cxa3516r Sony Electronics, cxa3516r Datasheet - Page 95

• Manufacturer Part Number: cxa3516r
• Description: 3-channel 8-bit 165msps A/d Converter Amplifier Pll
• Manufacturer: Sony Electronics

Notes on Operation
• On the PC board, prepare a solid ground pattern having as large an area as possible, and placing the IC in
• The loop filter area of the PLL block plays an important role in terms of performance. It is therefore located as
• Be sure to use a metal film resistor for the resistor connected to IREF (Pin 121).
• The wiring for SYNCIN1 (Pin 111) and SYNCIN2 (Pin 112) should be as short as possible and each needs to
• Use a 0.1µF ceramic chip capacitor for the bypass capacitor attached between the power supply and ground.
• Use a 1µF ceramic chip capacitor for the capacitor attached to the VRT (Pin 17) and the VRB (Pin 93) and
• Equalize and shorten the lines of RGB analog input signals, if possible. Each line needs to be shielded by
• A 0.1µF capacitor is recommended for attachment to the RGB analog input pins. The less the capacitance
• Design boards so that the wiring for the R/CrIN, G/YIN, and B/CbIN and R/CrOUT, G/YOUT, B/CbOUT pins
• Use a pattern width that takes characteristic impedance into account for signal wires terminated at 75 .
• There are no particular restrictions on the power-on sequence.
• Although there are AV
• AGNDAD3 and DGNDAD3 are the ground for AV
• Although 5V power supply is divided into both analog and digital power supply lines, be sure to wire boards
• Load capacitance of the data output wires causes the change for the worse of slew rate and noise. Be sure
• Put this IC into power save mode when making a connection between data output and another IC. (High
the center, divide this area into an analog region and digital region.
close as possible to the IC pins and the periphery is guarded with AGND. Also, be sure to use capacitors and
resistors for the loop filter that should be temperature compensated and do not change the values.
be shielded by ground.
The capacitor should be attached to the pin as close as possible.
connect to the AV
ground. (This is the same for the R/CrCLP, G/YCLP, and B/CbCLP pins.)
becomes, the more the sag by leak current becomes. The more the capacitance becomes, the more start up
time takes in case of putting power souce into the IC. (This is the same for the R/CrCLP, G/YCLP, and
B/CbCLP pins.)
is as separated as possible.
to each on the board.
for AGNDAD3 and DGNDAD3. Although AGND is the ground recommended for AGNDAD3 and DGNDAD3,
there are no problems in terms of operation even if connected to DGND. (The special evaluation board in the
Application Circuit is connected to DGND.)
so that no potential difference arises between these power supplies.
to use short layouts with the finest wires possible.
impedance cannot be set when pins are disabled separately.)
CC
AD3 (Pin 16 and Pin 94) as close as possible.
CC
AD3 and DV
CC
AD3 as 3.3V power supply, use the same 3.3V analog power supply
CC
– 95 –
AD3 and DV
CC
AD3, respectively. Use the same ground
CXA3516R