TA1310ANG Datasheet, PDF (37/106 Pages) Toshiba Semiconductor – NTSC VIDEO, CHROMA, DEFLECTION, AND DISTORTION COMPENSATION IC (WITH YUV INTERFACE AND ACB)

TA1310ANG
NOTE
ITEM
SW MODE
SW₅₄ SW₅₅ SW₅₆
1)
2)
3)
(TEST CONDITIONS V_CC = 9 V / 5 V, Ta = 25 ± 3°C)
MEASUREMENT METHOD
Set the bus control data to the preset value.
Set SW₅₄ to C (connect the Y input to AC-GND), set SW₅₅ to A (maximum gain), turn the Y mute off (0), and turn
the black level compensation on (set the black stretch start point to 000).
Observe #56, measure ∆V, and calculate the following formula.
B_LC [(IRE)] = (∆V [mV] ÷ (0.7 × 10³) [mV]) × 100 [(IRE)]
P₁₀ Black Level Compensation C
A OPEN
P₁₁ Black Peak Detection Level C
1) Set the bus control data to the preset value.
2) Turn the Y mute off (0) and connect #54 to an external power supply (PS).
3) Turn the black level correction on (set the black stretch start point to 000).
C OPEN
4) Increase the PS from 3V and measure the voltage VBP of #56 where the DC level of the picture period of #55
shifts from high to low.
5) Calculate ∆VBP from the following formula.
∆VBP = VBP − V₅₆
Note 1: When testing, see the picture sharpness test circuit diagram. First turn ACB mode off (bus control).
Note 2: Ensure the composite signal is always input to pin 38 (SYNC IN).
37
2005-09-20