ADL5902 datasheet(25/28 Pages) AD

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Data Sheet

ADL5902

Rev. B | Page 25 of 28

HIGH FREQUENCY PERFORMANCE

The ADL5902 is specified to 6 GHz; however, operation is

possible to as high as 9 GHz with sufficient dynamic range for

many purposes. Figure 52 shows the typical VOUT response and

conformance error at 7 GHz, 8 GHz, and 9 GHz.

–6

–5

–4

–3

–2

–1

0.25

0.50

0.75

1.00

1.25

1.50

1.75

2.00

2.25

2.50

2.75

3.00

–50

–40

–30

–20

–10

7GHz

8GHz

9GHz

PIN (dBm)

Figure 52. Typical VOUT and Log Conformance Error at 7 GHz, 8 GHz,

and 9 GHz, 25°C Only

LOW FREQUENCY PERFORMANCE

The lowest frequency of operation of the ADL5902 is approxi-

mately 50 MHz. This is the result of the circuit design and

architecture of the ADL5902.

DESCRIPTION OF CHARACTERIZATION

The general hardware configuration used for most of the ADL5902

characterization is shown in Figure 53. The ADL5902 was driven in

a single-ended configuration for most characterization, except

where noted.

Much of the data was taken using an Agilent E4438C signal source

as a RF input stimulus. Several ADL5902 devices mounted on

circuit boards constructed of Rodgers 3006 material are put into

a test chamber simultaneously, and a Keithley S46 RF switching

network connected the signal source to the appropriate device

under test. The test chamber temperature was set to cycle over

the appropriate temperature range. The signal source, switching,

and chamber temperature are all controlled by a PC running

Agilent VEE Pro.

The subsequent response to stimulus was measured with a

voltmeter and the results stored in a database for analysis later.

In this way, multiple ADL5902 devices are characterized over

amplitude, frequency, and temperature in a minimum amount

of time. The RF stimulus amplitude was calibrated up to the

circuit board that carries the ADL5902, and, thus, it does not

account for the slight losses due to the connector on the circuit

board that carries the ADL5902 nor for the loss of traces on the

circuit board. For this reason, there is a small absolute amplitude

error (generally <0.5 dB) not accounted for in the characterization

data, but this is generally not important because the ADL5902

relative accuracy is unaffected.

ADL5902

CHARACTERIZ ATION

BOARD – TEST SITE 1

ADL5902

CHARACTERIZ ATION

BOARD – TEST SITE 2

KEITHLEY S46

MICROWAVE

SWITCH

AGILENT E8251A

MICROWAVE

SIGNAL

GENERATOR

AGILENT 34980A

SWITCH MATRIX/

DC METER

AGILENT E3631A

DC POWER

SUPPLIES

PERSONAL

COMPUTER

ADL5902

CHARACTERIZ ATION

BOARD – TEST SITE 3

DATA AND CONTROL

Figure 53. General Characterization Configuration

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