TDA8732 [NXP]
NICAM-728 demodulator NIDEM; NICAM - 728解调NIDEM
| 型号： | TDA8732 |
| 厂家： | 
NXP |
| 描述： | NICAM-728 demodulator NIDEM |
| 文件： | 总14页 (文件大小：97K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
DATA SHEET
TDA8732
NICAM-728 demodulator (NIDEM)
April 1993
Product specification
File under Integrated Circuits, IC02
Philips Semiconductors
Product specification
NICAM-728 demodulator (NIDEM)
TDA8732
FEATURES
GENERAL DESCRIPTION
• 5 V supplies for analog and digital circuitry
• Low cost application
The NIDEM is a dedicated device providing a DQPSK
(Differential Quadrature Phase Shift Keying) demodulator
for a NICAM-728 system.
The device interfaces with NICAM-728 decoders and
provides data synchronized to a 728 kHz clock (either
supplied externally or by the on-board clock).
The device consists of a costas loop quadrature
demodulator, a bit-rate clock recovery and differential
decoder with parallel-to-serial conversion.
• Improved noise behaviour
• Limiting amplifier for QPSK input
• Suitable with PAL B, G and I NICAM-728 systems.
APPLICATIONS
The Voltage Controlled Oscillator (VCO) used in the
costas loop is achieved with a single-pin crystal oscillator.
A second single-pin crystal oscillator with a divider chain
provides signals at 5.824 MHz and at 728 kHz.
The NIDEM is suitable for PAL B and G (carrier oscillator
crystal at 11.7 MHz) and PAL I (carrier oscillator crystal at
13.104 MHz).
• NICAM-728 systems.
QUICK REFERENCE DATA
Measured over full voltage and temperature ranges.
SYMBOL
VCCA
PARAMETER
analog supply voltage
MIN.
TYP.
MAX.
UNIT
4.5
4.5
4.5
5
5.5
5.5
5.5
0.5
−
V
VCCD
digital supply voltage
analog supply voltage
5
V
VCCA
5
V
VCCA−VCCD differential supply voltage
−0.5
−
−
V
ICCA
ICCD
V3
analog supply current
digital supply current
QPSK input level (peak-to-peak value)
input resistance
12.5
14.5
100
2.5
2
mA
mA
mV
kΩ
pF
−
−
30
1.75
−
300
3.25
−
RI
CI
input capacitance
fCAROSC
fXTAL
carrier oscillator frequency
crystal frequency
11.5
−
13.5
MHz
PAL B, G
−
−
−
11.7
−
−
−
MHz
MHz
MHz
PAL I
13.104
11.648
fCLKOSC
fC5M
clock oscillator frequency
C5M output frequency
−
5.824
−
MHz
ORDERING INFORMATION
EXTENDED
TYPE
NUMBER
PACKAGE
PINS
PIN POSITION
MATERIAL
CODE
SOT146(1)
TDA8732
20
DIL
plastic
Note
1. SOT146-1; 1996 December 3.
April 1993
2
Philips Semiconductors
Product specification
NICAM-728 demodulator (NIDEM)
TDA8732
Fig.1 Block diagram.
April 1993
3
Philips Semiconductors
Product specification
NICAM-728 demodulator (NIDEM)
TDA8732
PINNING
SYMBOL PIN
DESCRIPTION
CLKLPF
VEEA
1
2
3
4
5
6
7
8
9
transconductance output for bit-rate loop low-pass filter
ground for analog circuitry
QPSKIN
VCCA
QPSK modulated data input
power supply for analog circuitry
CFI
baseband cosine channel input after filtering
demodulated cosine channel output to low-pass filter
demodulated sine channel output to low-pass filter
baseband sine channel input after filtering
transconductance output for carrier loop low-pass filter
CFO
SFO
SFI
CARLPF
CAROSC 10
crystal input for carrier oscillator (frequency is 11.7 MHz
or 13.104 MHz)
QMC
11
monostable components connection for quadrature data
transition detector
VCCD
IMC
12
13
power supply for digital circuitry
monostable components connection for in-phase data
transition detector
VEED
14
15
ground for digital circuitry
DATA
728 kbit/s demodulated and differentially decoded serial
data output
CLKIN
CLK
16
17
18
bit-rate clock input at 728 kHz, phase-locked to the data
output clock frequency at 728 kHz
C5M
reference frequency output at
5.824 MHz (8 x CLK)
TEST
19
20
input for test purpose (grounded for normal operation)
crystal input for clock oscillator (frequency is 11.648 MHz)
Fig.2 Pin configuration.
CLKOS
April 1993
4
Philips Semiconductors
Product specification
NICAM-728 demodulator (NIDEM)
TDA8732
FUNCTIONAL DESCRIPTION
QPSK demodulator
Clock oscillator and timing generator
A voltage-controlled oscillator on-board the NIDEM
operates at 11.648 MHz and is divided down to produce a
728 kHz (bit-rate) clock output (CLK) which is phase
locked to the pulse stream and may be used as an
alternative clock input for NIDEM. A reference clock at
5.824 MHz is provided at pin C5M (TTL levels).
The DQPSK signal input to the demodulator (QPSKIN) is
limited and fed into the costas loop demodulator. A
single-pin carrier oscillator (CAROSC), at twice the carrier
frequency, supplies a differential signal to the divider
circuitry, which drives the demodulators with both 0° and
90° phase shift. This produces cosine and sine signals
which are required for the carrier recovery. Cosine
(in-phase) and sine (in Quadrature) channel baseband
filters are then provided externally between pins CFO and
CFI, and SFO and SFI respectively. The two filtered
baseband signals are then processed to provide an error
signal, the magnitude and which of which bear a fixed
relationship to the phase error of the carrier, regardless of
which of the four rest-states the signal occupies. The
carrier recovery loop is closed with the aid of a single pin
loop filter connection at CARLPF, which filters the error
voltage signal to control the 728 kHz as shown in
application diagrams Fig.4 and 5.
Differential decoder and parallel-to-serial converter
The recovered symbol-rate clocking-signal (364 kHz)
produced internally is passed to the demodulator where it
samples the sliced raised cosine pulse stream. The
recovered bit-rate clocking-signal is passed to the decoder
and is used to differentially decode the demodulated data
signal and reform it into a serial bit-stream.
Bit-rate clock recovery loop
The CFI and SFI channels are processed using edge
detectors and monostables, with externally derived time
constants (see Fig.3), to generate a signal with a coherent
component at the data bit symbol rate. This signal is
compared with the clock derived from CLKIN and used to
produce an error signal at the transconductance output
CLKLPF. This error signal is loop-filtered and used to
control the clock generator (at CLKOSC if the on-board
clock is used; see Fig.5).
April 1993
5
Philips Semiconductors
Product specification
NICAM-728 demodulator (NIDEM)
TDA8732
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
PARAMETER
analog supply voltage
MIN.
−0.3
MAX.
UNIT
VCCA
VCCD
6
6
V
digital supply voltage
−0.3
−0.3
−0.3
−0.3
−0.3
−0.3
−0.3
−0.3
−0.3
−0.3
−0.3
−0.3
−0.3
−0.3
−0.3
−0.3
0
V
QPSKIN
CFI
modulated data input voltage
baseband cosine channel input voltage
baseband sine channel input voltage
demodulated cosine channel output voltage
demodulated sine channel output voltage
crystal input voltage for carrier oscillator
crystal input voltage for clock oscillator
monostable output voltage
5.5
VCCA
VCCA
5.5
5.5
5.5
5.5
VCCD
5.5
5.5
5.5
6
V
V
SFI
V
CFO
V
SFO
V
CAROSC
CLKOSC
QMC,IMC
DATA
CLK
V
V
V
data output voltage
V
clock output voltage
V
C5M
reference frequency output voltage
bit-rate clock input voltage
V
CLKIN
TEST
CLKLPF
CARLPF
Tamb
V
input voltage for test purpose
bit-rate loop output voltage
6
V
5.5
5.5
70
V
carrier loop output voltage
V
operating ambient temperature
storage temperature
°C
°C
°C
Tstg
−40
−
+125
+125
Tj
maximum junction temperature
THERMAL RESISTANCE
SYMBOL
PARAMETER
THERMAL RESISTANCE
80 K/W
Rth j-a
from junction to ambient in free air
April 1993
6
Philips Semiconductors
Product specification
NICAM-728 demodulator (NIDEM)
TDA8732
CHARACTERISTICS
VCCA = 5 V ± 10%; VCCD = 5 V ± 10%; −0.5 V < VCCA − VCCD < 0.5 V; Tamb = 0 to 70 °C; unless otherwise specified.
SYMBOL
Supply
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
VCCA
VCCD
analog supply voltage
digital supply voltage
4.5
4.5
5
5
−
5.5
V
5.5
0.5
17
V
VCCA−VCCD differential supply voltage
−0.5
V
ICCA
ICCD
Ptot
analog supply current
digital supply current
total power dissipation
−
−
−
13
mA
mA
mW
13
17
130
187
Inputs
CLKIN
VIH
VIL
IIH
HIGH level input voltage
LOW level input voltage
HIGH level input current
LOW level input current
2
−
−
−
−
VCCD
0.8
10
V
−
V
VI = 5 V
−
µA
µA
IIL
VI = 0 V
−400
−
QPSKIN
fQPSKIN
RI
input frequency
input resistance
input capacitance
5
−
7
MHz
kΩ
f = 6 MHz
f = 6 MHz
1.75
−
2.5
2
3.25
−
CI
pF
SFI, CFI
Ib
input bias current
VSFI = 4.3 V;
VCFI = 4.3 V
−
−
5
µA
RI
CI
input resistance
f = 364 kHz
f = 364 kHz
70
100
2
130
kΩ
input capacitance
−
−
pF
CAROSC
fcar
oscillator frequency
11.5
−
13.5
MHz
CARRIER OSCILLATOR CRYSTAL
holder
RW 43
nominal frequency with specified
load
PAL I
CL = 15 pF
fPAL I
−
−
13.104
11.7
−
−
MHz
MHz
fPAL B, G
PAL B, G
vibration mode
circuit condition
fundamental
series resonance
adjustment tolerance on frequency
−30
−
+30
10−6
at 25 °C
temperature
0
−
−
70
°C
10−6
frequency stability over
temperature
−30
+30
CL
load capacitance
−
15
−
pF
April 1993
7
Philips Semiconductors
Product specification
NICAM-728 demodulator (NIDEM)
TDA8732
SYMBOL
Rs
PARAMETER
CONDITIONS
note 1
MIN.
TYP.
MAX.
40
UNIT
resonance resistance
motional capacitance
parallel capacitance
drive power level
15
−
−
Ω
Cm
Cp
21
−
−
fF
−
5
pF
mW
−
−
0.5
CLKOSC
fclk
oscillator frequency
Cl = 15 pF
CL = 15 pF
−
11.648
RW 43
−
MHz
BIT-RATE OSCILLATOR CRYSTAL
holder
nominal frequency with specified
load
PAL I
fPAL I
−
−
11.648
11.648
−
−
MHz
MHz
fPAL B, G
PAL B, G
vibration mode
circuit condition
fundamental
series resonance
adjustment tolerance on frequency
−30
−
+30
10−6
at 25 °C
temperature
0
−
−
70
°C
10−6
frequency stability over
temperature
−30
+30
CL
Rs
Cm
Cp
load capacitance
resonance resistance
motional capacitance
parallel capacitance
drive level
−
15
−
−
pF
kΩ
fF
note 1
15
−
40
−
21
−
−
5
pF
mW
−
−
0.5
Outputs
CFO, SFO
RO
output impedance
f = 364 kHz
−
110
1
200
Ω
Vamp
signal amplitude (peak-to-peak
value)
0.8
−
V
CARLPF
VOL
LOW level output voltage
HIGH level output voltage
IOL = 100 µA
IOH = −100 µA
VO = 0.4 V to
−
−
0.4
−
V
VOH
V
CCD−1 V
−
V
gm φ1
phase comparator
100
125
−
µA/rd
transconductance gain
VCCD − 1 V
ILO
output leakage current for π/4
phase shift
−5
−
−
5
µA
CLKLPF
VOL
LOW level output voltage
IOL = 100 µA
−
0.4
V
April 1993
8
Philips Semiconductors
Product specification
NICAM-728 demodulator (NIDEM)
TDA8732
SYMBOL
VOH
PARAMETER
CONDITIONS
IOH = −100 µA
VO = 0.4 V to
VCCD−1 V
MIN.
TYP.
MAX.
UNIT
HIGH level output voltage
V
CCD−1 V
−
−
−
V
gm φ2
phase comparator
transconductance gain
50
65
µA/rd
ILO
off-state output leakage current
−5
−
5
µA
IMC, QMC (TYPICAL RC NETWORK; R = 22 KΩ; C = 150 PF)
tREC
ton
monostable recovery time
monostable time
−
−
−
600
ns
1.37
−
µs
CLK, C5M
VOL
VOH
tr
LOW level output voltage
HIGH level output voltage
rise time
IOL = 1 mA
−
−
0.4
VCCD
−
V
IOH = −100 µA
2.4
−
−
V
CL = 15 pF; see Fig.3
CL = 15 pF; see Fig.3
20
20
5.824
ns
ns
MHz
tf
fall time
−
−
fC5M
C5M reference frequency
−
−
DATA
VOL
VOH
tr
LOW level output voltage
HIGH level output voltage
rise time
IOL = 1 mA
−
−
0.4
VCCD
−
V
IOH = −100 µA
2.4
−
−
V
CL = 15 pF; see Fig.3
CL = 15 pF; see Fig.3
30
30
ns
ns
tf
fall time
−
−
CLOCK TIMING
td
td
CLK to C5M delay (pin 17 to 18)
−
−
15
−
ns
ns
CLKIN to DATA delay (pin 16 to 15) VCCD = 4.5 V
520
585
Note
1. Only the maximum value is relevant with a 15 Ω resistor in series with the crystal (due to the application
requirements).
April 1993
9
Philips Semiconductors
Product specification
NICAM-728 demodulator (NIDEM)
TDA8732
Fig.3 Data timing diagram.
April 1993
10
Philips Semiconductors
Product specification
NICAM-728 demodulator (NIDEM)
TDA8732
April 1993
11
Philips Semiconductors
Product specification
NICAM-728 demodulator (NIDEM)
TDA8732
April 1993
12
Philips Semiconductors
Product specification
NICAM-728 demodulator (NIDEM)
TDA8732
PACKAGE OUTLINE
DIP20: plastic dual in-line package; 20 leads (300 mil)
SOT146-1
D
M
E
A
2
A
A
1
L
c
e
w M
Z
b
1
(e )
1
b
M
H
20
11
pin 1 index
E
1
10
0
5
10 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
(1)
A
A
A
(1)
(1)
Z
1
2
UNIT
mm
b
b
c
D
E
e
e
1
L
M
M
H
w
1
E
max.
min.
max.
max.
1.73
1.30
0.53
0.38
0.36
0.23
26.92
26.54
6.40
6.22
3.60
3.05
8.25
7.80
10.0
8.3
4.2
0.51
3.2
2.54
0.10
7.62
0.30
0.254
0.01
2.0
0.068
0.051
0.021
0.015
0.014
0.009
1.060
1.045
0.25
0.24
0.14
0.12
0.32
0.31
0.39
0.33
inches
0.17
0.020
0.13
0.078
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
REFERENCES
OUTLINE
EUROPEAN
PROJECTION
ISSUE DATE
VERSION
IEC
JEDEC
EIAJ
92-11-17
95-05-24
SOT146-1
SC603
April 1993
13
Philips Semiconductors
Product specification
NICAM-728 demodulator (NIDEM)
TDA8732
with the joint for more than 5 seconds. The total contact
time of successive solder waves must not exceed
5 seconds.
SOLDERING
Introduction
There is no soldering method that is ideal for all IC
packages. Wave soldering is often preferred when
through-hole and surface mounted components are mixed
on one printed-circuit board. However, wave soldering is
not always suitable for surface mounted ICs, or for
printed-circuits with high population densities. In these
situations reflow soldering is often used.
The device may be mounted up to the seating plane, but
the temperature of the plastic body must not exceed the
specified maximum storage temperature (Tstg max). If the
printed-circuit board has been pre-heated, forced cooling
may be necessary immediately after soldering to keep the
temperature within the permissible limit.
Repairing soldered joints
This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
our “IC Package Databook” (order code 9398 652 90011).
Apply a low voltage soldering iron (less than 24 V) to the
lead(s) of the package, below the seating plane or not
more than 2 mm above it. If the temperature of the
soldering iron bit is less than 300 °C it may remain in
contact for up to 10 seconds. If the bit temperature is
between 300 and 400 °C, contact may be up to 5 seconds.
Soldering by dipping or by wave
The maximum permissible temperature of the solder is
260 °C; solder at this temperature must not be in contact
DEFINITIONS
Data sheet status
Objective specification
Preliminary specification
Product specification
This data sheet contains target or goal specifications for product development.
This data sheet contains preliminary data; supplementary data may be published later.
This data sheet contains final product specifications.
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
April 1993
14
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