参数资料
型号: MCP3208-BI/ST
元件分类: ADC
英文描述: 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO14
封装: 4.4 MM, PLASTIC, TSSOP-14
文件页数: 13/40页
文件大小: 722K
代理商: MCP3208-BI/ST
MCP3204/3208
DS21298E-page 20
2008 Microchip Technology Inc.
FIGURE 5-1:
Communication with the MCP3204 or MCP3208.
FIGURE 5-2:
Communication with MCP3204 or MCP3208 in LSB First Format.
CS
CLK
DIN
DOUT
D1
D2
D0
HI-Z
Don’t Care
Null
Bit B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0*
HI-Z
tSAMPLE
tCONV
SGL/
DIFF
Start
tCYC
tCSH
tCYC
D2
SGL/
DIFF
Start
*
After completing the data transfer, if further clocks are applied with CS low, the A/D converter will output LSB
first data, followed by zeros indefinitely (see Figure 5-2 below).
**
t
DATA: during this time, the bias current and the comparator power down while the reference input becomes
a high impedance node, leaving the CLK running to clock out the LSB-first data or zeros.
tDATA **
tSUCS
Null
Bit B11B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 B10B11
CS
CLK
DOUT
HI-Z
(MSB)
tCONV
tDATA **
Power Down
tSAMPLE
Start
SGL/
DIFF
DIN
tCYC
tCSH
D0
D1
D2
*
After completing the data transfer, if further clocks are applied with CS low, the A/D converter will output zeros
indefinitely.
**
t
DATA: During this time, the bias circuit and the comparator power down while the reference input becomes a
high impedance node, leaving the CLK running to clock out LSB first data or zeroes.
tSUCS
Don’t Care
*
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