LA7770
Operating Characteristics at Ta = 25˚C
Parameter
Quiescent current
Circuit current
Mixer input capacitance
Mixer input resistance
Mixer voltage gain
–3dB limiting sensitivity
S/N
Total harmonic distortion
Demodulation output
AM rejection
Meter drive
Squelch threshold voltage
Data shaper input current
Output saturation voltage
Duty
Symbol
Conditions
Icco
ICC
ci
ri
Vgm
Vi
S/N
THD
Vo
AMR
ID
V14TH
I16
V18(sat)
| TD |
SQ-off
SQ-on
100MHz
100MHz
RL=300Ω, 106.5M → 10.7M
∆F=±75kHz dev, at 1kHz
∆F=±75kHz dev, at 1kHz
∆F=±75kHz dev, at 1kHz
∆F=±75kHz dev, at 1kHz
AM : 30% at 1kHz
300µA → 600µA
DC
DC
I18=2mA
f=14kHz
Equivalent Circuit Block Diagram
Ratings
min
typ
22
29
23.0 30.5
7
680
9
12
25
47
55
0.6
300 440
47
55
5
12
0.8
1.5
0.7
0.1
2.5
Unit
max
37 mA
39.0 mA
pF
Ω
15 dB
31 dB/µV
dB
2%
600 mVrms
dB
20 µA/dB
2.2 V
3.0 µA
0.7 V
5.0 %
No.2208–2/7