Specifications and information are subject to change without notice

WJ Communications, Inc

• Phone 1-800- WJ1-4401 • FAX: 408-577-6621 • e- mail: sales@wj.com • Web site: www.wj.com

February 2004

MH203

High Linearity Cellular-Band MMIC Mixer

Product Information

Product Features

800 – 960 MHz

200 – 350 MHz

Applications

•

Industrial

•

Portable

Product Description

The MH203 is a passive GaAs MESFET mixer that

provides high dynamic range performance in a low

cost SOIC-8 package.

Its robustness and ease of use

make it an ideal candidate for the core of any RFID reader

application. It is compliant with EPC and ISO standards.

WJ’s MH203 uses patented techniques to realize +32

dBm Input IP3 at an LO drive level of +17 dBm

when used in a simple application circuit as an

upconverting

or

downconverting

high-side

LO

configuration.

This single monolithic integrated

circuit does not require any external baluns or bias

elements.

Typical applications include frequency up/down

conversion,

modulation

and

demodulation

for

next generation RFID technologies such as EPC, ISO,

ETSI, and ANSI. Their small size makes them ideal for

PCMCIA applications.

Functional Diagram

1

2

3

4

8

7

6

5

Function

Pin No.

LO

2

IF & RF

*

7

GND

1, 3, 4, 5, 6, 8

* External components (inductors &

capacitors) are required to diplex the signal

Specifications

1

Parameters

Units

Min

Typ

Max

Comments

RF Frequency Range

MHz

800

960

LO Frequency Range

MHz

1000

1310

IF Frequency Range

MHz

200

350

SSB Conversion Loss

dB

8.2

9.5

Noise Figure

dB

8.7

See note 2

Input IP3

dBm

+28

+32

See note 3

Input P1dB

dBm

+17.5

LO – RF Isolation

dB

25

30

LO – IF Isolation

dB

50

65

RF – IF Isolation

dB

25

Return Loss: RF Port

dB

20

See note 4

Return Loss: IF Port

dB

17

See note 4

Return Loss: LO Port

dB

12

LO Drive Level

dBm

+17

Test conditions unless otherwise noted:

1. Performance is with the use of an application specific circuit (shown on page 4) with a high-side LO at +17 dBm in a downconverting application at 25° C.

2. Assumes LO injection noise is filtered at the thermal noise floor, -174 dBm/Hz, at the RF, IF, and Image frequencies.

3. IIP3 is measured with

∆f = 1 MHz with RF

4. The return loss is measured after the diplexer which splits the RF and IF signals from the mixer. Details of the diplexing circuit is shown on page 4.

Absolute Maximum Rating

Ordering Information

Parameter

Rating

Part No.

Description

Operating Case Temperature

-40° to +85

°C

MH203

Cellular-band MMIC Mixer

Storage Temperature

-65° to +100 °C

MH203-PCB

Fully -Assembled Mixer Application Board

Maximum Input LO Power

6

+21 dBm

5. Operation of this device above any of these parameters may cause permanent damage.

6. Total sum of the LO and RF port power should not exceed +23 dBm .