Datasheet TDA8012AM-C1 Datasheet (Philips)

DATA SH EET

Product specification
File under Integrated Circuits, IC02

1997 May 26

INTEGRATED CIRCUITS

TDA8012AM

Low power PLL FM demodulator for
satellite TV receivers

1997 May 26 2

Philips Semiconductors Product specification

Low power PLL FM demodulator for
satellite TV receivers

TDA8012AM

FEATURES

• High input sensitivity

• Fully balanced two-pin Voltage Controlled Oscillator

(VCO)

• Low input impedance (50 Ω)

• Low impedance video baseband output

• Internal voltage stabilizer

• Keyed Automatic Frequency Control (AFC) or peak AFC

• Carrier detector

• Automatic Gain Control (AGC) output.

APPLICATIONS

• Digital Broadcast System (DBS) satellite receivers.

GENERAL DESCRIPTION

The TDA8012AM is a sensitive Phase Locked Loop (PLL)
Frequency Modulation (FM) demodulator for the second
Intermediate Frequency (IF) in satellite receivers.
It provides Automatic Gain Control (AGC) and Automatic
Frequency Control (AFC) outputs that can be used to
optimize the level and the frequency of the signal applied
at the input. During the search procedure, the AFC output
provides a signal used for carrier detection.

QUICK REFERENCE DATA

ORDERING INFORMATION

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

V

CC

supply voltage 4.75 5.0 5.25 V

I

CC

supply current VCC=5V; T

amb

=25°C 405060mA

V

i

input level 53 57 61 dBµV

f

c

operating carrier frequency − 480 − MHz

V

o(p-p)

video output signal amplitude
(peak-to-peak value)

frequency deviation = 25 MHz − 1 − V

TYPE

NUMBER

PACKAGE

NAME DESCRIPTION VERSION

TDA8012AM SSOP20 plastic shrink small outline package; 20 leads; body width 4.4 mm SOT266-1

1997 May 26 3

Philips Semiconductors Product specification

Low power PLL FM demodulator for
satellite TV receivers

TDA8012AM

BLOCK DIAGRAM

Fig.1 Block diagram.

handbook, full pagewidth

MBH934

3

4

STABILIZER

VCO

VIDEO BUFFER

TDA8012AM

1

2

5

6

7
8

9

10

CDF1
CDF2

PD

+

PD

−

IFI1
IFI2

GND

CC

V

AGCO

V

th(AGC)

VIDEO

LF1

LF2

OSCGND

VCO1

VCO2

AFCF

KEY

AFC/CDO

AFCOS

20

19
18

17

16

15
14

13

12

11

CARRIER

DETECTOR

AFC

AGC

1997 May 26 4

Philips Semiconductors Product specification

Low power PLL FM demodulator for
satellite TV receivers

TDA8012AM

PINNING

SYMBOL PIN DESCRIPTION

CDF1 1 carrier detector filter 1 input
CDF2 2 carrier detector filter 2 input
PD+ 3 positive peak detector output
PD− 4 negative peak detector output
IFI1 5 intermediate frequency input 1
IFI2 6 intermediate frequency input 2
GND 7 general ground
V

CC

8 supply voltage
AGCO 9 automatic gain control output
V

th(AGC)

10 automatic gain control threshold

voltage input
VIDEO 11 baseband signal output
LF1 12 loop filter 1 input
LF2 13 loop filter 2 input
OSCGND 14 oscillator ground
VCO1 15 oscillator tank circuit 1 input
VCO2 16 oscillator tank circuit 2 input
AFCF 17 automatic frequency control filter

input
KEY 18 key pulse input
AFC/CDO 19 automatic frequency control

/carrier detector output
AFCOS 20 automatic frequency control of fset

input

Fig.2 Pin configuration.

handbook, halfpage

TDA8012AM

MBH931

1
2
3
4
5
6
7
8
9

10

20
19
18
17
16
15
14
13
12
11

CDF1

CDF2

IFI1
IFI2

GND

AGCO

V

CC

V

th(AGC)

PD

+

PD

−

AFCOS

VIDEO

LF1

LF2

OSCGND

VCO1

VCO2

AFCF

KEY

AFC/CDO

FUNCTIONAL DESCRIPTION

The TDA8012AM is a low power PLL FM demodulator
designed for use in satellite TV reception systems.

The demodulator is based on a PLL structure including a
fully balanced two-pin VCO. A high gain IF amplifier
ensures a high input sensitivity. The video output voltage
is supplied through a highly-linear video buffer with a low
output impedance. The centre frequency of the VCO and
the loop characteristics can be set by external components
(see Fig.4).

The circuit provides an AGC signal which is used to drive
a gain-controlled IF amplifier (TDA8011T or TDA8010AM)
for a stable PLL demodulation characteristic.

An analog AFC voltage is available. This signal fits in with
the input of the A/D converter port of the PLL frequency
synthesizer (TSA5055). The AFC function may be keyed
to address D2MAC systems.

The TDA8012AM includes a Carrier Detector (CD) used
for channel detection during search procedures.

1997 May 26 5

Philips Semiconductors Product specification

Low power PLL FM demodulator for
satellite TV receivers

TDA8012AM

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).

HANDLING

Inputs and outputs are protected against electrostatic discharge in normal handling. However, to be totally safe it is
desirable to take normal precautions appropriate to handling MOS devices.

THERMAL CHARACTERISTICS

SYMBOL PARAMETER MIN. MAX. UNIT

V

CC

supply voltage −0.3 +6.0 V

V

I(max)

voltage on all pins −0.3 V

CC

V

I

O(max)

output source current − 10 mA

t

sc(max)

maximum short-circuit time on outputs − 10 s

Z

L

AC load impedance at video output 600 −Ω

T

stg

IC storage temperature −55 +150 °C

T

j

junction temperature − 150 °C

T

amb

operating ambient temperature −10 +80 °C

SYMBOL PARAMETER CONDITIONS VALUE UNIT

R

th j-a

thermal resistance from junction to ambient in free air 120 K/W

1997 May 26 6

Philips Semiconductors Product specification

Low power PLL FM demodulator for
satellite TV receivers

TDA8012AM

CHARACTERISTICS

Measured in the application circuit (see Fig.4) with the following conditions: VCC=5V, T

amb

=25°C, fc= 480 MHz,

input level: 57 dBµV; unless otherwise specified.

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supply

V

CC

supply voltage 4.75 5.0 5.25 V

I

CC

supply current note 1 40 50 60 mA

Voltage controlled oscillator

K

VCO

VCO constant 4.75 < VCC< 5.25 V;

−10 < T

amb

<80°C

20 25 30 MHz/V

∆f

VCO(drift)

VCO frequency temperature dependence note 2 − 1 2.5 MHz

∆f

VCO(shift)

VCO frequency voltage dependence 4.75 < VCC< 5.25 V −±300 ±750 kHz

Frequency demodulator

V

i

operating input level note 3 53 57 61 dBµV

f

c

optimal operating carrier frequency − 480 − MHz

Z

i

input impedance note 4

resistive part − 50 −Ω
inductive part − 100 − nH

K

D

phase detector constant Vi=57dBµV − 0.42 − V/rad

L

G

PLL loop gain note 5

drift − 2 − dB
shift − 2 − dB

Z

o

differential output impedance of the
phase detector

1.8 2.3 2.8 kΩ

f

cr(PLL)

PLL capture range note 6 ±20 ±26 − MHz

D

G

differential gain note 7 −±2−%

D

P

differential phase note 7 −±2−deg
IM3 third-order intermodulation distortion note 8 47 −−dB
IM2 second-order intermodulation distortion note 9 45 −−dB

Video output

V

o(p-p)

baseband signal amplitude

(peak-to-peak value)

frequency
deviation = 25 MHz

0.8 1.0 1.2 V

V

O

DC voltage level of video output 2.1 2.35 2.6 V
Z

o

output impedance − 75 −Ω
S/N weighted baseband signal-to-noise ratio note 10 58 61 − dB
S

AM

Amplitude Modulation (AM) sensitivity note 11 − 30 − dB

1997 May 26 7

Philips Semiconductors Product specification

Low power PLL FM demodulator for
satellite TV receivers

TDA8012AM

Notes

1. The DC supply current is measured with VCC=5V.

2. The VCO frequency drift is defined as the change in oscillator frequency for a variation of ambient temperature, on
the one hand from T

amb

=25°CtoT

amb

=0°C and on the other hand from T

amb

=25°CtoT

amb

=50°C. It is
measured in the application of Fig.4 with the following component values for the tank circuit:
Coil: 2.5 turns; diameter 2 mm; adjustable.
Capacitor: miniature ceramic plate capacitor NP0, 3.3 pF.

3. The circuit is designed for an input level of 57 dBµV. The maximum allowable input level for the PLL design is
61 dBµV. However, for levels different from 57 dBµV, the optimum loop filter values will be different from those given
for the 57 dBµV input level in the reference measuring set-up.

4. The input impedance is reduced to a resistor with a parallel reactance. The values are given at 480 MHz. In order to
reduce the radiation from the oscillator to the RF input, it is recommended to use a symmetrical drive.

5. The PLL loop gain shift and drift are given without loop filter shift and drift (non-temperature compensated external
components).

Automatic gain control (note 12)
TH

AGC

automatic gain control threshold as a
function of the voltage applied to pin 10

I

AGCO

= 0.5 mA;

V10= 0.1V

CC

−−53 dBµV

I

AGCO

= 0.5 mA;

V10= 0.9V

CC

61 −−dBµV

note 13 V

th(AGC)

(pin 10) not

connected

− 57 − dBµV

LD level detector

shift V

CC

= 4.75 to 5.25 V − 1 − dB

drift T

amb

= −10 to +80 °C − 1 − dB

S

AGC

automatic gain control steepness I

AGCO

= 0.5 mA; note 14 − 8 − mA/dB

V

sat(AGC)

low level automatic gain control output
saturation voltage

I

AGCO

=1mA − 200 500 mV

Keying pulse

t

key

input keyed pulse time period − 64 −µs

t

W(key)

keyed pulse width 8 −−µs

V

IL

LOW level input keyed pulse voltage key on −−0.8 V

V

IH

HIGH level input keyed pulse voltage key off 3.0 −−V

Z

i

input impedance 1 10 − kΩ
AFC and carrier detector output (note 15)
I

L(pd)

peak detector leakage current note 16 50 150 250 nA

automatic frequency control steepness

with unmodulated input signal

4.5 5.5 6.5 V/MHz

∆f

AFC(shift)

shift of automatic frequency control

voltage with respect to f

VCO

with

unmodulated 480 MHz input signal

∆VCC= ±5% −±180 ±500 kHz

∆f

AFC(drift)

drift of automatic frequency control

voltage with respect to f

VCO

T

amb

=80°C; note 17 −−1.1 − MHz

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

∆V

AFC

∆f

-----------------

1997 May 26 8

Philips Semiconductors Product specification

Low power PLL FM demodulator for
satellite TV receivers

TDA8012AM

6. The capture range or lock-in range is defined as the range where the PLL gets in lock. This value depends strongly
on the loop filter characteristics.

7. Measurements with test signals in accordance with CCIR recommendation 473-3;
FM modulated signal with DBS parameters:

a) 625 lines PAL TV system
b) 16 MHz/V modulator sensitivity
c) 1 V (p-p) video signal
d) No SAW filter is used.

8. No SAW filter is used at the input:
a) 16 MHz/V modulator sensitivity
b) 4.43 MHz sine wave colour signal (660 mV (p-p))
c) 3.25 MHz sine wave luminance signal (700 mV (p-p))
d) CCIR pre-emphasis
e) Intermodulation distance is defined as the distance between the luminance signal and the intermodulation

products.The video output spectrum is measured on pin 11 (point A of Fig.4) with a high resistance probe.
The de-emphasis figure is obtained from the measured data by calculation.

9. No SAW filter is used at the input:
a) 16 MHz/V modulator sensitivity
b) Two sound carriers at 7.02 MHz and 7.20 MHz; 4 MHz deviation
c) Intermodulation measurement without pre-emphasis
d) Intermodulation distance is defined as the distance between one of the sound carriers and the intermodulation

products

e) The video output spectrum is measured on pin 11 (point A of Fig.4) with a high resistance probe and a spectrum

analyser.

10. Measurements are made under the following conditions
a) FM modulator video signal
b) Amplitude level: 57 dBµV
c) Frequency: 479.5 MHz
d) Frequency deviation: 16 MHz
e) CCIR pre-emphasis + unified weighting filter
f) C/N > 50 dB

S/N is measured after de-emphasis with a baseband spectrum from 200 kHz to 5 MHz.

11. The AM sensitivity is defined as the ratio of the baseband output signals obtained from either an AM or FM modulated
RF input signal.

FM modulated signal: f

c

= 480 MHz, frequency deviation = 25 kHz, modulation frequency = 20 kHz, input
level = 57 dBµV
AM modulated signal: f

c

= 480 MHz, modulation depth = 50%, modulation frequency = 20 kHz, input

level = 57 dBµV.

12. The characteristics of the AGC function are measured in the application circuit of Fig.4. The circuit illustrated in Fig.4
has been designed to set the maximum AGC current to 1 mA. The output of the AGC function is capable of handling
up to 5 mA. The maximum AGC current can be increased to 5 mA by decreasing the value of the resistor connected
between pins 8 and 9.

S

AM

20 log

V

o(FM)

V

o(AM)

----------------

=

1997 May 26 9

Philips Semiconductors Product specification

Low power PLL FM demodulator for
satellite TV receivers

TDA8012AM

13. For applications in which a fixed AGC threshold is used, it is recommended to use the internal resistor voltage divider
for lower AGC threshold spread. In this case, the threshold is set to 57 dBµV.

14. In the application circuit (see Fig.4) the voltage at the AGC output decreases when the IF input level increases above
the adjusted AGC threshold.

15. The outputs from the AFC and carrier detector are combined at pin 19 (see Fig.3). During search tuning, when the
input frequency is outside the capture range, the combined output (carrier detector function) is at a LOW level
(any voltage below 0.6VCC). When the PLL becomes locked, the voltage at pin 19 rises to a HIGH level
(V19= 0.8VCCto VCC). When the input channel is close to the centre frequency, V19 falls to the LOW level. As shown
in Fig.3, the voltage at pin 19 is now a function of the centre frequency (AFC function). This information may be read
by a microcontroller via the ADC of the satellite frequency synthesizer (TSA5055) and the I2C-bus.

16. This current discharges the external capacitors between two energy dispersal peak values and avoid the use of
external resistors in parallel with capacitors.

17. The drift of the automatic frequency control voltage is measured in accordance with the following method:
a) At room temperature (T

amb

=25°C) the TDA8012AM is driven by a 480MHz unmodulated signal. The voltage at

pin 20 must be adjusted to obtain a 1.5 V output at the AFC output (pin 19).

b) At T

amb

=80°C, due to its temperature drift, the AFC output voltage differs from 1.5 V. The input frequency must

be adjusted to obtain 1.5 V at the AFC output. Then the VCO frequency f

VCO

is measured in free running mode
(without input signal). The drift of the automatic frequency control voltage will then be equal to the difference
between the input frequency and f

VCO

.

Fig.3 AFC and carrier detector output.

handbook, full pagewidth

MBH932

0

frequency

0.15

0.3

0.45

0.6

0.8

1

AFC DATA

V

19

V

CC

carrier detect on

f

o

500 kHz

1997 May 26 10

Philips Semiconductors Product specification

Low power PLL FM demodulator for
satellite TV receivers

TDA8012AM

APPLICATION INFORMATION

Fig.4 Application circuit.

(1) 2.5 turns; diameter 2.0 mm.
(2) T1, T2 = BC547B.

handbook, full pagewidth

MBH933

3

4

STABILIZER

VCO

VIDEO BUFFER

TDA8012AM

1

2

5

6

7
8

9

10

CC

V

AGCO

V

th(AGC)

1 nF

video

KEY

AFC/CDO

20

19
18

17

16

15

14

13

12

A

11

CARRIER

DETECTOR

AFC

AGC

82 kΩ

2.7 MΩ

22 µF

1 µF

330 nF

330 nF

intermediate

frequency

input

10 nF

10 nF

4.7
kΩ

2.7
kΩ

1.5 kΩ

330 Ω

330 nF

470 µF

75 Ω

680

Ω

15 kΩ

T1

(2)

T2

(2)

+

15 V

−

15 V

1 nF

47

µF

8.2 pF

3.3 pF

(1)

220 pF

10
kΩ

4.7 kΩ

CC

V

1997 May 26 11

Philips Semiconductors Product specification

Low power PLL FM demodulator for
satellite TV receivers

TDA8012AM

PACKAGE OUTLINE

UNIT A

1

A2A

3

b

p

cD

(1)E(1)

(1)

eHELLpQZywv θ

REFERENCES

OUTLINE
VERSION

EUROPEAN

PROJECTION

ISSUE DATE

IEC JEDEC EIAJ

mm

0.1501.4

1.2

0.32

0.20

0.20

0.13

6.6

6.4

4.5

4.3

0.65 1.0 0.2

6.6

6.2

0.65

0.45

0.48

0.18

10

0

o

o

0.13 0.1

DIMENSIONS (mm are the original dimensions)

Note

1. Plastic or metal protrusions of 0.20 mm maximum per side are not included.

0.75

0.45

SOT266-1

90-04-05
95-02-25

w M

θ

A

A

1

A

2

b

p

D

H

E

L

p

Q

detail X

E

Z

e

c

L

v M

A

X

(A )

3

A

y

0.25

110

20

11

pin 1 index

0 2.5 5 mm

scale

SSOP20: plastic shrink small outline package; 20 leads; body width 4.4 mm

SOT266-1

A

max.

1.5

1997 May 26 12

Philips Semiconductors Product specification

Low power PLL FM demodulator for
satellite TV receivers

TDA8012AM

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.

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).

Reflow soldering

Reflow soldering techniques are suitable for all SSOP
packages.

Reflow soldering requires solder paste (a suspension of
fine solder particles, flux and binding agent) to be applied
to the printed-circuit board by screen printing, stencilling or
pressure-syringe dispensing before package placement.

Several techniques exist for reflowing; for example,
thermal conduction by heated belt. Dwell times vary
between 50 and 300 seconds depending on heating
method. Typical reflow temperatures range from
215 to 250 °C.

Preheating is necessary to dry the paste and evaporate
the binding agent. Preheating duration: 45 minutes at
45 °C.

Wave soldering

Wave soldering is not recommended for SSOP packages.
This is because of the likelihood of solder bridging due to
closely-spaced leads and the possibility of incomplete
solder penetration in multi-lead devices.

If wave soldering cannot be avoided, the following
conditions must be observed:

• A double-wave (a turbulent wave with high upward

pressure followed by a smooth laminar wave)
soldering technique should be used.

• The longitudinal axis of the package footprint must

be parallel to the solder flow and must incorporate
solder thieves at the downstream end.

Even with these conditions, only consider wave
soldering SSOP packages that have a body width of

4.4 mm, that is SSOP16 (SOT369-1) or
SSOP20 (SOT266-1).

During placement and before soldering, the package must
be fixed with a droplet of adhesive. The adhesive can be
applied by screen printing, pin transfer or syringe
dispensing. The package can be soldered after the
adhesive is cured.

Maximum permissible solder temperature is 260 °C, and
maximum duration of package immersion in solder is
10 seconds, if cooled to less than 150 °C within
6 seconds. Typical dwell time is 4 seconds at 250 °C.

A mildly-activated flux will eliminate the need for removal
of corrosive residues in most applications.

Repairing soldered joints

Fix the component by first soldering two diagonally­opposite end leads. Use only a low voltage soldering iron
(less than 24 V) applied to the flat part of the lead. Contact
time must be limited to 10 seconds at up to 300 °C. When
using a dedicated tool, all other leads can be soldered in
one operation within 2 to 5 seconds between
270 and 320 °C.

1997 May 26 13

Philips Semiconductors Product specification

Low power PLL FM demodulator for
satellite TV receivers

TDA8012AM

DEFINITIONS

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.

Data sheet status

Objective specification This data sheet contains target or goal specifications for product development.
Preliminary specification This data sheet contains preliminary data; supplementary data may be published later.
Product specification 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.

1997 May 26 14

Philips Semiconductors Product specification

Low power PLL FM demodulator for
satellite TV receivers

TDA8012AM

NOTES

1997 May 26 15

Philips Semiconductors Product specification

Low power PLL FM demodulator for
satellite TV receivers

TDA8012AM

NOTES

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© Philips Electronics N.V. 1997 SCA54
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner.

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Tel. [phone], Fax. [phone]

Colombia: see South America
Czech Republic: see Austria
Denmark: Prags Boulevard 80, PB 1919, DK-2300 COPENHAGEN S,

Tel. [phone], Fax. [phone]
Finland: Sinikalliontie 3, FIN-02630 ESPOO,

Tel. [phone], Fax. [phone]
France: 4 Rue du Port-aux-Vins, BP317, 92156 SURESNES Cedex,

Tel. [phone], Fax. [phone]
Germany: Hammerbrookstraße 69, D-20097 HAMBURG,

Tel. [phone], Fax. [phone]
Greece: No. 15, 25th March Street, GR 17778 TAVROS/ATHENS,

Tel. [phone], Fax. [phone]

Hungary: see Austria
India: Philips INDIA Ltd, Shivsagar Estate, A Block, Dr. Annie Besant Rd.

Worli, MUMBAI 400 018, Tel. [phone], Fax. [phone]

Indonesia: see Singapore
Ireland: Newstead, Clonskeagh, DUBLIN 14,

Tel. [phone], Fax. [phone]
Israel: RAPAC Electronics, 7 Kehilat Saloniki St, PO Box 18053,

TEL AVIV 61180, Tel. [phone], Fax. [phone]
Italy: PHILIPS SEMICONDUCTORS, Piazza IV Novembre 3,

20124 MILANO, Tel. [phone], Fax. [phone]
Japan: Philips Bldg 13-37, Kohnan 2-chome, Minato-ku, TOKYO 108,

Tel. [phone], Fax. [phone]
Korea: Philips House, 260-199 Itaewon-dong, Yongsan-ku, SEOUL,

Tel. [phone], Fax. [phone]
Malaysia: No. 76 Jalan Universiti, 46200 PETALING JAYA, SELANGOR,

Tel. [phone], Fax. [phone]
Mexico: 5900 Gateway East, Suite 200, EL PASO, TEXAS 79905,

Tel. [phone]
Middle East: see Italy

Printed in The Netherlands 547047/1200/01/pp16 Date of release: 1997 May 26 Document order number: 9397 750 01589