參數(shù)資料
型號: 5962-9560301QPA
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 運算放大器
英文描述: DUAL OP-AMP, 500 uV OFFSET-MAX, 0.06 MHz BAND WIDTH, CDIP8
封裝: CERAMIC, DIP-8
文件頁數(shù): 5/23頁
文件大?。?/td> 775K
代理商: 5962-9560301QPA
Typical Single-Supply Applications
TRANSDUCER INTERFACE CIRCUITS
Photocells can be used in portable light measuring instru-
ments. The LMC6462, which can be operated off a battery, is
an excellent choice for this circuit because of its very low in-
put current and offset voltage.
LMC6462 AS A COMPARATOR
Figure 17 shows the application of the LMC6462 as a com-
parator. The hysteresis is determined by the ratio of the two
resistors. The LMC6462 can thus be used as a micropower
comparator, in applications where the quiescent current is an
important parameter.
HALF-WAVE AND FULL-WAVE RECTIFIERS
In
Figure 18 Figure 19,R
I limits current into the amplifier
since excess current can be caused by the input voltage ex-
ceeding the supply voltage.
PRECISION CURRENT SOURCE
The output current I
OUT is given by:
OSCILLATORS
For single supply 5V operation, the output of the circuit will
swing from 0V to 5V. The voltage divider set up R
2,R3 and
R
4 will cause the non-inverting input of the LMC6462 to
move from 1.67V (13 of 5V) to 3.33V (23 of 5V). This voltage
behaves as the threshold voltage.
R
1 and C1 determine the time constant of the circuit. The fre-
quency of oscillation, f
OSC is
DS012051-22
FIGURE 16. Photo Detector Circuit
DS012051-23
FIGURE 17. Comparator with Hysteresis
DS012051-24
FIGURE 18. Half-Wave Rectifier with
Input Current Protection (R
I)
DS012051-25
FIGURE 19. Full-Wave Rectifier
with Input Current Protection (R
I)
DS012051-26
FIGURE 20. Precision Current Source
DS012051-27
FIGURE 21. 1 Hz Square-Wave Oscillator
LMC6462
Dual/LMC6464
Quad
www.national.com
13
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