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LA72910V_09 Datasheet(PDF) 3 Page - Sanyo Semicon Device

Part No. LA72910V_09
Description  FM Modulator and Demodulator IC
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Maker  SANYO [Sanyo Semicon Device]
Homepage  http://www.ssdc-jp.com/eng/
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LA72910V
No.A0783-3/10
Video FM De-modulation Block (DEMOD) T6=0.4V,T9=2.0V
Ratings
Parameter
Symbol
In
OUT
Conditions
min
typ
max
Unit
Current dissipation
ICCP
Measure the currents into pin 2 (DEMOD mode)
24.0
28.0
32.0
mA
Video output level
VOUT
T5A
T3
Demodulation level, when the FM signal of
2.2MHz deviation. Load impedance = 1k
T3-GND.
2.09
2.2
2.31
Vpp
Video output level B
VOUTB
T5A
T3
Demodulation level, when the FM signal of
2.0MHz deviation. Load impedance = 1k
T3-GND.
In this case only, VCC make 4.5V to 5.5V.
1.9
2.0
2.1
Vpp
FM stop detection level
(DOC characteristic 1)
DOC1
T5A
T12
T10
T12
T5 = 11.5MHz, 300mVp-p. Measure T12 voltage
(V12). Set T12 V12 (AGC-Fix). T5 input level
when T5 amplitude is decrease gradually, and
T10 becomes "Low"
40
60
mVp-p
(Drop Delay Down)
DDD
T5A
T12
T10
T12
Shift time from T5=300mVp-p→0mVp-p to
T10”Low”.
0.5
1.5
2.5
µsec
FM return judgment
level
DOC2
T5A
T12
T10
T12
T5=11.5MHz, 300mVpp, Measure T12 Voltage
(V12). Set T12 V12 (AGC-Fix). T5 inputs the level
when T5 amplitude is increase gradually, and T10
becomes "High"
60
90
mVp-p
Video DC level when
returning
DOC2B
T5A
T12
T15
Confirmation of output of Video signal from T3.
Measurement of DC level.
0.5
1.0
1.5
V
(Drop Delay Rise)
Return operation delay
time
DWR
T5A
T12
T10
T12
Shift time from T5 = 0mVp-p
→300mVp-p to
T10”High”
0.2
1.5
2.5
µsec
4V Regulator
VREG
T4
Measurement of T4 DC level.
3.9
4.0
4.3
V
Range of input
Dynamic range
ACIN5
T5A
T3
DEV = 2.0MHz. Input amplitude level of FM
signal. (T5A: 11.5MHz to 13.5MHz)
500
1000
mVp-p
DG
DG
T5A
T3
0
6
10
%
DP
DP
T5A
T3
0
6
10
deg
Output voltage at mute
MUV
T3
Mute level measurement of T3
0
10
20
IRE
FM demodulation
voltage
(11.0M)
VDEM11
VDEM12
VDEM13
T5A
T15
T5A = 11MHz, 100mVp-p, 200mVp-p and
400mVp-p.
Each T15 voltage measurement
0.3
0.8
1.3
V
FM demodulation
voltage
(12.5M)
VDEM21
VDEM22
VDEM23
T5A
T15
T5A = 12.5MHz, 100mVp-p, 200mVp-p and
400mVp-p.
Each T15 voltage measurement
0.7
1.2
1.7
V
FM demodulation
voltage
(14.0M)
VDEM31
VDEM32
VDEM33
T5A
T15
T5A = 14MHz, 100mVp-p, 200mVp-p and
400mVp-p
Each T15 voltage measurement
1.1
1.6
2.1
V
FM demodulation
linearity1.2.3
LDEM1
LDEM2
LDEM3
Calculate FM demodulation linearity
LDEM1 = {[VDEM21 - (VDEM11 + VDEM31) / 2]
/ (VDEM31 - VDEM11)}
×100
LDEM2 = {[VDEM22 - (VDEM12 + VDEM32) /2 ]
/ (VDEM32 - VDEM12)}
×100
LDEM3 = {[VDEM23 - (VDEM13 + VDEM33) / 2]
/ (VDEM33 - VDEM13)}
×100
-2
0
+2
%
FM demodulation
Sensitivity1.2.3
SDEM1
SDEM2
SDEM3
Calculate FM recovery Sensitivity with consider
pin3 output level conversion ratio.
SDEM1 = (VDEM31-VDEM11)/2.5
SDEM2 = (VDEM32-VDEM12)/2.5
SDEM3 = (VDEM33-VDEM13)/2.5
0.28
0.33
0.38
V/MHz
Main linear
de-emphasis
amplitude
GMED
T5A
T15
T5=200mVp-p FM signal
(fm = 10kHz,Center Carrier = 12.5MHz,
DEV = 1.0MHz) Signal level of T15
243
270
297
mVp-p
Main linear
de-emphasis
Characteristics(1)
GMED1
T5A
T15
T5 = 200mVp-p FM signal (fm = 500kHz, Center
Carrier = 12.5MHz, DEV = 1.5MHz). Signal level
of T15 versus GMRD (Ratio of GMED).
-8.0
-6.0
-4.0
dB
Main linear
de-emphasis
Characteristics(2)
GMED2
T5A
T15
T5 = 200mVp-p FM signal (fm = 2MHz, Center
Carrier = 9.25MHz, DEV = 1.5MHz). Signal level
of T15 versus GMRD (Ratio of GMED)
-11.0
-9.0
-7.0
dB




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