Ordering number : ENA1409
Monolithic Linear IC
LA72912V
FM Modulator and
Demodulator IC
Overview
The LA72912V is a FM modulation and demodulation single-chip IC. Its adjustment free modulation/demodulation circuit
significantly reduces the number of peripheral circuits required and can contribute to lower production costs.
Functions
• ASK modulation and demodulation
• Video signal FM modulation and demodulation
• Video signal emphasis and de-emphasis function
• Drop-Out detecting function of Video FM signal
• FM mute function at Second-Call
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
VCC max
7.0
V
Allowable power dissipation
Pd max
300
mW
Operating temperature
Topr
Storage temperature
Tstg
Ta ≤ 70°C *
-30 to +70
°C
-40 to +150
°C
* Mounted on a 114.3mm × 76.1mm × 1.6mm, glass epoxy board.
Recommended Operating Conditions at Ta = 25°C
Parameter
Symbol
Recommended supply voltage
VCC
Allowable operating voltage range
VCC op
Conditions
Ta = -30 to +70°C
Ratings
Unit
5.0
V
4.7 to 5.5
V
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer' s products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer' s products or
equipment.
21809 MS 20090128-S00005 No.A1409-1/12
LA72912V
Electrical Characteristics at Ta = 25°C, VCC = 5V
DC CHARACTERISTICS T6 = 0.4V, T17 = 2.0V, T18 = 0.4V
Parameter
Symbol
In
OUT
Conditions
Control terminal
CNT6L
T6
Low level of control terminal of ALL mode.
(Pin6,9) Low level
CNT17L
T17
T6 = 0.4V(DEMOD mode),T17 = 0.4V (Standby mode)
Control terminal
CNT6H
T6
High level of input terminal of ALL mode
(Pin6,9)High level
CNT17H
T17
T6 = 2.0V (MOD mode), T17 = 2.0V (Normal mode)
Input5 Low level
IN5L
T5
Low level of input terminal of MOD mode
Ratings
min
typ
Unit
max
0
0.4
V
2.0
5.0
V
0
0.4
V
2.0
5.0
V
0
0.4
V
2.0
5.0
V
T6 = 2.0V, T17 = 2.0V, T18 = 0.4V
Input5 High level
IN5H
T5
High level of input terminal of MOD mode
T6 = 2.0V, T17 = 2.0V, T18 = 0.4V
Input18 Low level
IN18L
T18
Low level of input terminal of MOD mode
T5 = 0.4V, T6 = 2.0V, T17 = 2.0V
Input18 High level
IN18H
T18
High level of input terminal of MOD mode
T5 = 0.4V, T6 = 2.0V, T17 = 2.0V
Output18 terminal
OPH18
T18
High level
DEMOD mode: FM-Signal input
4.7
V
T6 = 0.4V, T17 = 2.0V, Pull-UP:15KΩ
Output18 terminal
OPL13
Low level
OPL18
InpuT20 Low level
IN20L
T18
T18: DEMOD mode: FM No-signal
0
0.25
0.4
V
0
3
V
4.5
5.0
V
Measure the sink level of output terminal.
T6 = 0.4V, T17 = 2.0V, Pull-UP:15KΩ
T20
T20
Voltage of terminal at AGC ON
T6 = 0.4V, T17 = 2.0V
InpuT20 High level
IN20H
T20
T20
Voltage of terminal at AGC OFF
T6 = 0.4V, T17 = 2.0V
5pin AC input dynamic
range
ACIN5
16pin AC input
ACIN16
T5A
T3
Input amplitude level of FM signal
1000
mVp-p
Freq: 11.5MHz to 13.5MHz
T24A
T3
Maximum input level of T24A at Video signal
1.5
Vp-p
dynamic range
Video FM Modulation Block (MOD) T6=2.0V,T17=2.0V,T18=0.4V
Parameter
Symbol
In
OUT
Conditions
Current dissipation
ICCR
FM modulator output
level
VFM1
T3
measure the currents into pins 2 (MOD mode)
FM Mute output level
VFM2
T3
Measure the T3 output level with 2nd call
Carrier frequency
FFM
T3
Measure the output frequency on T3
Ratings
min
22.0
Measure the output level on T3 (No signal input)
Unit
typ
27.0
max
32.0
1.8
2.2
Vp-p
mVp-p
mA
It is load impedance 200Ω between T3-GND.
0
10
20
10.9
11.5
12.1
MHz
-30
-20
dB
1.9
2.0
2.1
MHz
-2
0
+2
%
with no signal input
FM output Second
THD2
T3
harmonic distortion
Deviation
Measure the second harmonics distortion
with the above condition
DEV
T24A
T3
With T24A 100% White 1Vp-p signal,
Measure the deviation on T3
FM modulator linearity
LMOD
T24A
T3
(11.5MHz to 13.5MHz)
Let f2.85, f3.35 and f3.85 be the output frequency
when 2.85V, 3.35V and 3.85V is applied to T24A
LMOD =
f3.35 - (f3.85 + f2.85) / 2
×100
f3.85 - f2.85
Emphasis gain
GEMP
T24A T20
With VIN a 300mVp-p 10kHz sine wave,
Measure the ratio of the levels on T24A and T20
-7.5
-6.0
-4.5
dB
Main linear emphasis
GME1
T24A T20
With VIN a 300mVp-p 500kHz sine wave,
Measure the ratio of the levels on T24A and T20
0.0
1.5
3.0
dB
GME2
T24A T20
With VIN a 300mVp-p 2MHz sine wave,
Measure the ratio of the levels on T24A and T20
4.0
5.5
7.0
dB
White clipping level
LWC
T24A T20
With VIN a 1.5Vp-p 100% white video signal.
Measure the white clipping level on T20
180
200
220
%
Dark clipping level
LDC
T24A T20
With VIN a 1.5Vp-p 100% white video signal.
Measure the dark clipping level on T20.
-60
-50
-40
%
FM stop beginning
delay time
TC1
T5
T3
C7 = 0.01µF, Time from fall of T5 signal to doing of
FM carrier of T3 STOP
240
300
360
µs
TC2
T5
T3
C8 = 0.001µF, Stop time of FM carrier of T3
30
40
50
µs
VDT
T5
T3
C7 = 0.01µF, Minimum VD pulse width to which
TC1B is normally output
63
characteristics(1)
Main linear emphasis
characteristics(2)
(VD characteristic 1B)
FM stop time
(VD characteristic2A)
Minimum VD pulse
width
µs
No.A1409-2/12
LA72912V
Video FM De-modulation Block (DEMOD) T6=0.4V,T17=2.0V
Parameter
Symbol
In
OUT
Conditions
typ
32.0
max
38.0
Unit
Current dissipation
ICCP
Video output level
VOUT
T5A
T3
Demodulation level, when the FM signal of 2.2MHz
deviation. Load impedance = 1kΩ T3-GND.
2.09
2.2
2.31
Vp-p
Video output level B
VOUTB
T5A
T3
Demodulation level, when the FM signal of 2.0MHz
deviation. Load impedance = 1kΩ T3-GND.
1.9
2.0
2.1
Vp-p
FM stop detection level
(DOC characteristic 1)
DOC1
T5A
T18
40
60
mVp-p
T20
T20
(Drop Delay Down)
DDD
T5A
T18
1.5
2.5
µs
T20
T20
T5A
T18
60
90
mVp-p
T20
T20
T5A
T23
0.5
1.0
1.5
V
Shift time from T5 = 0mVp-p →3 00mVp-p to
T18 ”High”
0.2
1.5
2.5
µsec
T4
Measurement of T4 DC level.
3.9
T3
DEV = 2.0MHz. Input amplitude level of FM
signal. (T5A: 11.5MHz to 13.5MHz)
FM return judgment
level
DOC2
Video DC level when
returning
DOC2B
(Drop Delay Rise)
DWR
Measure the currents into pin 2 (DEMOD mode)
Ratings
min
26.0
T20
Return operation delay
time
(In this case only, VCC make 4.5V to 5.5V.)
T5 = 11.5MHz, 300mVp-p. Measure T20 voltage
(V20). Set T20 V20 (AGC-Fix). T5 input level
when T5 amplitude is decrease gradually, and
T18 becomes "Low"
Shift time from T5 = 300mVp-p → 0mVp-p to
T18 ”Low”.
0.5
T5 = 11.5MHz, 300mVp-p, Measure T20 Voltage
(V20). Set T20 V20 (AGC-Fix). T5 inputs the level
when T5 amplitude is increase gradually, and T18
becomes "High"
Confirmation of output of Video signal from T3.
mA
Measurement of DC level.
T5A
T18
T20
T20
4V Regulator
VREG
Range of input
ACIN5
T5A
DG
DG
T5A
T3
0
6
10
%
DP
DP
T5A
T3
0
6
10
deg
Output voltage at mute
MUV
0
10
20
IRE
FM demodulation
voltage
VDEM11
0.3
0.8
1.3
V
(11.0M)
VDEM13
FM demodulation
voltage
VDEM21
0.7
1.2
1.7
V
(12.5M)
VDEM23
FM demodulation
voltage
VDEM31
T5A = 14MHz, 100mVp-p, 200mVp-p and
400mVp-p
1.1
1.6
2.1
V
VDEM32
(14.0M)
VDEM33
Each T23 voltage measurement
FM demodulation
linearity1,2,3
LDEM1
Calculate FM demodulation linearity
-2
0
+2
%
LDEM2
LDEM1 = {[VDEM21 - (VDEM11 + VDEM31) / 2]
0.28
0.33
0.38
V/MHz
481
535
589
mVp-p
Dynamic range
T3
Mute level measurement of T3
T5A
T23
T5A = 11.0MHz, 100mVp-p, 200mVp-p and
400mVp-p.
T5A
T23
T5A
T23
VDEM12
4.0
4.3
500
1000
V
mVp-p
Each T23 voltage measurement
VDEM22
T5A = 12.5MHz, 100mVp-p, 200mVp-p and
400mVp-p.
Each T23 voltage measurement
LDEM3
/ (VDEM31 - VDEM11)}×100
LDEM2 = {[VDEM22 - (VDEM12 + VDEM32) /2 ]
/ (VDEM32 - VDEM12)}×100
LDEM3 = {[VDEM23 - (VDEM13 + VDEM33) / 2]
/ (VDEM33 - VDEM13)}×100
FM demodulation
Sensitivity1,2,3
SDEM1
SDEM2
Calculate FM recovery Sensitivity with consider
pin 3 output level conversion ratio.
SDEM3
SDEM1 = (VDEM31-VDEM11)/3.0
SDEM2 = (VDEM32-VDEM12)/3.0
SDEM3 = (VDEM33-VDEM13)/3.0
Main linear de-emphasis
GMED
T5A
T23
amplitude
T5 = 200mVp-p FM signal
(fm = 10kHz, Center Carrier = 12.5MHz,
DEV = 2.0MHz) Signal level of T23
Main linear
de-emphasis
GMED1
T5A
T23
T5 = 200mVp-p FM signal (fm = 500kHz, Center
Carrier = 12.5MHz, DEV = 2.0MHz). Signal level
of T23 versus GMRD (Ratio of GMED).
-3.5
-1.5
+0.5
dB
GMED2
T5A
T23
T5 = 200mVp-p FM signal (fm = 2MHz, Center
Carrier = 9.25MHz, DEV = 2.0MHz). Signal level
of T23 versus GMRD (Ratio of GMED)
-6.5
-4.5
-2.5
dB
Characteristics(1)
Main linear
de-emphasis
Characteristics(2)
No.A1409-3/12
LA72912V
ASK Block T17=0.4V
Parameter
Current dissipation at
Symbol
In
OUT
Ratings
min
10.8
typ
13.0
max
15.5
Unit
ICCS
T17
At standby mode, measures include current to
pin2,9. T17 = 0.4V, T15 and T20:open
ICCSb
T17
At standby mode, measures include current to
pin2,9. T17 = 0.4V, T15 = 5V, T20:open
12.8
16.0
19.2
mA
At standby mode, measures include current to
pin2,9. T17 = 0.4V, T15 = 5V, T20 = 5V
16.8
21.0
25.2
mA
T6 = 2.0VDC T17 = 0V→2V (Standby release)
0.0
6.0
12.0
µs
2.0
7.0
12.0
µs
T10A = 1MHz,0/2V Pulse T11 = 20KHz,
0/2VPulse. Measure T12 signal appear time
0.1
ms
T16 = 1MHz, 300mVp-p-SIN wave
0.1
ms
100
ms
standby
Current dissipation at
Conditions
T15
standby at
mA
MOD-AGC-OFF
Current dissipation at
ICCSc
T20
DEMOD-AGC-OFF
Standby release time(1)
SASK1
(FM stop→release)
Standby release time(2)
SASK2
T3
Time until FM carrier is output to T3.
T6
T3
T5A
→release)
T17
TASK1
“transmission”
ASK Transmitting time
T6
T17
(Video signal stop
ASK Transmitting time
T17
T15
standby at
T10A T12
T11
TASK2
T16A T13
Time until white 100% signal is output to T3
Measure time T13 appear detected T16 signal
“Receive”
ASK transmission
T6 = 0.4V, T5 = DEV = 2.0MHz 100% white video
signal of FM signal. T17 = 0V → 2V (Standby
release)
WASK
setup time
T10A T12
T11
Measure T11 input interval time when T10A input
ASK minimum detect
level
VASK
T16A T13
ASK start up time
OASK
T16A T13
Measure time ASK working from Power-ON
T16A T13
T16 = T12 output signal (0-2Vp-p)
ASK demodulation
duty ratio
DASK
10
T10A = 1MHz, 0-2V-pulse T11 = 20KHz,0-2V-pulse
Measure T16 minimum level at T13 is normally
condition
0.2
3
Vp-p
-
30
300
ms
-15
-2
11
%
Measure ASK Duty difference with 50%
DASK = (pulse width µs / 50µs) - 50% × 100%
No.A1409-4/12
LA72912V
Package Dimensions
unit : mm (typ)
3175C
7.8
24
0.5
5.6
7.6
13
12
1
0.65
0.15
0.1
1.5max
0.22
(1.3)
(0.33)
SANYO : SSOP24(275mil)
Pin Assignment
24 Video input
Emphasis filter 1
De-emphasis output
VCC5V 2
23 /V-2V select
FM/Video Output 3
22 A-GND
21 De-emphasis filter
FM/VD input 5
20 FM AGC filter
MOD/DEMOD Control 6
TC1(MOD)/FMAGC
monitor Out control 7
TC2(DEMOD)/FMAGC
monitor Output 8
LA72912V
4V Regulator 4
19 B-GND
DOC-OUT
18 /2nd-Call input
17 Stand-by control
ASK-VCC5V 9
16 ASK RX input
ASK CAR IN 10
15 /AGC OFF
ASK AGC filter
ASK DATA IN 11
14 ASK DET filter
13 ASK RX Output
ASK TX Output 12
Top view
No.A1409-5/12
LA72912V
Block Diagram and Application Circuit Exanple1 Modulation (Outside camera)
Emphasis
Monitor
Video-IN
A-GND
ASK-RX OUT
Outside camera SW
ASK-AGC ASK-RX
(Hi : CAR having)
ASK-RX IN
2nd-call : Lo
Filter
Filter
VDD
Standby SW
(OFF : 4.5V)
(Lo : FM-OFF)
(Hi : FM-ON) LPF
D-GND
*1
23
24
20
21
22
19
Main De-Emph
FM-AGC-DET
FM-DEMOD/LPF
D-LIM
Clamp
17
18
Doc-DET
(Doc-LO)
16
15
14
13
*1
ASK-AGC DET
Standby
Control
ASK-AGC/ASK-RX
/Comparator
LPF
-6dB
FM-AGC(ON/OFF)
Main
Emphasis
LPF
FM-MOD
LPF
12dB-AMP
Video-Mute
MOD/DEMOD
Control
FM-Stop,Polarity
E(VD) & A(SW)
FM-stop
REG
Amp(ON/OFF)
FF
A-VCC
2
1
TC1
3
*2
5
4
ASK-TX
/Modulator
6
TC2
7
ASK-VCC
8
9
10
12
11
*2
ASK-DATA IN BPF
(Hi : CAR-OFF)
ASK-CAR IN
ASK-TX OUT
VCC(5V)
VCC(5V)
FM-OUT
MOD : Hi
VD-IN
VD : Hi DEMOD : Lo
→ 5V
*1: Open collector Output
*2: Push-Pull Output
Application Circuit Exanple2 Demodulation (Inside monitor)
FM-AGC OFF
(OFF : 4.5V)
ASK-RX OUT
ASK-AGC ASK-RX
(Hi : CAR having)
ASK-RX IN
DOC-OUT
Filter
Filter
Standby SW
VDD
(OFF : 4.5V)
(Lo : FM-OFF)
(Hi : FM-ON)
D-GND
LPF
A-GND
23
24
22
21
20
19
Main De-Emph
FM-AGC-DET
FM-DEMOD/LPF
D-LIM
Clamp
18
*1
Doc-DET
(Doc-LO)
17
16
15
14
13
*1
ASK-AGC DET
Standby
Control
LPF
-6dB
ASK-AGC/ASK-RX
/Comparator
FM-AGC(ON/OFF)
Main
Emphasis
LPF
FM-MOD
LPF
12dB-AMP
Video-Mute
MOD/DEMOD
Control
FM-Stop,Polarity
E(VD) & A(SW)
FM-stop
REG
Amp(ON/OFF)
FF
A-VCC
1
2
*2
TC1
3
VCC(5V)
Video-OUT
4
5
ASK-TX
/Modulator
6
TC2
7
ASK-VCC
8
9
10
11
12
*2
MOD : Hi
ASK-DATA IN BPF
VCC(5V)
DEMOD : Lo
: CAR-OFF)
(Hi
→
GND
FM-OUT (FM-OUT)
FM-IN
Control
ASK-CAR IN
ASK-TX OUT
(ON/OFF)
*1: Open collector Output
*2: Push-Pull Output
No.A1409-6/12
LA72912V
Pin Function
Pin No.
Pin name
FM MOD mode(Outside camera)
FM DEMOD mode(Inside Monitor)
1
Emphasis filter
Emphasis filter connection pin
Non connect(Hi-Z)
2
VCC5V
VCC for FM modulation.
VCC for FM demodulation.
3
FM/Video Output
4
5
4V Regulator
FM/VD input
FM Output
Video Output
(RO=200Ω:1.8Vp-p)
(RO=1kΩ: 2Vp-p)
Note
If you no need, this pin is open.
Push-pull output
FM modulate block and ASK bock
FM demodulate block and ASK bock
supply reference voltage.
supply reference voltage.
VD Input.
FM Input.
DEMOD mode: Set
(Hi: over 2V, Low: under 0.4V)
(Recommend Level: 100 to 620mVp-p)
3.3V by internal bias. (34kΩ/66kΩ)
(VD DET: High)
6
MOD/DEMOD Control
Set over 2V DC voltage.
Set under 0.4V DC voltage.
Outside camera /
Inside monitor setting.
7
TC1(MOD)/
Set capacitor for TC1
FMAGC monitor
FMAGC monitor out control
Can do second inside monitor
GND: Monitor ON / VCC: Monitor OFF
addition
FMAGC monitor output
Can do second inside monitor
Out control
8
TC2(DEMOD)/
Set capacitor for TC2
addition
FMAGC monitor
Output
9
ASK-VCC5V
VCC for ASK
←
10
ASK CAR IN
ASK carrier Input.
←
2.1V by internal bias. (50kΩ)
(Recommend below 3Vp-p)
11
ASK DATA IN
ASK Data Input.
←
(Hi: more than 2V, Lo: below 0.4V)
12
ASK TX Output
ASK modulated signal Output
←
13
ASK RX Output
ASK Demodulated Output
←
Push-pull output
Open collector output
ASK carrier detect = Lo
14
ASK DET filter
ASK Detector filter
←
15
ASK AGC filter
AGC filter for ASK. (When AGC
←
/AGC OFF
operate voltage is 0V to 3V, AGC stop
16
ASK RX input
ASK Demodulate Input
←
17
Standby control
FM blocks standby control. (FM block
←
when you add over 4.5V.)
3.3V by internal bias. (34kΩ/66kΩ)
operate: over 2V, FM block standby:
under 0.4V )
18
DOC-OUT
2ND-Call input, 2ND-Call: Low (High:
DOC output
DEMOD mode:
/2nd-Call input
over 2V, Low: under 0.4V)
(When DO-DET, output is Low)
Open collector output.
19
B-GND
Circuit GND
←
20
FM AGC filter
Emphasis monitor output
FM AGC control filter (AGC-ON:0 to
MOD mode: Don’t connect
3V DC, AGC-OFF:4.5V to 5V by
capacitor.
external DC voltage.)
21
De-emphasis filter
Non connect(Hi-Z)
De-emphasis filter connection pin.
22
A-GND
Circuit GND
←
23
De-emphasis output
DFF for V-diff control
DE-emphasis output
/V-2V select
(ON: over 2V, OFF: under 0.4V)
If you don’t need, this pin is open.
MOD mode;
VD diff. Count select
0V : VD through
2V : VD 1/2 diff
24
Video input
Video signal input.
Video signal input.
MOD mode: Maximum video input
(from outside CCD camera: 1Vp-p).
(from de-emphasis block: 0.5Vp-p).
level is 1.5Vp-p.
No.A1409-7/12
LA72912V
Pin Description
Pin No.
1
Pin Name
Emphasis filter
Description
Equivalent circuit
Main Emphasis filter pin.
Before FM Modulation, make emphasis characteristic
at video signal.
Emphasis time constant must be matching at de-emphasis
time constant.
2.7kΩ
620Ω
(If you don’t need the emphasis, this pin is open.)
1
R1
C1
2
VCC5V
3
FM/Video OUT
200Ω
1kΩ
VCC pin. Supply voltage is 5V DC. Please connect
de-coupling capacitor.
Push-Pull output pin.
MOD mode: FM carrier output. (1.8Vp-p: Rout=200Ω)
DEMOD mode: Video signal output. (2.0Vp-p: Rout=1kΩ)
MOD
40Ω
3
DEMOD
4
Regulator filter
40Ω
Internal regulator filter pin.
Please connect 0.1µF (C1).
4
23kΩ
C1
10kΩ
5
FM/VD input
50kΩ
DEMOD mode: FM signal input.
Please consider input impedance.
MOD/DEMOD Control
200Ω
66kΩ
1kΩ
VD Sig
6
20µA
C1
5
directory.
200Ω
FM Sig
MOD mode: VD signal input. Please input VD signal
80µA
coupling.
34kΩ
Internal DC bias is 3.3V. Please use capacitor (C1)
MOD mode / DEMOD mode setting pin.
MOD mode: Please set over 2V DC voltage. (2 to 5V).
DEMOD mode: Please set under 0.4V DC voltage. (0 to
30µA
0.4V).
1kΩ
6
7
TC1(MOD)/
MOD mode: TC1 filter pin. Please connect C1.
FMAGC monitor
DEMOD mode: FM-AGC monitor on/off control.
Control
GND: AGC-monitor ON
60µA
VCC: AGC-monitor OFF
20µA
2kΩ
7
C1
200Ω
1kΩ
1kΩ
30µA
Continued on next page.
No.A1409-8/12
LA72912V
Continued from preceding page.
Pin No.
8
Pin Name
Description
TC2(DEMOD)/
MOD mode: TC2 filter pin. Please connect C1.
FMAGC monitor
DEMOD mode: FM-AGC-monitor output
Equivalent circuit
Output
60µA
2kΩ
8
200Ω
1kΩ
C1
30µA
9
ASK-VCC5V
ASK block VCC. Please supply DC 5V with use capacitor
for de-coupling.
10
ASK CAR IN
ASK carrier input Pin.
Please connect with capacitor, 2.1V by internal biased.
ASK carrier
Max
3.0Vp-p
1kΩ
10
C1
50kΩ
2.1V
11
ASK DATA IN
ASK data input pin.
L level is lower than 0.4V
H level is more than 2V
30µA
ASK data
10kΩ
30kΩ
11
12
ASK TX Output
ASK output pin.
Push-pull type output.
40Ω
12
40Ω
13
ASK RX Output
ASK detect output.
Open corrector type output.
13
300Ω
14
ASK DET filter
ASK detect filter.
SIG
Connect capacitor for reject of ASK AC component.
50kΩ
50kΩ
14
C1
300Ω
60µA
Continued on next page.
No.A1409-9/12
LA72912V
Continued from preceding page.
Pin No.
15
Pin Name
Description
ASK AGC filter
AGC filter pin for ASK.
/AGC OFF
Please connect pull-up resistance to this pin, and do
Equivalent circuit
AGC-DET
more than 4.5V at voltage of this pin.
100kΩ
15
10kΩ
500Ω
C1
16
ASK RX input
60µA
10kΩ
ASK input pin.
Please connect with capacitor, 3.3V by internal biased.
34kΩ
ASK signal
200Ω
C1
16
300Ω
66kΩ
17
Standby control
80µA
Standby control pin.
FM block standby: under 0.4V DC voltage. (0 to 0.4V)
FM block operate: over 2V DC voltage. (2 to 5V)
30µA
1kΩ
17
18
DOC-OUT
DEMOD mode: Drop-out output pin.
/2nd-Call input
This pin is open collector output, so please connect pull
up resistor.
30µA
MOD mode: 2ND-CALL input.
2ND-CALL input: under 0.4V DC voltage. (0 to 0.4V)
1kΩ
18
Normal: over 2V DC voltage. (2 to 5V)
19
B-GND
20
FM AGC filter
300Ω
Circuit GND.
MOD mode: Emphasis monitor pin.
AGC-DET
DEMOD mode: FM AGC filter pin.
EMP
If FM AGC no need ( = AGC Off),
100kΩ
Please set pin 12 voltage over 4.5V DC voltage. (4.5 to
5V)
20
10kΩ
21
De-emphasis filter
10kΩ
500Ω
C1
60µA
DEMOD mode: De-emphasis filter pin.
SIG
De-emphasis time constant must be matching at
emphasis time constant.
300µA
(If you don’t need the emphasis, this pin is open.)
22
A-GND
2.5kΩ
C1
4.7kΩ
21
R1
Circuit GND.
Continued on next page.
No.A1409-10/12
LA72912V
Continued from preceding page.
Pin No.
23
Pin Name
Description
De-emphasis output
DEMOD mode: Video signal output after De-emphasis.
/V-2V select
Output level is 0.5Vp-p.
Connect capacitor to clamp input (pin 16).
Equivalent circuit
MOD : DC IN
200Ω
MOD mode: DFF control pin. DFF is ON at over 2V DC
SIG
voltage. (2 to 5V)
DEMOD
Video input
C1
1mA
MOD mode: Video signal input pin (from camera).
Clamp
Input level is 1Vp-p.
DEMOD mode: Video signal input pin (from
de-emphasis).
Input level is 0.5Vp-p.
15kΩ
24
23
Video input
MOD : 1Vp-p
DEMOD : 0.5Vp-p
24
C1
200Ω
500Ω
200µA
No.A1409-11/12
LA72912V
Test Circuit
47pF
BNC
T1
2.2kΩ
Current measure
A
B
180Ω
T2
10µF
+
T4
1kΩ
GND
1 Emphasis filter
T3
SW3
T5
BNC
T5A
1µF
+
A
B SW5
Mode select
switch
T6
T7
0.01µF
T8
Total current measure
Power supply
VCC=5V
Current measure
0.001µF
T10
BNC
T10A
0.1µF
T24
T11
T12
2 VCC5V
Video input 24
3 FM/Video Output
A-GND 22
4 4V Regulator
De-emphasis filter 21
5 FM/VD input
FM AGC filter 20
6 MOD/DEMOD Control
7 TC1(MOD)/FMAGC
monitor Out control
8 TC2(DEMOD)/FMAGC
monitor Output
B-GND 19
DOC-OUT
/2nd-Call input 18
Stand-by control 17
9 ASK-VCC5V
ASK RX input 16
10 ASK CAR IN
ASK AGC filter
/AGC OFF 15
11 ASK DATA IN
ASK DET filter 14
12 ASK TX Output
T23
De-emphasis output
/V-2V select 23
10µF
+
A
SW24
+ B
1µF
T21
T20
T18
T24A
BNC
75Ω
27pF
4.7kΩ
A
SW20
+ B
1µF
Pull
up
15kΩ
T17
T16
T16A
T15
+
T14
1µF
T10
0.1µF
Pull
up
15kΩ
ASK RX Output 13
SANYO Semiconductor Co.,Ltd. assumes no responsibility for equipment failures that result from using
products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition
ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd.
products described or contained herein.
SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all
semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or
malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise
to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt
safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not
limited to protective circuits and error prevention circuits for safe design, redundant design, and structural
design.
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No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
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Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the
SANYO Semiconductor Co.,Ltd. product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed
for volume production.
Upon using the technical information or products described herein, neither warranty nor license shall be granted
with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third
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intellctual property rights which has resulted from the use of the technical information and products mentioned
above.
This catalog provides information as of February, 2009. Specifications and information herein are subject
to change without notice.
PS No.A1409-12/12