AD724 Analog Devices, AD724 Datasheet - Page 2

• Manufacturer Part Number: AD724
• Description: RGB to NTSC/PAL Encoder
• Manufacturer: Analog Devices

AD724–SPECIFICATIONS
Parameter
SIGNAL INPUTS (RIN, GIN, BIN)
LOGIC INPUTS (HSYNC, VSYNC, FIN, ENCD, STND, SELECT) CMOS Logic Levels
VIDEO OUTPUTS
POWER SUPPLIES
NOTES
1
2
3
4
5
6
Specifications are subject to change without notice.
R, G, and B signals are inputted via an external ac coupling capacitor.
Except during dc restore period (back porch clamp).
All outputs measured at a 75
Ratio of chroma amplitude to burst amplitude, difference from ideal.
Difference between ideal color-bar phases and the actual values.
Driving the logic inputs with VOH < 4 V will increase static supply current approximately 150 A per input.
Input Amplitude
Black Level
Input Resistance
Input Capacitance
Logic LO Input Voltage
Logic HI Input Voltage
Logic LO Input Current (DC)
Logic HI Input Current (DC)
Luminance (LUMA)
Chrominance (CRMA)
Composite (COMP)
Chroma/Luma Time Alignment
Recommended Supply Range
Quiescent Current—Encode Mode
Quiescent Current—Power Down
Roll-Off @ 5 MHz
Gain Error
Nonlinearity
Sync Level
DC Black Level
Bandwidth
Color Burst Amplitude
Color Signal to Burst Ratio Error
Color Burst Width
Phase Error
DC Black Level
Chroma Feedthrough
Absolute Gain Error
Differential Gain
Differential Phase
DC Black Level
1
5
2
3
reverse-terminated load; ac voltages at the IC output pins are twice those specified here.
6
4
(Unless otherwise noted, V
150
5% at the IC pins. Outputs are measured at the 75
–2–
Conditions
Full Scale
RIN, GIN, BIN
NTSC
PAL
NTSC
PAL
NTSC
PAL
NTSC
PAL
NTSC
PAL
R, G, B = 0
With Respect to Luma
With Respect to Chroma
With Respect to Chroma
Single Supply
S
= +5, T
A
= +25 C, using FSC synchronous clock. All loads are
Min
1
2
–15
243
170
–5
+4.75
Typ
0.8
5
<1
<1
–7
–6
–3
286
300
1.3
3.6
4.4
249
288
2.51
2.28
2.0
15
0.5
2.0
1.5
0
33
1
0.3
5
3
1
reverse terminated load.)
Max
714
1
+15
329
330
40
5
+5.25
42
Units
mV p-p
V
M
pF
V
V
dB
dB
%
%
mV
mV
V
MHz
MHz
mV p-p
mV
%
Degrees
V
mV p-p
%
%
Degrees
V
ns
V
mA
mA
A
A
s
s
REV. B