la1145 Sanyo Semiconductor Corporation, la1145 Datasheet - Page 5

• Manufacturer Part Number: la1145
• Description: Fm If System Quadrature Detector For Car Radio
• Manufacturer: Sanyo Semiconductor Corporation

Sample Application Circuit
LS1140 and LS1145 Compared
Package
IF amp, limiter
Quadrature detector
AF preamp
AFC output
Signal meter output
Band muting
IF count buffer output
SD circuit
S/N
3 dBµ limiting sensitivity
Weak signal noise output
Parameter
Direct-coupled
25 dBµ (fixed)
LA1140
78 dBµ
SIP-16
j
j
j
j
j
j
–
–
Mute driver
output
LA1145, 1145M
25 to 40 dBµ
C-coupled
SIP-18Z
MFP-20
LA1145
86 dB
S-meter
output
j
j
j
C j
C j
j
j
C j
Improved linearity, variable S-meter gradient
Improved temperature stability,
V
Common with STRQ
For the LA1140, Coupled with the soft muting
function.
–3 dBµ limiting sensitivity variable,
independent of soft muting function
BE
Unit (resistance:
dependent
L1: 81N-014A (Sumida)
L2: 81N-014B (Sumida)
Remarks
, capacitance: F)
No. 2725-5/17
50 µs
DC
emphasis
capacitor