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Philips Semiconductors
Product specification
Baseband delay line
FEATURES * Two comb filters, using the switched-capacitor technique, for one line delay time (64 s) * Adjustment-free application * No crosstalk between SECAM colour carriers (diaphoty) * Handles negative or positive colour-difference input signals * Clamping of AC-coupled input signals ((R-Y) and (B-Y)) * VCO without external components * 3 MHz internal clock signal derived from a 6 MHz CCO, line-locked by the sandcastle pulse (64 s line) * Sample-and-hold circuits and low-pass filters to suppress the 3 MHz clock signal * Addition of delayed and non-delayed output signals * Output buffer amplifiers * Comb filtering functions for NTSC colour-difference signals to suppress cross-colour. QUICK REFERENCE DATA SYMBOL VP1 VP2 IP(tot) VI PARAMETER analog supply voltage (pin 9) digital supply voltage (pin 1) total supply current MIN. 4.5 4.5 - 5 5 4.9 525 665 1.05 1.33 5.8 5.8 -0.1 -0.1 TYP. 6 6 GENERAL DESCRIPTION
TDA4661
The TDA4661 is an integrated baseband delay line circuit with one line delay. It is suitable for decoders with colour-difference signal outputs (R-Y) and (B-Y).
MAX. V V
UNIT
7.0 - - - - 6.3 6.3 +0.4 +0.4
mA mV mV V V dB dB dB dB
(R-Y) input signal PAL/NTSC (peak-to-peak value; pin 16) - (B-Y) input signal PAL/NTSC (peak-to-peak value; pin 14) - (R-Y) input signal SECAM (peak-to-peak value; pin 16) (B-Y) input signal SECAM (peak-to-peak value; pin 14) - - 5.3 5.3 -0.6 -0.6
Gv
gain VO / VI of colour-difference output signals V11 / V16 for PAL and NTSC V12 / V14 for PAL and NTSC V11 / V16 for SECAM V12 / V14 for SECAM
ORDERING INFORMATION TYPE NUMBER TDA4661 TDA4661T PACKAGE NAME DIP16 SO16 DESCRIPTION plastic dual in-line package; 16 leads (300 mil) long body plastic small outline package; 16 leads; body width 3.9 mm VERSION SOT38-4 SOT109-1
December 1994
2
December 1994
BLOCK DIAGRAM
Philips Semiconductors
Baseband delay line
(R-Y) 11 (R-Y) LP LINE MEMORY pre-amplifiers addition stages output buffers colour- difference output signals SAMPLEANDHOLD
16
SIGNAL CLAMPING
colour-difference input signals
(B-Y) 12 LINE MEMORY LP SAMPLEANDHOLD
14
SIGNAL CLAMPING
(B-Y)
3
3 MHz shifting clock FREQUENCY PHASE DETECTOR DIVIDER BY 192
V P1
9
analog supply
n.c. n.c. n.c. n.c.
TDA4661
5
sandcastle pulse input LP digital supply 1 6 MHz CCO
SANDCASTLE DETECTOR
2 6 13 15
DIVIDER BY 2 3 4, 8 GND2
7
i.c.
10
GND1 VP2
MEH182.2
Product specification
TDA4661
Fig.1 Block diagram.
Philips Semiconductors
Product specification
Baseband delay line
PINNING SYMBOL VP2 n.c. GND2 i.c. SAND n.c. i.c. i.c. VP1 GND1 VO(R-Y) VO(B-Y) n.c. VI(B-Y) n.c. VI(R-Y) PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 DESCRIPTION +5 V supply voltage for digital part not connected ground for digital part (0 V) internally connected sandcastle pulse input not connected internally connected internally connected +5 V supply voltage for analog part ground for analog part (0 V) (R-Y) output signal (B-Y) output signal not connected (B-Y) input signal not connected (R-Y) input signal Fig.2 Pin configuration.
i.c. i.c. 7 8 10 9 SAND n.c. 5 6 n.c. GND2 i.c. 2 3 4 15 14 13 V P2 1
MEH183
TDA4661
16
V I(R-Y) n.c. VI(B-Y) n.c. VO(B-Y) VO(R-Y) GND1 VP1
TDA4661
12 11
LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). Ground pins 3 and 10 connected together. SYMBOL VP1 VP2 V5 Vn Tstg Tamb VESD Note 1. Equivalent to discharging a 200 pF capacitor through a 0 series resistor. THERMAL CHARACTERISTICS SYMBOL Rthj-a SOT38-4 SOT109-1 PARAMETER thermal resistance from junction to ambient in free air 75 220 K/W K/W VALUE UNIT supply voltage (pin 9) supply voltage (pin 1) voltage on pin 5 voltage on pins 11, 12, 14 and 16 storage temperature operating ambient temperature electrostatic handling for all pins (note 1) PARAMETER MIN. -0.5 -0.5 -0.5 -0.5 -25 0 - MAX. +7 +7 VP + 1.0 VP +150 70 500 V V V V C C V UNIT
December 1994
4
Philips Semiconductors
Product specification
Baseband delay line
TDA4661
CHARACTERISTICS VP = 5.0 V; input signals as specified in characteristics with 75% colour bars; super-sandcastle frequency of 15.625 kHz; Tamb = +25 C; measurements taken in Fig.3 unless otherwise specified. SYMBOL VP1 VP2 IP1 IP2 VI PARAMETER supply voltage (analog part; pin 9) supply voltage (digital part; pin 1) supply current supply current CONDITIONS MIN. 4.5 4.5 - - 5 5 4.2 0.7 TYP. 6 6 6.0 1.0 MAX. UNIT V V mA mA
Colour-difference input signals input signal (peak-to-peak value) (R-Y) PAL and NTSC (pin 16) (B-Y) PAL and NTSC (pin 14) (R-Y) SECAM (pin 16) (B-Y) SECAM (pin 14) VI(max) maximum symmetrical input signal (peak-to-peak value) (R-Y) or (B-Y) for PAL and NTSC (R-Y) or (B-Y) for SECAM R14, 16 C14, 16 V14, 16 VO input resistance input capacitance input clamping voltage proportional to VP before clipping before clipping 1 2 - - 1.3 - - - - 1.5 - - 40 10 1.7 V V k pF V note 1 note 1 - - - - 525 665 1.05 1.33 - - - - mV mV V V
Colour-difference output signals output signal (peak-to-peak value) (R-Y) on pin 11 (B-Y) on pin 12 V11/V12 V11, 12 R11, 12 Gv Vn/Vn+1 ratio of output amplitudes at equal input signals DC output voltage output resistance gain for PAL and NTSC gain for SECAM ratio of output signals on pins 11 and 12 for adjacent time samples at constant input signals noise voltage (RMS value; pins 11 and 12) weighted signal-to-noise ratio delay of delayed signals delay of non-delayed signals ttr transient time of delayed signal on pins 11 respectively 12 transient time of non-delayed signal on pins 11 respectively 12 December 1994 300 ns transient of SECAM signal 300 ns transient of SECAM signal 5 ratio VO/VI ratio VO/VI VI14, 16 = 1.33 V (p-p); SECAM signals VI14, 16 = 0 V; note 2 VO = 1 V (p-p); note 2 all standards all standards VI14, 16 = 1.33 V (p-p) proportional to VP - - -0.4 2.5 - 5.3 -0.6 -0.1 1.05 1.33 0 2.9 330 5.8 -0.1 0 - - +0.4 3.3 400 6.3 +0.4 +0.1 V V dB V dB dB dB
Vn S/N(W) td
- - 63.94 40 - -
- 54 64.0 60 350 320
1.2 - 64.06 80 - -
mV dB s ns ns ns
Philips Semiconductors
Product specification
Baseband delay line
TDA4661
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Sandcastle pulse input (pin 5) fBK fSAND V5 Vslice I5 C5 Notes 1. The signal must be blanked line-sequentially. The blanking level must be equal to the non-colour signal. 2. Noise voltage at f = 10 kHz to 1 MHz; VI14, 16 = 0 (RS < 300 ). 3. The leading edge of the burst-key pulse or H-blanking pulse is used for timing. burst-key frequency sandcastle frequency top pulse voltage internal slicing level input current input capacitance note 3 14.2 14.2 4.0 - - 15.625 15.625 - - - 17.0 17.0 kHz kHz
VP + 1.0 V V5 - 0.5 V 10 10 A pF
V5 - 1.0 -
December 1994
6
470 10 H Coil: Toko 119LN-A3753 GO
680
December 1994
120 pF 27 pF 330 330 10 nF 220 pF 220 pF 2 4 5 6 10 nF 8 7 13 11 10 9 27 pF
Philips Semiconductors
VP = +12 V
APPLICATION INFORMATION
Baseband delay line
10 nF
12
TDA4661
colourdifference signals (R-Y) comb filtering Vo -(R-Y) 11 V i -(R-Y) 1 1 nF 1 nF 3 LINE DELAY 14 16 LINE DELAY
0.33 F
16
14
10 nF
chrominance signal 20 to 400 mV (p-p)
15
12 4
V o -(B-Y)
Y Vi -(B-Y)
220 pF
TDA4650
SSC (12 V)
7
10 k 24 1N4148 23 VP 18 k 22 nF 22 nF 6.8 k X1 X2 PLL off 3.3 k 30 pF 30 pF HUE control 10 k 8.8 7.2 47 nF MHz MHz 0.33 F 3.3 k +12 V 0.1 F 22 F (1) positioned close to pins 22 17 21 19 20 18 820 10 (1) 5 +5.1 V 9 270 100 nF HUE off
CVBS
(B-Y) comb filtering
8 7 VCO 2 6 13 15 i.c. n.c. n.c. n.c. n.c.
S-VHS (Y, C)
PAL/NTSC SECAM NTSC FILTERS
PAL SECAM NTSC-3.58 NTSC-4.43
28 27 26 25
LINE-LOCKED PLL / PULSE PROCESSING
colour standard switching signals
+5.1 V 1 (1) 100 nF 10
3
+12 V 10 560 5.1 V
MEH184.3
Product specification
TDA4661
Fig.3 Application circuit with TDA4650.

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