TDA4661T [NXP]
Baseband delay line; 基带延迟线
| 型号： | TDA4661T |
| 厂家： | 
NXP |
| 描述： | Baseband delay line |
| 文件： | 总6页 (文件大小：59K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Philips Semiconductors
Product specification
Baseband delay line
TDA4661
FEATURES
GENERAL DESCRIPTION
• Two comb filters, using the switched-capacitor
technique, for one line delay time (64 µs)
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).
• 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 µs 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
PARAMETER
analog supply voltage (pin 9)
MIN.
4.5
TYP.
MAX.
UNIT
5
5
6
6
V
V
VP2
IP(tot)
VI
digital supply voltage (pin 1)
4.5
−
total supply current
4.9
7.0
−
mA
mV
mV
V
±(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)
gain VO / VI of colour-difference output signals
V11 / V16 for PAL and NTSC
−
525
665
1.05
1.33
−
−
−
−
−
−
V
Gv
5.3
5.8
6.3
dB
dB
dB
dB
V12 / V14 for PAL and NTSC
5.3
5.8
6.3
V11 / V16 for SECAM
−0.6
−0.6
−0.1
−0.1
+0.4
+0.4
V12 / V14 for SECAM
ORDERING INFORMATION
TYPE
PACKAGE
NUMBER
NAME
DESCRIPTION
VERSION
TDA4661
DIP16
SO16
plastic dual in-line package; 16 leads (300 mil) long body
plastic small outline package; 16 leads; body width 3.9 mm
SOT38-4
TDA4661T
SOT109-1
December 1994
2
Philips Semiconductors
Product specification
Baseband delay line
TDA4661
BLOCK DIAGRAM
December 1994
3
Philips Semiconductors
Product specification
Baseband delay line
TDA4661
PINNING
SYMBOL
VP2
PIN
DESCRIPTION
MEH183
1
2
+5 V supply voltage for digital part
not connected
n.c.
V
P2
1
2
16
V
I(R−Y)
GND2
i.c.
3
ground for digital part (0 V)
internally connected
sandcastle pulse input
not connected
15 n.c.
n.c.
4
V
3
4
5
6
7
8
14
SAND
n.c.
5
GND2
I(B−Y)
6
13 n.c.
i.c.
i.c.
7
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
TDA4661
V
SAND
12
11
O(B−Y)
i.c.
8
VP1
9
V
n.c.
O(R−Y)
GND1
VO(R−Y)
VO(B−Y)
n.c.
10
11
12
13
14
15
16
10 GND1
i.c.
i.c.
9
V
P1
VI(B−Y)
n.c.
±(B−Y) input signal
not connected
Fig.2 Pin configuration.
VI(R−Y)
±(R−Y) input signal
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134). Ground pins 3 and 10 connected together.
SYMBOL PARAMETER MIN. MAX. UNIT
VP1 −0.5 +7
supply voltage (pin 9)
supply voltage (pin 1)
voltage on pin 5
V
VP2
V5
−0.5
−0.5
−0.5
−25
0
+7
V
VP + 1.0
VP
V
Vn
voltage on pins 11, 12, 14 and 16
storage temperature
V
Tstg
Tamb
VESD
+150
70
°C
°C
V
operating ambient temperature
electrostatic handling for all pins (note 1)
−
±500
Note
1. Equivalent to discharging a 200 pF capacitor through a 0 Ω series resistor.
THERMAL CHARACTERISTICS
SYMBOL
Rthj-a
PARAMETER
VALUE
UNIT
thermal resistance from junction to ambient in free air
SOT38-4
75
K/W
K/W
SOT109-1
220
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
PARAMETER
CONDITIONS
MIN.
4.5
TYP.
MAX.
UNIT
VP1
VP2
IP1
supply voltage (analog part; pin 9)
supply voltage (digital part; pin 1)
supply current
5
5
6
6
V
4.5
−
V
4.2
0.7
6.0
1.0
mA
mA
IP2
supply current
−
Colour-difference input signals
VI
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)
−
−
−
−
525
665
1.05
1.33
−
−
−
−
mV
mV
V
note 1
±(B−Y) SECAM (pin 14)
note 1
V
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
input resistance
before clipping
before clipping
1
−
−
V
2
−
−
V
R14, 16
C14, 16
V14, 16
−
−
40
10
1.7
kΩ
pF
V
input capacitance
−
−
input clamping voltage
proportional to VP
1.3
1.5
Colour-difference output signals
VO
output signal (peak-to-peak value)
±(R−Y) on pin 11
±(B−Y) on pin 12
all standards
all standards
−
1.05
1.33
0
−
V
−
−
V
V11/V12
ratio of output amplitudes at equal input VI14, 16 = 1.33 V (p-p)
signals
−0.4
+0.4
dB
V11, 12
R11, 12
Gv
DC output voltage
output resistance
gain for PAL and NTSC
gain for SECAM
proportional to VP
2.5
−
2.9
330
5.8
−0.1
0
3.3
V
400
6.3
Ω
ratio VO/VI
ratio VO/VI
5.3
−0.6
−0.1
dB
dB
dB
+0.4
+0.1
Vn/Vn+1
ratio of output signals on pins 11 and 12 VI14, 16 = 1.33 V (p-p);
for adjacent time samples at constant
input signals
SECAM signals
Vn
noise voltage
(RMS value; pins 11 and 12)
VI14, 16 = 0 V; note 2
VO = 1 V (p-p); note 2
−
−
1.2
mV
S/N(W)
td
weighted signal-to-noise ratio
delay of delayed signals
−
54
−
dB
µs
ns
ns
63.94
40
64.0
60
64.06
80
delay of non-delayed signals
ttr
transient time of delayed signal on
pins 11 respectively 12
300 ns transient of
SECAM signal
−
350
−
transient time of non-delayed signal on
pins 11 respectively 12
300 ns transient of
SECAM signal
−
320
−
ns
December 1994
5
Philips Semiconductors
Product specification
Baseband delay line
TDA4661
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Sandcastle pulse input (pin 5)
fBK
burst-key frequency
sandcastle frequency
top pulse voltage
internal slicing level
input current
14.2
15.625 17.0
15.625 17.0
kHz
kHz
V
fSAND
V5
Vslice
I5
14.2
note 3
4.0
−
−
−
−
VP + 1.0
V5 − 1.0
V5 − 0.5
10
V
−
−
µA
pF
C5
input capacitance
10
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 Ω).
3. The leading edge of the burst-key pulse or H-blanking pulse is used for timing.
December 1994
6
Philips Semiconductors
Product specification
Baseband delay line
TDA4661
APPLICATION INFORMATION
December 1994
7
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