Philips TDA8012M-C2, TDA8012M-C1-S1 Datasheet

DATA SH EET

Product specification
Supersedes data of 1995 Feb 02
File under Integrated Circuits, IC02

1996 Mar 26

INTEGRATED CIRCUITS

TDA8012M

Low power PLL FM demodulator
for satellite TV receivers

1996 Mar 26 2

Philips Semiconductors Product specification

Low power PLL FM demodulator
for satellite TV receivers

TDA8012M

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 AFC or peak-to-peak AFC

• Carrier detector

• AGC output

• Suitable for High Definition TV (HDTV).

APPLICATIONS

• Direct Broadcast Satellite (DBS) receivers.

GENERAL DESCRIPTION

The TDA8012M is a sensitive PLL FM demodulator which
is used for the second 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 frequency of the input signal. During the
searching procedure, the AFC output provides a signal
which is used for carrier detection.

QUICK REFERENCE DATA

ORDERING INFORMATION

SYMBOL PARAMETER CONDITION MIN. TYP. MAX. UNIT

V

CC

supply voltage 4.5 5.0 5.5 V

I

CC

supply current VCC=5V; T

amb

=25°C506070mA

V

i

input signal voltage level 53 57 61 dBµV

V

o(p-p)

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

∆fo= 25 MHz (p-p) − 1 − V

f

i

operating input frequency − 480 − MHz

TYPE

NUMBER

PACKAGES

NAME DESCRIPTION VERSION

TDA8012M SSOP20 plastic shrink small outline package; 20 leads; body width 4.4 mm SOT266-1

1996 Mar 26 3

Philips Semiconductors Product specification

Low power PLL FM demodulator
for satellite TV receivers

TDA8012M

BLOCK DIAGRAM

Fig.1 Block diagram.

handbook, full pagewidth

MBE251

3

4

STABILIZER

VCO

VIDEO BUFFER

TDA8012M

1

2

5

6

7
8

9

10

CDF1
CDF2

PD(pos)

PD(neg)

IFI1
IFI2

GND

CC

V

AGCO

th

AGC

VIDEO

LF1

LF2

OSCGND

VCO1

VCO2

NF

KEY

AFC

CDO

AFC

os

20

19
18

17

16

15
14

13

12

11

CARRIER

DETECTOR

AFC

AGC

1996 Mar 26 4

Philips Semiconductors Product specification

Low power PLL FM demodulator
for satellite TV receivers

TDA8012M

PINNING

SYMBOL PIN DESCRIPTION

CDF1 1 carrier detector filter 1 input
CDF2 2 carrier detector filter 2 input
PD(pos) 3 positive peak detector output
PD(neg) 4 negative peak detector output
IFI1 5 IF input 1
IFI2 6 IF input 2
GND 7 ground
V

CC

8 supply voltage
AGCO 9 AGC output
AGC

th

10 AGC 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
NF 17 noise filter input
KEY 18 key pulse input
AFC

CDO

19 AFC and carrier detector output
AFC

os

20 AFC offset input

Fig.2 Pin configuration.

book, halfpage

TDA8012M

MBE250

1
2
3
4
5
6
7
8
9

10

20
19
18
17
16
15
14
13
12
11

CDF1

CDF2
PD(pos)
PD(neg)

IFI1

IFI2

GND

V

AGCO

AGC

CC

th

VIDEO

LF1

LF2

OSCGND

VCO1

VCO2

NF

KEY

AFC

AFC

CDO

os

FUNCTIONAL DESCRIPTION

The TDA8012M is a low power PLL FM demodulator
designed for use in satellite TV reception systems.

The demodulator is based on a Phase-Locked Loop (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 via a highly linear video buffer
which has a low output impedance. The centre frequency
of the VCO and the loop characteristics can be set using
external components.

The circuit provides an AGC signal which is used to drive
a gain-controlled IF amplifier (TDA8011T or TDA8010M)
to ensure a stable PLL demodulation characteristic.

An analog AFC voltage is also made available. This signal
can be suitably applied to the input of the ADC port of the
PLL frequency synthesizer (TSA5055). The AFC function
may be keyed to address D2MAC and MUSE systems.

The TDA8012M includes a Carrier Detector (CD) which is
used for channel detection during search procedures.

1996 Mar 26 5

Philips Semiconductors Product specification

Low power PLL FM demodulator
for satellite TV receivers

TDA8012M

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

CHARACTERISTICS

V

CC

=5V; fi= 480 MHz; Vi=57dBµV; T

amb

=25°C; measured in application circuit of Fig.4;

unless otherwise specified.

SYMBOL PARAMETER MIN. MAX. UNIT

V

CC

supply voltage −0.3 6.0 V

V

i(max)

maximum input voltage on all pins −0.3 V

CC

V

I

source(max)

maximum output source current − 10 mA

t

sc

maximum short-circuit time on all outputs − 10 s

Z

L

AC load impedance at video output 600 −Ω

T

stg

storage temperature −55 +150 °C

T

j

junction temperature − +150 °C

T

amb

operating ambient temperature −10 +80 °C

SYMBOL PARAMETER VALUE UNIT

R

th j-a

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

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supplies

V

CC

supply voltage 4.75 5.0 5.25 V

I

CC

supply current note 1 50 60 70 mA

Voltage controlled oscillator

K

VCO

voltage controlled oscillator constant VCC= 4.75 to 5.25 V;

T

amb

= −10 το +80 °C

22.5 25 27.5 MHz/V

δf

o

/δT voltage controlled oscillator drift note 2 −−70 × 10−6−°C

−1

∆f

o

voltage controlled oscillator shift VCC= 4.75 to 5.25 V −− ±750 kHz

Frequency demodulator

V

i

input signal voltage level note 3 53 57 61 dBµV

Z

i

input impedance real part; note 4 − 50 −Ω

parallel inductive part;
note 4

− 130 − nH

K

PD

phase detector constant Vi=57dBµV − 0.37 − V/rad

G

v

phase-lock loop gain drift; note 5 − 2 − dB

shift; note 5 − 2 − dB