ADV7123
Pin No.
37
Mnemonic
R
SET
Description
A resistor (R
SET
) connected between this pin and GND controls the magnitude of the full-scale video signal.
Note that the IRE relationships are maintained, regardless of the full-scale output current. For nominal video
levels into a doubly terminated 75 Ω load, R
SET
= 530 Ω. The relationship between R
SET
and the full-scale
output current on IOG (assuming I
SYNC
is connected to IOG) is given by:
R
SET
(Ω) = 11,445 ×
V
REF
(V)/IOG (mA)
The relationship between R
SET
and the full-scale output current on IOR, IOG, and IOB is given by:
IOG
(mA) = 11,445 ×
V
REF
(V)/R
SET
(Ω) (SYNC being asserted)
IOR, IOB
(mA) = 7989.6 ×
V
REF
(V)/R
SET
(Ω)
The equation for IOG is the same as that for IOR and IOB when SYNC is not being used, that is, SYNC tied
permanently low.
Power Save Control Pin. Reduced power consumption is available on the ADV7123 when this pin is active.
38
PSAVE
Rev. D | Page 11 of 24
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