For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com

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HMC920LP5E

v07.1013

ACTIVE BIAS CONTROLLER

HMC920LP5E is an active bias controller which generates a regulated Drain voltage and actively adjusts the gate

voltage of an external amplifier to achieve constant bias current. It can be used to bias any enhancement and depletion

type amplifiers operating in Class-A regime with Drain voltages (VDRAIN) from 3V to 15V and drain currents (IDRAIN)

up to 500mA, offering a complete biasing solution.

HMC920LP5E achieves excellent bias stability over supply, temperature and process variations, and eliminates the

required calibration procedures used to prevent RF performance degradation due to such variations.

The HMC920LP5E is housed in an RoHS compliant 5x5 mm QFN leadless package with an exposed backside pad

to improve thermal characteristics.

General Description

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Units

Supply Voltage

Vdd

5

16.5

V

Quiescent Current

IDD

Vdd = 5V

EN = Vdig

35

mA

EN = GND

20

mA

Vdd = 15V

EN = Vdig

35

mA

EN = GND

20

mA

Negative Voltage Output

VNEG

-2.5

V

Oscillator Frequency

FOSC

250

kHz

Bandgap Reference

VBGC

2

V

VDIG Feedback

VDIGFB

2.5

V

LDOCC Feedback

LDOFB

2

V

Enable Input Threshold

ENTHRS

Vinlow

1

V

Vinhigh

1.4

V

ALMTRIG Input Threshold

ALMTRIG

Vinlow

1

V

Vinhigh

1.4

V

Low Vdd Alarm Threshold

VddCHK

3.8

V

VDRAIN Characteristics

DRAIN Current Adjustment Range

IDRAIN

0

500

mA

DRAIN Current Change Over Supply Voltage

ΔIDRAINV

VDRAIN set to 6V,

IDRAIN set to 100mA,

0.05

%/V

DRAIN Current Change Over Temperature

0.03

%/C

DRAIN Adjustment Range

VDRAIN

3

15

V

VDRAIN Change Over Supply Voltage

ΔVDRAIN

VDRAIN set to 6V,

IDRAIN set to 100mA,

0.05

%/V

VDRAIN Change Over Temperature

0.008

%/C

VNEG Characteristics

Negative Voltage Output

VNEG

-2.5

V

VNEG Current Sink

INEG

0

60

mA

VGATE Characteristics

GATE Current Supply

IG

-4

4

mA

VGATE Low Level

VG_MIN

VNEG

V

VGATE High Level

VG_MAX

VNEG+4.5

V

VDIG Characteristics

Adjustment Range

VDIG

3.5

5

V

VDIG Current Source

IDIG

30

mA

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