Document
HMC478ST89 / 478ST89E
v05.0710
SiGe HBT GAIN BLOCK MMIC AMPLIFIER, DC - 4 GHz
AMPLIFIERS - DRIVER & GAIN BLOCK - SMT
8
8 - 104
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
Functional Diagram
Features
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
General Description
The HMC478ST89 & HMC478ST89E are SiGe Heterojunction Bipolar Transistor (HBT) Gain Block MMIC SMT amplifiers covering DC to 4 GHz. Packaged in an industry standard SOT89, the amplifier 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.
Electrical Specifications, Vs= 5V, Rbias= 18 Ohm, TA = +25° C
Parameter
Min.
Gain Gain Variation Over Temperature Input Return Loss
DC - 1.0 GHz
19
1.0 - 2.0 GHz
16
2.0 - 3.0 GHz
13
3.0 - 4.0 GHz
11
DC - 4 GHz
DC - 1.0 GHz 1.0 - 3.0 GHz 3.0 - 4.0 GHz
Output Return Loss Reverse Isolation
Output Power for 1 dB Compression (P1dB)
Output Third Order Intercept (IP3) (Pout= 0 dBm per tone, 1 MHz spacing)
DC - 3.0 GHz 3.0 - 4.0 GHz
DC - 4 GHz
0.5 - 1.0 GHz
15
1.0 - 2.0 GHz
13
2.0 - 3.0 GHz
10
3.0 - 4.0 GHz
8
0.5 - 2.0 GHz 2.0 - 3.0 GHz 3.0 - 4.0 GHz
Noise Figure
DC - 2.0 GHz 2.0 - 4.0 GHz
Supply Current (Icq)
Note: Data taken with broadband bias tee on device output.
Typ.
22 19 16 14
0.015
15 10 13
13 15
20
18 16 13 11
30 28 25
3 4
62
Max. 0.02
82
Units
dB dB dB dB
dB/ °C
dB dB dB
dB dB
dB
dBm dBm dBm dBm
dBm dBm dBm
dB dB
mA
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AMPLIFIERS - DRIVER & GAIN BLOCK - SMT
v05.0710
Broadband Gain & Return Loss
30
20
RESPONSE (dB)
10
S21
0
S11
S22
-10
-20
-30
0
1
2
3
4
5
6
7
8
FREQUENCY (GHz)
Input Return Loss vs. Temperature
0
-5
RETURN LOSS (dB)
-10
-15
+25C
-20
+85C
-40C
-25
-30
0
1
2
3
4
5
FREQUENCY (GHz)
Reverse Isolation vs. Temperature
0
REVERSE ISOLATION (dB)
-5
-10 +25C
+85C
-15
-40C
-20
-25
-30
0
1
2
3
4
5
FREQUENCY (GHz)
HMC478ST89 / 478ST89E
SiGe HBT GAIN BLOCK MMIC AMPLIFIER, DC - 4 GHz
Gain vs. Temperature
30
25
20
GAIN (dB)
15
+25C
10
+85C
-40C
5
0
0
1
2
3
4
5
FREQUENCY (GHz)
8
Output Return Loss vs. Temperature
0
+25C
-5
+85C
-40C
-10
RETURN LOSS (dB)
-15
-20
0
1
2
3
4
5
FREQUENCY (GHz)
Noise Figure vs. Temperature
10
8
+25C +85C
-40C
6
NOISE FIGURE (dB)
4
2
0
0
1
2
3
4
5
FREQUENCY (GHz)
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8 - 105
v05.0710
AMPLIFIERS - DRIVER & GAIN BLOCK - SMT
P1dB vs. Temperature
8
24
20
P1dB (dBm)
16
12
8
+25C +85C
-40C
4
0
0
1
2
3
4
5
FREQUENCY (GHz)
Output IP3 vs. Temperature
35
30
IP3 (dBm)
25
20
+25C
15
+85C
-40C
10
0
1
2
3
4
5
FREQUENCY (GHz)
Vcc vs. Icc Over Temperature for Fixed Vs= 5V, RBIAS= 18 Ohms
80
75.