ADL5367

Rev. 0 | Page 19 of 24

APPLICATIONS INFORMATION

BASIC CONNECTIONS

The ADL5367 mixer is designed to upconvert or downconvert

between radio frequencies (RF) from 500 MHz to 1700 MHz and

intermediate frequencies (IF) from dc to 450 MHz. Figure 50

depicts the basic connections of the mixer. It is recommended

to ac-couple the RF and LO input ports to prevent non-zero dc

voltages from damaging the RF balun or LO input circuit. The

RFIN capacitor value of 8 pF is recommended to provide the

optimized RF input return loss for the desired frequency band.

For upconversion, the IF input, Pin 18 (IFON) and Pin 19 (IFOP),

must be driven differentially or using a 1:1 ratio transformer for

single ended operation. An 8 pF capacitor is recommended for

the RF output, Pin 2 (RFIN).

IF PORT

The real part of the output impedance is approximately 50 Ω,

as seen in Figure 26, which matches many commonly used SAW

filters without the need for a transformer. This results in a voltage

conversion loss that is approximately the same as the power

conversion loss, as shown in Table 3.

BIAS RESISTOR SELECTION

integrated amplifiers at the LO terminals. It is necessary to have

a sufficient amount of current to bias the internal LO amplifier

to optimize dc current vs. optimum IIP3 performance. Figure 37

and Figure 39 provide the reference for the bias resistor selection

when lower power consumption is considered at the expense of

conversion gain and IP3 performance.

MIXER VGS CONTROL DAC

The ADL5367 features two logic control pins, Pin 12 (VGS0)

and Pin 13 (VGS1), that allow programmability for internal

gate-to-source voltages for optimizing mixer performance over

desired frequency bands. The evaluation board defaults both

VGS0 and VGS1 to ground. Power conversion loss, NF, and

IIP3 can be optimized, as shown in Figure 35 and Figure 36.

2

3

1

19

18

17

16

6

7

8

9

10

14

15

12

11

BIAS

GENERATOR

LO2_IN

RF-IN

+5V

+5V

+5V

+5V

LO1_IN

10k

Ω

R1

0

Ω

C24

560pF

10k

Ω

10pF

10pF

10pF

8pF

10pF

0.01µF

4.7µF

22pF

10pF

22pF

ADL5367

20

13

5

4

T1

IF1_OUT

C25

560pF

Figure 50. Typical Application Circuit