ADL5370

Rev. 0 | Page 17 of 20

CHARACTERIZATION SETUP

FMOD TEST SETUP

IP

IN

QP

QN

OUT

GND

VPOS

FMOD

LO

I OUT

Q OUT

VPOS +5V

LO

OUTPUT

90°

0°

IQ

R AND S SPECTRUM ANALYZER

FSU 20Hz TO 8GHz

I/AM

Q/FM

AGILENT 34401A

MULTIMETER

0.175 ADC

AGILENT E3631A

POWER SUPPLY

5.000

0.175A

COM

6V

±25V

+

–

+ –

AEROFLEX

IFR 3416

250kHz TO 6GHz SIGNAL GENERATOR

RF

OUT

FREQ 4MHz

LEVEL 0dBm

BIAS 0.5V

BIAS 0.5V

GAIN 0.7V

GAIN 0.7V

CONNECT TO BACK OF UNIT

+6dBm

RF

IN

Figure 38. Characterization Bench Setup

The primary setup used to characterize the ADL5370 is shown

in Figure 38. This setup was used to evaluate the product as a

single-sideband modulator. The Aeroflex signal generator supplied

the local oscillator (LO) and differential I and Q baseband

signals to the device under test, DUT. The typical LO drive was

0 dBm. The I channel is driven by a sine wave, and the Q channel

is driven by a cosine wave. The lower sideband is the single

sideband (SSB) output.

The majority of characterization for the ADL5370 was performed

using a 1 MHz sine wave signal with a 500 mV common-mode

voltage applied to the baseband signals of the DUT. The baseband

offsets on the baseband inputs were minimized, as close as

possible, to 0 V before connecting to the DUT.