TDA8341 [NXP]

Television IF amplifier and demodulator; 电视中频放大器器和解调器


型号：	TDA8341
厂家：	NXP
描述：	Television IF amplifier and demodulator 电视中频放大器器和解调器消费电路商用集成电路接收器集成电路放大器电视光电二极管
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INTEGRATED CIRCUITS

DATA SHEET

TDA8340

TDA8341

Television IF amplifier and

demodulator

November 1987

Product speciﬁcation

File under Integrated Circuits, IC02

Philips Semiconductors

Product speciﬁcation

TDA8340

TDA8341

Television IF ampliﬁer and demodulator

DESCRIPTION

Features

• Full range gain-controlled wide-band IF amplifier

The TDA8340;Q and TDA8341;Q are integrated IF

amplifier and demodulator circuits for colour or black/white

television receivers, the TDA8340;Q is for application with

n-p-n tuners and the TDA8341;Q for p-n-p tuners.

• Linear synchronous demodulator with excellent

intermodulation performance

• White spot inverter

The TDA8340;Q and TDA8341;Q are pin-compatible

successors with improved performance to types

TDA2540/2541;Q and TDA3540/3541;Q.

• Wide-band video amplifier with noise protection

• AFC circuit with AFC on/off switching and

sample-and-hold function

• Low impedance AFC output

• AGC circuit with noise gating

• Tuner AGC output for n-p-n tuners (TDA8340) or p-n-p

tuners (TDA8341)

• External video switch for switching-off the video output

• Reduced sensitivity for high sound carriers

• Integrated filter to limit second harmonic IF signals

• Wide supply voltage range

• Requires few external components

QUICK REFERENCE DATA

PARAMETER

Supply voltage (pin 11)

CONDITIONS

SYMBOL

MIN.

9,4

TYP. MAX.

UNIT

V_CC= V_11-13

I₁₁

13,2

Supply current (pin 11)

IF input sensitivity

(r.m.s. value)

V_1-16(rms)

G_v

µV

IF gain control range

Video output voltage

(peak-to-peak value)

Signal-to-noise ratio

AFC output voltage swing

(peak-to-peak value)

−

white signal;

10% top sync

V_i= 10 mV

V_{12−13(p−p)}

2,4

2,7

3,0

S/(S+N)

−

V_5-13(p-p)

−

PACKAGE OUTLINES

TDA8340; TDA8341:

16-lead DIL; plastic (SOT38); SOT38-1; 1996 november 29.

November 1987

Philips Semiconductors

Product speciﬁcation

TDA8340

TDA8341

Television IF ampliﬁer and demodulator

November 1987

Philips Semiconductors

Product speciﬁcation

TDA8340

TDA8341

Television IF ampliﬁer and demodulator

PINNING

1 and 16

Balanced IF inputs

2 and 15

IF ampliﬁer decoupling

Tuner AGC starting point adjustment

Tuner AGC output

AFC output

AFC on/off switch and sample-and-hold capacitor

Reference carrier π/2 rad. phase shift

IF picture carrier passive regeneration

7 and 10

8 and 9

Positive supply voltage (V_CC

)

Video output

Ground (V_EE

)

IF AGC capacitor and VCR switch

FUNCTIONAL DESCRIPTION

IF ampliﬁer

This is a 3-stage, gain-controlled IF amplifier with a wide dynamic range. On-chip capacitors in the d.c. feedback loop of

the amplifier maintain stability at maximum gain. Internal stabilization of the supply voltage ensures the desired sensitivity

and gain control range over the whole supply voltage range and also gives very good power supply ripple rejection in this

part of the circuit.

Demodulator

The redesigned IF demodulator is a quasi-synchronous circuit that employs passive carrier regeneration and logarithmic

clamping to give improved signal handling. The demodulator input is a.c. coupled to the IF amplifier to reduce d.c. offsets

and thus minimize residual IF carrier in the output signal.

Video ampliﬁer

The linearity and bandwidth of the video amplifier are sufficient to meet all wide band requirements, e.g. for teletext

transmissions. Second harmonics of the IF carrier are effectively reduced by a Sallen-Key low pass interstage filter

between the demodulator output and the video amplifier input. An integrated filter in the noise inverter reduces the

sensitivity of the video amplifier for high sound carriers.

White spot protection comprises a white spot clamp system combined with a delayed-action inverter which is also highly

resistant to high sound carriers.

Note. To prevent radiated video output at the input pins, connect a 6,8 µH inductor in series with pin 12 and fit as close

as possible to the IC body. Use short leads.

AGC detector

A Bessel low-pass filter between the video output and the AGC detector improves the detector function in the presence

of high sound carriers. No ‘hang-up’ occurs in the detector after pin 14 has been short-circuited to ground (VCR switch

operated). The detector also generates the sample-and-hold pulse for the AFC system.

November 1987

Philips Semiconductors

Product speciﬁcation

TDA8340

TDA8341

Television IF ampliﬁer and demodulator

AGC control circuit

This converts the AGC detector voltage (pin 14) into a current signal which controls the gain of the IF amplifier. It also

provides a tuner AGC control output from pin 4, current limiting is incorporated to prevent internal damage. The AGC

starting point is adjusted via pin 3.

AFC circuit

The AFC circuit provides a voltage output which controls the IF frequency of the tuner. Video information on the AFC

output (pin 5) is eliminated by a sample-and-hold circuit (external capacitor at pin 6). Coupling between the AFC and

reference tuned circuits is via two small capacitors (or parasitic capacitance) between the respective tracks of the printed

circuit board. If the capacitance is less than 1 pF, the steepness of the AFC characteristic is reduced.

RATINGS

Limiting values in accordance with the Absolute Maximum System (IEC 134)

PARAMETER

Supply voltage (pin 11)

SYMBOL

V_CC= V₁₁₋₁₃

MIN.

MAX.

UNIT

9,4

−

13,2

IF AGC voltage/VCR switch

Tuner AGC voltage

V_14-13

V_4-13

V_6-13

−

AFC switch voltage

−

13,2

Maximum voltage level with

VCR switch active

V_12-13

I₁₂

−

5,0

DC current at video output

DC current at AFC output

Total power dissipation

Storage temperature range

Operating ambient temperature

−

I₅

−

P_tot

T_stg

T_amb

−

1,2

+150

+70

−55

−25

°C

November 1987

Philips Semiconductors

Product speciﬁcation

TDA8340

TDA8341

Television IF ampliﬁer and demodulator

CHARACTERISTICS

Measured in circuit of Fig.3; V_CC= 12 V; T_amb= 25 °C; unless otherwise speciﬁed

PARAMETER

CONDITIONS

SYMBOL

MIN.

9,4

TYP.

MAX.

UNIT

Supply voltage (pin 11)

Supply current

V_CC= V₁₁₋₁₃

I₁₁

13,2

no input signal

IF ampliﬁer (note 1)

Input sensitivity

at onset of AGC

V₁₋₁₆

R₁₋₁₆

µV

kΩ

Differential input resistance

Differential input

−

capacitance

C₁₋₁₆

G_v

−

Gain control range

Input signal variation

Maximum input signal

−

note 2

V₁₂₋₁₃

V₁₋₁₆

−

0,5

−

100

−

Tuner AGC (note 1)

Tuner AGC starting point

(note 3)

R₃₋₁₁= 39 kΩ

V₁₋₁₆

V_1-16

−

R₃₋₁₃= 39 kΩ

−

Maximum current swing

of tuner AGC output

Input signal variation

I₄

−

note 4;

I₄= 1 to 9 mA

V_1-16

V_4-13

I₄

−

µA

Output saturation voltage

Leakage current

I₄= 7 mA

V₄= 12 V

200

−

300

Video output (note 4)

Zero-signal output level

Top sync output level

Video output voltage

(peak-to-peak value)

Internal bias current

note 5

V_12-13

5,7

2,8

6,0

3,0

6,3

3,2

white signal;

10% top sync

V_12-13(p-p)

2,4

2,7

3,0

of emitter follower

output transistor

1,4

2,2

3,0

Output impedance

Bandwidth of demodulated

output signal

Z₁₂

−

100

−

Ω

−

7,5

−

MHz

Differential gain

note 6

note 7

G_d

ϕ_d

Differential phase

Luminance non-linearity

Residual carrier signal

(r.m.s. value)

deg

note 8

V_12−13(rms)

−

November 1987

Philips Semiconductors

Product speciﬁcation

TDA8340

TDA8341

Television IF ampliﬁer and demodulator

PARAMETER

CONDITIONS

SYMBOL

MIN.

TYP.

MAX.

UNIT

Residual 2nd harmonic

of carrier signal

(r.m.s. value)

note 8

V_12-13(rms)

−

Variation of video voltage for

∆V_CC= 1 V

0,1

0,2

0,3

∆V_{12 – 13 (p – p)}

------------------------------------

∆V

11–13

Intermodulation

notes 8 and 9;

1,1 MHz, blue

1,1 MHz, yellow

3,3 MHz

−

−65

−60

−

−60

−56

−68

Signal-to-noise ratio

note 10;

V_i= 10 mV

max. gain

S/(S+N)

−

Spot inverter (note 11)

Threshold level

V_12-13

6,3

4,2

6,8

4,5

7,3

4,8

Insertion level

Noise inverter (note 11)

Threshold level

Insertion level

V_12-13

1,6

3,5

1,8

3,8

2,0

4,1

VCR switch

Level below which video

output switches off

Switch current

V_14-13

1,8

2,2

2,6

V₁₂₋₁₃= 0,7 V

−I₁₄

100

µA

AFC circuit (note 12)

Output voltage swing

(peak-to-peak value)

Change of frequency for

V_5-13(p-p)

−

an AFC output voltage

swing of 10 V

∆f

−

120

−

kHz

AFC output voltage

at f = 38,9 MHz

no input signal

during AFC off

V_5-13

R_5-13

AFC output resistance

AFC switch:

500

−

Ω

level below which AFC

output switches off

V_6-13

I₆

1,4

2,0

2,8

AFC switch current

during AFC on

−

200

500

µA

Max. AFC switch current

during AFC off;

V₆₋₁₃= 0 V

I₆

−

November 1987

Philips Semiconductors

Product speciﬁcation

TDA8340

TDA8341

Television IF ampliﬁer and demodulator

Notes

1. All input signals are measured r.m.s. at top sync and 38,9 MHz.

2. Measured with 0 dB = 200 µV.

3. Tuner AGC starting point is defined as ‘level of input signal when tuner AGC current = 1 mA’.

4. Measured with pin 3 connected via 39 kΩ resistor to V_CC(pin 11), with an r.m.s. voltage of 10 mV top sync input

signal and with pin 12 not loaded.

5. At the ‘projected zero point’, e.g. with switched demodulator.

6. Measured in the circuit of Fig.7:

the differential gain is expressed as a percentage of the difference in peak amplitudes between the largest and

smallest value relative to the subcarrier amplitude at blanking level;

the differential phase is defined as ‘the difference (in degrees) between the largest and smallest phase angles’.

7. Measured according to the test line shown in Fig.9:

the non-linearity is expressed as a percentage of the maximum deviation of a luminance step from the mean step,

with respect to the mean step;

the mean step is (white level − black level) divided by the number of steps.

8. Measured up to 45 dB gain control.

9. Test set-up and input conditions for intermodulation measurements as in Figs 6 and 7.

V_{out black to white}

10. Measured with a 75 Ω source: S ⁄ (S + N) = 20log

--------------------------------------------------------

V_{n (rms)}at B = 5 MHz

11. Video output waveform showing white spot and noise inverter threshold levels.

12. Measured with input signal V_1-16= 10 mV and with no load at AFC output.

Fig.2 AFC output voltage as a function of frequency.

November 1987

Philips Semiconductors

Product speciﬁcation

TDA8340

TDA8341

Television IF ampliﬁer and demodulator

Fig.3 Typical application circuit diagram; Q of L1 and L2 = 80; f_o= 38,9 MHz.

Fig.4 Video output waveform showing white spot and noise inverter threshold levels.

November 1987

Philips Semiconductors

Product speciﬁcation

TDA8340

TDA8341

Television IF ampliﬁer and demodulator

Fig.5 Signal-to-noise ratio as a function of input voltage.

S.C.: sound carrier level

C.C.: chrominance carrier level ; with respect to top sync level

P.C.: picture carrier level ; with respect to top sync level

; with respect to top sync level

Fig.6 Input conditions for intermodulation measurements; standard colour bar with 75% contrast.

November 1987

Philips Semiconductors

Product speciﬁcation

TDA8340

TDA8341

Television IF ampliﬁer and demodulator

Fig.7 Test set-up for intermodulation measurements.

Fig.8 Video output signal.

November 1987

Philips Semiconductors

Product speciﬁcation

TDA8340

TDA8341

Television IF ampliﬁer and demodulator

Fig.9 E.B.U. test signal waveform (line 330).

November 1987

Philips Semiconductors

Product speciﬁcation

TDA8340

TDA8341

Television IF ampliﬁer and demodulator

PACKAGE OUTLINE

DIP16: plastic dual in-line package; 16 leads (300 mil); long body

SOT38-1

w M

(e )

pin 1 index

10 mm

scale

DIMENSIONS (inch dimensions are derived from the original mm dimensions)

(1)

UNIT

max.

min.

max.

1.40

1.14

0.53

0.38

0.32

0.23

21.8

21.4

6.48

6.20

3.9

3.4

8.25

7.80

9.5

8.3

4.7

0.51

3.7

2.54

0.10

7.62

0.30

0.254

0.01

2.2

0.021

0.015

0.013

0.009

0.86

0.84

0.32

0.31

0.055

0.045

0.26

0.24

0.15

0.13

0.37

0.33

inches

0.19

0.020

0.15

0.087

Note

1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.

REFERENCES

OUTLINE

EUROPEAN

PROJECTION

ISSUE DATE

VERSION

IEC

JEDEC

EIAJ

92-10-02

95-01-19

SOT38-1

050G09

MO-001AE

November 1987

Philips Semiconductors

Product speciﬁcation

TDA8340

TDA8341

Television IF ampliﬁer and demodulator

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).

Soldering by dipping or by wave

The maximum permissible temperature of the solder is 260 °C; solder at this temperature must not be in contact with the

joint for more than 5 seconds. The total contact time of successive solder waves must not exceed 5 seconds.

The device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the

specified maximum storage temperature (T_{stg max}). If the printed-circuit board has been pre-heated, forced cooling may

be necessary immediately after soldering to keep the temperature within the permissible limit.

Repairing soldered joints

Apply a low voltage soldering iron (less than 24 V) to the lead(s) of the package, below the seating plane or not more

than 2 mm above it. If the temperature of the soldering iron bit is less than 300 °C it may remain in contact for up to

10 seconds. If the bit temperature is between 300 and 400 °C, contact may be up to 5 seconds.

DEFINITIONS

Data sheet status

Objective speciﬁcation

Preliminary speciﬁcation

Product speciﬁcation

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

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.

November 1987

TDA8341 [NXP]

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