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MC34001P Ver la hoja de datos (PDF) - Motorola => Freescale

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MC34001P JFET INPUT OPERATIONAL AMPLIFIERS Motorola
Motorola => Freescale Motorola
MC34001P Datasheet PDF : 12 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
MC34001, B MC34002, B MC34004, B
Figure 13. Positive Peak Detector
8 VCC
2 1/2
D1
Vin
3
MC34002
+
1N914
*1 µF
4 VEE
6 1/2
5
MC34002
+
7
VO
Reset
Reset
Network
or Relay
*Polycarbonate capacitor
D1 = Hi–speed, low–reverse leakage diode
Figure 14. Long Interval RC Timer
Figure 15. Isolating Large Capacitive Loads
+15 V
VR
R1
V1
R3
7
2–
MC34001
6
R4
R2
3+ 4
R6
Run
Clear
–15 V
C*
R5
*Polycarbonate or
Polystyrene Capacitor
Time (t) = R4 Cn (VR/VR–VI), R3 = R4, R5 = 0.1 R6
If R1 = R2: t = 0.693 R4C
R2 5.1 k
VO
VCC
20 pF
R1 5.1 k 2
MC34001 +
7
6
CC IO
R3 10
+2.0 V
0
3
4
RL 5.1 k
CL 0.5 µF
–2.0 V
t Overshoot 10%
VEE
ts = 10 µs
When driving large CL, the VO slew rate is determined by CL
and IO(max):
VO = IO
t CL
=
0.02
0.5
V/µs = 0.04 V/µs (with CL shown)
Design Example: 100 Second Timer
VR = 10 V C = l.0 µF R3 = R4 = 144 M
R6 = 20 k R5 = 2.0 k R1 = R2 = 1.0 k
Figure 16. Wide BW, Low Noise,
Low Drift Amplifier
C2
R1
Vin
C1
R2
VCC
7
28
6
^ fmax 240 kHz
10 V
–10 V
3
MC34001
4
VEE
^ Power BW:
fmax
=
Sr
2π Vp
240 kHz
^ Parasitic input capacitance (C1 3.0 pF plus any additional layout capacitance)
^ interacts with feedback elements and creates undesirable high–frequency pole.
To compensate add C2 such that: R2C2 R1C1.
MOTOROLA ANALOG IC DEVICE DATA
7
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