ADL5569

Data Sheet

Rev. C | Page 20 of 23

ADL5569

AVDD +3.3V

DRVDD

2kΩ

VCOM

VIP

VCC

PDB

VOP

VON

EPAD

VIN

AVDD +3.3V

15.4kΩ

200Ω

0.35pF

ADC

INTERNAL

INPUT Z

AD9689

AND

AD9208

ANALOG

INPUT

INPUT

Z = 50Ω

0.1µF

AVDD –2.0V

AVDD

DVDD

180Ω

5Ω

5Ω

10Ω

10Ω

650Ω

750Ω

750Ω

33Ω

AVDD 3.3V

5.1nH

100Ω

650Ω

AVDD –2.0V

AVDD –2.0V

AVDD –2.0V

VIN = VIP = 0.0V

VCOM = +1.4V

VOP = VON = +1.4

AVDD +3.3V

AVDD +3.3V

VIN+

VIN–

Figure 52. 1.5 GHz Bandwidth, DC-Coupled ADC Interfacing Example: ADL5569 Driving the AD9689 and AD9208

SOLDERING INFORMATION AND RECOMMENDED

LAND PATTERN

Figure 53 shows the recommended land pattern for the ADL5569.

The ADL5569 is contained in a 2.5 mm × 3 mm LFCSP, which

has an exposed ground pad (EPAD). This pad is internally

connected to the ground of the chip. To minimize thermal

impedance and ensure electrical performance, solder the pad to

the low impedance ground plane on the PCB. To further reduce

thermal impedance, it is recommended that the ground planes

on all layers under the pad be stitched together with vias.

For more information on land pattern design and layout, refer

to the AN-772 Application Note, A Design and Manufacturing

Guide for the Lead Frame Chip Scale Package (LFCSP).

The land pattern on the ADL5569-EVALZ provides a simulated

Figure 53. Recommended Land Pattern

EVALUATION BOARD

Figure 54 shows the general block diagram of the ADL5569-

EVALZ evaluation board. The schematic of the ADL5569-

EVALZ is shown in Figure 55 and has several options. The

ADL5569-EVALZ is powered by a single 5 V supply. The power

supply is decoupled by 10 µF and 0.1 µF capacitors. On-board

regulators provide a 2.5 V common-mode voltage and 3 V logic

supply voltage to enable and disable the power-down feature.

Several termination options are also provided to allow the user

to terminate unused inputs and outputs of the amplifier for

single-ended applications.

For more evaluation board options on the ADL5569, contact

the Analog Devices sales.

0.1µF

0.1µF

VIN

VCOM

VIP

0.1µF

0.1µF

0.1µF

ADL5569

AMPLIFIER 1

10µF

SMA

SMA

SMA

SMA

0.01µF

Figure 54. General Block Diagram of the ADL5569-EVALZ Evaluation Board