SANYO LA8608V Datasheet
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.
Functions
.
2nd mixer, 2nd local oscillator, IF amplifier, limiter,
quadrature detector, signal meter
.
Noise detector, noise amplifier, noise detector, Schmitt
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)
Package Dimensions
unit : mm
3175A-SSOP24
[LA8608V]
SANYO : SSOP24
Specifications
Maximum Ratings atTa=25°C
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage V
Allowable power dissipation Pd max 300 mW
Operating temperature Topr –20 to +75
Storage temperature Tstg –40 to +125
max 8.0 V
CC
Operating Conditions atTa=25°C
Parameter Symbol Conditions Ratings Unit
Recommended supply voltage V
Operating supply voltage range V
CC
op 1.8 to 6.0 V
CC
3.0 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
C
°
C
°
LA8608V
Operating Characteristics atTa=25°C, VCC=3V,fC= 21.7 MHz, fmod = 1 kHz, dev = ±3 kHz
Parameter Symbol
Output
min typ max Unit
Quiescent current Icco No input 2.8 3.8 mA
–3 dB limiting sensitivity –3dBL.S. –3 dB 5 11 dBµ
Demodulation output V
S/N ratio S/N(1) V
S/N(2) V
AM rejection ratio AMR V
Total harmonic distortion THD V
Noise detection output V
ND
V
ND
V
ND
V
ND
Vin= 80 dBµ 115 170 230 mVrms
O
= 80 dBµ, Non-modulation 54 60 dB
in
= 20 dBµ, Non-modulation 20 25 dB
in
= 80 dBµ, AM 30% modulation 30 40 dB
in
= 80 dBµ 0.7 2.0 %
in
(1) Vin= 10 dBµ, VCC= 2.1 V 1.9 V
(2) Vin= 10 dBµ, VCC= 3.0 V 1.6 2.2 2.8 V
(3) Vin= 10 dBµ, VCC= 5.0 V 2.3 V
(4) Vin= 30 dBµ 0 0.1 V
Schmitt trigger level SH 12 20 27 dBµ
Schmitt hysteresis SHhy 1 dB
Schmitt output level V
Signal meter output V
Comparator output V
Mixer conversion gain G
(1) Vin= 13 dBµ 0.5 V
SH
V
(2) Vin= 26 dBµ 2.8 V
SH
(1) Vin= 5 dBµ 0.1 0.3 V
SM
V
(2) Vin= 50 dBµ 0.8 1.1 1.4 V
SM
V
(3) Vin= 80 dBµ 1.3 1.6 2.0 V
SM
(1) V9= 1.5 V 2.8 V
COMP
V
(2) V9= 0.9 V 0.5 V
COMP
M
20 dB
Mixer input frequency 90 MHz
Mixer input resistance 3.6 kΩ
Mixer output resistance 1.8 kΩ
IF input resistance 1.8 kΩ
FM detection output impedance 2.4 kΩ
No.4077 - 2/14
Block Diagram and Pin Assignment
LA8608V
Pins
1. CRYSTAL 9. COMP(+) 17. OUT1
2. OSC 10. COMP-OUT 18. IN(–)2
3. MIX-OUT 11. LIMT.OUT 19. OUT2
4. V
REF
5. V
CC
6. IF-IN 14. S.DET. 22. NOISE-DET.
7. D.C1 15. DET-OUT 23. GND
8. D.C2 16. IN(–)1 24. MIX-IN
12. QUAD-COIL 20. IN(–)3
13. SCHMITT-OUT 21. OUT3
Unit (resistance:Ω, capacitance:F)
No.4077 - 3/14
AC Test Circuit
LA8608V
Sample Application Circuit (1)
Unit (resistance:Ω, capacitance:F)
Unit (resistance:Ω, capacitance:F)
No.4077 - 4/14
Sample Application Circuit (2)
LA8608V
Unit (resistance:Ω, capacitance:F)
Allowable power dissipation, Pd max - mW
Ambient temperature, Ta -°C
No.4077 - 5/14
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