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NE567N Datasheet(PDF) 7 Page - NXP Semiconductors

Part # NE567N
Description  Tone decoder/phase-locked loop
Download  13 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

NE567N Datasheet(HTML) 7 Page - NXP Semiconductors

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Philips Semiconductors Linear Products
Product specification
NE/SE567
Tone decoder/phase-locked loop
April 15, 1992
409
TYPICAL RESPONSE
Response to 100mVRMS Tone Burst
Response to Same Input Tone Burst
With Wideband Noise
INPUT
OUTPUT
OUTPUT
INPUT
NOTES:
NOTE:
RL = 100Ω
S/N = –6dB
Noise Bandwidth = 140Hz
RL = 100Ω
3. The value of C3 is generally non-critical. C3 sets the band edge
of a low-pass filter which attenuates frequencies outside the
detection band to eliminate spurious outputs. If C3 is too small,
frequencies just outside the detection band will switch the output
stage on and off at the beat frequency, or the output may pulse
on and off during the turn-on transient. If C3 is too large, turn-on
and turn-off of the
Figure 1.
INPUT
3
5
6
2
7
1
8
4
+V
+V
OUTPUT
FILTER
LOW
PASS
FILTER
567
R1
RL
R2
C3
C2
C1
f
O +
1
R
1
C
1
output stage will be delayed until the voltage on C3 passes the
threshold voltage. (Such delay may be desirable to avoid spurious
outputs due to transient frequencies.) A typical minimum value for
C3 is 2C2.
4. Optional resistor R2 sets the threshold for the largest “no output”
input voltage. A value of 130k
Ω is used to assure the tested limit
of 10mVRMS min. This resistor can be referenced to ground for
increased sensitivity. The explanation can be found in the
“optional controls” section which follows.
AVAILABLE OUTPUTS (Figure 1)
The primary output is the uncommitted output transistor collector,
Pin 8. When an in-band input signal is present, this transistor
saturates; its collector voltage being less than 1.0 volt (typically
0.6V) at full output current (100mA). The voltage at Pin 2 is the
phase detector output which is a linear function of frequency over
the range of 0.95 to 1.05 fO with a slope of about 20mV per percent
of frequency deviation. The average voltage at Pin 1 is, during lock,
a function of the in-band input amplitude in accordance with the
transfer characteristic given. Pin 5 is the controlled oscillator square
wave output of magnitude (+V -2VBE)≅(+V-1.4V) having a DC
average of +V/2. A 1k
Ω load may be driven from pin 5. Pin 6 is an
exponential triangle of 1VP-P with an average DC level of +V/2. Only
high impedance loads may be
Figure 2. Typical Output Response
THRESHOLD VOLTAGE
VREF
4.0
3.5
3.0
2.5
0
100
200mVrms
IN-BAND
INPUT
VOLTAGE
PIN 1
VOLTAGE
(AVG)
f1 = fO
7%
BW
VCE (SAT) < 1.0V
14%
V+
0
3.9V
3.8V
3.7V
1.1fO
fO
0.9fO
LOW PASS
FILTER
(PIN 2)
OUTPUT
(PIN 8)


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