Datasheet

AD725–SPECIFICATIONS
REV. 0
–2–
(Unless otherwise noted, V
S
= +5, T
A
= +258C, using 4FSC synchronous clock. All loads are
150 V 6 5% at the IC pins. Outputs are measured at the 75 V reverse terminated load.)
Parameter Conditions Min Typ Max Units
SIGNAL INPUTS (RIN, GIN, BIN)
Input Amplitude Full Scale 714 mV p-p
Black Level
1
0.8 V
Input Resistance
2
RIN, GIN, BIN 1 MΩ
Input Capacitance 5pF
LOGIC INPUTS (HSYNC, VSYNC, 4FSC, CE, STND) TTL Logic Levels
Logic Low Input Voltage 1V
Logic High Input Voltage 2V
Logic Low Input Current (DC) 1 µA
Logic High Input Current (DC) 1 µA
VIDEO OUTPUTS
3
Luminance (LUMA)
Bandwidth, –3 dB NTSC 4.4 MHz
PAL 5.2 MHz
Gain Error –7 –2 +7 %
Nonlinearity max p-p 0.3 %
Sync Level NTSC 252 279 310 mV
PAL 264 291 325 mV
DC Black Level 1.3 V
Luminance Trap (YTRAP)
Output Resistance 1.0 kΩ
DC Black Level 1.0 V
Chrominance (CRMA)
Bandwidth, –3 dB NTSC 1.2 MHz
PAL 1.5 MHz
Color Burst Amplitude NTSC 206 255 305 mV p-p
PAL 221 291 362 mV p-p
Color Burst Width NTSC 2.51 µs
PAL 2.28 µs
Chroma Level Error
4
–4 %
Chroma Phase Error
5
±3 Degrees
DC Black Level 2.0 V
Chroma Feedthrough R, G, B = 0 15 40 mV p-p
Composite (COMP)
Absolute Gain Error With Respect to Luma –5 –1 +3 %
Differential Gain With Respect to Chroma 0.5 %
Differential Phase With Respect to Chroma 1.5 Degrees
DC Black Level 1.4 V
Chroma/Luma Time Alignment S-Video 20 ns
POWER SUPPLIES
Recommended Supply Range Single Supply +4.75 +5.25 V
Quiescent Current—Encode Mode 30 36 mA
Quiescent Current—Power Down <1 µA
NOTES
1
R, G, and B signals are inputted via an external ac coupling capacitor.
2
Except during dc restore period (back porch clamp).
3
All outputs measured at a 75 Ω reverse-terminated load; ac voltages at the IC output pins are twice those specified here.
4
Difference between ideal and actual color bar subcarrier amplitudes.
5
Difference between ideal and actual color bar subcarrier phases.
Specifications are subject to change without notice.