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
AMPLIFIERS - DRIVER & GAIN BLOCK - SMT
8
8 - 104
HMC478ST89 / 478ST89E
SiGe HBT GAIN BLOCK
MMIC AMPLIFIER, DC - 4 GHz
v05.0710
General Description
Functional Diagram
The HMC478ST89 & HMC478ST89E are SiGe
Heterojunction Bipolar Transistor (HBT) Gain Block
MMIC SMT ampli ers covering DC to 4 GHz. Pack-
aged in an industry standard SOT89, the ampli er
can be used as a cascadable 50 Ohm RF/IF gain
stage as well as a LO or PA driver with up to +20 dBm
output power. The HMC478ST89(E) offers 22 dB of
gain with a +30 dBm output IP3 at 850 MHz while
requiring only 62mA from a single positive supply.
The Darlington feedback pair used results in reduced
sensitivity to normal process variations and excellent
gain stability over temperature while requiring a
minimal number of external bias components.
P1dB Output Power: +18 dBm
Gain: 22 dB
Output IP3: +30 dBm
Cascadable 50 Ohm I/Os
Single Supply: +5V to +8V
Industry Standard SOT89 Package
Robust 1,000V ESD, Class 1C
Included in the HMC-DK001 Designer’s Kit
Typical Applications
The HMC478ST89 / HMC478ST89E is an ideal RF/IF
gain block & LO or PA driver:
• Cellular / PCS / 3G
• Fixed Wireless & WLAN
• CATV, Cable Modem & DBS
• Microwave Radio & Test Equipment
Electrical Speci cations, Vs= 5V, Rbias= 18 Ohm, T
A
= +25° C
Note: Data taken with broadband bias tee on device output.
Parameter Min. Typ. Max. Units
Gain
DC - 1.0 GHz
1.0 - 2.0 GHz
2.0 - 3.0 GHz
3.0 - 4.0 GHz
19
16
13
11
22
19
16
14
dB
dB
dB
dB
Gain Variation Over Temperature DC - 4 GHz 0.015 0.02 dB/ °C
Input Return Loss
DC - 1.0 GHz
1.0 - 3.0 GHz
3.0 - 4.0 GHz
15
10
13
dB
dB
dB
Output Return Loss
DC - 3.0 GHz
3.0 - 4.0 GHz
13
15
dB
dB
Reverse Isolation DC - 4 GHz 20 dB
Output Power for 1 dB Compression (P1dB)
0.5 - 1.0 GHz
1.0 - 2.0 GHz
2.0 - 3.0 GHz
3.0 - 4.0 GHz
15
13
10
8
18
16
13
11
dBm
dBm
dBm
dBm
Output Third Order Intercept (IP3)
(Pout= 0 dBm per tone, 1 MHz spacing)
0.5 - 2.0 GHz
2.0 - 3.0 GHz
3.0 - 4.0 GHz
30
28
25
dBm
dBm
dBm
Noise Figure
DC - 2.0 GHz
2.0 - 4.0 GHz
3
4
dB
dB
Supply Current (Icq) 62 82 mA
Features
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
