2
RF Device Data
Freescale Semiconductor
MRF8S18120HR3 MRF8S18120HSR3
Table 2. Thermal Characteristics
Characteristic Symbol Value
(1,2)
Unit
Thermal Resistance, Junction to Case
Case Temperature 79#C, 72 W CW, 28 Vdc, I
DQ
= 800 mA
Case Temperature 79#C, 120 W CW, 28 Vdc, I
DQ
= 800 mA
R
%
JC
0.47
0.46
#C/W
Table 3. ESD Protection Characteristics
Test Methodology Class
Human Body Model (per JESD22--A114) 2 (Minimum)
Machine Model (per EIA/JESD22--A115) A (Minimum)
Charge Device Model (per JESD22--C101) IV (Minimum)
Table 4. Electrical Characteristics (T
A
=25#C unless otherwise noted)
Characteristic Symbol Min Typ Max Unit
Off Characteristics
Zero Gate Vo ltage Drain Leakage Current
(V
DS
=65Vdc,V
GS
=0Vdc)
I
DSS
— — 10 &Adc
Zero Gate Vo ltage Drain Leakage Current
(V
DS
=28Vdc,V
GS
=0Vdc)
I
DSS
— — 1 &Adc
Gate--Source Leakage Current
(V
GS
=5Vdc,V
DS
=0Vdc)
I
GSS
— — 1 &Adc
On Characteristics
Gate Threshold Voltage
(V
DS
=10Vdc,I
D
= 260 &Adc)
V
GS(th)
1.2 1.8 2.7 Vdc
Gate Quiescent Voltage
(V
DD
=28Vdc,I
D
= 800 mAdc, Measured in Functional Test)
V
GS(Q)
1.8 2.6 3.3 Vdc
Drain--Source On-- Voltage
(V
GS
=10Vdc,I
D
=2.3Adc)
V
DS(on)
0.1 0.2 0.3 Vdc
Functional Tests
(3)
(In Freescale Test Fixture, 50 ohm system) V
DD
=28Vdc,I
DQ
= 800 mA, P
out
= 72 W CW, f = 1805 MHz
Power Gain
G
ps
17 18.2 20 dB
Drain Efficiency "
D
48 49.8 — %
Input Return Loss IRL — -- 1 1 -- 8 dB
P
out
@ 1 dB Compression Point, CW P1dB 112 — — W
Typical Broadband Performance (In Freescale Test Fixture, 50 ohm system) V
DD
=28Vdc,I
DQ
= 800 mA, P
out
=72WCW
Frequency
G
ps
(dB)
"
D
(%)
IRL
(dB)
1805 MHz 18.2 49.8 -- 1 1
1840 MHz 18.6 51.4 -- 1 5
1880 MHz 18.7 53.9 -- 1 2
1. MTTF calculator available at http://www.freescale.com/rf. Select Software & Tools/Development Tools/Calculators to access MTTF
calculators by product.
2. Refer to AN1955, Thermal Measurement Methodology of RF Power A mplifiers. Go to http://www.freescale.com/rf
.
Select Documentation/Application Notes -- AN1955.
3. Part internally matched both on input and output.
(continued)