Philips TDA9801T, TDA9801 Datasheet

DATA SH EET

Product specification

Supersedes data of 1998 May 06

File under Integrated Circuits, IC02

1999 Aug 26

INTEGRATED CIRCUITS

TDA9801

Single standard VIF-PLL

demodulator and FM-PLL detector

1999 Aug 26 2

Philips Semiconductors Product specification

Single standard VIF-PLL demodulator

and FM-PLL detector

TDA9801

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

• 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

PACKAGE

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

1999 Aug 26 3

Philips Semiconductors Product specification

Single standard VIF-PLL demodulator

and FM-PLL detector

TDA9801

QUICK REFERENCE DATA

Notes

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

P

= 4.5 V.

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

“CCIR 567”

at a source impedance of 50 Ω.

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

video

> 0.5 MHz; loop bandwidth BL = 60 kHz.

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

V

P

supply voltage note 1 4.5 5.0 9.9 V

I

P

supply current V

P

= 9 V 52 61 70 mA

V

i(sens)(VIF)(rms)

sensitivity of VIF input signal

(RMS value)

−1 dB video at output;

f

PC

= 38.9 or 45.75 MHz

− 50 90 µV

V

i(max)(rms)

maximum input voltage

(RMS value)

+1 dB video at output;

f

PC

= 38.9 or 45.75 MHz

70 150 − mV

G

IF

IF gain control f

PC

= 38.9 or 45.75 MHz 64 70 dB

V

o(CVBS)(p-p)

CVBS output voltage

(peak-to-peak value)

V

P

= 5 V 1.7 2.0 2.3 V

B

v(−3dB)

−3 dB video bandwidth C

L

< 20 pF; R

L

>1kΩ 68−MHz

S/N

W

weighted signal-to-noise ratio V

P

= 5 V; note 2 56 60 − dB

α

IM(0.92/1.1)

intermodulation attenuation at

f = 0.92 or 1.1 MHz

for BLUE 56 62 − dB

α

IM(2.76/3.3)

intermodulation attenuation at

f = 2.76 or 3.3 MHz

for BLUE 56 62 − dB

α

H(sup)

harmonics suppression in video

signal

note 3 35 40 − dB

V

o(AF)(max)(rms)

maximum output AF signal

handling voltage (RMS value)

THD < 1.5% 0.8 −−V

T

amb

ambient temperature −20 − +70 °C

1999 Aug 26 4

Philips Semiconductors Product specification

Single standard VIF-PLL demodulator

and FM-PLL detector

TDA9801

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BLOCK DIAGRAM

a

ndbook, full pagewidth

V

P

= 5 V (9 V)

18

1

2

20

16

17

INTERNAL

REFERENCE

VOLTAGE

TRAVELLING

WAVE

DIVIDER

AFC

DETECTOR

AGC

DETECTOR

VCO

3-STAGE

IF-AMPLIFIER

FREQUENCY

DETECTOR

AND PHASE

DETECTOR

9

10

15

7

IF

AGC

12

TUNER

AGC

tuner AGC

takeover

point

TDA9801

VIDEO

DEMODULATOR

VIDEO

AMPLIFIER

19

3

14

11

13

8

BUFFER AMPLIFIER

AND NOISE CLIPPER

FM-PLL

DETECTOR

LIMITER

AMPLIFIER

AF

AMPLIFIER

1 V (p-p)

4

5

6

sound

mute

switch

SOUND

TRAP

SOUND

FILTER

sound

mute

video and

intercarrier

n.c.

MHA879

TPLL

2f

PC

V

P VCO2 VCO1

AFC

AF

DAF

C

DAF

CVBS

2 V (p-p)

SIVIVSOMUTEAGC

C

AGC

TAGCTOP

R

TOP

ADJ

VIF2

VIF1

GND

Fig.1 Block diagram.

1999 Aug 26 5

Philips Semiconductors Product specification

Single standard VIF-PLL demodulator

and FM-PLL detector

TDA9801

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

PC

VCO2 17 VCO2 reference circuit for 2f

PC

GND 18 ground supply (0 V)

AGC 19 AGC detector capacitor connection

V

P

20 supply voltage (+5 V)

Fig.2 Pin configuration.

handbook, halfpage

VIF1

VIF2

TOP

ADJ

MUTE

TPLL

CVBS

n.c.

AF

DAF

V

P

AGC

GND

VCO2

AFC

VI

VCO1

VSO

TAGC

SI

1

2

3

4

5

6

7

8

9

10

11

12

20

19

18

17

16

15

14

13

TDA9801

MHA880

1999 Aug 26 6

Philips Semiconductors Product specification

Single standard VIF-PLL demodulator

and FM-PLL detector

TDA9801

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

AGC

to set the IF amplifier and tuner gain. The voltage on

capacitor C

AGC

is transferred to an internal IF control

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.

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 (f

g

= 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 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

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

DAF

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.

1999 Aug 26 7

Philips Semiconductors Product specification

Single standard VIF-PLL demodulator

and FM-PLL detector

TDA9801

LIMITING VALUES

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

Notes

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

THERMAL CHARACTERISTICS

CHARACTERISTICS

V

P

=5V; T

amb

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

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. MAX. UNIT

V

P

supply voltage I

P

= 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

V

n

voltage on

pins VIF1, VIF2, AFC and AGC 0 V

P

V

pin TAGC − 13.2 V

t

sc(max)

maximum short-circuit time to ground or V

P

− 10 s

T

stg

storage temperature −25 +150 °C

T

amb

ambient temperature −20 +70 °C

V

es

electrostatic handling voltage note 1 −300 +300 V

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

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supply: pin V

P

V

P

supply voltage note 1 4.5 5.0 9.9 V

I

P

supply current V

P

= 5 V 51 60 70 mA

V

P

= 9 V 52 61 70 mA

Vision IF input: pins VIF1 and VIF2

V

i(sens)(VIF)(rms)

sensitivity of VIF input

voltage (RMS value)

−1 dB video at output

f

PC

= 38.9 or 45.75 MHz − 50 90 µV

f

PC

= 58.75 MHz − 60 100 µV

V

i(max)(rms)

maximum VIF input voltage

(RMS value)

1 dB video at output

f

PC

= 38.9 or 45.75 MHz 70 150 − mV

f

PC

= 58.75 MHz 80 160 − mV

V

I

DC input voltage 3.0 3.4 3.8 V

1999 Aug 26 8

Philips Semiconductors Product specification

Single standard VIF-PLL demodulator

and FM-PLL detector

TDA9801

∆V

int

internal IF amplitude

difference between picture

and sound carrier

within AGC range − 0.7 1 dB

G

IF

IF gain control see Fig.6

f

PC

= 38.9 or 45.75 MHz 64 70 − dB

f

PC

= 58.75 MHz 62 68 − dB

B

IF(−3dB)

−3 dB IF bandwidth upper limit cut-off

frequency

70 100 − MHz

R

i(dif)

differential input resistance note 2 1.7 2.2 2.7 kΩ

C

i(dif)

differential input

capacitance

note 2 1.2 1.7 2.5 pF

VCO and video demodulator; note 3

f

VCO(max)

maximum VCO frequency for carrier regeneration;

f=2f

PC

125 130 − MHz

∆f

VCO

/∆T VCO frequency variation

with temperature

free running; I

AFC

=0;

note 4

−−±20 × 10

−6

K

−1

V

VCO(rms)

VCO voltage swing

(RMS value)

measured between

pins VCO1 and VCO2

f

PC

= 38.9 MHz − 120 − mV

f

PC

= 45.75 MHz − 100 − mV

f

PC

= 58.75 MHz − 80 − mV

f

cr(PC)

picture carrier capture

frequency range

negative 1.4 1.8 − MHz

positive 1.4 1.8 − MHz

t

acq

acquisition time BL = 60 kHz; note 5 −−30 ms

V

i(sens)(VIF)(rms)

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

I

offset(TPLL)

offset current at pin TPLL note 8 −−±2.0 µA

Video amplifier output (sound carrier off): pin VSO

V

o(VSO)(p-p)

VSO output voltage

(peak-to-peak value)

see Fig.5

V

P

= 5 V 0.90 1.0 1.25 V

V

P

= 9 V 0.95 1.1 1.25 V

V

sync

sync pulse voltage level 1.35 1.5 1.6 V

V

v(clu)

upper video clipping

voltage level

V

P

− 1.1 V

P

− 1 − V

V

v(cll)

lowervideo clipping voltage

level

− 0.7 0.9 V

V

o(intc)(rms)

intercarrier output voltage

(RMS value)

sound carrier on; note 9 − 32 − mV

R

o

output resistance note 2 −−10 Ω

I

bias

DC bias current for internal emitter-follower

at pin VSO

1.8 2.5 − mA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

1999 Aug 26 9

Philips Semiconductors Product specification

Single standard VIF-PLL demodulator

and FM-PLL detector

TDA9801

I

o(sink)(max)

maximum AC and DC

output sink current

1.4 −− mA

I

o(source)(max)

maximum AC and DC

output source current

2.0 −− mA

B

v(−3dB)

−3 dB video bandwidth C

L

< 50 pF; R

L

>1kΩ 710− MHz

α

H(sup)

harmonics suppression in

video signal

C

L

< 50 pF; R

L

>1kΩ;

note 10

35 40 − dB

PSRR

VSO

power supply ripple

rejection at pin VSO

see Fig.7 32 35 − dB

Buffer amplifier and noise clipper input: pin VI

R

i

input resistance 2.6 3.3 4.0 kΩ

C

i

input capacitance 1.4 2 3.0 pF

V

I

DC input voltage pin VI not connected 1.5 1.8 2.1 V

Buffer amplifier output: pin CVBS

G

v

voltage gain note 11 6 7 7.5 dB

B

v(−3dB)

−3 dB video bandwidth C

L

< 20 pF; R

L

>1kΩ 811− MHz

V

o(v)(p-p)

video output voltage

(peak-to-peak value)

sound carrier off;

see Fig.12

1.7 2.0 2.3 V

V

v(clu)

upper video clipping

voltage level

3.9 4.0 − V

V

v(cll)

lowervideo clipping voltage

level

− 1.0 1.1 V

V

sync

sync pulse voltage level − 1.35 − V

R

o

output resistance −−10 Ω

I

bias

DC bias current internal emitter-follower at

pin CVBS

1.8 2.5 − mA

I

o(sink)(max)

maximum AC and DC

output sink current

1.4 −− mA

I

o(source)(max)

maximum AC and DC

output source current

2.4 −− mA

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

V

o(CVBS)(p-p)

CVBS output voltage

(peak-to-peak value)

V

P

= 5 V 1.7 2.0 2.3 V

V

P

= 9 V 1.8 2.2 2.6 V

∆V

o(CVBS)

deviation of CVBS output

voltage

at B/G standard

50 dB gain control −−0.5 dB

30 dB gain control −−0.1 dB

∆V

o(bl)

black level tilt gain variation; note 12 −−1%

G

dif

differential gain

“CCIR, line 330”

or

“NTC-7 Composite”

− 25 %

ϕ

dif

differential phase

“CCIR, line 330”

or

“NTC-7 Composite”

− 2 4 deg

B

v(−3dB)

−3 dB video bandwidth C

L

< 20 pF; R

L

>1kΩ 68− MHz

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

1999 Aug 26 10

Philips Semiconductors Product specification

Single standard VIF-PLL demodulator

and FM-PLL detector

TDA9801

S/N

W

weighted signal-to-noise

ratio

see Fig.3; note 13

V

P

=5V 56 60 − dB

V

P

=9V 55 59 − dB

α

IM(0.92/1.1)

intermodulation attenuation

at f = 0.92 or 1.1 MHz

see Fig.4; note 14

for BLUE 56 62 − dB

for YELLOW 58 64 − dB

α

IM(2.76/3.3)

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

∆V

r(PC)(rms)

residual picture carrier

(RMS value)

fundamental wave − 110 mV

harmonics − 110 mV

α

H(sup)

harmonics suppression in

video signal

note 10 35 40 − dB

PSRR

CVBS

power supply ripple

rejection at pin CVBS

see Fig.7 25 28 − dB

AGC detector output: pin AGC

t

res

response time at 50 dB amplitude step of

input signal

for increasing step − 110 ms

for decreasing step − 50 100 ms

I

ch

charging current note 12 0.82 1.1 1.38 mA

I

dch

discharging current 16 22 28 µA

V

o

gain control output voltage see Fig.6

maximum gain 0 −− V

minimum gain −−V

P

−0.7 V

Tuner AGC

V

i(VIF)(rms)

VIF input voltage

(RMS value)

for onset tuner takeover

point

minimum level with

R

TOP

=22kΩ

−−5mV

maximum level with

R

TOP

=0Ω

50 −− mV

QV

i(VIF)(rms)

accuracy level of tuner

takeover point (RMS value)

R

TOP

=13kΩ;

I

TAGC

= 0.4 mA

7 − 14 mV

∆V

i(VIF)

/∆T variation of tuner takeover

point with temperature

I

TAGC

= 0.4 mA − 0.02 0.06 dB/K

∆G

IF

IF slip by automatic gain

control

tuner gain current from

20 to 80%

− 68 dB

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT