Philips TDA9801T, TDA9801 Datasheet

INTEGRATED CIRCUITS

DATA SH EET

TDA9801

Single standard VIF-PLL
demodulator and FM-PLL detector

Product specification
Supersedes data of 1998 May 06
File under Integrated Circuits, IC02

1999 Aug 26

Philips Semiconductors Product specification

Single standard VIF-PLL demodulator
and FM-PLL detector

FEATURES

• Suitable for negative vision modulation

• Applicable for IF frequencies of 38.9, 45.75 and

58.75 MHz

• Gain controlled wide-band Vision Intermediate
Frequency (VIF) amplifier (AC-coupled)

• True synchronous demodulation with active carrier
regeneration (ultra-linear demodulation, good
intermodulation figures, reduced harmonics and
excellent pulse response)

• Peak sync pulse AGC

• Video amplifier to match sound trap and sound filter

• AGC output voltage for tuner with fixed resistor for

takeover point setting

• AFC detector without extra reference circuit

• Alignment-free FM-PLL detector with high linearity

TDA9801

• Stabilizer circuit for ripple rejection and to achieve
constant output signals

• 5 to 9 V positive supply voltage range

• Low power consumption of 300 mW at 5 V supply

voltage.

GENERAL DESCRIPTION

TheTDA9801(T)isamonolithicintegratedcircuitforvision
and sound IF signal processing in TV and VTR sets and
multimedia front-ends.

ORDERING INFORMATION

TYPE NUMBER

NAME DESCRIPTION VERSION

TDA9801 DIP20 plastic dual in-line package; 20 leads (300 mil) SOT146-1
TDA9801T SO20 plastic small outline package; 20 leads; body width 7.5 mm SOT163-1

PACKAGE

1999 Aug 26 2

Philips Semiconductors Product specification

Single standard VIF-PLL demodulator

TDA9801

and FM-PLL detector

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

V

P

I

P

V

i(sens)(VIF)(rms)

V

i(max)(rms)

G

IF

V

o(CVBS)(p-p)

B

v(−3dB)

S/N

W

α

IM(0.92/1.1)

α

IM(2.76/3.3)

α

H(sup)

V

o(AF)(max)(rms)

T

amb

supply voltage note 1 4.5 5.0 9.9 V
supply current VP= 9 V 52 61 70 mA
sensitivity of VIF input signal

(RMS value)
maximum input voltage

(RMS value)

−1 dB video at output;
fPC= 38.9 or 45.75 MHz

+1 dB video at output;
fPC= 38.9 or 45.75 MHz

− 50 90 µV

70 150 − mV

IF gain control fPC= 38.9 or 45.75 MHz 64 70 dB
CVBS output voltage

VP= 5 V 1.7 2.0 2.3 V

(peak-to-peak value)

−3 dB video bandwidth CL< 20 pF; RL>1kΩ 68−MHz
weighted signal-to-noise ratio VP= 5 V; note 2 56 60 − dB
intermodulation attenuation at

for BLUE 56 62 − dB

f = 0.92 or 1.1 MHz
intermodulation attenuation at

for BLUE 56 62 − dB

f = 2.76 or 3.3 MHz
harmonics suppression in video

note 3 35 40 − dB

signal
maximum output AF signal

THD < 1.5% 0.8 −−V

handling voltage (RMS value)
ambient temperature −20 − +70 °C

Notes

1. Values of video and sound parameters can be decreased at V

= 4.5 V.

P

2. S/N is the ratio of the black-to-white amplitude to the black level noise voltage (RMS value) at pin CVBS.
B = 5 MHz weighted in accordance with

3. Measurements taken with SAW filter G1962; VSB modulation; f

“CCIR 567”

at a source impedance of 50 Ω.

> 0.5 MHz; loop bandwidth BL = 60 kHz.

video

1999 Aug 26 3

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TPLL
6

ndbook, full pagewidth

2f

PC

17

16

AFC
15

1999 Aug 26 4

VP = 5 V (9 V)

V

P VCO2 VCO1

20

BLOCK DIAGRAM

Philips Semiconductors Product specification

Single standard VIF-PLL demodulator

and FM-PLL detector

GND

VIF1

VIF2

ADJ

18

1

2

4

takeover

point

INTERNAL

REFERENCE

VOLTAGE

3-STAGE
IF-AMPLIFIER

TUNER

AGC

3

R

TOP

tuner AGC

TRAVELLING

WAVE

DIVIDER

FREQUENCY

DETECTOR

AND PHASE

DETECTOR

VCO

VIDEO

DEMODULATOR

AFC

DETECTOR

VIDEO

AMPLIFIER

TDA9801

sound

mute

IF

AGC

12
TAGCTOP

19

DETECTOR

C

AGC

AGC

5

sound

mute

switch

8
n.c.

BUFFER AMPLIFIER

AND NOISE CLIPPER

13

1 V (p-p)

AMPLIFIER

DETECTOR

AMPLIFIER

14

SOUND

TRAP

AF

FM-PLL

LIMITER

SOUND
FILTER

9

10

7

11
SIVIVSOMUTEAGC

AF
DAF

CVBS

2 V (p-p)

video and
intercarrier

MHA879

C

DAF

TDA9801

Fig.1 Block diagram.

Philips Semiconductors Product specification

Single standard VIF-PLL demodulator
and FM-PLL detector

PINNING

SYMBOL PIN DESCRIPTION

VIF1 1 VIF differential input 1
VIF2 2 VIF differential input 2
TOP 3 tuner AGC TakeOver Point (TOP)

connection
ADJ 4 phase adjust connection
MUTE 5 sound mute switch connection
TPLL 6 PLL time constant connection
CVBS 7 CVBS (positive) video output
n.c. 8 not connected
AF 9 AF output
DAF 10 AF amplifier decoupling capacitor

connection
SI 11 sound intercarrier input
TAGC 12 tuner AGC output
VSO 13 video and sound intercarrier output
VI 14 buffer amplifier video input
AFC 15 AFC output
VCO1 16 VCO1 reference circuit for 2f
VCO2 17 VCO2 reference circuit for 2f
GND 18 ground supply (0 V)
AGC 19 AGC detector capacitor connection
V

P

20 supply voltage (+5 V)

PC
PC

handbook, halfpage

1

VIF1

2

VIF2

3

TOP

4

ADJ

MUTE

5

TDA9801

6

TPLL

7

CVBS

8

n.c.

9

AF

10

DAF

MHA880

Fig.2 Pin configuration.

TDA9801

V

20

P

19

AGC

18

GND

17

VCO2

16

VCO1
AFC

15

VI

14

VSO

13

TAGC

12
11

SI

1999 Aug 26 5

Philips Semiconductors Product specification

Single standard VIF-PLL demodulator
and FM-PLL detector

FUNCTIONAL DESCRIPTION
3-stage IF amplifier

The VIF amplifier consists of three AC-coupled differential
amplifier stages (see Fig.1). Each differential stage
comprises a feedback network controlled by emitter
degeneration.

AGC detector, IF AGC and tuner AGC

The automatic control voltage to maintain the video output
signal at a constant level is generated in accordance with
the transmission standard. Since the TDA9801(T) is
suitable for negative modulation only the peak sync pulse
level is detected.

TheAGCdetectorchargesanddischargescapacitorC
to set the IF amplifier and tuner gain. The voltage on
capacitor C
signal, and is fed to the tuner AGC to generate the tuner
AGC output current on pin TAGC (open-collector output).
The tuner AGC takeover point level is set at pin TOP. This
allows the tuner to be matched to the SAW filter in order to
achieve the optimum IF input level.

is transferred to an internal IF control

AGC

AGC

TDA9801

The voltage to set the VCO frequency to the actual double
vision carrier frequency isalso amplified and converted for
the AFC output current.

The VCO signal is divided-by-2 with a Travelling Wave
Divider (TWD) which generates two differential output
signals with a 90 degree phase difference independent of
the frequency.

Video amplifier

The composite video amplifier is a wide bandwidth
operational amplifier with internal feedback. A nominal
positive video signal of 1 V (p-p) is present at pin VSO.

Buffer amplifier and noise clipper

The input impedance of the 7 dB wideband CVBS buffer
amplifier (with internal feedback) is suitable for ceramic
sound trap filters. Pin CVBS provides a positive video
signal of 2 V (p-p). Noise clipping is provided internally.

Sound demodulation

LIMITER AMPLIFIER

Frequency detector and phase detector

The VIF amplifier output signal is fed into a frequency
detector and into a phase detector. During acquisition the
frequency detector produces a DC current 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. The DC
current of either frequency detector or phase detector is
converted into a DC voltage via the loop filter which
controls the VCO frequency.

Video demodulator

The true synchronous video demodulator is realized by a
linear multiplier which is designed for low distortion and
widebandwidth.ThevisionIFinputsignalis multiplied with
the ‘in phase’ component of the VCO output.
The demodulator output signal is fed via an integrated
low-pass filter (fg= 12 MHz) for suppression of the carrier
harmonics to the video amplifier.

VCO, AFC detector and travelling wave divider

The VCO operates with a symmetrically connected
reference LC circuit, operating at the double vision carrier
frequency. Frequency control is performed by an internal
variable capacitor diode.

The FM sound intercarrier signal is fed to pin SI and
through a limiter amplifier before it is demodulated.
The result is high sensitivity and AM suppression.
The limiter amplifier consists of 7 stages which are
internally AC-coupled in order to minimizing the DC offset.

FM-PLL DETECTOR
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 voltage (AF signal)
is used to control the oscillator frequency. By this, the
FM-PLL operates as an FM demodulator.

AF AMPLIFIER
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
audiooutput stage. An external decouplingcapacitor C
removes the DC voltage from the audio amplifier input.

By using the sound mute switch (pin MUTE) the AF
amplifier is set in the mute state.

DAF

1999 Aug 26 6

Philips Semiconductors Product specification

Single standard VIF-PLL demodulator

TDA9801

and FM-PLL detector

LIMITING VALUES

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

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

V

P

V

n

t

sc(max)

T

stg

T

amb

V

es

Notes

1. Machine model class B (L = 2.5 µH).

supply voltage IP= 70 mA; T

amb

=70°C;

maximum chip temperature

125 °C for TDA9801 0 9.9 V
128 °C for TDA9801T 0 9.9 V

voltage on

pins VIF1, VIF2, AFC and AGC 0 V

P

V

pin TAGC − 13.2 V

maximum short-circuit time to ground or V

P

− 10 s
storage temperature −25 +150 °C
ambient temperature −20 +70 °C
electrostatic handling voltage note 1 −300 +300 V

THERMAL CHARACTERISTICS

SYMBOL PARAMETER CONDITIONS VALUE UNIT

R

th(j-a)

thermal resistance from junction to ambient in free air

TDA9801 73 K/W
TDA9801T 85 K/W

CHARACTERISTICS

VP=5V; T

=25°C; see Table 1 for input frequencies and picture-to-sound carrier ratios; V

amb

i(VIF)(rms)

= 10 mV (sync
pulse level); IF input from 50 Ω via broadband transformer 1 : 1; DSB video modulation; 10% residual carrier; video
signal in accordance with

“CCIR, line 17”

or

“NTC-7 Composite”

; measurements taken in test circuit of Fig.12; unless

otherwise specified.

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supply: pin V

V

P

I

P

P

supply voltage note 1 4.5 5.0 9.9 V
supply current VP= 5 V 51 60 70 mA

V

= 9 V 52 61 70 mA

P

Vision IF input: pins VIF1 and VIF2

V

i(sens)(VIF)(rms)

V

i(max)(rms)

V

I

sensitivity of VIF input
voltage (RMS value)

maximum VIF input voltage
(RMS value)

−1 dB video at output
= 38.9 or 45.75 MHz − 50 90 µV

f

PC

f

= 58.75 MHz − 60 100 µV

PC

1 dB video at output

f

= 38.9 or 45.75 MHz 70 150 − mV

PC

f

= 58.75 MHz 80 160 − mV

PC

DC input voltage 3.0 3.4 3.8 V

1999 Aug 26 7

Philips Semiconductors Product specification

Single standard VIF-PLL demodulator

TDA9801

and FM-PLL detector

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

∆V

int

G

IF

B

IF(−3dB)

R

i(dif)

C

i(dif)

VCO and video demodulator; note 3
f

VCO(max)

/∆T VCO frequency variation

∆f

VCO

V

VCO(rms)

f

cr(PC)

t

acq

V

i(sens)(VIF)(rms)

I

offset(TPLL)

Video amplifier output (sound carrier off): pin VSO

V

o(VSO)(p-p)

V

sync

V

v(clu)

V

v(cll)

V

o(intc)(rms)

R

o

I

bias

internal IF amplitude

within AGC range − 0.7 1 dB
difference between picture
and sound carrier

IF gain control see Fig.6

= 38.9 or 45.75 MHz 64 70 − dB

f

PC

f

= 58.75 MHz 62 68 − dB

PC

−3 dB IF bandwidth upper limit cut-off

70 100 − MHz

frequency
differential input resistance note 2 1.7 2.2 2.7 kΩ
differential input

note 2 1.2 1.7 2.5 pF
capacitance

maximum VCO frequency for carrier regeneration;

f=2f

PC

with temperature
VCO voltage swing

(RMS value)

picture carrier capture
frequency range

free running; I

note 4

measured between

pins VCO1 and VCO2

= 38.9 MHz − 120 − mV

f

PC

f

= 45.75 MHz − 100 − mV

PC

f

= 58.75 MHz − 80 − mV

PC

negative 1.4 1.8 − MHz

positive 1.4 1.8 − MHz

AFC

=0;

125 130 − MHz

−−±20 × 10−6K

acquisition time BL = 60 kHz; note 5 −−30 ms
sensitivity of VIF input

(RMS value)

PLL still locked;

maximum IF gain; note 6

− 50 90 µV

C/N = 10 dB; note 7 − 100 140 µV
offset current at pin TPLL note 8 −−±2.0 µA

VSO output voltage
(peak-to-peak value)

see Fig.5

V

= 5 V 0.90 1.0 1.25 V

P

V

= 9 V 0.95 1.1 1.25 V

P

sync pulse voltage level 1.35 1.5 1.6 V
upper video clipping

VP− 1.1 VP− 1 − V

voltage level
lowervideo clipping voltage

− 0.7 0.9 V

level
intercarrier output voltage

sound carrier on; note 9 − 32 − mV
(RMS value)

output resistance note 2 −−10 Ω
DC bias current for internal emitter-follower

1.8 2.5 − mA

at pin VSO

−1

1999 Aug 26 8

Philips Semiconductors Product specification

Single standard VIF-PLL demodulator

TDA9801

and FM-PLL detector

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

I

o(sink)(max)

I

o(source)(max)

B

v(−3dB)

α

H(sup)

PSRR

VSO

Buffer amplifier and noise clipper input: pin VI

R

i

C

i

V

I

Buffer amplifier output: pin CVBS

G

v

B

v(−3dB)

V

o(v)(p-p)

V

v(clu)

V

v(cll)

V

sync

R

o

I

bias

I

o(sink)(max)

I

o(source)(max)

Measurements from VIF inputs to CVBS output (330 Ω connected between pins VSO and VI, sound carrier off)

V

o(CVBS)(p-p)

∆V

o(CVBS)

∆V

o(bl)

G

dif

ϕ

dif

B

v(−3dB)

maximum AC and DC

1.4 −− mA

output sink current
maximum AC and DC

2.0 −− mA

output source current

−3 dB video bandwidth CL< 50 pF; RL>1kΩ 710− MHz
harmonics suppression in

video signal
power supply ripple

CL< 50 pF; RL>1kΩ;

35 40 − dB

note 10

see Fig.7 32 35 − dB
rejection at pin VSO

input resistance 2.6 3.3 4.0 kΩ
input capacitance 1.4 2 3.0 pF
DC input voltage pin VI not connected 1.5 1.8 2.1 V

voltage gain note 11 6 7 7.5 dB

−3 dB video bandwidth CL< 20 pF; RL>1kΩ 811− MHz
video output voltage

(peak-to-peak value)
upper video clipping

sound carrier off;

see Fig.12

1.7 2.0 2.3 V

3.9 4.0 − V

voltage level
lowervideo clipping voltage

− 1.0 1.1 V

level
sync pulse voltage level − 1.35 − V
output resistance −−10 Ω
DC bias current internal emitter-follower at

1.8 2.5 − mA

pin CVBS
maximum AC and DC

1.4 −− mA

output sink current
maximum AC and DC

2.4 −− mA

output source current

CVBS output voltage
(peak-to-peak value)

deviation of CVBS output
voltage

VP= 5 V 1.7 2.0 2.3 V

= 9 V 1.8 2.2 2.6 V

V

P

at B/G standard

50 dB gain control −−0.5 dB

30 dB gain control −−0.1 dB
black level tilt gain variation; note 12 −−1%
differential gain

“CCIR, line 330”

or

− 25 %

“NTC-7 Composite”

differential phase

“CCIR, line 330”

or

− 2 4 deg

“NTC-7 Composite”

−3 dB video bandwidth CL< 20 pF; RL>1kΩ 68− MHz

1999 Aug 26 9

Philips Semiconductors Product specification

Single standard VIF-PLL demodulator

TDA9801

and FM-PLL detector

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

S/N

W

α

IM(0.92/1.1)

α

IM(2.76/3.3)

∆V

r(PC)(rms)

α

H(sup)

PSRR

CVBS

AGC detector output: pin AGC

t

res

I

ch

I

dch

V

o

Tuner AGC

V

i(VIF)(rms)

QV

i(VIF)(rms)

/∆T variation of tuner takeover

∆V

i(VIF)

∆G

IF

weighted signal-to-noise
ratio

intermodulation attenuation
at f = 0.92 or 1.1 MHz

see Fig.3; note 13

V

=5V 56 60 − dB

P

V

=9V 55 59 − dB

P

see Fig.4; note 14

for BLUE 56 62 − dB

for YELLOW 58 64 − dB
intermodulation attenuation

at f = 2.76 or 3.3 MHz

see Fig.4; note 14

for BLUE 56 62 − dB

for YELLOW 57 63 − dB
residual picture carrier

(RMS value)
harmonics suppression in

fundamental wave − 110 mV
harmonics − 110 mV
note 10 35 40 − dB

video signal
power supply ripple

see Fig.7 25 28 − dB

rejection at pin CVBS

response time at 50 dB amplitude step of

input signal

for increasing step − 110 ms

for decreasing step − 50 100 ms
charging current note 12 0.82 1.1 1.38 mA
discharging current 16 22 28 µA
gain control output voltage see Fig.6

maximum gain 0 −− V

VIF input voltage
(RMS value)

accuracy level of tuner
takeover point (RMS value)

minimum gain −−V

for onset tuner takeover
point

minimum level with

R

=22kΩ

TOP

maximum level with

=0Ω

R

TOP

R

=13kΩ;

TOP

I

= 0.4 mA

TAGC

I

= 0.4 mA − 0.02 0.06 dB/K

TAGC

−−5mV

50 −− mV

7 − 14 mV

−0.7 V

P

point with temperature
IF slip by automatic gain

control

tuner gain current from
20 to 80%

− 68 dB

1999 Aug 26 10