Philips TDA9800, TDA9615H Datasheet

INTEGRATED CIRCUITS

DATA SH EET

TDA9800

VIF-PLL demodulator and FM-PLL detector

Preliminary speciﬁcation File under Integrated Circuits, IC02

July 1994

Philips Semiconductors Preliminary speciﬁcation

VIF-PLL demodulator and FM-PLL detector TDA9800

FEATURES

• Suitable for negative vision modulation

• Applicable for IF frequencies of 38.9 MHz, 45.75 MHz

and 58.75 MHz

• Gain controlled wide band VIF amplifier (AC coupled)

• True synchronous demodulation with active carrier

regeneration (ultra-linear demodulation, good intermodulation figures, reduced harmonics and

• AGC output voltage for tuner; adjustable take-over point (TOP)

• AFC detector without extra reference circuit

• Alignment-free FM-PLL detector with high linearity

• Stabilizer circuit for ripple rejection and to achieve

constant output signals

• 5 to 8 V positive supply voltage range, low power consumption (300 mW at +5 V supply voltage).

excellent pulse response)

• Peak sync AGC for negative modulation

• Video amplifier to match sound trap and sound filter

GENERAL DESCRIPTION

The TDA9800 is a monolithic integrated circuit for vision and sound IF signal processing in TV and VTR sets.

QUICK REFERENCE DATA

SYMBOL PARAMETER MIN. TYP. MAX. UNIT

i IF

positive supply voltage (pin 20) 4.5 5 8.8 V supply current 51 60 69 mA vision IF input signal sensitivity (RMS value, pins 1 and 2) − 50 90 µV maximum vision IF input signal (RMS value, pins 1 and 2) 70 150 − mV

o CVBS

IF gain control 64 70 73 dB

CVBS output signal on pin 7 (peak-to-peak value) 1.7 2.0 2.3 V B −3 dB video bandwidth on pin 7 6 8 − MHz S/N (W) signal-to-noise ratio weighted; for video 56 59 − dB

0.92/1.1

2.76/3.3

o AF

amb

intermodulation attenuation 56 62 − dB

56 62 − dB suppression of harmonics in video signal 35 40 − dB maximum AF output signal for THD < 1.5% (RMS value, pin 9) 0.8 −− V operating ambient temperature −20 −+70 °C

ORDERING INFORMATION

EXTENDED TYPE

NUMBER

PINS PIN POSITION MATERIAL CODE

TDA9800 20 DIL plastic SOT146

TDA9800T 20 mini-pack plastic SOT163A

Note

1. SOT146-1; 1996 December 6.

2. SOT163-1; 1996 December 6.

July 1994 2

PACKAGE

(1)

(2)

Philips Semiconductors Preliminary speciﬁcation

VIF-PLL demodulator and FM-PLL detector TDA9800

handbook, full pagewidth

VP = 5 V (9 V)

IF input

i PC

i VIF1

i VIF2

GND

CCS

takeover

point

P VCO2 VCO1

INTERNAL

REFERENCE

VOLTAGE

3-STAGE IF-AMPLIFIER

TUNER

AGC

tuner AGC

output

PLL

TRAVELLING

WAVE

DIVIDER

FREQUENCY

DETECTOR

AND PHASE

DETECTOR

DEMODULATOR

VCO

VIDEO

TDA9800

AGC

12 TAGCTOP

19 C

DETECTOR

AGC

MUTE

sound MUTE

8 n.c.

AFC 15

AFC

VIDEO

AMPLIFIER

o(vid)

1 V (p-p)

sound

mute

BUFFER AND

NOISE

CLIPPING

14 V

i(vid)

SOUND

TRAP

AMPLIFIER

FM-PLL

11 V

i IC

SOUND

FILTER

video and intercarrier

o AF

o CVBS

2 V (p-p)

MED329

Fig.1 Block diagram.

July 1994 3

Philips Semiconductors Preliminary speciﬁcation

VIF-PLL demodulator and FM-PLL detector TDA9800

PINNING

SYMBOL PIN DESCRIPTION

i IF

TADJ 3 tuner AGC take-over adjust (TOP) φADJ 4 phase detector adjust MUTE 5 sound mute switch T

PLL

o CVBS

n.c. 8 not connected V

o AF

i IC

TAGC 12 tuner AGC output V

o VID

i VID

AFC 15 automatic frequency control output VCO1 16 VCO reference circuit for 2 f VCO2 17 GND 18 ground (0 V) C

AGC

1 vision IF differential input signal 2

6 PLL time constant of phase detector 7 CVBS (positive) output signal

9 audio frequency output signal 10 decoupling capacitor of audio frequency ampliﬁer 11 sound intercarrier input signal

13 video and sound intercarrier output signal 14 video input signal to buffer ampliﬁer

19 AGC capacitor 20 positive supply voltage

handbook, halfpage

i VIF1

i VIF2

MUTE

o CVBS

TOP CCS

PLL

n.c.

AF AF

1 2 3 4 5 6 7 8 9

TDA9800

Fig.2 Pin configuration.

July 1994 4

MED330

AGC

GND

VCO2

VCO1 AFC

i(vid)

o(vid)

TAGC

i IC

Philips Semiconductors Preliminary speciﬁcation

VIF-PLL demodulator and FM-PLL detector TDA9800

FUNCTIONAL DESCRIPTION Vision IF input

The vision IF amplifier consists of three AC-coupled differential amplifier stages; each stage comprises a controlled feedback network by means of emitter degeneration.

IF and tuner AGC

The automatic control voltage to maintain the video output signal at a constant level is generated according to the transmission standard. Since the TDA9800 is suitable for negative modulation only the peak-sync level is detected. The AGC detector charges and discharges the capacitor on pin 19 to set the IF gain and the tuner gain. The AGC capacitor voltage is transferred to an internal IF control signal, and is fed to the tuner AGC to generate the tuner AGC output current on pin 12 (open-collector output). The tuner AGC voltage take over point is adjusted on pin 3. This allows the tuner and the IF SAW filter to be matched to achieve the optimum IF input level.

Frequency detector, phase detector and video demodulator

The IF amplifier output signal is fed to a frequency detector and to a phase detector. During acquisition the frequency detector produces a DC current which is proportional to the frequency difference between the input and the VCO signal. After frequency lock-in the phase detector produces a DC current proportional to the phase difference between the VCO and the input signal. Via the loop filter the DC current of either frequency detector or phase detector is converted into a DC voltage, which controls the VCO frequency. The video demodulator is a linear multiplier, designed for low distortion and wide bandwidth. The vision IF input signal is multiplied by the in-phase component of the VCO output. The demodulated output signal is fed via an integrated low-pass filter (f amplifier for suppression of the carrier harmonics.

= 12 MHz) to the video

with 90 degree phase difference independent of frequency.

Video ampliﬁer, buffer and noise clipping

The video amplifier is a wide bandwidth operational amplifier with internal feedback. A nominal positive modulated video signal of 1 V (p-p) is present on the composite video output (pin 13). The input impedance of the 7 dB wideband buffer amplifier (with internal feedback) is suitable for ceramic sound trap filters. The CVBS output (pin 7) provides a positive video signal of 2 V (p-p). Noise clipping is provided internally.

Sound demodulation

The FM sound intercarrier signal is fed to pin 11 and through a limiter amplifier before it is demodulated. This achieves high sensitivity and high AM suppression. The limiter amplifier consists of seven internal AC-coupled stages, minimizing the DC offset. The FM-PLL demodulator consists of an RC-oscillator, loop filter and phase detector. The oscillator frequency is locked on the FM intercarrier signal from the limiter amplifier. As a result of this locking, the RC-oscillator is frequency-modulated. The modulating signal voltage (AF signal) is used to control the oscillator frequency. By this, the FM-PLL operates as an FM demodulator. The audio frequency amplifier with internal feedback is designed for high gain and high common mode rejection. The low-level AF signal output from the FM-PLL demodulator is amplified and buffered in a low-ohmic audio signal output stage (pin 9). An external decoupling capacitor on pin 10 removes the DC voltage from the audio amplifier input. By using the sound mute switch (pin 5) the AF amplifier is set to mute state.

VCO and travelling wave divider

The VCO operates with a symmetrically-connected reference LC-circuit, operating at double vision carrier frequency. Frequency control is performed by an internal varicap diode. The voltage to set the VCO frequency to the actual frequency of double vision carrier frequency, is also amplified and converted for the AFC output current. The VCO signal is divided-by-two in a travelling wave divider, which generates two differential output signals

July 1994 5

Philips Semiconductors Preliminary speciﬁcation

VIF-PLL demodulator and FM-PLL detector TDA9800

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC134).

SYMBOL PARAMETER MIN. MAX. UNIT

s max

stg

ESD

Notes

1. Supply current I

2. Equivalent to discharging a 200 pF capacitor through a 0 Ω series resistor (negative and positive voltage).

supply voltage (pin 20) for a maximum chip temperature (note 1)

SOT146 at +120 °C 0 8.8 V SOT163A at +100 °C 0 5.5 V

voltage on pins 1, 2, 7, 11, 13, 14, 15 and 19 0 V

V short-circuit time − 10 s tuner AGC output voltage − 13.2 V storage temperature range −25 +150 °C electrostatic handling for all pins (note 2) −±300 V

= 69 mA at T

amb

= +70 °C.

THERMAL RESISTANCE

SYMBOL PARAMETER THERMAL RESISTANCE

th j-a

from junction to ambient in free air

SOT146 73 K/W SOT163A 85 K/W

July 1994 6

Philips Semiconductors Preliminary speciﬁcation

VIF-PLL demodulator and FM-PLL detector TDA9800

CHARACTERISTICS

The following characteristics apply for V ratios; V

= 10 mV RMS value (sync level); video modulation DSB; residual carrier: 10%; video signal in accordance

ilF

= 5 V; T

with CCIR line 17 or NTC-7 Composite; measurements taken in Fig.3 unless otherwise specified

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

supply voltage (pin 20) note 1 4.5 5 8.8 V

supply current 51 60 69 mA Vision IF input (pins 1 and 2) V

input sensitivity (RMS value) at

38.9 MHz and 45.75 MHz

input sensitivity (RMS value) at

58.75 MHz

maximum input signal (RMS value) at

38.9 MHz and 45.75 MHz

maximum input signal (RMS value) at

58.75 MHz

∆V

o int.

internal IF amplitude difference

between picture and sound carrier

IF gain control see Fig.4

B −3 dB IF bandwidth upper cut-off frequency 70 100 − MHz R

1, 2

input resistance (differential) 1.7 2.2 2.7 kΩ

input capacitance (differential) 1.2 1.7 2.5 pF

DC input voltage 3.0 3.4 3.8 V

True synchronous video demodulator

VCO

maximum oscillator frequency for

carrier regeneration ∆f

VCO

oscillator drift (free running) as a

function of temperature V

o ref

oscillator swing at pins 16 and 17

(RMS value)

∆f

vision carrier capture range

(negative)

vision carrier capture range (positive) 1.5 2 − MHz t

acqu

acquisition time BL = 60 kHz; note 4 −−30 ms

= +25 °C; see Table 1 for input frequencies and picture to sound

amb

−1 dB video at output − 50 90 µV

− 60 100 µV

+1 dB video at output 70 150 − mV

80 160 − mV

within AGC range;

− 0.7 1 dB B/G: ∆f = 5.5 MHz; M/N: ∆f = 4.5 MHz

38.9 MHz and

64 70 − dB

45.75 MHz

58.75 MHz 62 68 − dB

note 2 f=2f

= 0; note 3 −−±20 ppm/K

AFC

125 130 − MHz

fPC= 38.9 MHz − 120 − mV f

= 45.75 MHz − 100 − mV

= 58.75 MHz − 80 − mV

1.5 2 − MHz

July 1994 7

+ 16 hidden pages

Philips TDA9800, TDA9615H Datasheet

Specifications and Main Features

Frequently Asked Questions

User Manual

FEATURES

GENERAL DESCRIPTION

QUICK REFERENCE DATA

ORDERING INFORMATION

PINNING

IF and tuner AGC

Frequency detector, phase detector and video demodulator

Sound demodulation

VCO and travelling wave divider

LIMITING VALUES

THERMAL RESISTANCE

CHARACTERISTICS