ad725-eb Analog Devices, Inc., ad725-eb Datasheet - Page 2

• Manufacturer Part Number: ad725-eb
• Description: Low Cost Rgb To Ntsc/pal Encoder With Luma Trap Port
• Manufacturer: Analog Devices, Inc.

AD725–SPECIFICATIONS
Parameter
SIGNAL INPUTS (RIN, GIN, BIN)
LOGIC INPUTS (HSYNC, VSYNC, 4FSC, CE, STND)
VIDEO OUTPUTS
POWER SUPPLIES
NOTES
1
2
3
4
5
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
Difference between ideal and actual color bar subcarrier amplitudes.
Difference between ideal and actual color bar subcarrier phases.
Input Amplitude
Black Level
Input Resistance
Input Capacitance
Logic Low Input Voltage
Logic High Input Voltage
Logic Low Input Current (DC)
Logic High Input Current (DC)
Luminance (LUMA)
Luminance Trap (YTRAP)
Chrominance (CRMA)
Composite (COMP)
Chroma/Luma Time Alignment
Recommended Supply Range
Quiescent Current—Encode Mode
Quiescent Current—Power Down
Bandwidth, –3 dB
Gain Error
Nonlinearity
Sync Level
DC Black Level
Output Resistance
DC Black Level
Bandwidth, –3 dB
Color Burst Amplitude
Color Burst Width
Chroma Level Error
Chroma Phase Error
DC Black Level
Chroma Feedthrough
Absolute Gain Error
Differential Gain
Differential Phase
DC Black Level
1
2
3
4
5
reverse-terminated load; ac voltages at the IC output pins are twice those specified here.
(Unless otherwise noted, V
150
5% at the IC pins. Outputs are measured at the 75
–2–
Conditions
Full Scale
RIN, GIN, BIN
TTL Logic Levels
NTSC
PAL
max p-p
NTSC
PAL
NTSC
PAL
NTSC
PAL
NTSC
PAL
R, G, B = 0
With Respect to Luma
With Respect to Chroma
With Respect to Chroma
S-Video
Single Supply
S
= +5, T
A
= +25 C, using 4FSC synchronous clock. All loads are
Min
1
2
–7
252
264
206
221
–5
+4.75
Typ
0.8
5
5.2
–2
0.3
279
291
1.3
1.0
1.0
1.5
291
2.28
–4
2.0
15
–1
0.5
1.5
1.4
30
<1
4.4
1.2
255
2.51
20
reverse terminated load.)
3
Max
714
1
1
1
+7
310
325
305
362
40
+3
+5.25 V
36
mV p-p
%
%
mV
mV p-p
%
Units
V
M
pF
V
V
MHz
MHz
mV
V
k
V
MHz
MHz
mV p-p
%
Degrees
V
mV p-p
%
Degrees
V
ns
mA
A
A
s
s
A
REV. 0