ADL5246ACPZN-R7 datasheet(33/36 Pages) AD

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Data Sheet

ADL5246

Rev. A | Page 33 of 36

CHARACTERIZATION INFORMATION

The ADL5246 was characterized with multiple samples obtained

from three batch lots. Each ADL5246 was attached to its own

circuit board that was dedicated and tuned to one of the AMP3

frequency bands. This created a body of boards dedicated to

each band. AMP1 and AMP2 operate over a broad frequency

range and do not require tuning. Aggregating boards with their

AMP3 tuned to the various bands increased the sample size for

the characterization of AMP1 and AMP2.

Characterization measurements employed an Agilent Technologies

PNA-X vector network analyzer, scalar rack and stack equipment,

a noise figure analyzer, and temperature forcing equipment, all

under software control.

The typical performance figures represent one typical ADL5246

with performance near the median of a body of available samples.

A typical example ADL5246 was selected to represent AMP1

and a different ADL5246 was selected to represent AMP2. Separate

examples are used for each of the AMP3 bands; therefore, the

AMP3 plots do not show the same ADL5246 board retuned to

each band.

The plots show the performance obtained by the typical

ADL5246 chosen to demonstrate each amplifier, rather than

showing the numerical median of all the samples measured for

any one parameter.

The circuit boards used for device characterization are fabricated

with Isola FR408, which offers a low coefficient of thermal

expansion (CTE) and lower attenuation than standard FR4 without

the fragility of Rogers materials.

All three amplifiers are powered on even when not directly in

use and this made heat a concern when testing in a high

temperature environment. Two 10 mm × 10 mm heat sinks are

attached to the back of the circuit board with Arctic Silver thermal

adhesive. This lowered the θJA at the top of the package from

16.5°C/W without the heat sink to 12.5°C/W with one, making

operating AMP3 at P1dB output power levels in a 105°C ambient

temperature possible without reaching the maximum junction

temperature of the ADL5246.

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