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参数资料
| 型号： | 5962P0052401QGA |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 比较器 |
| 英文描述： | COMPARATOR, 4000 uV OFFSET-MAX, 200 ns RESPONSE TIME, MBCY8 |
| 封装： | METAL CAN, TO-5, 8 PIN |
| 文件页数： | 3/28页 |
| 文件大小： | 674K |
| 代理商： | 5962P0052401QGA |
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8.0 Application Hints (Continued)
7.
When both inputs of the LM111 are connected to active
signals, or if a high-impedance signal is driving the
positive input of the LM111 so that positive feedback
would be disruptive, the circuit of
Figure 1 is ideal. The
positive feedback is to pin 5 (one of the offset adjust-
ment pins). It is sufficient to cause 1 to 2 mV hysteresis
and sharp transitions with input triangle waves from a
few Hz to hundreds of kHz. The positive-feedback signal
across the 82
resistor swings 240 mV below the posi-
tive supply. This signal is centered around the nominal
voltage at pin 5, so this feedback does not add to the
V
OS of the comparator. As much as 8 mV of VOS can be
trimmed out, using the 5 k
pot and 3 k resistor as
shown.
8.
These application notes apply specifically to the LM111,
LM211, LM311, and LF111 families of comparators, and
are applicable to all high-speed comparators in general,
(with the exception that not all comparators have trim
pins).
DS005704-29
Pin connections shown are for LM111H in the H08 hermetic package
FIGURE 1. Improved Positive Feedback
DS005704-30
Pin connections shown are for LM111H in the H08 hermetic package
FIGURE 2. Conventional Positive Feedback
LM1
1
1/LM21
1/LM31
1
www.national.com
11
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