ne568a NXP Semiconductors, ne568a Datasheet

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ne568a

Manufacturer Part Number
ne568a
Description
150mhz Phase-locked Loop
Manufacturer
NXP Semiconductors
Datasheet

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Philips Semiconductors
DESCRIPTION
The NE568A is a monolithic phase-locked loop (PLL) which
operates from 1Hz to frequencies in excess of 150MHz and features
an extended supply voltage range and a lower temperature
coefficient of the V
predecessor, the NE 568. The NE568A is function and
pin-compatible with the NE568, requiring only minor changes in
peripheral circuitry (see Figure 3). Temperature compensation
network is different, no resistor on Pin 12, needs to be grounded and
Pin 13 has a 3.9k resistor to ground. Timing cap, C
and for 70MHz operation with temperature compensation network
should be 16pF, not 34pF as was used in the NE568. The NE568A
has the following improvements: ESD protected; extended V
range from 4.5V to 5.5V; operating temperature range -55 to 125 C
(see Signetics Military 568A data sheet); less layout sensitivity; and
lower T
of a limiting amplifier, a current-controlled oscillator (ICO), a phase
detector, a level shift circuit, V/I and I/V converters, an output buffer,
and bias circuitry with temperature and frequency compensating
characteristics. The design of the NE568A is particularly well-suited
for demodulation of FM signals with extremely large deviation in
systems which require a highly linear output. In satellite receiver
applications with a 70MHz IF, the NE568A will demodulate 20%
deviations with less than 1.0% typical non-linearity. In addition to
high linearity, the circuit has a loop filter which can be configured
with series or shunt elements to optimize loop dynamic
performance. The NE568A is available in 20-pin dual in-line and
20-pin SO (surface mounted) plastic packages.
FEATURES
ORDERING INFORMATION
BLOCK DIAGRAM
1996 Feb 1
20-Pin Plastic Small Outline Large (SOL) Package
20-Pin Plastic Dual In-Line Package (DIP)
20-Pin Plastic Small Outline Large (SOL) Package
20-Pin Plastic Dual In-Line Package (DIP)
Operation to 150MHz
High linearity buffered output
NOTE:
Pins 4 and 5 can tolerate
1000V only, and all other
pins, greater than 2000V
for ESD (human body
model).
150MHz phase-locked loop
C
of VCO (center frequency). The integrated circuit consists
CO
center frequency in comparison with its
DESCRIPTION
V
LF1
CC2
DETECTOR
20
1
PHASE
GND
LF2
19
2
2
2
, is different
GND
LF3
LEVEL SHIFT
Figure 2. Block Diagram
CONVERTER
18
3
CC
1
V/I
LF4
TCAP1
17
4
1
ICO
FREQ ADJ
PIN CONFIGURATION
APPLICATIONS
CONVERTER
TEMPERATURE RANGE
TCAP2
Series or shunt loop filter component capability
External loop gain control
Temperature compensated
ESD protected
Satellite receivers
Fiber optic video links
VHF FSK demodulators
Clock Recovery
16
5
I/V
-40 to +85 C
-40 to +85 C
0 to +70 C
0 to +70 C
OUT
GND1
OUT
BUF
15
6
FILT
PNPBYP
1
REFBYP
INPBYP
TCAP1
TCAP2
V
GND
GND
V
GND1
Figure 1. Pin Configuration
LEVEL SHIFT
CC2
CC1
V
V
OUT
CC1
2
1
14
7
10
1
2
3
4
5
6
7
8
9
D, N Packages
TC
TOP VIEW
REFBYP
TCADJ
ADJ2
13
8
ORDER CODE
NE568AD
NE568AN
SA568AD
SA568AN
TC
BIAS
PNPBYP
20
19
18
17
16
15 OUT
14
13
12
11
ADJ1
12
9
NE/SA568A
AMP
TC
TC
LF1
LF2
LF3
LF4
FREQ ADJ
V
V
Product specification
OUT
IN
ADJ2
ADJ1
FILT
V
INPBYP
853-1558 16328
IN
11
10
SOT163-1
SOT146-1
SOT163-1
SOT146-1
DWG #
SR01037
SR01038

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ne568a Summary of contents

Page 1

... Pin 12, needs to be grounded and Pin 13 has a 3.9k resistor to ground. Timing cap, C and for 70MHz operation with temperature compensation network should be 16pF, not 34pF as was used in the NE568. The NE568A has the following improvements: ESD protected; extended V range from 4.5V to 5.5V; operating temperature range -55 to 125 C (see Signetics Military 568A data sheet) ...

Page 2

... JA ELECTRICAL CHARACTERISTICS The elctrical characteristics listed below are actual tests (unless otherwise stated) performed on each device with an automatic IC tester prior to shipment. Performance of the device in automated test set-up is not necessarily optimum. The NE568A is DC ELECTRICAL CHARACTERISTICS 70MHz, Test Circuit Figure 3, f ...

Page 3

... The loop filter determines the dynamic characteristics of the loop. In most PLLs, the phase detector outputs are internally connected to the ICO inputs. The NE568A was designed with filter output to input connections from Pins 20 ( DET (ICO), and Pins 19 ( DET (ICO) external. This allows the use of both series and shunt loop-filter elements ...

Page 4

... Also 2p350Wf BW(Hz) This capacitance determines the signal bandwidth of the output buffer amplifier. (For further inofrmation see Philips application note AN1881 “The NE568A Phase Locked Loop as a Wideband Video Demodulator”. Parts List and Layout 40MHz Application NE568AD C 100nF 10% Ceramic chip 1 1 ...

Page 5

... Z IN 500.0 250.0 0.0 1.0 10.0 100.0 FREQUENCY (MHz) Figure 6. NE568A Input Impedance With CP = 0.5pF 20-Pin SO Package 1996 Feb 1 GND Figure 4. N Package Layout (Not Actual Size) GND V CC INPUT Figure 5. D Package Layout (Not Actual Size) 1.25E3 1.0E3 750 ...

Page 6

Philips Semiconductors 150MHz phase-locked loop 4.0 3.5 3.0 2 100 110 120 FREQUENCY (MHz) Figure 8. Typical Output Linearity 100 F MHz ...

Page 7

... Philips Semiconductors 150MHz phase-locked loop 12.0 11.5 11.0 10.5 10.0 9.5 9.0 8.5 8.0 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3 150pF 2.5 2 Figure 10. NE568A: R (Pin 13 RFC1 0 GND J1 RFC2 0.1 F *NOTE: For 75 output impedance, use 1996 Feb 16pF 100 110 F MHz O ; Choosing the Optimum Temperature Compensation Resistor ...

Page 8

... Philips Semiconductors 150MHz phase-locked loop +5V GND Figure 12. NE568AN Board Layout (Not Actual Size) 1996 Feb 1 COMPONENTS LAYOUT NE568AN 70MHz RFC1 PLL10569 C11 R6 C2 C12 OUT C7 R5 TOP BOTTOM 8 Product specification NE/SA568A SR01114 ...

Page 9

... Philips Semiconductors 150MHz phase-locked loop +5V GND J1 NE568AD 70MHz PLL10570 Figure 13. NE568AD Board Layout (Not Actual Size) 1996 Feb 1 R6 C10 560pF 1. 0.1 F 47pF VOUT C11 47pF 43 R3 0.1 F C12 J3 0.1 F 0.1 F C13 Product specification NE/SA568A SR01115 ...

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