參數(shù)資料
型號: LTC1297BCJ8#PBF
廠商: LINEAR TECHNOLOGY CORP
元件分類: ADC
英文描述: 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, CDIP8
封裝: 0.300 INCH, HERMETIC SEALED, CERAMIC, DIP-8
文件頁數(shù): 14/24頁
文件大小: 312K
代理商: LTC1297BCJ8#PBF
21
LTC1292/LTC1297
12927fb
If VCC and VREF are not tied together, then VCC should
be turned on first, then VREF. If this sequence cannot be
met, connecting a diode from VREF to VCC is recom-
mended (see Figure 25).
Because a unique input protection structure is used on
the digital input pins, the signal levels on these pins can
exceed the device VCC without damaging the device.
U
S
A
O
PPLICATI
WU
U
I FOR ATIO
Figure 26. “Quick Look” Circuit for the LTC1292
5V
LTC1292/7 F23
1N4148 DIODES
VCC
CLK
DOUT
VREF
CS
+IN
–IN
GND
LTC1292
LTC1297
5V
LTC1292/7 F24
1N4148 DIODES
1k
VCC
CLK
DOUT
VREF
CS
+IN
–IN
GND
LTC1292
LTC1297
Figure 24b. Overvoltage Protection with
Diode Clamps and Current Limiting Resistor
Figure 23. Overvoltage Protection with Clamp Diodes
5V
LTC1292/7 F25
1N4148
5V
VCC
CLK
DOUT
VREF
CS
+IN
–IN
GND
LTC1292
LTC1297
Figure 25. Separate VCC and VREF Supplies
5V
LTC1292/7 F24a
250
1k
VCC
CLK
DOUT
VREF
CS
+IN
–IN
GND
LTC1292
LTC1297
Figure 24a. Overvoltage Protection with
Current Limiting Resistors
TO OSCILLOSCOPE
CD4520
LTC1292/7 F26
Q1
RESET
VDD
EN
CLK
Q2
Q3
Q4
0.1
F
VIN
f/32
+5V
CLOCK IN
1MHz
22
F
CLK
EN
Q2
Q3
Q4
VSS
Q1
RESET
VCC
CLK
DOUT
VREF
CS
+IN
–IN
GND
LTC1292
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