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Ordering number : EN2558A
Monolithic Linear IC
LA7054
Video, Audio Signal Processor
for UHF Band RF Modulator
Overview
Package Dimensions
The LA7054 is a video, audio signal processor IC for UHF unit: mm
band RF modulators. It performs the functions of TSG (test
signal generator), video clamp circuit, white clip circuit, 3017C-SIP9
audio FM modulator. It is highly stable to supply voltage
variations because the LA7054 has an internal voltage
[LA7054]
regulator.
Functions
• Audio FM modulator
• Sync pulse peak clamp
• TSG
• White clip
• Voltage regulator
Features
• Low-voltage operation : VCC=5V
• Highly stable to supply voltage variations because the
LA7054 has an internal voltage regulator.
• On-chip TSG (test signal generator).
• Good frequency characteristic of white clip.
• Wide amplitude of audio carrier and less high-frequency
spurious interference.
• Low audio distortion.
• Low current drain : –30% (compared with our similar
ICs).
• Minimum number of parts required : Peripherals of clock
oscillator for TSG.
• Small-sized package : 9-pin SIP
SANYO: SIP9
Specifications
Maximum Ratings at Ta=25°C
Parameter
Symbol
Maximum supply voltage
Allowable power dissipation
VCC max
Pd max
Operating temperature
Topr
Storage temperature
Tstg
Conditions
Ta60°C
Ratings
9
250
–20 to +80
–40 to +125
Unit
V
mW
°C
°C
Operating Conditions at Ta=25°C
Parameter
Symbol
Recommended supply voltage
Operating voltage range
VCC
VCC op
Conditions
Ratings
5
4.25 to 7.00
Unit
V
V
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73097HA (KT)/92895TH/6257TA, TS No.2558-1/3

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LA7054
Operating Characteristics at Ta=25°C, VCC=5V
Parameter
Symbol
SW Mode
SW1 SW2 SW3
Current drain
ICC a a a
Video clamp voltage
VCL a b a
White clip level
VWC c – a
TSG output amplitude
TSG V/S ratio
VTO – – b
V/S – – b
Horizontal sync signal period
Horizontal sync signal width
White signal width
tS
HS
HV
––b
––b
––b
Sync-1st white signal rise time tV1
––b
Sync-2nd white signal rise time tV2
––b
Audio carrier amplitude
VAO – – b
Audio modulation degree A
ms – – –
Audio modulation degree B
ms – – –
Audio modulation degree C
ms – – –
Audio modulation degree D
ms – – –
Audio modulation degree E
ms – – –
Audio distortion
THD – – –
Conditions
VWC=V1–VCL
V1 : Output voltage
Input signal : 1kHz
4.5Vp-p,
±50kHz : 100%
Same as above
min
10
1.35
1.10
Ratings
Unit
typ max
14 18 mA
1.60 1.85 Vp-p
1.14 1.18 Vp-p
0.85 1.00 1.15 Vp-p
6.0/4.0 6.5/3.5 7.2/2.8
63.7 64.0 64.3 µs
3.6 4.0 4.4 µs
3.6 4.0 4.4 µs
22 24 26 µs
38 40 42 µs
1.05 1.30 1.55 Vp-p
73 81 89 %
81 90 99 %
90 100 110 %
99 110 121 %
109 121 133 %
– 0.3 1.5 %
Equivalent Circuit Block Diagram
No.2558-2/3

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Test Circuit
LA7054
Ceramic resonator
5.5MHz coil
Murata
Toko
Sumida
CSB500E54
BCRK500B
2239-334
TSG Output Waveform
Unit (resistance : , Capacitance : F)
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 lose.
Anyone purchasing any products described or contained herein for an above-mentioned use shall:
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:
Not impose any responsibilty 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 guarant-
eed 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 July, 1997. Specifications and information herein are subject to
change without notice.
No.2558-3/3