AD9229 Analog Devices, AD9229 Datasheet - Page 23

• Manufacturer Part Number: AD9229
• Description: Quad 12-Bit, 50/65 MSPS, Serial LVDS A/D Converter
• Manufacturer: Analog Devices

Specifications of AD9229

• Resolution (bits): 12bit
• # Chan: 4
• Sample Rate: 65MSPS
• Interface: Ser
• Analog Input Type: Diff-Uni
• Ain Range: 1 V p-p,2 V p-p
• Adc Architecture: Pipelined
• Pkg Type: CSP

AD9229
Exposed Paddle Thermal Heat Slug Recommendations
SILKSCREEN PARTITION
PIN 1 INDICATOR
It is mandatory that the exposed paddle on the underside of the
ADC be connected to analog ground (AGND) to achieve the
best electrical and thermal performance of the AD9229. A
continuous exposed copper plane on the PCB should mate to
the AD9229 exposed paddle, Pin 0. The copper plane should
have several vias to achieve the lowest possible resistive thermal
path for heat dissipation to flow through the bottom of the PCB.
Figure 46. Typical PCB Layout
These vias should be solder or epoxy filled (plugged).
To maximize the solder coverage and adhesion between the
ADC and PCB, overlay a silkscreen to partition the continuous
copper plane on the PCB into several uniform sections. This
provides several tie points between the two during the reflow
process. Using one continuous plane with no silkscreen
partitions only guarantees one tie point between the ADC and
PCB. See Figure 46 for a PCB layout example. For detailed
information on packaging and the PCB layout of chip scale
packages, visit www.analog.com.
Rev. B | Page 23 of 40