Ordering number: EN 4077A
Monolithic Linear IC
LA8608V
1.8 V Low-Voltage Narrowband
FM-IF System
Overview
The LA8608V is a narrowband FM-IF system intended for
communications equipment, operates at just 1.8 V, and is
contained in an ultrasmall package with a 0.65 mm pitch. In
addition to the various functions needed for reception, the
LA8608V also offers other functions such as noise detection
and electric field intensity detection, and is optimum for
compact designs, such as for cordless phones.
Package Dimensions
unit : mm
3175A-SSOP24
[LA8608V]
Functions
.
2nd mixer, 2nd local oscillator, IF amplifier, limiter,
.
quadrature detector, signal meternoise detector, Schmitt
Noise detector, noise amplifier,
trigger, comparator
Features
.
Because this IC has three independent noise detection and
.
.
.
amplification amplifiers, it can be used to form a secondary
biquad bandpass filter; furthermore, because it is equipped
with detector and Schmitt trigger functions, it can be easily
used for carrier sense applications.
Broad signal meter linearity (70 dB typ.)
Low operating voltage: 1.8 V to 6 V
Small package: SSOP-24 (0.65 mm pitch)
SANYO : SSOP24
Specifications
Maximum Ratings
at Ta = 25 °C
Parameter
Maximum supply voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
V
CC
max
Pd max
Topr
Tstg
Conditions
Ratings
8.0
300
–20 to +75
–40 to +125
Unit
V
mW
°C
°C
Operating Conditions
at Ta = 25 °C
Parameter
Recommended supply voltage
Operating supply voltage range
Symbol
V
CC
V
CC
op
Conditions
Ratings
3.0
1.8 to 6.0
Unit
V
V
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
53095HA (II) - No.4077 1/14
LA8608V
Operating Characteristics
at Ta = 25 °C, V
CC
= 3 V, f
C
= 21.7 MHz, fmod = 1 kHz, dev = ±3 kHz
Parameter
Quiescent current
–3 dB limiting sensitivity
Demodulation output
S/N ratio
AM rejection ratio
Total harmonic distortion
Noise detection output
Symbol
Icco
–3dBL.S.
V
O
S/N(1)
S/N(2)
AMR
THD
V
ND
(1)
V
ND
(2)
V
ND
(3)
V
ND
(4)
SH
SHhy
V
SH
(1)
V
SH
(2)
V
SM
(1)
V
SM
(2)
V
SM
(3)
V
COMP
(1)
V
COMP
(2)
G
M
Output
No input
–3 dB
V
in
= 80 dBµ
V
in
= 80 dBµ, Non-modulation
V
in
= 20 dBµ, Non-modulation
V
in
= 80 dBµ, AM 30% modulation
V
in
= 80 dBµ
V
in
= 10 dBµ, V
CC
= 2.1 V
V
in
= 10 dBµ, V
CC
= 3.0 V
V
in
= 10 dBµ, V
CC
= 5.0 V
V
in
= 30 dBµ
min
typ
2.8
5
170
60
25
40
0.7
1.9
2.2
2.3
0
20
1
max
3.8
11
230
Unit
mA
dBµ
mVrms
dB
dB
dB
%
V
V
V
V
dBµ
dB
V
V
V
V
V
V
V
dB
MHz
kΩ
kΩ
kΩ
kΩ
115
54
20
30
2.0
2.8
0.1
27
0.5
1.6
Schmitt trigger level
Schmitt hysteresis
Schmitt output level
Signal meter output
12
V
in
= 13 dBµ
V
in
= 26 dBµ
V
in
= 5 dBµ
V
in
= 50 dBµ
V
in
= 80 dBµ
V
9
= 1.5 V
V
9
= 0.9 V
2.8
0.8
1.3
2.8
0.1
1.1
1.6
0.3
1.4
2.0
0.5
20
90
3.6
1.8
1.8
2.4
Comparator output
Mixer conversion gain
Mixer input frequency
Mixer input resistance
Mixer output resistance
IF input resistance
FM detection output impedance
No.4077 - 2/14
Embedded System
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