M A COM MD-108PIN Datasheet

Double-Balanced Mixer,
5 - 500 MHz

V 3.00

MD-108

Features

n Low Cost
n Conversion Loss: 7 dB Typical
n Impedance: 50 Ohms Nominal
n Maximum Input Power: 400 mW max. @ 25°C,

Derated to 85°C @ 3.2 mW/°C

n IF Port Current: 50 mA Max.
n MIL-STD-883 Screening Available

Description

Transformers convert the LO and RF paths to balanced
lines connecting to a low barrier, Schottky diode ring quad.
These transformers help provide excellent isolation between
ports. Conversion Loss is low. The direct connection of
the IF port to the diode quad allows these mixers to be used
as phase detectors and bi-phase modulators.

Pin Configuration

Pin No. Function Pin No. Function

1 LO 5 LO
2 GND 6 GND

3* IF 7* IF

4 GND 8 RF

RH-3

* P3 and P7 are connected together to make IF port.

Electrical Specifications1: TA = -55°C to +85°C

Parameter Test Conditions Frequency Units Min Typ Max

Frequency Range RF, LO Ports

Conversion Loss 5 - 150 MHz

Isolation LO to RF

DC Polarity Negative, if LO input at Pin 1 — — — — —

DC Offset mV — <1 —

RF Input 1 dB Compression

SSB Noise Figure Within 1 dB of Conversion Loss

Typical Two Tone IM

Ratio

1. All specifications apply when operated at +7 dBm available LO power with 50 ohm source and load impedance.

With –10 dBm input, each input 25

IF Port

LO to IF
RF to IF

1 dB Desensitization

Max.

MHz and 35 MHz IF

5 - 500

DC - 500

150 - 500 MHz

5 - 150 MHz

150 - 500 MHz

5 - 150 MHz

150 - 500 MHz

5 - 150 MHz

150 - 500 MHz

dBm

— — — — —

100 - 350 MHz
350 - 500 MHz

MHz
MHz

dB
dB

dB
dB
dB
dB
dB
dB

dBm

dB
dB

—
—

—
—

40
35
35
25
25
20

—
—

—
—

+2.5

—
—

—
—

—
—
—
—
—
—

0

>55
>40

—
—

7.0

9.0
—

—
—
—
—
—

—
—

—
—

Double-Balanced Mixer, 5 - 500 MHz

Typical Performance Curves

MD-108

V 3.00

Conversion Loss (LO = +7 dBm,
RF = -5 dBm, IF = 5 MHz)

8

7

6

Conversion Loss (dB)

5

5 10 20 50 100 200 300 400 500

Frequency (MHz)

Conversion Loss vs. LO Power
(LO = 200 MHz, RF = 140 MHz @ -10
dBm, IF = 60 MHz)

12

10

Isolation (Input = +7 dBm)

60

50

40

Isolation (dB)

30

20

5 10 20 50 100 200 300 400 500

L-R L-X R-X

Frequency (MHz)

Ordering Information

Part Number Package

MD-108 PIN RH-3

8

Loss (dB)

6

4

-5 0 5 10 15

LO Power (dBm)

Specifications subject to change without notice.

n North America: Tel. [phone]
n Asia/Pacific: Tel.[phone], Fax [phone]
n Europe: Tel. [phone], Fax[phone]

Visit www.macom.com for additional data sheets and product information.

2