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For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824

Phone: 978-250-3343

Fax: 978-250-3373

Order On-line at www.hittite.com

Application Support: Phone: 978-250-3343 or apps@hittite.com

Pin Descriptions

Pin Number

Function

Description

Interface Schematic

1VccLO

Supply for LO Amplifier.

Draws approximately 120mA from VSLO.

A 13 Ohm resistor (R1) must be connected

externally between the VSLO supply and the

VccLO pin. See evaluation PCB schematic.

2, 5, 8, 11,

14, 17, 20, 23

GND

These pins and the ground paddle should be

connected to a high quality RF/DC ground.

3LOP

LO Input Port. This pin needs a DC blocking capacitor.

(Typical voltage on this pin will be 1.5 - 1.8V)

4LON

For single ended applications, this pin should be AC

grounded

6, 7, 12,

21, 22, 24

N/C

The pins are not connected internally; however, all data

shown herein was measured with these pins connected to

RF/DC ground externally.

9, 10

IFN, IFP

Differential baseband outputs, 200 ohm differential output

impedance. Each port should draw approximately 25mA

from VSIF without LO power and 28mA from VSIF with LO

power on.

For single-ended 50 Ohm operation, port J2 or J3 should be

shorted to RF/DC ground. See evaluation PCB schematic.

13, 18

CTRF

Center tap of the RF transformer. Biased at 2.2V when con-

nected to ground through two 91 ohm resistors.

15

GNDRF

Pin to be connected to a high quality RF/DC ground. Also

can be used to drive the RF port differentially if needed.

16

RF

50 Ohms impedance can be matched

from 600 - 3000 MHz.

19

VccIF

Supply decoupling for the mixer stage.

(Typical voltage on this pin will be 4.8V)

Connect C3 to a high quality RF/DC

ground per evaluation PCB schematic.

v03.0410

SiGe WIDEBAND

DOWNCONVERTER, 0.6 - 2.7 GHz