類型： 表面貼裝
封裝/外殼： 10-VFDFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 10-DFN-EP（3x3）
包裝： 管件
輸入數(shù)目和類型： 4 個(gè)單端，雙極；2 個(gè)差分，雙極
產(chǎn)品目錄頁面： 672 (CN2011-ZH PDF)
配用： MCP3423EV-ND - BOARD EVAL 18BIT 2CH ADC MCP3423
MCP3422/3/4
DS22088C-page 16
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 18 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
[CHn+ - CHn-]
PGA]
Digital Output Code
MSB
Example of Converting Output Codes to Input Voltage
≥ V
REF
011111111111111111
0
(2
16+215+214+213+212+211+210+29+28+27+26+25+24+23+22+21+20)
x LSB(15.625
μV)/PGA = 2.048 (V) for PGA = 1
VREF - 1 LSB
011111111111111111
0
(2
16+215+214+213+212+211+210+29+28+27+26+25+24+23+22+21+20)
x LSB(15.625
μV)/PGA = 2.048 (V) for PGA = 1
2LSB
000000000000000010
0
(0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+2
1+0)x LSB(15.625
μV)/PGA
= 31.25
(μV) for PGA = 1
1LSB
000000000000000001
0
(0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+2
0)x LSB(15.625
μV)/PGA
= 15.625 (
μV)for PGA = 1
0
000000000000000000
0
(0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0)x LSB(15.625
μV)/PGA
= 0 V (V) for PGA = 1
-1 LSB
111111111111111111
1
-(0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+2
0)x LSB(15.625
μV)/PGA
= - 15.625 (
μV)for PGA = 1
-2 LSB
111111111111111110
1
-(0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+2
1+0)x LSB(15.625
μV)/PGA
= - 31.25 (
μV)for PGA = 1
- VREF
100000000000000000
1
-(2
17+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0) x
LSB(15.625
μV)/PGA = - 2.048 (V) for PGA = 1
≤ -V
REF
100000000000000000
1
-(2
17+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0) x
LSB(15.625
μV)/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
MCP3423EV 功能描述:開發(fā)板和工具包 - PIC / DSPIC MCP3423 Eval Board for PICKit Serial RoHS:否 制造商:Microchip Technology 產(chǎn)品:Starter Kits 工具用于評(píng)估:chipKIT 核心:Uno32 接口類型: 工作電源電壓:
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MCP3423T-E/MS 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:18-Bit, Multi-Channel ???￡ Analog-to-Digital Converter with I2Ca?￠ Interface and On-Board Reference
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