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Ordering number : ENN6803
Monolithic Linear IC
LA7567GM
TV and VCR VIF/SIF IF Signal-Processing Circuit with NTSC SPLIT Support
Overview
The LA7567GM is an NTSC SPLIT support VIF/SIF IF IC that adopts a semi-adjustment-free system. The VIF block adopts a technique that makes AFT adjustment unnecessary by adjusting the VCO, thus simplifying the adjustment steps in the manufacturing process. PLL detection is adopted in the FM detector. A 5-V powersupply voltage is used to match that used in most multimedia systems. In addition, this IC also includes a buzz canceller to suppress Nyquist buzz and provide high audio quality.
Features
* Both AFT and SIF inductors built in, thus making adjustment of external inductance unnecessary. * Built-in buzz canceller for excellent audio performance. * VCC = 5 V, low power dissipation (250 mW)
Package Dimensions
unit: mm 3112A-MFP24S
[LA7567GM]
24 13
Functions
[VIF] * VIF amplifier * PLL detector * BNC * RF AGC * EQ amplifier * AFT * IF AGC * Buzz canceller [First SIF] * First SIF * First SIF detector * AGC [SIF] * Multi-format SIF converter * Limiter amplifier * PLL FM detector
5.4
12.5
0.15
0.35
1.0
0.1 1.5
(0.75)
SANYO: MFP24S
Specifications
Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Circuit voltage Symbol VCC max V13, V17 I6 Circuit current I10 I24 Allowable power dissipation Operating temperature Storage temperature Pd max Topr Tstg TA 50C, Independent IC *: Mounted on a printed circuit board Conditions Ratings 6 VCC -3 -10 -2 420 720 -20 to +70 -55 to +150 Unit V V mA mA mA mW mW C C
Note: When mounted on a 65 x 72 x 1.6 mm paper/phenolic resin printed circuit board.
Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft's control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications. SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO products described or contained herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
D1401RM (OT) No. 6803-1/14
0.63
1
12
1.7max
7.6
LA7567GM Operating Conditions at Ta = 25C
Parameter Recommended supply voltage Operating supply voltage range Symbol VCC VCC op Conditions Ratings 5 4.5 to 5.5 Unit V V
Electrical Characteristics at Ta = 25C, VCC = 5.0 V, fp = 45.75 MHz
Parameter [VIF Block] Circuit current Maximum RF AGC voltage Minimum RF AGC voltage Input sensitivity AGC range Maximum allowable input No-signal state video output voltage Synchronizing signal tip voltage Video output level Black noise threshold voltage Black noise clamp voltage Video signal-to-noise ratio C-S beat Frequency characteristics Differential gain Differential phase No-signal state AFT voltage Maximum AFT voltage Minimum AFT voltage AFT detection sensitivity VIF input resistance VIF input capacitance APC pull-in range (U) APC pull-in range (L) AFT tolerance frequency 1 VCO1 maximum variability range (U) VCO1 maximum variability range (L) VCO control sensitivity Sync ratio [First SIF Block] Conversion gain 4.5 MHz output level First SIF maximum input First SIF input resistance First SIF input capacitance [SIF Block] Limiting sensitivity FM detector output voltage AMR rejection ratio Total harmonic distortion SIF S/N [SIF Converter] Maximum output level V max 110 116 122 dBV Vli (lim) VO (FM) AMR THD S/N (FM) 59 4.5 MHz 25 kHz * 44 350 50 50 450 60 0.3 65 0.8 56 570 dBV mVrms dB % VG SO SIN max RIN (SIF) CIN (SIF) 41.25 MHz 41.25 MHz 27 53 8 33 115 16 2 3 39 180 dB mVrms mVrms k pF I5 V14H V14L VIN GR VIN max V6 V6 tip VO VBTH VBCL S/N IC-S fC DG DP V13 V13H V13L Sf RIN CIN fPU fPL dfa1 dfu dfl B VS 1.2 25.0 -200 1.0 45.75 MHz 45.75 MHz 0.7 2.0 4.0 0 14 6 MHz S1 = OFF 27 53 90 2.1 0.7 0.95 0.5 1.2 48 38 -3.0 40 VCC - 0.5 47.5 VCC 0 33 58 96 2.4 1.0 1.1 0.8 1.5 52 43 -1.5 3.0 3 2.5 4.4 0.18 21 1.5 3 1.5 -2.0 0 1.5 -2.0 3.2 28.5 -1.4 5.0 31.5 -1.4 +200 6.5 5 3.0 5.0 1.00 28 2.7 1.3 1.25 1.1 1.8 0.5 39 54.5 mA V V dBV dB dBV V V Vp-p V V dB dB dB % deg V V V mV/kHz k pF MHz MHz kHz MHz MHz kHz/mV % Symbol Conditions Ratings min typ max Unit
Note: *The FM detector output level can be reduced and the FM dynamic range can be increased by inserting a resistor and a capacitor in series between pin 23 and ground.
No. 6803-2/14
LA7567GM Pin Assignment
2nd SIF INPUT BIAS FILTER MIX OUT CER.OSC VCC VIDEO OUT EQ FILTER EQ INPUT APC FILTER
1 2 3 4 5 6
24 FM DET OUT 23 FM FILTER
800
Pd max -- Ta
Mounted on a printed circuit board
Allowable power dissipation, Pd max -- W
22 1st SIF OUT (NICAM OUT) 21 RF AGC VR 20 GND 19 VIF
720
700 600 500 400 300 200 100 0 -20
420
Independent IC
LA7567GM
7 8 9 18 VIF 17 IF AGC FILTER 16 1st SIF AGC FILTER 15 1st SIF INPUT 14 RF AGC OUT 13 AFT OUT
VIDEO DET OUT 10 VCO COIL 11 VCO COIL 12
0
20
40
60
70
80
100
Ambient temperature, Ta -- C
Top view
A13679
Internal Equivalent Circuit and External Components
IF IN PUT 9V 30k 0.01F 0.01F
10k-B
0.01F
AUDIO OUT PUT
RFAGC VR 7.5k 0.01F 1F SAW(P) 0.022F 0.01F SAW (S)
RF AGC OUT PUT
100k
24
23
1k 1k
22
21
20
19
18
2k
17
16
1k
15
14
100
13
1k
300
1k
1k
2k 1k 2k
620 30pF 6k 500
3.3k
V
10k
1k
1k 1k
1.2k
1k
10k
V
400 1k 2k 18k 200 400 1V 9.2k 200
1
2
0.47 to 1F
3
10k
4
5
6
7
8
0.47F
9 +
150
10
11
100F
330
0.01F
BPF 6MHz
+
3k
330
VCO COIL VCC GND
VIDEO OUT
1.2k
V
12
100k
+
AFT OUTPUT
T00134
No. 6803-3/14
LA7567GM AC Characteristics Test Circuit
VIF IN 1st SIF OUT (NICAM OUT) RF AGC VR 0.01F 10k-B FM DET OUT (D) 7.5k 1F 51 1st SIF IN 9V IF AGC 51 1000pF 30k RF AGC OUT (F)
0.01F (M)
0.01F
0.01F
0.01F
(M) 0.01F
+ 23 22
0.01F
GND
0.01F
100k
24
21
20
19
18
17
16
15
14
13
FM DET
RF AGC
IF AGC
VIF AMP
AGC
1st AMP
VIDEO DET
1st DET
AFT
HPF LIM AMP HPF MIX HPF EQ AMP VCO
1
0.01F 51
2
3
S 2 10k 10k
4 +
5
0.01F
6
100k
7
1.5k
8 +
150
9
0.47F
10
11
24pF
12
1F
+
2nd SIF IN
CONV.OUT (E)
VIDEO OUT (A)
S1
560
330
100k
AFT OUT (B)
VCC GND
T00135
Test Circuit
Impedance analyzer VIF IN 0.01F 0.01F 10k 1st SIF IN 0.01F
0.01F
0.01F
0.01F
0.01F
0.01F
0.01F
0.01F
100k
24
23
22
21
20
19
18
17
16
15
14
13
LA7567GM
1
0.01F
2
3
10k
4
5
6
7
330
8
9
10
11
12
100k VCC
T00136
0.01F
100F
+
No. 6803-4/14
LA7567GM Application Circuit Diagrams NT (US) SPLIT
IN PUT TSF1241 SAW(P) 10k-B (M) 0.022F (M) 0.01F 0.01F AF OUT 1F 7.5k SAW (S) RF AGC OUT 9V 30k 1000pF 100k
24
23
22
21
20
19
18
17
16
15
14
13
FM DET
RF AGC
IF AGC
VIF AMP
AGC
1st AMP
VIDEO DET
1st DET
AFT
HPF LIM AMP HPF MIX HPF EQ AMP VCO
1 +
BPF
2
1F
3
10k
4
100F
5 +
0.01F
6
7
8
150
9
0.47F
10
560
11
12
330
15H 330 VCC GND VIDEO OUT
T00138
JAPAN SPLIT
IN PUT TSF1137 SAW (S) RF AGC OUT 9V 30k 1000pF 100k
1F
10k-B
(M) 0.022F
(M) 0.01F
24
23
22
21
20
19
18
17
16
15
14
13
FM DET
RF AGC
IF AGC
VIF AMP
AGC
1st AMP
VIDEO DET
1st DET
AFT
HPF LIM AMP HPF MIX HPF EQ AMP VCO
1 +
BPF
2
1F
3
10k
4
100F
5 +
0.01F
6
7
8
150
9
0.47F
10
560
11
12
330
15H 330 VCC GND VIDEO OUT
T00139
2.2k
100k
1k
0.01F
0.01F
AF OUT
7.5k
+
GND
SAW(P)
2.2k
100k
1k
0.01F
+
GND
1H
AFT OUT
AFT OUT
No. 6803-5/14
LA7567GM NT (US) INTER
IN PUT TSF5220 RF AGC OUT 22H 1F (M) 0.022F AF OUT (M) 0.01F 10k-B 7.5k 9V 30k 1000pF 100k
62pF
0.01F
+
GND
SAW(P)
AFT OUT 100k
24
23
22
21
20
19
18
17
16
15
14
13
FM DET
RF AGC
IF AGC
VIF AMP
AGC
1st AMP
VIDEO DET
1st DET
AFT
* INTER 16PIN GND
HPF LIM AMP HPF MIX HPF EQ AMP VCO
1 +
BPF
2
1F
3
100k
4
100F
5 +
0.01F
6
7
8
150
9
0.47F
10
560
11
12
330
15H 330 VCC GND VIDEO OUT
T00140
2.2k
No. 6803-6/14
LA7567GM Sample Application Circuit When the SIF, first SIF, AFT, and RF AGC circuits are not used: * When the SIF circuit is not used: Leave pins 1, 23, and 24 open. Connect pin 2 to ground through a 2-k resistor. * When the first SIF circuit is not used: Leave pins 3, 4, 15 and 22 open. Connect pin 16 to ground. * When the AFT circuit is not used: Since there is no way to defeat the AFT circuit, connect a 100-k resistor and a 0.01-F capacitor in parallel between pin 13 and ground. * When the RF AGC circuit is not used: Leave pins 14 and 21 open. Insert a 0.01-F capacitor between pin 21 and ground for oscillation prevention.
IN PUT TSF5315 SAW (S) 100k
GND
SAW(P) 1k (M)
AFT OUT
24
23
22
21
20
19
18
17
16
15
14
13
FM DET
RF AGC
IF AGC
VIF AMP
AGC
1st AMP
VIDEO DET
1st DET
AFT
HPF LIM AMP HPF MIX HPF EQ AMP VCO
1
2k
2
3
4
100F
5 +
0.01F
6
7
8
150
9
0.47F
10
560
11
12
15H 330 VCC GND VIDEO OUT
T00141
2.2k
No. 6803-7/14
LA7567GM Pin Descriptions
Pin No. Pin Description Equivalent circuit
1
SIF INPUT
* SIF input. The input impedance is about 1 k. Since buzzing and buzz beating can occur if interference enters this input pin, care must be taken when design the pattern layout for this pin. Note that the video and chrominance signals are especially likely to interfere with the audio signal. Also, the VIF carrier signal can also cause interference.
1
1k 1k
A13680
3.6V 5k 5k
2
FM power supply filter
* FM detector bias line filter input. Used to improve the FM detector signal-to-noise ratio. C1 should be at least 0.47 F, and 1 F is recommended. If the FM detector is not used, connect pin 2 to ground through a 2-k resistor. This stops the FM detector VCO.
2
18k C1
A13681
3
200
3 4
SIF converter
* Pin 3 is the SIF converter output. The signal is passed through a 6-MHz bandpass filter and input to the SIF circuit.
A12030
10k
4
400 4(R)
A13682
5
VCC
* Use the shortest distance possible when decoupling VCC and ground.
Continued on next page.
No. 6803-8/14
LA7567GM
Continued from preceding page.
Pin No. Pin Description Equivalent circuit
* Equalizer circuit. This circuit is used to correct the video signal frequency characteristics. Pin 8 is the EQ amplifier input. This amplifier amplifies a 1.5-V p-p video signal to 2-V p-p. * Notes on equalizer amplifier design The equalizer amplifier is designed as a voltage follower amplifier with a gain of about 0 dB. When used for frequency characteristics correction, a capacitor, inductor, and resistor must be connected in series between pin 7 and ground. * Approach used in the equalizer amplifier If vi is the input signal and vo is the output signal, then: 6 7 8 EQ amp R1 ---- +1 (vi + vin) = Vo x G 2 Where G is the voltage-follower amplifier gain. Assume: vin: Imaginary short G: About 0 dB vin 0. Then: voG R1 AV = ---- = ---- +1 vi Z * R1 is the IC internal resistance, and is 1 k. In the application design, simply select Z to correspond to the desired characteristics. However, since the EQ amplifier gain will be maximum at the resonant point defined by Z, care is required to assure that distortion does not occur.
2k
1k
6
EQ OUTPUT
7
C L =Z R
A13683
EQ INPUT
8
200 AGC
A13684
FROM APC DET
9
APC FILTER
* PLL detector APC filter connection. The APC time constant is switched internally in the IC. When locked, the VCO is controlled by loop A and the loop gain is reduced. When unlocked and during weak field reception, the VCO is controlled by loop B and the loop gain is increased. For this APC filter we recommend: R = 150 to 390 C = 0.47 F
A 1k 1k 1k
B
9
R
+
C
A13685
Continued on next page.
No. 6803-9/14
LA7567GM
Continued from preceding page.
Pin No. Pin Description Equivalent circuit
2k
10
Composite video output
* Output for the video signal that includes the SIF carrier. A resistor must be inserted between pin 10 and ground to acquire adequate drive capability. R 430
15pF 2pF
10
A13686
11
11 12 VCO tank * VCO tank circuit used for video signal detection. See the coil specifications provided separately for details on the tank circuit. This VCO is a vector synthesis VCO.
12
A13687
13
AFT OUTPUT
* AFT output. The AFT center voltage is generated by an external bleeder resistor. The AFT gain is increased by increasing the resistance of this external bleeder resistor. However, this resistor must not exceed 390 k. This circuit includes a control function that controls the AFT voltage to naturally approach the center voltage during weak field reception.
13
A13688
9V
14
RF AGC OUTPUT
* RF AGC output. This output controls the tuner RF AGC. A protective 100- resistor is inserted in series with the open collector output. Determine the external bleeder resistor value in accordance with the specifications of the tuner.
To tuner
14
100
A13689
15
1st SIF INPUT
* First SIF input. A DC cut capacitor must be used in the input circuit. * If a SAW filter is used: The first SIF sensitivity can be increased by inserting an inductor between the SAW filter and the IC to neutralize the SAW filter output capacitance and the IC input capacitance. * When used in an intercarrier system: This pin (pin 15) may be left open.
2k
2k
15
A13690
Continued on next page. No. 6803-10/14
LA7567GM
Continued from preceding page.
Pin No. Pin Description Equivalent circuit
16
1st SIF AGC FILTER
* First SIF AGC filter connection. This IC adopts an average value AGC technique. The first SIF conversion gain is about 30 dB, and the AGC range is over 50 dB. A 0.01 F capacitor is normally used in filter connected to this pin. * When used in an intercarrier system: Connect this pin (pin 16) to ground. The IC internal switch will operate to connect the intercarrier output to the SIF converter input.
1k
1k
INTER/SPLIT SW LO=INTER
16
A13691
17
IF AGC FILTER
* IF AGC filter connection The signal peak-detected by the built-in AGC detector is converted to the AGC voltage at pin 17. Additionally, a second AGC filter (a lag-lead filter) used to create the dual time constants is provided internally in the IC. Use a 0.022-F capacitor as the external capacitor, and adjust the value according to the sag, AGC speed, and other characteristics.
1k
17
A13692
18
18 19 * VIF amplifier input. The input circuit is a balanced circuit, and the input circuit constants are: R 1.5 k C 3 pF
VIF input
19
A13693
20
GND
Continued on next page.
No. 6803-11/14
LA7567GM
Continued from preceding page.
Pin No. Pin Description Equivalent circuit
4.2V
21
RF AGC VR
* RF AGC VR connection. This pin sets the tuner RF AGC operating point. Also, the FM output and the video output can both be muted at the same time by connecting this pin to ground.
20k
20k
560
21
A13694
* First SIF output. Internally, this is an emitter-follower output with a 600- resistor attached. When used in an intercarrier system, the buzz characteristics can be improved by forming a chrominance carrier trap with this pin. 22 NICAM output
20k
20k 620
22
Forms a chrominance killer trap. 6k
A13695
22
23
FM filter
* Connection for a filter used to hold the FM detector output DC voltage fixed. Normally, a 1-F electrolytic capacitor should be used. The capacitance should be increased if the low band (around 50 Hz) frequency characteristics need to be improved. * The FM detector output level can be reduced and the FM dynamic range can be increased by inserting a resistor and a capacitor in series between pin 23 and ground.
1k
1k
23
R
+
C
A13696
24
FM Detector output
* Audio FM detector output. A 300- resister is inserted in series with an emitter-follower output. * For applications that support stereo: Applications that input this signal to a stereo decoder may find that the input impedance is reduced, the left and right signals are distorted, and that the stereo characteristics are degraded. If this problem occurs, add a resistor between pin 24 and ground. R1 5.1 k * For applications that support mono: Create an external deemphasis circuit. t = C x R2
R2
24
300 3.3k
C
R1
A13697
No. 6803-12/14
LA7567GM Notes on Sanyo SAW Filters There are two types of SAW filters, which differ in the piezoelectric substrate material, as follows: * Lithium tantalate (LiTaO3) SAW filter TSF11s s ... Japan s TSF12s s ... US s Although lithium tantalate SAW filters have the low temperature coefficient of -18 ppm/C, they suffer from a large insertion loss. However, it is possible, at the cost of increasing the number of external components required, to minimize this insertion loss by using a matching circuit consisting of coils and other components at the SAW filter output. At the same time as minimizing insertion loss, this technique also allows the frequency characteristics, level, and other aspects to be varied, and thus provides increased circuit design flexibility. Also, since the SAW filter reflected wave level is minimal, the circuit can be designed with a small in-band ripple level. * Lithium niobate (LiNbO3) SAW filter TSF52s s ... US s TSF53s s ... PAL s Although lithium niobate SAW filters have the high temperature coefficient of -72 ppm/C, they feature an insertion loss about 10 dB lower than that of lithium tantalate SAW filters. Accordingly, there is no need for a matching circuit at the SAW filter output. Although the in-band ripple is somewhat larger than with lithium tantalate SAW filters, since they have a low impedance and a small field slew, they are relatively immune to influences from peripheral circuit components and the geometry of the printed circuit board pattern. This allows stable out-of-band trap characteristics to be acquired. Due to the above considerations, lithium tantalate SAW filters are used in applications for the US and Japan that have a high IF frequency, and lithium niobate SAW filters are used in PAL and US applications that have a low IF frequency. Notes on SAW Filter Matching In SAW filter input circuit matching, rather than matching the IF frequency, flatter video band characteristics can be acquired by designing the tuning point to be in the vicinity of the audio carrier rather than near the chrominance carrier. The situation shown in figure on the right makes it easier to acquire flat band characteristics than that in figure on the left.
SAW filter characteristics The high band is reduced The high band is extended
Frequency
Frequency
A13698
With the Tuning Set to the IF frequency Coil Specifications
JAPAN f = 58.75 MHz
With the Tuning Set to the Vicinity of S and C
US f = 45.75 MHz
PAL f = 38.9 MHz
S
t=5t 0.12 o C = 24 pF
A12048
S
t=6t 0.12 o C = 24 pF
A12049
S
t=7t 0.12 o C = 24 pF
A12050
VCO coil
Test production no. V291XCS-3220Z Toko Co., Ltd. SAW filter (SPLIT) SAW filter (INTER) Toko Co., Ltd. 2-1-17 Higashi-yukigaya, Ohta-ku, Tokyo, Japan TEL: +81-3-3727-1167 Picture TSF1137U Sound
Test production no. 291XCS-3188Z Toko Co., Ltd. Picture TSF1241 Sound TSF5220 TSF5221
Test production no. 292GCS-7538Z Toko Co., Ltd. Picture TSF5315 Sound TSF5321 TSF5344
No. 6803-13/14
LA7567GM Notes on VCO Tank Circuits * Built-in capacitor VCO tank circuits When the power is turned on, the heat generated by the IC is transmitted through the printed circuit board to the VCO tank circuit. At this point, the VCO coil frame functions as a heat sink and the IC heat is dissipated. As a result, it becomes more difficult to transmit heat to the VCO tank circuit's built-in capacitor, and the influence of drift at power on is reduced. Therefore, it suffices to design the circuit so that the coil and capacitor thermal characteristics cancel. Ideally, it is better to use a coil with a core material that has low temperature coefficient characteristics. * External capacitor VCO tank circuits When an external capacitor is used, heat generated by the IC is transmitted through the printed circuit board directly to the VCO tank circuit external capacitor. While this capacitor is heated relatively early after the power is turned on, the coil is not so influenced as much by this heat, and as a result the power-on drift is increased. Accordingly, a coil whose core material has low temperature coefficient characteristics must be used. It is also desirable to use a capacitor with similarly low temperature coefficient characteristics. Note: Applications that use an external capacitor here must use a chip capacitor. If an ordinary capacitor is used, problems such as the oscillator frequency changing with the capacitor orientation may occur.
Specifications of any and all SANYO products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment. SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO products (including technical data, services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of SANYO Electric Co., Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO product that you intend to use. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties.
This catalog provides information as of December, 2001. Specifications and information herein are subject to change without notice. PS No. 6803-14/14

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