AD9244-40PCB Analog Devices Inc, AD9244-40PCB Datasheet - Page 25

• Manufacturer Part Number: AD9244-40PCB
• Description: BOARD EVAL FOR AD9244-40
• Manufacturer: Analog Devices Inc

Specifications of AD9244-40PCB

• Rohs Status: RoHS non-compliant
• Number Of Adc's: 1
• Number Of Bits: 14
• Sampling Rate (per Second): 40M
• Data Interface: Parallel
• Inputs Per Adc: 1 Differential
• Input Range: 2 Vpp
• Power (typ) @ Conditions: 345mW @ 40MSPS
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: AD9244-40

Reference Decoupling
The VREF pin should be bypassed to the REFGND pin with a
10 μF tantalum capacitor in parallel with a low inductance
0.1 μF ceramic capacitor. It is also necessary to add a capacitor
network to decouple the REFT and REFB pins. Figure 49 shows
the recommended decoupling networks.
CML
The AD9244 has a midsupply reference point. This is used
within the internal architecture of the AD9244 and must be
decoupled with a 0.1 μF capacitor. It sources or sinks a load of
up to 300 μA. If more current is required, the CML pin should
be buffered with an amplifier.
Rev. C | Page 25 of 36
VR
VR is an internal bias point on the AD9244. It must be
decoupled to AGND with a 0.1 μF capacitor.
0.1μF
Figure 63. CML/VR Decoupling
CML
AD9244
VR
0.1μF
AD9244