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参数资料
| 型号： | LA7191N |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP42 |
| 封装： | SDIP-42 |
| 文件页数： | 6/11页 |
| 文件大小： | 158K |
| 代理商： | LA7191N |
Continued from preceding page.
Parameter
Symbol
Input Output
Conditions
min
typ
max
Unit
FM demodulation linearity
LDEM
LDEM =
V
DEM4 – (VDEM6 +V DEM2)/2
VDEM6 – VDEM2
x 100
–3.5
0
+3.5
%
Carrier leak
CL
T39A
T3
VIN = 300 mVp-p,f=4MHz
Ratio between 4 MHz component of T3 and
SDEM
–40
–35
dB
PB YNR characteristics
LP/EP
GP-YNR
T4A
T28A VIN = white 50% + CW (15.8 mVp-p)
Ratio between 32fH component and 32.5fH
component
–11
–9
–7dB
PB LNC characteristics
SP
GP-LNC
T4A
T28A VIN = white 50% + CW (15.8 mVp-p)
Ratio between 32fH component and 32.5fH
component
–7.0
–5.5
–4.0
dB
Playback through gain
GPB
T4A
T34A Apply VIN = 0.5 Vp-p video signal to pin 4,
and determine ratio between T34A output
level and input level
4.0
5.5
7.0
dB
Nonlinear de-emphasis
characteristics
GNLDEEM1 T4A
T34A VIN = white 50% + CW
(f = 1 MHz, 158 mVp-p)
measure input/output response, difference
with GPB
–2.8
–1.8
–0.8
dB
GNLDEEM2 T4A
T34A f = 1 MHz, 50 mVp-p
–5.0
–4.0
–3.0
dB
Noise canceller
characteristics
GWNC1
T4A
T34A f = 1.5 MHz, 158 mVp-p
–1.3
–0.8
–0.3
dB
GWNC2
T4A
T34A f = 1.5 MHz, 50 mVp-p
–4.5
–3.5
–2.5
dB
GWNC3
T4A
T34A f = 1.5 MHz, 15.8 mVp-p
–10.5
–9.0
–7.5
dB
PIC-CTL center response
characteristics
GPC
T4A
T34A f = 2 MHz, 158 mVp-p
1.2
1.7
2.2
dB
PIC-CTL hard response
characteristics
GPH
T4A
T34A f = 2 MHz, 158 mVp-p
7.0
8.0
10.0
dB
PIC-CTL soft response
characteristics
GPS
T4A
T34A f = 2 MHz, 158 mVp-p
–10.0
–8.0
–7.0
dB
Nonlinear de-emphasis
characteristics SP
NLDE-SP
T4A
T34A Same as GNLDEEM2
–5.0
–4.0
–3.0
dB
Sync tip level,
pedestal level,
white level measurement
(PB)
LVOR
T4A
T34
With VIN = white 100% and T34A at 1.0
Vp-p, measure electric potential for each of
the pin 34 video output sync tip, pedestal,
and white peak, and assign the measured
values to LSYN,LPED, and LWHI, respectively
Pseudo V insertion level
(PB)
VDP
T4A
T34
Measure pin 34 DC voltage when5Vis
applied to pin 33, and assign the measured
value to LVDP, and calculate the difference
with LSYN
VDP = LSYN – LVDP
–80
0
+80
mV
Pseudo H insertion level
(PB)
HDP
T4A
T34
Measure pin 34 DC voltage when 2.7 V is
applied to pin 33, and assign the measured
value to LHDP, and calculate the difference
with LPED
HDP = LPED – LHDP
–300
–200
–100
mV
White insertion level (PB)
WHP
T4A
T34
Measure pin 34 DC voltage when 1.3 V is
applied to pin 33, and assign the measured
value to LWHP, and calculate the difference
with LWHI
WHP = LWHI – LWHP
20
120
220
mV
Sync separation output level
VSYP
T4A
T32
VIN = 0.5 Vp-p video signal, pin 32 output
pulse wave high value
4.0
4.2
4.4
Vp-p
Sync separation output
pulse width
PWSYP
T4A
T32
VIN = 0.5 Vp-p video signal, T32 output pulse
width
4.4
4.7
5.0
s
Sync separation output
leading edge delay time
TSYP
T4A
T32
VIN = 0.5 Vp-p video signal, measure delay
time of output SYNC versus input SYNC
0.9
1.1
1.3
s
4.2 V regulator operation
check
VREG
T30
Measure DC level of T30 in REC mode
3.95
4.15
4.35
VDC
[REC Mode Chroma]
REC chroma low-band
conversion output level
VOR-15
T37A T15A VIN = standard color bar signal (1 Vp-p),
measure burst level at T15A
120
160
200
mVp-p
Burst emphasis amount
(NTSC mode)
GBE
T37A T15A VIN = standard color bar signal (1 Vp-p)
Ratio of burst level at T15A when S41A is off
(SP/EP) and on (LP)
5.5
6.0
6.5
dB
Continued on next page.
LA7191N
No.5471-4/11
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