SANYO LA7054 Datasheet
LA7054
Ordering number : EN2558A
Video, Audio Signal Processor
for UHF Band RF Modulator
Monolithic Linear IC
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
73097HA (KT)/92895TH/6257TA, TS No.2558-1/3
Package Dimensions
unit: mm
3017C-SIP9
[LA7054]
SANYO: SIP9
Specifications
Maximum Ratings
at Ta=25°C
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage V
CC
max 9 V
Allowable power dissipation Pd max Ta≤60°C 250 mW
Operating temperature Topr –20 to +80 °C
Storage temperature Tstg –40 to +125 °C
Operating Conditions at Ta=25°C
Parameter Symbol Conditions Ratings Unit
Recommended supply voltage V
CC
5V
Operating voltage range V
CC
op 4.25 to 7.00 V
Overview
The LA7054 is a video, audio signal processor IC for UHF
band RF modulators. It performs the functions of TSG (test
signal generator), video clamp circuit, white clip circuit,
audio FM modulator. It is highly stable to supply voltage
variations because the LA7054 has an internal voltage
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
LA7054
No.2558-2/3
Operating Characteristics at Ta=25°C, V
CC
=5V
Parameter Symbol
SW Mode
Conditions
Ratings
Unit
SW1 SW2 SW3 min typ max
Current drain I
CC
a a a 10 14 18 mA
Video clamp voltage V
CL
a b a 1.35 1.60 1.85 Vp-p
White clip level V
WC
c – a VWC=V1–V
CL
1.10 1.14 1.18 Vp-p
V1 : Output voltage
TSG output amplitude V
TO
– – b 0.85 1.00 1.15 Vp-p
TSG V/S ratio V/S – – b 6.0/4.0 6.5/3.5 7.2/2.8
Horizontal sync signal period t
S
– – b 63.7 64.0 64.3 µs
Horizontal sync signal width H
S
– – b 3.6 4.0 4.4 µs
White signal width H
V
– – b 3.6 4.0 4.4 µs
Sync-1st white signal rise time t
V
1 – – b 22 24 26 µs
Sync-2nd white signal rise time t
V
2 – – b 38 40 42 µs
Audio carrier amplitude V
AO
– – b 1.05 1.30 1.55 Vp-p
Audio modulation degree A ms – – – Input signal : 1kHz 73 81 89 %
Audio modulation degree B ms – – – 4.5Vp-p, 81 90 99 %
Audio modulation degree C ms – – – ±50kHz : 100% 90 100 110 %
Audio modulation degree D ms – – – 99 110 121 %
Audio modulation degree E ms – – – 109 121 133 %
Audio distortion THD – – – Same as above – 0.3 1.5 %
Equivalent Circuit Block Diagram
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