SANYO LV3400

Ordering number : EN4862C
Bi CMOS LSI
LV3400M
FM Multiplex Filter
Overview
Package Dimensions
The LV3400M is a filter IC designed for FM multiplex
broadcast reception and is used in combination with the
Sanyo LC72700 demodulation/error correction IC. The
adoption of switched capacitor (SCF) technology means
that frequency adjustment is not required and that the
LV3400M provides stable operation.
unit: mm
3111-MFP14S
[LV3400M]
Functions
•
•
•
•
•
76 kHz band-pass filter (Gaussian filter)
54 kHz high-pass filter
125 kHz low-pass filter
Anti-aliasing filter
Limiter circuit
Features
• Adjustment-free, due to the use of SCF technology.
• Few external components are required.
SANYO: MFP14S
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Maximum input voltage
Allowable power dissipation
Symbol
Conditions
Ratings
VCC max
V3, V7, V12
Unit
6
–0.3 to VCC + 0.3
Pd max
180
V
V
mW
Operating temperature
Topr
–40 to +85
°C
Storage temperature
Tstg
–55 to +125
°C
Pin Assignment
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
13096HA (OT)/91295HA (OT)/83194TH (OT) No. 4862-1/4
LV3400M
Operating Conditions at Ta = 25°C
Parameter
Symbol
Operating supply voltage range
Conditions
Ratings
VCC
A composite signal corresponding to a 100%
FM modulation level
Unit
4.5 to 5.5
V
200 to 300
mVrms
8 to 30
mVrms
Input signal voltage range
VIN
Clock frequency
fCK
3.60
MHz
Clock input voltage
VCK
1.0 to VCC
Vp-p
fIN = 76 kHz, CW
Operating Characteristics at Ta = 25°C, VCC = 5 V, fCK = 3.6 MHz, VCK = 1 Vp-p
Parameter
Symbol
Current drain
SCF block common voltage
min
typ
max
Unit
ICCO
The pin 14 current for a no-signal input to VIN
Conditions
3.8
6
8
mA
V2
The pin 2 voltage for a no-signal input to VIN
2.1
2.3
2.5
V
Signal input resistance
Rin3
The pin 3 input resistance
36
kΩ
Clock input resistance
Rin12
The pin 12 input resistance
100
kΩ
[MSK Output]
MSK input sensitivity
V3S
MSK output high level
V10H
MSK output low level
V10L
The input level such that an MSK output with the same
frequency is acquired when a 76-kHz CW is applied
as VIN.
4
mVrms
4
VIN = 76 kHz, 4 mVrms, CW
V
0.4
V
Reference Characteristics
Ratings
Unit
AAF cutoff frequency
Parameter
Symbol
Conditions
300
kHz
HPF corner frequency
54
kHz
LPF cutoff frequency
125
kHz
BPF center frequency
76
kHz
BPF -3 dB frequency
19
kHz
Maximum in-band group delay time difference
±5
µs
Pin Functions
PinNo.
Symbol
1
GND
Description
2
VCOM
SCF block common. A decoupling capacitor must be used.
3
SIG. IN
Signal input. Input an FM modulated signal (composite signal). A modulated signal between 200 and 300 mVrms should be
input. The input sensitivity for a pure 76-kHz signal is 4 mVrms or lower.
10
MSK OUT
11
VREF
12
CLK IN
13
CLK OUT
14
VCC
4 to 9
NC, Test PIN
Ground
MSK output (CMOS output)
Limiter reference voltage. A low-pass filter is formed by the internal resistance (which is about 10 kΩ) and an external capacitor.
3.6-MHz clock input. The DC bias at the CMOS inverter input, to which a 100-kΩ feedback resistor is connected, is about
VCC/2. The clock signal is input through a capacitor.
The clock output that was wave-shaped by an inverter. This pin is normally left open.
Power supply
This pin must be left open.
Usage Notes
1. Pins 4 to 9 and pin 13 are left open in normal use.
2. The clock should be taken from the decoder (LC72700) clock output pin and input to pin through a capacitor of about
100 pF. Spurious radiation from the clock line can be reduced by inserting a resistor in the line and thus smoothing
the rising and falling edges. This signal is then input to pin 12 through a capacitor.
No. 4862-2/4
LV3400M
Test Circuit
Note: Pins 4 to 9 are left open.
No. 4862-3/4
LV3400M
■ No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace
equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of
which may directly or indirectly cause injury, death or property loss.
■ Anyone purchasing any products described or contained herein for an above-mentioned use shall:
➀ Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and
distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all
damages, cost and expenses associated with such use:
➁ Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on
SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees
jointly or severally.
■ Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for
volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied
regarding its use or any infringements of intellectual property rights or other rights of third parties.
This catalog provides information as of December, 1997. Specifications and information herein are subject to
change without notice.
No. 4862-4/4