HA11442A [RENESAS]
SPECIALTY CONSUMER CIRCUIT, PDIP16;
| 型号： | HA11442A |
| 厂家： | 
RENESAS TECHNOLOGY CORP |
| 描述： | SPECIALTY CONSUMER CIRCUIT, PDIP16 光电二极管 商用集成电路 |
| 文件： | 总22页 (文件大小：5968K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
HA11440A, HA11442A
Color TV Picture IF System
Functions
• PIF (picture intermediate frequency) amplifier
• Quasi-synchronous detector
• AFT with defeat terminal
• Video amplifier
• AGC (automatic gain control) circuit
• Tuner AGC output
• Noise canceller
Features
• Reduced 920-kHz beats and cross-color
• Improved differential gain (DG) and differential
phase (DP)
• Minimized external components
• Minimum level of forward AGC output voltage
adjusted by external resistors
1
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HA11440A, HA11442A
HA11440A, HA11442A
Absolute Maximum Ratings (Ta = 25°C)
Item
Symbol
Rating
Unit
–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
Supply voltage
VCC
15
V
-––———————————————————————————————————————————————
Mean level of maximum
output current at pin 1
IO
4
mA
-––———————————————————————————————————————————————
Power dissipation (Ta = 65°C)
PT
745
mW
-––———————————————————————————————————————————————
Operating temperature
Topr
–20 to +65
°C
-––———————————————————————————————————————————————
Storage temperature
Tstg
–55 to +125
°C
–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
Electrical Characteristics (Ta = 25°C, unless otherwise specified)
Item
Symbol
Min
Typ
Max
Unit
Test Conditions
–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
Supply current 1
IS1
27.0
39.0
51.3
mA
V1F
= 0
-––———————————————————————————————————————————————
Supply current 2
IS2
27.0
40.0
51.3
mA
V1F 80 dBµ
=
-––———————————————————————————————————————————————
Input sensitivity
Vin
35
40
45
dBµ
The input voltage at
which the video
output goes down by
1 dB
-––———————————————————————————————————————————————
Maximum input voltage
Vin(max)
93
98
—
dBµ
The input voltage at
which the video
output voltage varies
by 5%
-––———————————————————————————————————————————————
Video bandwidth
FC
6.0
7.5
—
The frequency at
which the video
output voltage goes
down by 3 dB
MHz
-––———————————————————————————————————————————————
Video output level
Vout
1.98
2.32
2.65
Vp-p
m = 0.875
-––———————————————————————————————————————————————
Sync tip voltage
VSYNC
5.20
5.60
5.90
V
-––———————————————————————————————————————————————
Noise canceller starting
voltage
VNC
1.20
1.50
1.80
V
-––———————————————————————————————————————————————
Differential gain
DG
—
8
12
%
m = 0.875, 5%
chroma added, DSB
signal inputted
-––———————————————————————————————————————————————
Differential phase
DP
—
2.5
6
deg.
m = 0.875, 5%
chroma added, DSB
signal inputted
-––———————————————————————————————————————————————
AGC charging time
constant
τc
—
350
500
µs
Input signal
modulated with
square wave
-––———————————————————————————————————————————————
AGC disharging time
constant
τd
—
14
28
ms
Input signal
modulated with
square wave
-––———————————————————————————————————————————————
Vertical interval distortion
VVER
—
50
100
mVp-p
-––———————————————————————————————————————————————
Minimum RF AGC voltage
VTR(min)
0
0
1.0
V
V1F 85 dBµ
=
-––———————————————————————————————————————————————
3
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HA11440A, HA11442A
HA11440A, HA11442A
Electrical Characteristics (cont)
Item
Symbol
Min
Typ
Max
Unit
Test Conditions
–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
Maximum RF AGC voltage
VTR(max)
11.00
11.70
11.95
V
V1F 65 dBµ
=
-––———————————————————————————————————————————————
Signal-to-noise ratio
SN
49
52
—
dB
V1F 80 dBµ,
=
CW input signal
-––———————————————————————————————————————————————
Noise limited sensitivity
VSN
—
48
52
dB
-––———————————————————————————————————————————————
PIF input resistance
at pin 12
Ri 12
—
1.80
—
kΩ
-––———————————————————————————————————————————————
PIF input resistance
at pin 13
Ri 13
—
1.80
—
kΩ
-––———————————————————————————————————————————————
PIF input capacitance
at pin 12
Ci 12
—
3.0
—
pF
-––———————————————————————————————————————————————
PIF input capacitance
at pin 13
Ci 13
—
3.0
—
pF
-––———————————————————————————————————————————————
Video output resistance
Rout
—
30
—
Ω
-––———————————————————————————————————————————————
AFT quiescent voltage
VM1
5.25
6.52
7.55
V
No input signal
-––———————————————————————————————————————————————
DC output voltage at AFT
VM2
6.45
6.52
6.59
V
Defeat on
-––———————————————————————————————————————————————
AFT detection sensitivity
µ
—
180
230
kHz/10V
IF sweep signal
input
-––———————————————————————————————————————————————
AFT hold range (high)
FAH
1.0
1.8
3.5
MHz
IF sweep signal
input
-––———————————————————————————————————————————————
AFT hold range (low)
FAL
–3.5
–1.8
–1.0
MHz
IF sweep signal
input
-––———————————————————————————————————————————————
Maximum AFT voltage
VA max
11.00
11.60
11.95
V
IF sweep signal
input
-––———————————————————————————————————————————————
Minimum AFT voltage
VA min
0.05
0.30
1.00
V
IF sweep signal
input
-––———————————————————————————————————————————————
Time constant at AGC
lock prevention circuit
τL
110
220
440
µs
-––———————————————————————————————————————————————
Gain attenuation
VAT
0
2
5
dB
RF stage gain of the
tuner attenuated
-––———————————————————————————————————————————————
Thermal deviation of
delay point
DDLT
–6
0
6
dB
Ta = –20°C to
+65°C
-––———————————————————————————————————————————————
Thermal deviation of
video output
DVOT
–5
0
5
%
Ta = –20°C to
+65°C
–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
4
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HA11440A, HA11442A
HA11440A, HA11442A
Differential Gain (DG) and Differential Phase
(DP)
R
= 1000 x (V /V ' – 1)
out O O
AFT Quiescent Voltage (VM1)
Connect a vectorscope to point A before
measuring, as in figure 39.
No input signal. S3 closed. V = 6 V. Measure the
G
voltage at point B.
AGC Charging Time Constant (τ ) and AGC
c
Discharging Time Constant (τ )
DC Output Voltage at AFT (VM2)
d
Measure the waveform at point D by
synchroscope. See figure 40.
S2 closed. Defeat on. Measure the voltage at point
B.
Minimum RF AGC Voltage (V
) and
AFT Detection Sensitivity (µ), AFT Hold Range
TR min
Maximum RF AGC Voltage (V
)
High (F
Maximum AFT Voltage (V
AFT Voltage (V
), AFT Hold Range Low (F ),
TR max
AM AL
), Minimum
A max
Adjust VR1 for 75 dBµ of the delay point and
measure the voltage at point C. See figure 41.
)
A min
With S3 closed, adjust V so that the minimum
G
Signal to Noise Ratio (SN)
output voltage level at point A goes to the same
level as the sync tip. (See figure 43.) Then measure
the output voltage at point B. (See figure 44.)
Connect an AC voltmeter to point A and measure
the noise voltage, as shown in figure 42.
Time Constant at AGC Lock Prevention Circuit
S/N = 20 log 3000/V where V (mV) is the value
the voltmeter reads.
(τ )
N
N
L
Increase the noise level to operate the noise
canceller. Extend the noise width gradually and
measure the noise width at which the noise
canceller stops operating.
Noise Limited Sensitivity (V
)
SN
Defined as the input voltage at which S/N is 30 dB.
PIF Input Resitance at Pin 12 and 13 (R
,
Gain Attenuation (V
)
AT
i12
R
)
i13
Attenuate the RF stage gain of the tuner. Adjust
VR1 for 75 dBµ of the delay point. See figure 45.
Measure with an R-X meter, with frequency
adjusted to 58.75 MHz.
Vertical Interval Distortion (V
)
VER
PIF Input Capacitance at Pin 12 and 13 (C
i12
i13
,
C
)
Measure the vertical interval distortion at point A,
as in figure 46.
Measure with an R-X meter, with frequency
adjusted to 58.75 MHz.
Video Output Resistance (R
)
out
Measure output voltage V at point A with S1
O
open.Then, connecting 1 kΩ to point A, measure
output voltage V ' with S1 open.
O
17
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HA11440A, HA11442A
HA11440A, HA11442A
External Components
Part
No.
Recommended
Value
Connected
Pins
Part
No.
Recommended
Value
Connected
Pins
––––—————————————————————––––—————————————————————
R1
R2
R3
R4
R5
R6
C1
C2
C3
L1
82 Ω
—
R11
330 Ω
4.3 kΩ
5.6 kΩ
3 kΩ
1
1.2 kΩ
6.8 kΩ
27 Ω
R12
R13
R14
560 Ω
330 Ω
0.01 pF
0.01 pF
0.01 pF
0.75 µH
2 SC 1906
S trap
Q2
2 SC 458
(3.9 k)
(R21)
––——————————————————————
R15
C9
L3
9.1 kΩ
22 pF
4, 5
Q1
––——————————————————————––——————————————————————
R1
L2
220 Ω
0.47 µH
12, 13
R16
D3
5.6 kΩ
7
1 S 2076
––——————————————————————C11
0.022 µF (ML)
C4
C5
0.01 µF
0.01 µF
12, 13
––——————————————————————
R17
47 kΩ
8
––——————————————————————R18
56 kΩ
C6
0.01 µF
11, 14
C12
4700 pF
––——————————————————————––——————————————————————
C7
0.47 µ
(tantalum)
300 k
15
C17
C18
L12
4.7 µ/25 V
0.01 pF
100 µF
9
R21
––——————————————————————––——————————————————————
R8
10 kΩ
16
R19
R20
C15
(3 k)
10
R9
6.8 kΩ
(15 k)
C8
0.1 pF
(4.7 µ/16 V)
VR1
10 k (B curve)
––––—————————————————————
––——————————————————————
20
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HA11440A, HA11442A
HA11440A, HA11442A
R
– R , S trap, Q , (R
)
External Components
11
14 21
2
Buffer amp between sound trap and video output.
When a ceramic filter is applied, R21 is connected
to pin 1 and functions as DC load. Unless R21 is
connected, differential gain characteristic,
differential phase characteristic, 920 kHz beat,
cross color, etc. deteriorate. Sound trap: Toko
BTKAC31086.
R – R , C – C , L , Q
1
6
1
3
1
1
Pre-amp for compensation of power loss caused by
SAW (surface acoustic wave) filter application.
The circuit constant is determined in the circuit
with Murata SAF-58MB (SAW filter). When using
another SAW filter, adjust L1 and R5 to match.
R
, C , L
R , L
15
9
3
7
2
Phase shift circuit. The circuit constant is
determined to get the best differential phase
characterisitic, (Q = 35). If the value of Q
(transistor) of the tank circuit or that of R15
(damping resistor) is changed, load resistance
between pins 4 and 5 is changed and the carrier
filter output voltage between pins 4 and 5 is
lowered. As a result, differential gain and
differential phase characteristics are impaired. L3:
Toko 10 k Bobin, 0.17 ø enamel wire, number of
turns = 5 T
For matching the SAW filter and IC. Since the
input resistance (1.8 KΩ typ) and input capacitance
(3.0 pF typ) of the IC are high enough, matching
with the SAW filter is easily done by changing the
values of R2 and L2. However, when the input
impedance of the SAW filter is high, unnecessary
external signals such as carrier filter output (pin 14
and 15), video output (pin 1), and so on impair the
weak electrical field characteristics. Use of the
SAW filter with lower impedance (below 200 Ω)
stabilizes weak electrical field characteristics. A
SAW filter with 14 – 18 dB P/S is recommended.
R
, D , C
16 11
3
C , C
4
5
R16, D3: Prevent excessive current, and protect IC
C11: Bypasses unnecessary current
Coupling capacitance between the SAW filter and
IC.
When pin 7 (AFT defeat pin) voltage is fixed
within the range of 3 V and VCC, operation of
AFT circuit is discontinued, and AFT output (pin
8) is fixed to the center point.
C
6
Capacitance for low pass and DC feedback
terminal of IF amp. Internal resistance is set at 6
kΩ (min 4.2 kΩ). The following connection is also
possible (see figure 47).
R
, R , C
17 18 12
AFT load resistance
C , R
7
21
C
, C , L
Capacitance for low pass at IF AGC. If smaller
capacitance is applied, high AGC response is
obtained, but vertical period distortion and sync tip
sag are impaired. A tantalum capacitor with high
temperature characteristic is recommended.
13 14 15
Filter capacitance at power source
R
, R , C
19 20 15
Determine RF AGC time constant. The internal
circuits of pin 10 are shown in figures 48 and 49.
Determine pin 10 load and time constant according
to automatic gain control characteristic of the tuner
(refer to the maximum output current).
R , R , C , VR
8
9
8
1
External circuit for determining delayed AGC
switching level.
21
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