參數(shù)資料
型號: MAX146BCPP
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: ADC
英文描述: +2.7Low-Power, 8-Channel, Serial 12-Bit ADCs
中文描述: 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP20
封裝: 0.300 INCH, PLASTIC, DIP-20
文件頁數(shù): 17/24頁
文件大?。?/td> 198K
代理商: MAX146BCPP
M
+2.7V, Low-Power, 8-Channel,
S erial 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 t
RC
delay of approximately 2M
x C
L
,
where C
L
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 2μs of actively pulling
SHDN
high.
POWERED UP
HARDWARE
POWER-
DOWN
POWERED UP
POWERED UP
12 DATA BITS
12 DATA BITS
INVALID
DATA
VALID
DATA
EXTERNAL
EXTERNAL
S X X X X X 1 1
S
0 0
X
X
X
X
X
X X X X X
S
1 1
SOFTWARE
POWER-DOWN
MODE
DOUT
DIN
CLOCK
MODE
SHDN
SETS EXTERNAL
CLOCK MODE
SETS EXTERNAL
CLOCK MODE
SETS SOFTWARE
POWER-DOWN
POWER-DOWN
POWERED UP
POWERED UP
DATA VALID
DATA VALID
INTERNAL
S X X X X X 1 0
S
0 0
X
X
X
X
X
S
MODE
DOUT
DIN
CLOCK
MODE
SETS INTERNAL
CLOCK MODE
SETS
POWER-DOWN
CONVERSION
CONVERSION
SSTRB
Figure 12a. Timing Diagram Power-Down Modes, External Clock
Figure 12b. Timing Diagram Power-Down Modes, Internal Clock
相關PDF資料
PDF描述
MAX147ACPP +2.7Low-Power, 8-Channel, Serial 12-Bit ADCs
MAX147BCPP +2.7Low-Power, 8-Channel, Serial 12-Bit ADCs
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