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INTEGRATED CIRCUITS
DATA SHEET
TDA8012AM Low power PLL FM demodulator for satellite TV receivers
Product specification File under Integrated Circuits, IC02 1997 May 26
Philips Semiconductors
Product specification
Low power PLL FM demodulator for satellite TV receivers
FEATURES * High input sensitivity * Fully balanced two-pin Voltage Controlled Oscillator (VCO) * Low input impedance (50 ) * 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
TDA8012AM
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 SYMBOL VCC ICC Vi fc Vo(p-p) PARAMETER supply voltage supply current input level operating carrier frequency video output signal amplitude (peak-to-peak value) frequency deviation = 25 MHz VCC = 5 V; Tamb = 25 C CONDITIONS MIN. 4.75 40 53 - - TYP. 5.0 50 57 480 1 MAX. 5.25 60 61 - - UNIT V mA dBV MHz V
ORDERING INFORMATION TYPE NUMBER TDA8012AM PACKAGE NAME SSOP20 DESCRIPTION plastic shrink small outline package; 20 leads; body width 4.4 mm VERSION SOT266-1
1997 May 26
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Philips Semiconductors
Product specification
Low power PLL FM demodulator for satellite TV receivers
BLOCK DIAGRAM
TDA8012AM
handbook, full pagewidth
CDF1 CDF2
1 2
CARRIER DETECTOR 20 AFC 19 18
AFCOS
AFC/CDO KEY
PD+
3
17
AFCF
PD-
4
IFI1 IFI2
5 6 VCO
16 15 14
VCO2 VCO1 OSCGND
GND V CC
7 8 STABILIZER 13 AGC 12 11 VIDEO BUFFER
MBH934
LF2 LF1 VIDEO
AGCO Vth(AGC)
9 10
TDA8012AM
Fig.1 Block diagram.
1997 May 26
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Philips Semiconductors
Product specification
Low power PLL FM demodulator for satellite TV receivers
PINNING SYMBOL CDF1 CDF2 PD+ PD- IFI1 IFI2 GND VCC AGCO Vth(AGC) VIDEO LF1 LF2 OSCGND VCO1 VCO2 AFCF KEY AFC/CDO AFCOS PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 DESCRIPTION carrier detector filter 1 input carrier detector filter 2 input positive peak detector output negative peak detector output intermediate frequency input 1 intermediate frequency input 2 general ground supply voltage automatic gain control output automatic gain control threshold voltage input baseband signal output loop filter 1 input loop filter 2 input oscillator ground oscillator tank circuit 1 input oscillator tank circuit 2 input automatic frequency control filter input key pulse input automatic frequency control /carrier detector output automatic frequency control offset input
Vth(AGC) 10
MBH931
TDA8012AM
handbook, halfpage
CDF1 CDF2 PD+ PD- IFI1 IFI2 GND VCC AGCO
1 2 3 4 5
20 AFCOS 19 AFC/CDO 18 KEY 17 AFCF 16 VCO2
TDA8012AM
6 7 8 9 15 VCO1 14 OSCGND 13 LF2 12 LF1 11 VIDEO
Fig.2 Pin configuration.
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
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Philips Semiconductors
Product specification
Low power PLL FM demodulator for satellite TV receivers
LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL VCC VI(max) IO(max) tsc(max) ZL Tstg Tj Tamb HANDLING supply voltage voltage on all pins output source current maximum short-circuit time on outputs AC load impedance at video output IC storage temperature junction temperature operating ambient temperature PARAMETER MIN. -0.3 -0.3 - - 600 -55 - -10
TDA8012AM
MAX. +6.0 VCC 10 10 - +150 150 +80 V V
UNIT
mA s C C C
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 Rth j-a PARAMETER thermal resistance from junction to ambient CONDITIONS in free air VALUE 120 UNIT K/W
1997 May 26
5
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 = 5 V, Tamb = 25 C, fc = 480 MHz, input level: 57 dBV; unless otherwise specified. SYMBOL Supply VCC ICC KVCO fVCO(drift) fVCO(shift) Vi fc Zi supply voltage supply current note 1 4.75 40 5.0 50 5.25 60 V mA PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
Voltage controlled oscillator VCO constant 4.75 < VCC < 5.25 V; -10 < Tamb < 80 C 4.75 < VCC < 5.25 V note 3 note 4 - - Vi = 57 dBV note 5 - - 1.8 note 6 note 7 note 7 note 8 note 9 20 - - 47 45 2 2 2.3 26 2 2 - - - - 2.8 - - - - - dB dB k MHz % deg dB dB - 50 100 0.42 - - - nH V/rad 20 - - 25 1 300 30 2.5 750 MHz/V MHz kHz
VCO frequency temperature dependence note 2 VCO frequency voltage dependence
Frequency demodulator operating input level optimal operating carrier frequency input impedance resistive part inductive part KD LG phase detector constant PLL loop gain drift shift Zo fcr(PLL) DG DP IM3 IM2 differential output impedance of the phase detector PLL capture range differential gain differential phase third-order intermodulation distortion second-order intermodulation distortion 53 - 57 480 61 - dBV MHz
Video output Vo(p-p) VO Zo S/N SAM baseband signal amplitude (peak-to-peak value) DC voltage level of video output output impedance weighted baseband signal-to-noise ratio Amplitude Modulation (AM) sensitivity note 10 note 11 frequency deviation = 25 MHz 0.8 2.1 - 58 - 1.0 2.35 75 61 30 1.2 2.6 - - - V V dB dB
1997 May 26
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Philips Semiconductors
Product specification
Low power PLL FM demodulator for satellite TV receivers
SYMBOL PARAMETER CONDITIONS - 61 - MIN. - - 57
TDA8012AM
TYP.
MAX.
UNIT
Automatic gain control (note 12) THAGC automatic gain control threshold as a function of the voltage applied to pin 10 IAGCO = 0.5 mA; V10 = 0.1VCC IAGCO = 0.5 mA; V10 = 0.9VCC note 13 LD level detector shift drift SAGC Vsat(AGC) automatic gain control steepness low level automatic gain control output saturation voltage VCC = 4.75 to 5.25 V Tamb = -10 to +80 C IAGCO = 0.5 mA; note 14 IAGCO = 1 mA - - - - 1 1 8 200 - - - 500 dB dB mA/dB mV Vth(AGC) (pin 10) not connected 53 - - dBV dBV dBV
Keying pulse tkey tW(key) VIL VIH Zi IL(pd) V AFC ---------------f fAFC(shift) input keyed pulse time period keyed pulse width LOW level input keyed pulse voltage HIGH level input keyed pulse voltage input impedance key on key off - 8 - 3.0 1 64 - - - 10 - - 0.8 - - s s V V k
AFC and carrier detector output (note 15) peak detector leakage current automatic frequency control steepness with unmodulated input signal shift of automatic frequency control voltage with respect to fVCO with unmodulated 480 MHz input signal drift of automatic frequency control voltage with respect to fVCO VCC = 5% note 16 50 4.5 - 150 5.5 180 250 6.5 500 nA V/MHz
kHz
fAFC(drift) Notes
Tamb = 80 C; note 17
-
-1.1
-
MHz
1. The DC supply current is measured with VCC = 5 V. 2. The VCO frequency drift is defined as the change in oscillator frequency for a variation of ambient temperature, on the one hand from Tamb = 25 C to Tamb = 0 C and on the other hand from Tamb = 25 C to Tamb = 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 dBV. The maximum allowable input level for the PLL design is 61 dBV. However, for levels different from 57 dBV, the optimum loop filter values will be different from those given for the 57 dBV 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).
1997 May 26
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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 dBV 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. V o(FM) S AM = 20 log --------------V o(AM) FM modulated signal: fc = 480 MHz, frequency deviation = 25 kHz, modulation frequency = 20 kHz, input level = 57 dBV AM modulated signal: fc = 480 MHz, modulation depth = 50%, modulation frequency = 20 kHz, input level = 57 dBV. 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. 1997 May 26 8
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 dBV. 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 = 0.8VCC to 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 (Tamb = 25 C) the TDA8012AM is driven by a 480 MHz 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 Tamb = 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 fVCO 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 fVCO.
handbook, full pagewidth
V19 VCC 1 carrier detect on 0.8 0.6 0.45 0.3 0.15 0 fo 500 kHz
MBH932
AFC DATA
frequency
Fig.3 AFC and carrier detector output.
1997 May 26
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Philips Semiconductors
Product specification
Low power PLL FM demodulator for satellite TV receivers
APPLICATION INFORMATION
TDA8012AM
handbook, full pagewidth
1 F 82 k 2.7 M
1 2
CARRIER DETECTOR VCC 20 AFC 19 4.7 k
AFC/CDO 10 k
22 F 330 nF 3
18 17
330 nF
4 220 pF
KEY
10 nF intermediate frequency input 10 nF
5 6 VCO
16 15
(1)
3.3 pF
14 7 V CC 1 nF 47 F 4.7 k 9 330 10 1 nF 8 STABILIZER 13 AGC 12 8.2 pF 2.7 k 1.5 k +15 V T1(2) T2(2) 330 nF 75 video 15 k 680 470 F -15 V
AGCO Vth(AGC)
TDA8012AM
11 VIDEO BUFFER
MBH933
A
(1) 2.5 turns; diameter 2.0 mm. (2) T1, T2 = BC547B.
Fig.4 Application circuit.
1997 May 26
10
Philips Semiconductors
Product specification
Low power PLL FM demodulator for satellite TV receivers
PACKAGE OUTLINE SSOP20: plastic shrink small outline package; 20 leads; body width 4.4 mm
TDA8012AM
SOT266-1
D
E
A X
c y HE vM A
Z
20
11
Q A2 pin 1 index A1 (A 3) Lp L A
1
e bp
10
detail X wM
0
2.5 scale
5 mm
DIMENSIONS (mm are the original dimensions) UNIT mm A max. 1.5 A1 0.15 0 A2 1.4 1.2 A3 0.25 bp 0.32 0.20 c 0.20 0.13 D (1) 6.6 6.4 E (1) 4.5 4.3 e 0.65 HE 6.6 6.2 L 1.0 Lp 0.75 0.45 Q 0.65 0.45 v 0.2 w 0.13 y 0.1 Z (1) 0.48 0.18 10 0o
o
Note 1. Plastic or metal protrusions of 0.20 mm maximum per side are not included. OUTLINE VERSION SOT266-1 REFERENCES IEC JEDEC EIAJ EUROPEAN PROJECTION
ISSUE DATE 90-04-05 95-02-25
1997 May 26
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Philips Semiconductors
Product specification
Low power PLL FM demodulator for satellite TV receivers
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.
TDA8012AM
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
12
Philips Semiconductors
Product specification
Low power PLL FM demodulator for satellite TV receivers
DEFINITIONS Data sheet status Objective specification Preliminary specification Product specification Limiting values
TDA8012AM
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 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.
1997 May 26
13
Philips Semiconductors
Product specification
Low power PLL FM demodulator for satellite TV receivers
NOTES
TDA8012AM
1997 May 26
14
Philips Semiconductors
Product specification
Low power PLL FM demodulator for satellite TV receivers
NOTES
TDA8012AM
1997 May 26
15
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For all other countries apply to: Philips Semiconductors, Marketing & Sales Communications, Building BE-p, P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands, Fax. +31 40 27 24825 (c) Philips Electronics N.V. 1997
Internet: http://www.semiconductors.philips.com
SCA54
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights.
Printed in The Netherlands
547047/1200/01/pp16
Date of release: 1997 May 26
Document order number:
9397 750 01589

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