SANYO LA7775M Datasheet
Overview
The LA7775M is an FM receiver for CATV or FM
communications equipment. In addition to functions for
FM demodulation (oscillator, mixer, limiting IF amplifier,
and quadrature detection circuits) it also includes on chip
an FSK data shaper circuit, an RF amplifier, and a local
oscillator frequency switching circuit.
Functions
• RF amplifier
• Mixer
• Oscillator
• Oscillator switching
• Limiting IF amplifier
• Quadrature detection
• Data shaper
Features
• Wideband RF input
• On-chip RF amplifier
• On-chip oscillator frequency switching circuit
Package Dimensions
unit: mm
3045B-MFP24
Monolithic Linear Integrated Circuit
Ordering number : EN5736
63097HA(OT) No. 5736-1/5
SANYO: MFP24
[LA7775M]
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
Wideband FSK Receiver
LA7775M
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage V
CC
max 7V
Allowable power dissipation Pd max 350 mW
Operating temperature Topr –20 to +75 °C
Storage temperature Tstg –55 to +125 °C
Specifications
Maximum Ratings at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Recommended supply voltage V
CC
5V
Operating supply voltage range V
CC
op 4.5 to 5.5 V
Input frequency fin21, fin24 40 to 350 MHz
Operating Conditions at Ta = 25°C
No. 5736-2/5
LA7775M
Parameter Symbol Conditions
Ratings
Unit
min typ max
Current drain I
CCO
20 26 mA
Preamplifier input capacitance Ci21 100 MHz 7 pF
Preamplifier input resistance Ri21 100 MHz 1 kΩ
Preamplifier voltage gain Gp 350 MHz 15 dB
Mixer input capacitance Ci24 100 MHz 7 pF
Mixer input resistance Ri24 100 MHz 1 kΩ
Mixer conversion gain Gc 350 MHz 25 dB
–3 dB limiting sensitivity Vi ∆F = 75 kHz dev, at 1 kHz 10 16 dBµ
Demodulation output Vo ∆F = 75 kHz dev, at 1 kHz 180 250 mVrms
SAW switching threshold level V19TH 1.35 1.50 1.65 V
Data output high level V18H 4.5 V
Data output low level V18L 0.5 V
Oscillator output V2 117.2 MHz 0.35 Vp-p
Operating Characteristics at Ta = 25°C (VCC= 5 V, fo= 106.5 MHz, fIF = 10.7 MHz)
Equivalent Circuit Block Diagram and Test Circuit
PRE AMP
LIM.AMP
FMDET
OSC
RFGND
MIXER
SFE10.7MS2
117.2 MHz
119.2 MHz
390 Ω
510 Ω
1kΩ
2 kΩ
1 kΩ
330 Ω
390 Ω
10 kΩ
10 kΩ
DATA
SHAPER
24 23 22 21 20 19 18 17 16 15 14 13
1 2 3 4 5 6 7 8 9 10 11 12
220 pF
470 pF
470 pF
0.1 µF
0.01 µF
0.01 µF
0.033 µF
43 pF
0.033 µF
0.01 µF
47 µF
1 µH
3.9 µH0.01F
1000 pF
20 pF
20 pF
6 pF
20 pF
2200 pF
13 pF
2200 pF
5 pF
100 nH
GND
OSC
OUTPUT
V
CC
V
CC
V
CC
T00078
LO
SELECT
DATA
OUTPUT
RF
INPUT
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