december 1994 2 philips semiconductors product speci?cation baseband delay line TDA4661 features two comb filters, using the switched-capacitor technique, for one line delay time (64 m 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 m 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. general description 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). quick reference data ordering information symbol parameter min. typ. max. unit v p1 analog supply voltage (pin 9) 4.5 5 6 v v p2 digital supply voltage (pin 1) 4.5 5 6 v i p(tot) total supply current - 4.9 7.0 ma v i (r - y) input signal pal/ntsc (peak-to-peak value; pin 16) - 525 - mv (b - y) input signal pal/ntsc (peak-to-peak value; pin 14) - 665 - mv (r - y) input signal secam (peak-to-peak value; pin 16) - 1.05 - v (b - y) input signal secam (peak-to-peak value; pin 14) - 1.33 - v g v gain v o / v i of colour-difference output signals v 11 / v 16 for pal and ntsc 5.3 5.8 6.3 db v 12 / v 14 for pal and ntsc 5.3 5.8 6.3 db v 11 / v 16 for secam - 0.6 - 0.1 +0.4 db v 12 / v 14 for secam - 0.6 - 0.1 +0.4 db type number package name description version TDA4661 dip16 plastic dual in-line package; 16 leads (300 mil) long body sot38-4 TDA4661t so16 plastic small outline package; 16 leads; body width 3.9 mm sot109-1
december 1994 3 philips semiconductors product speci?cation baseband delay line TDA4661 block diagram TDA4661
+
+
14
16
11
12
signal
clamping
signal
clamping
line
memory
sample-
and-
hold
sample-
and-
hold
lp
lp
output
buffers
addition
stages
pre-amplifiers
sandcastle
detector
5
frequency
phase
detector
lp
6 mhz
cco
divider
by 192
divider
by 2
10
3
3 mhz shifting clock
gnd1
gnd2
v
p1
v
p2
?r?)
?b?)
colour-difference
input signals
1
9
analog supply
digital supply
colour- difference
output signals
?r?)
?b?)
meh182.2
sandcastle
pulse input
2
6
13
15
n.c.
n.c.
n.c.
n.c.
i.c.
line
memory
4, 8
7
fig.1 block diagram.
december 1994 4 philips semiconductors product speci?cation baseband delay line TDA4661 pinning symbol pin description v p2 1 +5 v supply voltage for digital part n.c. 2 not connected gnd2 3 ground for digital part (0 v) i.c. 4 internally connected sand 5 sandcastle pulse input n.c. 6 not connected i.c. 7 internally connected i.c. 8 internally connected v p1 9 +5 v supply voltage for analog part gnd1 10 ground for analog part (0 v) v o(r - y) 11 (r - y) output signal v o(b - y) 12 (b - y) output signal n.c. 13 not connected v i(b - y) 14 (b - y) input signal n.c. 15 not connected v i(r - y) 16 (r - y) input signal 2 3 4 5 6 7 8 1 9 10 11 12 13 14 15 16 v v v p2 n.c. gnd2 i.c. sand n.c. i.c. i.c. p1 gnd1 o(r - y) v o(b - y) n.c. v i(b - y) n.c. v i(r - y) TDA4661 meh183 fig.2 pin configuration. limiting values in accordance with the absolute maximum rating system (iec 134). ground pins 3 and 10 connected together. note 1. equivalent to discharging a 200 pf capacitor through a 0 w series resistor. thermal characteristics symbol parameter min. max. unit v p1 supply voltage (pin 9) - 0.5 +7 v v p2 supply voltage (pin 1) - 0.5 +7 v v 5 voltage on pin 5 - 0.5 v p + 1.0 v v n voltage on pins 11, 12, 14 and 16 - 0.5 v p v t stg storage temperature - 25 +150 c t amb operating ambient temperature 0 70 c v esd electrostatic handling for all pins (note 1) - 500 v symbol parameter value unit r thj-a thermal resistance from junction to ambient in free air sot38-4 75 k/w sot109-1 220 k/w
december 1994 5 philips semiconductors product speci?cation baseband delay line TDA4661 characteristics v p = 5.0 v; input signals as speci?ed in characteristics with 75% colour bars; super-sandcastle frequency of 15.625 khz; t amb = +25 c; measurements taken in fig.3 unless otherwise speci?ed. symbol parameter conditions min. typ. max. unit v p1 supply voltage (analog part; pin 9) 4.5 5 6 v v p2 supply voltage (digital part; pin 1) 4.5 5 6 v i p1 supply current - 4.2 6.0 ma i p2 supply current - 0.7 1.0 ma colour-difference input signals v i input signal (peak-to-peak value) (r - y) pal and ntsc (pin 16) - 525 - mv (b - y) pal and ntsc (pin 14) - 665 - mv (r - y) secam (pin 16) note 1 - 1.05 - v (b - y) secam (pin 14) note 1 - 1.33 - v v i(max) maximum symmetrical input signal (peak-to-peak value) (r - y) or (b - y) for pal and ntsc before clipping 1 - - v (r - y) or (b - y) for secam before clipping 2 - - v r 14, 16 input resistance - - 40 k w c 14, 16 input capacitance - - 10 pf v 14, 16 input clamping voltage proportional to v p 1.3 1.5 1.7 v colour-difference output signals v o output signal (peak-to-peak value) (r - y) on pin 11 all standards - 1.05 - v (b - y) on pin 12 all standards - 1.33 - v v 11 /v 12 ratio of output amplitudes at equal input signals v i14, 16 = 1.33 v (p-p) - 0.4 0 +0.4 db v 11, 12 dc output voltage proportional to v p 2.5 2.9 3.3 v r 11, 12 output resistance - 330 400 w g v gain for pal and ntsc ratio v o /v i 5.3 5.8 6.3 db gain for secam ratio v o /v i - 0.6 - 0.1 +0.4 db v n /v n+1 ratio of output signals on pins 11 and 12 for adjacent time samples at constant input signals v i14, 16 = 1.33 v (p-p); secam signals - 0.1 0 +0.1 db v n noise voltage (rms value; pins 11 and 12) v i14, 16 = 0 v; note 2 - - 1.2 mv s/n(w) weighted signal-to-noise ratio v o = 1 v (p-p); note 2 - 54 - db t d delay of delayed signals 63.94 64.0 64.06 m s delay of non-delayed signals 40 60 80 ns t tr transient time of delayed signal on pins 11 respectively 12 300 ns transient of secam signal - 350 - ns transient time of non-delayed signal on pins 11 respectively 12 300 ns transient of secam signal - 320 - ns
december 1994 6 philips semiconductors product speci?cation baseband delay line TDA4661 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; v i14, 16 = 0 (r s < 300 w ). 3. the leading edge of the burst-key pulse or h-blanking pulse is used for timing. sandcastle pulse input (pin 5) f bk burst-key frequency 14.2 15.625 17.0 khz f sand sandcastle frequency 14.2 15.625 17.0 khz v 5 top pulse voltage note 3 4.0 - v p + 1.0 v v slice internal slicing level v 5 - 1.0 - v 5 - 0.5 v i 5 input current - - 10 m a c 5 input capacitance - - 10 pf symbol parameter conditions min. typ. max. unit
december 1994 7 philips semiconductors product speci?cation baseband delay line TDA4661 application information fig.3 application circuit with tda4650. pal/ntsc
secam
ntsc
filters
16
14
15
12
10
9
8
7
5
6
13
11
4
2
3
1
24
17
18
20
19
21
22
23
pal
secam
ntsc-3.58
ntsc-4.43
28
27
26
25
colour standard
switching signals
y
cvbs
s-vhs
(y, c)
220 pf
10 nf
v = +12 v
10 nf
tda4650
220 pf
220 pf
coil:
toko 119ln-a3753 go
6.8 k
w
18 k
w
3.3 k
w
10 k
w
hue
control
v
p
hue
off
pll
off
22
nf
x1
x2
8.8
mhz
7.2
mhz
30
pf
30
pf
47 nf
3.3 k
w
ssc
(12 v)
line delay
line-locked pll /
pulse processing
12
11
v
1 nf
10 k
w
1 nf
colour-
difference
signals
14
16
2
6
13
15
4
8
7
TDA4661
3
5.1 v
?r?) comb filtering
?b?) comb filtering
5
470
w
680
w
27
pf
27 pf
120 pf
10 ?
330
w
330
w
chrominance signal
20 to 400 mv (p-p)
line delay
0.33 ?
10 nf
10 nf
+5.1 v
0.33 ?
0.1 ?
22
nf
10
9
meh184.3
p
(1) positioned close to pins
1
(1)
100 nf
(1)
+5.1 v
100 nf
22 ?
270
w
10
w
n.c.
n.c.
n.c.
n.c.
i.c.
560
w
+12 v
o -(r-y)
v
o -(b-y)
v
i -(r-y)
v
i -(b-y)
vco
1n4148
+12 v
820
w
10
w
|
