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參數(shù)資料
| 型號： | MAX9119EXK-T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | SC70, 1.8V, Nanopower, Beyond-the-Rails Comparators With/Without Reference |
| 中文描述： | COMPARATOR, 10000 uV OFFSET-MAX, 40000 ns RESPONSE TIME, PDSO5 |
| 封裝： | MO-203, SC-70, 5 PIN |
| 文件頁數(shù)： | 12/13頁 |
| 文件大?。?/td> | 336K |
| 代理商： | MAX9119EXK-T |
M
SC70, 1.8V, Nanopower, Beyond-the-Rails
Comparators With/Without Reference
12
______________________________________________________________________________________
Board Layout and Bypassing
Power-supply bypass capacitors are not typically
needed, but use 100nF bypass capacitors close to the
device
’
s supply pins when supply impedance is high,
supply leads are long, or excessive noise is expected
on the supply lines. Minimize signal trace lengths to
reduce stray capacitance. A ground plane and sur-
face-mount components are recommended. If the REF
pin is decoupled, use a new low-leakage capacitor.
Zero-Crossing Detector
Figure 5 shows a zero-crossing detector application.
The MAX9119
’
s inverting input is connected to ground,
and its noninverting input is connected to a 100mV
P-P
signal source. As the signal at the noninverting input
crosses 0V, the comparator
’
s output changes state.
Logic-Level Translator
The
Typical Application Circuit
shows an application
that converts 5V logic to 3V logic levels. The MAX9120
is powered by the +5V supply voltage, and the pullup
resistor for the MAX9120
’
s open-drain output is con-
nected to the +3V supply voltage. This configuration
allows the full 5V logic swing without creating overvolt-
age on the 3V logic inputs. For 3V to 5V logic-level
translations, simply connect the +3V supply voltage to
V
CC
and the +5V supply voltage to the pullup resistor.
Chip Information
TRANSISTOR COUNT: 98
MAX9120
IN-
2M
2M
R
PULLUP
3V (5V)
LOGIC OUT
OUT
V
CC
+5V (+3V)
+3V (+5V)
V
EE
5V (3V) LOGIC IN
IN+
LOGIC-LEVEL
TRANSLATOR
Typical Application Circuit
V
EE
V
CC
OUT
R3
R2
R1
R4
V
REF
V
IN
V
CC
MAX9118
MAX9120
Figure 4. MAX9118/MAX9120 Additional Hysteresis
MAX9119
IN+
OUT
V
CC
100mV
P-P
V
CC
V
EE
IN-
Figure 5. Zero-Crossing Detector
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