ADL5380ACPZ-R7 datasheet(30/36 Pages) AD

30 / 36 page

ADL5380

Rev. 0 | Page 30 of 36

CHARACTERIZATION SETUPS

Figure 95 to Figure 97 show the general characterization bench

setups used extensively for the ADL5380. The setup shown in

Figure 97 was used to do the bulk of the testing and used sinusoidal

signals on both the LO and RF inputs. An automated Agilent

VEE program was used to control the equipment over the

IEEE bus. This setup was used to measure gain, IP1dB, IIP2,

IIP3, I/Q gain match, and quadrature error. The ADL5380

characterization board had a 9-to-1 impedance transformer on

each of the differential baseband ports to do the differential-to-

single-ended conversion, which presented a 450 Ω differential load

to each baseband port, when interfaced with 50 Ω test equipment.

For all measurements of the ADL5380, the loss of the RF input

balun was de-embedded. Due to the wideband nature of the

ADL5380, three different board configurations had to be used to

characterize the product. For low band characterization (400 MHz

to 3 GHz), the Mini-Circuits TC1-1-13 balun was used on the

RF and LO inputs to create differential signals at the device pins.

For midband characterization (3 GHz to 4 GHz), the Johanson

Technology 3600BL14M050T was used, and for high band

characterization (5 GHz to 6 GHz), the Johanson Technology

5400BL15B050E balun was used.

The two setups shown in Figure 95 and Figure 96 were used

for making NF measurements. Figure 95 shows the setup for

measuring NF with no blocker signal applied while Figure 96

was used to measure NF in the presence of a blocker. For both

setups, the noise was measured at a baseband frequency of

10 MHz. For the case where a blocker was applied, the output

blocker was at a 15 MHz baseband frequency. Note that great

care must be taken when measuring NF in the presence of a

blocker. The RF blocker generator must be filtered to prevent

its noise (which increases with increasing generator output power)

from swamping the noise contribution of the ADL5380. At least

30 dB of attention at the RF and image frequencies is desired.

For example, assume a 915 MHz signal applied to the LO inputs of

the ADL5380. To obtain a 15 MHz output blocker signal, the RF

blocker generator is set to 930 MHz and the filters tuned such

that there is at least 30 dB of attenuation from the generator at

both the desired RF frequency (925 MHz) and the image RF

frequency (905 MHz). Finally, the blocker must be removed

from the output (by the 10 MHz low-pass filter) to prevent

the blocker from swamping the analyzer.

HP 6235A

POWER SUPPLY

AGILENT 8665B

SIGNAL GENERATOR

IEEE

PC CONTROLLER

CONTROL

SNS

OUTPUT

AGILENT N8974A

NOISE FIGURE ANALYZER

ADL5380

CHAR BOARD

GND

VPOS

LOW-PASS

FILTER

INPUT

50Ω

Figure 95. General Noise Figure Measurement Setup

ADL5380ACPZ-R7 数据表(PDF) 30 Page - Analog Devices

ADL5380ACPZ-R7 数据表(HTML) 30 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36

数据表下载