ne567f NXP Semiconductors, ne567f Datasheet - Page 6

• Manufacturer Part Number: ne567f
• Description: Tone Decoder/phase-locked Loop
• Manufacturer: NXP Semiconductors

Philips Semiconductors Linear Products
TYPICAL PERFORMANCE CHARACTERISTICS
DESIGN FORMULAS
Where
PHASE-LOCKED LOOP TERMINOLOGY CENTER
FREQUENCY (f
The free-running frequency of the current controlled oscillator (CCO)
in the absence of an input signal.
Detection Bandwidth (BW)
The frequency range, centered about f
above the threshold voltage (typically 20mV
zero state on the output. The detection bandwidth corresponds to
the loop capture range.
Lock Range
The largest frequency range within which an input signal above the
threshold voltage will hold a logical zero state on the output.
Detection Band Skew
A measure of how well the detection band is centered about the
center frequency, f
where fmax and fmin are the frequencies corresponding to the
edges of the detection band. The skew can be reduced to zero if
necessary by means of an optional centering adjustment.
April 15, 1992
V
C
Tone decoder/phase-locked loop
BW [
f
I
2
O
=Input voltage (V
=Low-pass filter capacitor ( F)
–100
–200
–300
100
[
0
4.5
1.1R
V
Center Frequency Temperature
1070
I
v
1
1
200mV
5.0
C
t = 0 C to 70 C
SUPPLY VOLTAGE — V
1
O
(Mean and SD)
f
O
. The skew is defined as (f
O
Coefficient
V
RMS
5.5
C
)
I
RMS
2
)
in % of f
6.0
6.5
O
O
, within which an input signal
7.0
RMS
Dt
t
MAX
O
O
) will cause a logical
V *
+f
MIN
% V
-2f
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
O
0
)/2f
1
O
(Continued)
2
Operating Frequency
CENTER FREQUENCY — kHz
Voltage Change vs
Center Frequency
Shift With Supply
3 4 5
408
OPERATING INSTRUCTIONS
Figure 1 shows a typical connection diagram for the 567. For most
applications, the following three-step procedure will be sufficient for
choosing the external components R
1. Select R1 and C1 for the desired center frequency. For best
2. Select the low-pass capacitor, C
10
temperature stability, R1 should be between 2K and 20K ohm,
and the combined temperature coefficient of the R1C1 product
should have sufficient stability over the projected temperature
range to meet the necessary requirements.
versus Input Signal Amplitude graph. If the input amplitude
Variation is known, the appropriate value of f
give the desired bandwidth may be found. Conversely, an area of
operation may be selected on this graph and the input level and
C2 may be adjusted accordingly. For example, constant
bandwidth operation requires that input amplitude be above
200mV
controlled solely by the f
20
RMS
40
. The bandwidth, as noted on the graph, is then
100
15.0
12.5
10.0
O
7.5
5.0
2.5
0
–75
C
Typical Bandwidth Variation
2
product (f
2
1
, by referring to the Bandwidth
–25
, C
BANDWIDTH AT 25 C
Temperature
1
TEMPERATURE – C
, C
0
O
2
14
12
10
(Hz), C2( F)).
8
6
4
2
and C
NE/SE567
25
Product specification
O
C
3
2
.
necessary to
75
125