SANYO LA7976

Ordering number: EN 5559
Monolithic Linear IC
LA7976
PAL SIF Converter Circuit
for TV and VCR Multi-system
Overview
Package Dimensions
The LA7976 is an IC that converts PAL SIF signals (5.5 MHz,
6 MHz, and 6.5 MHz) to 6 MHz.
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 = 25°C
Parameter
Maximum supply voltage
Maximum feed current
Allowable power dissipation
Symbol
Conditions
VCC max
Ratings
Unit
13.2
V
I5 max
3
I4 max
1
mA
200
mW
Pd max
Ta % 85°C
mA
Operating temperature
Topr
–20 to +85
°C
Storage temperature
Tstg
–40 to +150
°C
Ratings
Unit
Operating Conditions at Ta = 25°C
Parameter
Recommended supply voltage
Operating voltage range
Symbol
VCC
VCC op
Conditions
9
V
4.5 to 12
V
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
83096HA(II) No.5559-1/5
LA7976
Operating Characteristics at Ta = 25°C, VCC = 9 V
Parameter
Current drain
Conversion gain
5.5 MHz
6.5 MHz
Symbol
ICC
G5.5
G6.5
6.0 MHz
G6.0
Oscillation level
Maximum output level
Input impedance
Pin voltages
500 kHz level difference
relative to 6 MHz
Maximum input level
VOSC
VO max
Ri
V1
V4
V5
Conditions
80 dB/µV input
80 dB/µV input
80 dB/µV input, Pin 4
grounded with 10 kΩ
Test point
Pin 2
Pin 5
Pin 5
min
5
10
10
typ
6.5
13.5
13.5
max
9
17
17
Unit
mA
dB
dB
Pin 5
10
13.5
17
dB
Pin 4
Pin 5
15
104
80
112
Pin 1
Pin 4
Pin 5
2.6
7.3
7.2
48
108
4.8
3
7.7
7.6
mVp-p
dB/µV
kΩ
V
V
V
Pin 5
30
40
5.5 MHz 100 dB/µV input
5.5 MHz input
OSC leak
VIN max
85
3.4
8.1
8
dB
dB/µV
Sample Application Circuit
Oscillator
500 kHz CSB503E5
Murata Industries, Ltd.
500 kHz EFOA512K04A Matsushita Electric, Ltd.
Unit (resistance: Ω, capacitance: F)
No.5559-2/5
LA7976
Reference Example 1
Reference Example 2
Unit (resistance: Ω, 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: Ω, capacitance: F)
Use C1 6 20 pF to 47 pF.
From video
output section
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: Ω)
. 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: Ω)
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