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Ordering number: EN 5559
Monolithic Linear IC
LA7976 PAL SIF Converter Circuit for TV and VCR Multi-system
Overview
The LA7976 is an IC that converts PAL SIF signals (5.5 MHz, 6 MHz, and 6.5 MHz) to 6 MHz.
Package Dimensions
unit : mm
3042C-SIP5
[LA7976]
Functions
. Mixer, amplifier, oscillator, oscillator mute
Features
. Small SIP-5 package . Wide range of usage voltage (5 V to 12 V)
SANYO : SIP5
Specifications
Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Maximum feed current Allowable power dissipation Operating temperature Storage temperature Symbol VCC max I5 max I4 max Pd max Topr Tstg Ta % 85C Conditions Ratings 13.2 3 1 200 -20 to +85 -40 to +150 Unit V mA mA mW C C
Operating Conditions at Ta = 25C
Parameter Recommended supply voltage Operating voltage range Symbol VCC VCC op Conditions Ratings 9 4.5 to 12 Unit V V
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83096HA(II) No.5559-1/5
LA7976
Operating Characteristics at Ta = 25C, VCC = 9 V
Parameter Current drain Conversion gain 5.5 MHz 6.5 MHz 6.0 MHz Oscillation level Maximum output level Input impedance Pin voltages 500 kHz level difference relative to 6 MHz Maximum input level Symbol ICC G5.5 G6.5 G6.0 VOSC VO max Ri V1 V4 V5 OSC leak VIN max Conditions 80 dB/V input 80 dB/V input 80 dB/V input, Pin 4 grounded with 10 k 5.5 MHz 100 dB/V input 5.5 MHz input Test point Pin 2 Pin 5 Pin 5 Pin 5 Pin 4 Pin 5 Pin 1 Pin 4 Pin 5 Pin 5 min 5 10 10 10 15 104 2.6 7.3 7.2 30 85 typ 6.5 13.5 13.5 13.5 48 108 4.8 3 7.7 7.6 40 max 9 17 17 17 80 112 3.4 8.1 8 Unit mA dB dB dB mVp-p dB/V k V V V dB dB/V
Sample Application Circuit
Oscillator 500 kHz CSB503E5 Murata Industries, Ltd. 500 kHz EFOA512K04A Matsushita Electric, Ltd.
Unit (resistance: , capacitance: F)
No.5559-2/5
LA7976
Reference Example 1
Reference Example 2
Unit (resistance: , capacitance: F)
No.5559-3/5
LA7976
. Pin 1 is the SIF input pin.
The filter in Figure 2 can be connected to the input section to improve the buzz characteristic. If C1 is too small, the buzz characteristic improves for normal input, but the filter cuts into the sound carrier and the buzz characteristic deteriorates for the P/S (picture/sound carrier) ratio.
Figure 1 Unit (resistance: , capacitance: F)
From video output section
Use C1 6 20 pF to 47 pF.
Figure 2
. Pin 4 is the ceramic oscillator pin.
To make the oscillation waveform approach a sine wave,the oscillation level is controlled internally. Oscillation levels of 15 to 80 mVp-p at Pin 4 give the waveform shown in Figure 4.
Figure 4 (Pin 4 oscillation waveform)
Figure 3
Unit (resistance: )
. Pin 5 is the output pin. The output from Pin 5 is input to the
SIF via a 6 MHz bandpass filter (BPF). When 5.5 MHz is input to Pin 1, the spectrum shown in Figure 6 is obtained at Pin 5. Output level
Ceramic BPF chracteristic
D/U ratio
Figure 5
Unit (resistance: ) Figure 6 (5.5 MHz input)
No.5559-4/5
LA7976
No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. Anyone purchasing any products described or contained herein for an above-mentioned use shall: 1 Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: 2 Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. 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 August, 1996. Specifications and information herein are subject to change without notice.
No.5559-5/5

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