ad722jr-16-reel7 Analog Devices, Inc., ad722jr-16-reel7 Datasheet - Page 4

• Manufacturer Part Number: ad722jr-16-reel7
• Description: Ntsc/pal Encoder
• Manufacturer: Analog Devices, Inc.

AD722
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
*The Luminance, Chrominance, and Composite Outputs are at twice normal levels for driving 75
Mnemonic
STND
AGND
FIN
APOS
ENCD
RIN
GIN
BIN
CRMA
COMP
LUMA
SELECT
DGND
DPOS
VSYNC
HSYNC
12
15
16
3
1
5
APOS
DPOS
Circuit A
Description
A Logical HIGH input selects NTSC encoding.
A Logical LOW input selects PAL encoding.
CMOS Logic Levels.
Analog Ground Connection.
FSC clock or parallel-resonant crystal, or 4FSC clock input.
For NTSC: 3.579 545 MHz or 14.318 180 MHz.
For PAL: 4.433 619 MHz or 17.734 480 MHz.
CMOS Logic Levels for subcarrier clocks.
Analog Positive Supply (+5 V
A Logical HIGH input enables the encode function.
A Logical LOW input powers down chip when not in use.
CMOS Logic Levels.
Red Component Video Input.
0 to 714 mV for NTSC; 0 to 700 mV for PAL.
Green Component Video Input.
0 to 714 mV for NTSC.
0 to 700 mV for PAL.
Blue Component Video Input.
0 to 714 mV for NTSC.
0 to 700 mV for PAL.
Chrominance Output (Subcarrier Only).*
Approximately 1.8 V peak-to-peak for both NTSC and PAL.
Composite Video Output.*
Approximately 2.5 V peak-to-peak for both NTSC and PAL.
Luminance plus SYNC Output.*
Approximately 2 V peak-to-peak for both NTSC and PAL.
A Logical LOW input selects the FSC operating mode.
A Logical HIGH input selects the 4FSC operating mode.
CMOS Logic Levels.
Digital Ground Connections.
Digital Positive Supply (+5 V
Vertical Sync Signal (if using external CSYNC set at +5 V).
Horizontal Sync Signal (or CSYNC signal).
Circuit B
V
BIAS
PIN DESCRIPTIONS
Equivalent Circuits
–4–
5%) .
5%).
6
7
8
10
11
APOS
9
APOS
reverse-terminated lines.
Circuit D
Circuit C
TYP
4pF
V
CLAMP
Equivalent Circuit
Circuit A
Circuit B
Circuit A
Circuit C
Circuit C
Circuit C
Circuit D
Circuit D
Circuit D
Circuit A
Circuit A
Circuit A
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