TA1276AFG Datasheet, PDF (60/83 Pages) Toshiba Semiconductor – PAL/NTSC Video Chroma And Deflection IC For CTV

Note
Parameter
T₃₁ OSD ACL Characteristics
TA1276AFG
Test Conditions (unless otherwise stated, V_CC1 = 5 V, V_CC2/V_CC3/DEF V_CC = 9 V, Ta = 25 ± 3°C)
Switching Mode
SW₃₃ SW₃₄ SW₃₅ SW₃₇ SW₃₈ SW₃₉ SW₅₁ SW₅₂ SW₅₃
Test Conditions
1) Repeat step 1) of T₂₇.
Set the subaddress (10) data to (02).
2) Apply 5 V from an external power supply to pin 21.
3) Input signal 1 (f₀ = 100 kHz, picture period amplitude = 0.2 V_p-p) to pin 18.
4) Measure the picture period amplitude of pin 11. (v_OSDACL1)
5) Measure the picture period amplitude of pin 11 when −0.5 V DC is applied
A
A
A
A
A
B
B
B
A
to pin 8 from an external source. (v_OSDACL2)
6) Measure the picture period amplitude of pin 11 when −1 V DC is applied to
pin 8 from an external source. (v_OSDACL3)
7) OSDACL1 = −20 × Ɛog (v_OSDACL2/v_OSDACL1)
OSDACL2 = −20 × Ɛog (v_OSDACL3/v_OSDACL1)
8) Change the subaddress (10) data to (00) and repeat the measurements in
steps 1) to 7). (OSDACL3, OSDACL4)
60
2002-04-01