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DB-85015-940
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RF power amplifier using 1 x PD85015-E N-channel enhancement-mode lateral MOSFETs
Features

Excellent thermal stability Frequency: 860 - 940 MHz Supply voltage: 13.6 V Output power: 10 W Power gain: 15.7 0.4 dB Efficiency: 60% - 62% Load mismatch: 20:1 BeO free amplifier
Description
The DB-85015-940 is a common source N-channel enhancement-mode lateral field effect RF power amplifier designed for UHF radio applications. Table 1.
Mechanical specification: L = 60 mm, W = 30 mm
Device summary
Order codes DB-85015-940
March 2009
Rev 1
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Contents
DB-85015-940
Contents
1 www..com Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 3 4
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4.1 VDD = 13.6 V, IDQ = 200 mA, PIN = 25 dBm . . . . . . . . . . . . . . . . . . . . . . 5
5 6 7 8 9
Circuit photo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Mounting indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
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DB-85015-940
Electrical data
1
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Electrical data
Maximum ratings
Table 2.
Symbol VDD ID PDISS TCASE TA Supply voltage Drain current Power dissipation Operating case temperature Max. ambient temperature
1.1
Absolute maximum ratings
Parameter Value 24 3 25 -20 to +85 55 Unit V A W C C
2
Electrical characteristics
TA = +25 C, VDD = 13.6 V, IDQ = 200 mA Table 3.
Symbol Freq POUT Gain ND H2 H3 VSWR
Electrical specification
Test conditions Frequency range @ PIN = 25 dBm @ PIN = 25 dBm @ PIN = 25 dBm 2 3
ND RD
Min. 860 10
Typ.
Max. 940
Unit MHz W
15.7 0.4 60 - 62 -40 -50 20:1
dB % dBc dBc
harmonic @ PIN = 25 dBm harmonic @ PIN = 25 dBm
Load mismatch all phases @ PIN = 25 dBm
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Impedance
DB-85015-940
3
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Impedance
Figure 1. Impedance graphic
D
ZDL
ZGS IN
G
S
Table 4.
Impedance data
f(MHz) 860 870 880 890 900 910 920 930 940 ZGS () 1,61 + j1,43 1,60 + j1,67 1,49 + j1,82 1,43 + j2,05 1,37 + j2,23 1,31 + j2,41 1,28 + j2,58 1,19 + j2,77 1,14 + j2,96 ZDL () 2,67 + j3,62 2,62 + j3,76 2,58 + j3,91 2,52 + j4,05 2,49 + j4,19 2,43+ j4,29 2,36 + j4,46 2,28 + j4,59 2,18 + j 4,67
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DB-85015-940
Typical performance
4
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Typical performance
VDD = 13.6 V, IDQ = 200 mA, PIN = 25 dBm
Output power and drain current vs Figure 3. frequency_Vdd = 13.6 V, Idq = 200 mA, Pin = 25 dBm Gain and efficiency vs frequency_Vdd = 13.6 V, Idq = 200 mA, Pin = 25 dBm
4.1
Figure 2.
Figure 4.
Input return loss vs frequency_Vdd Figure 5. = 13.6 V, Idq = 200 mA, Pin = 25dBm
Harmonics vs frequency_Vdd = 13.6 V, Idq = 200 mA, Pin = 25 dBm
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Circuit photo
DB-85015-940
5
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Circuit photo
Figure 6. Circuit photo
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DB-85015-940
Test circuit
6
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Test circuit
Test circuit schematic
1+
MSub
FR4 H=60 mil
D1
R1
B2 B1
C3
C4
+ C5
2-
Vcc
R2
C2 C1 R3 L1
TL5 LDMOS PD85015-E RFin TL1 C6 TL2 TL3 C7 TL4 C8 C9 C10
TL6 C11 C12
C13
TL7
RFout
Table 6.
Components part list for DB-85015-940
Description Ferrite bead Ferrite bead Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Zener diode Inductor Resistor Potentiometer Resistor 120 pF 1 nF 100 nF 10 F 33 pF 2.2 pF 3.3 pF 15 pF 4.7 pF 5.1 V 28 nH 1 k 10 k 150 1206 1206 1206 1206 1206 SMT 1111 1111 1111 1111 1111 SOD110 Value Case size Manufacturer Panasonic Panasonic Murata Murata Murata Panasonic Murata Murata Murata Murata Murata Philips Coilcraft Tyco electronics Bourns electronics Bourns electronics Part code EXCELDRC35C EXCELDRC35C GRM42-6 COG 121J 50 GRM42-6 COG 102J 50 GRM42-6_X7R 104K 50 EEVHB1V100P MA69330JAB MA692R2CAB MA693R3CAB MA69150JAB MA694R7CAB BZX284C5V1 B08T 01623440-1 3214W-1-103E
Component ID B1 B2 C1, C2 C3 C4 C5 C6, C13 C7 C8, C11 C9, C10 C12 D1 L1 R1 R2 R3 TL1 TL2 TL3
Transmission line W=2.87 mm L=7.4 mm Transmission line W=2.87 mm L=8,0 mm Transmission line W=4.98 mm L=1,4 mm
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Test circuit Table 6. Components part list for DB-85015-940 (continued)
Description Value Case size Manufacturer
DB-85015-940
Component ID TL4
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Part code
Transmission line W=4.98 mm L=1,2 mm Transmission line W=4.98 mm L=1,3 mm Transmission line W=2.87 mm L=9,5 mm Transmission line W=2.87 mm L=5,8 mm LDMOS STMicroelectronics FR-4 THk=0.060" 2 OZ Cu both sides PD85015-E
TL5 TL6 TL7
PD85015-E Board
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DB-85015-940
Mounting indications
7
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Mounting indications
Figure 7. PowerSO-10 mounting indications
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Package mechanical data
DB-85015-940
8
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Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK(R) packages, depending on their level of environmental compliance. ECOPACK(R) specifications, grade definitions and product status are available at: www.st.com. ECOPACK is an ST trademark.
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DB-85015-940
Package mechanical data
Table 7.
Dim.
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PowerSO-10RF formed lead (gull wing) mechanical data
mm. Min. Typ. 0.05 3.5 1.3 0.2 0.2 5.4 0.23 9.4 7.4 13.85 9.3 7.3 5.9 5.53 0.27 9.5 7.5 14.1 9.4 7.4 6.1 0.5 1.2 0.8 1 0.8 2 deg 5 deg 6 deg 10 deg 8 deg 2 deg 1.1 0.25 0.031 5 deg 6 deg 10 deg 8 deg 0.030 5.65 0.32 9.6 7.6 14.35 9.5 7.5 6.3 0.212 0.008 0.370 0.290 0.544 0.365 0.286 0.231 Max. 0.1 3.6 1.4 0.25 Min. 0. 0.134 0.046 0.005 Inch Typ. 0.0019 0.137 0.05 0.007 0.007 0.217 0.01 0.374 0.295 0.555 0.37 0.292 0.24 0.019 0.047 0.039 0.042 0.01 0.221 0.012 0.377 0.298 0.565 0.375 0.294 0.247 Max. 0.0038 0.142 0.054 0.009
A1 A2 A3 A4 a b c D D1 E E1 E2 E3 F G L R1 R2 T T1 T2
0 3.4 1.2 0.15
Note:
Resin protrusions not included (max value: 0.15 mm per side) Figure 8. Package dimensions
Critical dimensions: - Stand-off (A1) - Overall width (L)
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Package mechanical data
DB-85015-940
Figure 9.
PowerSO-10RF tape and reel
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DB-85015-940
Revision history
9
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Revision history
Table 8.
Date 25-Mar-2009
Document revision history
Revision 1 Initial release Changes
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DB-85015-940
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