參數(shù)資料
型號: TDA9808T-T
廠商: NXP SEMICONDUCTORS
元件分類: 接收器
英文描述: AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO20
文件頁數(shù): 18/35頁
文件大小: 170K
代理商: TDA9808T-T
TA1317AN
2002-09-06
25
Test Condition
SW Mode
Note
No.
Parameter
SW5
SW6
SW7
SW8
SW10
SW11
SW17
SW24
Test Method
(unless otherwise specified, VCC = 9 V, Ta = 25 ± 3°C, data = preset values)
3
Vertical ramp wave amplitude
OFF
B
ON
OFF
B
ON
A
(1) Input vertical trigger pulse to pin VIN.
Pulse level (VT)
= 3.0 V
(2) Measure pin 23 (V-RAMP FILTER) amplitude VRMP as shown in the figure below.
4
Vertical drive amplification
OFF
C
ON
OFF
B
ON
A
(1) No signal input to pin VIN.
(2) Set VD (V-DRIVE mode switch) (sub-address: 00) to AC-Coupling mode (data: 81).
(3) Connect external power supply (V6) to TP6 (V fb).
(4) Change external power supply (V6) until pin 4 (V DRIVE) voltage is 0.8 V.
The voltage is made V6A.
(5) Measure pin 4 voltage (V4A) when the external power supply voltage is V6A + 0.2 V.
(6) Calculate the drive amplification (GV) using the following formula.
V4A 0.8
GV
= 20 og
0.2
VRMP
Pin 23
(V-RAMP FILTER) waveform
P
in
4
(V
DR
IV
E
)vol
tage
(V
4
)
Pin 6 (V NF) external supply voltage (V6)
V4H
V4L
V4A
0.8 V
V6A
V6A + 0.2 V
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