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

11

11 - 11

Pin Descriptions (Continued)

Pin Number

Function

Description

Interface schematic

9, 10

coFsA,

coFsB

High pass filter capacitor input. Connect a capacitor

between coFsA and coFsB to determine 3 dB

point of input signal high-pass filter.

14

Vset

set point input for controller mode. Allows change of

output slope resulting in output power leveling.

15

rMsoUt

Logarithmic output that provides an

indication of mean square input power.

17 - 20

scI1 - scI4

Digitally Programmable Integration Bandwidth

control. Input pins that control the internal

integration time constant for rMs calculation. scI4

is the most significant bit. Set V>0.8xVcc to enable

and V<0.2xVcc to disable (active high). Shortest

integration time is for scI=0000, allowed longest

integration time is for SCI=1100 (1101, 1110 and

1111 SCI settings are forbidden states). Each step

changes the integration time by 1 octave.

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.

HMC909LP4E

v02.0511

RMS POWER DETECTOR

SINGLE-ENDED, DC - 5.8 GHz

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

For price, delivery, and to place orders: Analog Devices, Inc.,

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106

Phone: 781-329-4700 • Order online at www.analog.com

Application Support: Phone: 1-800-ANALOG-D