參數(shù)資料
型號(hào)： MAX146BEAP+T
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： ADC
英文描述： +2.7V, Low-Power, 8-Channel, Serial 12-Bit ADCs
中文描述： 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20
封裝： SSOP-20
文件頁(yè)數(shù)： 9/28頁(yè)
文件大小： 746K
代理商： MAX146BEAP+T
MAX146/MAX147
+2.7V, Low-Power, 8-Channel,
Serial 12-Bit ADCs
______________________________________________________________________________________
17
Hardware Power-Down
Pulling SHDN low places the converter in hardware
power-down (Table 6). Unlike software power-down
mode, the conversion is not completed; it stops coin-
cidentally with SHDN being brought low. SHDN also
controls the clock frequency in internal clock mode.
Letting SHDN float sets the internal clock frequency to
1.8MHz. When returning to normal operation with SHDN
floating, there is a tRC delay of approximately 2M
x CL,
where CL is the capacitive loading on the SHDN pin.
Pulling SHDN high sets internal clock frequency to
225kHz. This feature eases the settling-time requirement
for the reference voltage. With an external reference, the
MAX146/MAX147 can be considered fully powered up
within 2s of actively pulling SHDN high.
POWERED UP
HARDWARE
POWER-
DOWN
POWERED UP
12 DATA BITS
INVALID
DATA
VALID
DATA
EXTERNAL
SX XXXX 11
S
0 0
XX
X
X X XXX
S1 1
SOFTWARE
POWER-DOWN
MODE
DOUT
DIN
CLOCK
MODE
SHDN
SETS EXTERNAL
CLOCK MODE
SETS EXTERNAL
CLOCK MODE
SETS SOFTWARE
POWER-DOWN
POWERED UP
DATA VALID
INTERNAL
SX XXXX 10
S
0 0
XX
X
S
MODE
DOUT
DIN
CLOCK
MODE
SETS INTERNAL
CLOCK MODE
SETS
POWER-DOWN
CONVERSION
SSTRB
Figure 12a. Timing Diagram Power-Down Modes, External Clock
Figure 12b. Timing Diagram Power-Down Modes, Internal Clock
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相關(guān)代理商/技術(shù)參數(shù)
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