RF3807PCK-415 RFMD, RF3807PCK-415 Datasheet - Page 7

• Manufacturer Part Number: RF3807PCK-415
• Description: KIT EVAL FOR RF3807
• Manufacturer: RFMD
• Type: Amplifier, CDMAr

Specifications of RF3807PCK-415

• Frequency: 450MHz ~ 2.5GHz
• For Use With/related Products: RF3807
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 689-1051; RF3807PCBA-416; RF3807PCK-416

RF3807 design accommodates use in a variety of applications:
• Linear driver from 450 MHz to 2200 MHz
• 2nd/3rd stage high linearity LNA, with noise figure in the 3 dB to 4 dB range from 800 MHz to 2200 MHz
• High efficiency (> 50%) output stage for non-linear applications
• 13 dB gain, > 37 dBm typical OIP
Nominal data sheet shows specification for V
simple bias resistor change at V
ing, 5 V data will compare to that for 8 V as follows:
• 3 dB to 3.5 dB reduction in OP1dB
• 0.4 dB to 0.5 dB increase in small signal gain
For operation at other than 5 V, bias R can be calculated as follows (V
different voltage is determined with same methodology).
1. Use nominal 8 V case as a starting point: V
2. Using standard evaluation board with separate lab supplies on (V
3. V
4. At this point, pin voltage at V
5. Next, calculate new bias R for V
Junction-to-case thermal resistance (R
was generated with nominal V
with operating condition, junction temperature can be calculated. Resultant T
RF3807 evaluation boards are matched for high efficiency at O
match achieving equivalent or better efficiency on system board should be the goal.
Typical s-parameter responses for each evaluation board are shown within the data sheet. These boards were matched with
two specifications in mind:
• Output load impedance set for optimum OIP
• Output load impedance set for high efficiency at O
In some cases, low power operation being one, it may be desirable to improve output return loss seen on evaluation board.
This can be done with output match adjust. The result will be an increase in small signal gain. Tradeoffs between return loss,
gain, OIP
Finally, infrastructure qualification report for RF3807 can be obtained by contacting RFMD.
Rev A7 DS090504
achieve same I
maintained at 14 mA, and I
value = 43 Ω is called out. In this way, bias R can be calculated for any V
limit for RF3807 = 30 mA.
0.024 * 340 = 3.94 V.
REF
can then be increased > 8 V until I
3
, and compression point can then be considered in obtaining optimum performance for a particular application.
CQ
with V
Theory of Operation and Application Information
CC
= V
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at ([phone] or [e-mail].
CQ
CC
REF
REF
BIAS
drops from nominal value of 112 mA.
= V
REF
.. “Bias Table” on page 5 shows resistor values for V
3
is calculated (or measured with DVM): V
= V
BIAS
when matched for WiMax 2.5 GHz to 2.7 GHz (see “Application Schematic” on page 8)
= 5 V: Bias R = (5 – 3.94)/0.024 = 44 Ω. See “Bias Table” on page 5, standard resistor
TH_JC
REF
= V
CQ
= 5 V.
REF
) is shown versus output power in the graph section of this data sheet. The graph
is restored. I
CC
CC
= 8 V, I
3
= V
= V
/ACP (Adjacent Channel Power for commonly used modulation standards).
BIAS
BIAS
REF
P1dB
= V
= V
REF
= 14 mA, where ambient temperature = 85 °C. Using this curve along
REF
, with ruggedness (survival) into output 4:1 VSWR.
REF
increase to 24 mA is required (as seen in “Bias Table” on page 5).
= 8 V, I
= 8 V. RF3807 can easily be configured for 5 V operation, with a
P1dB
REF
CC
CC
. To ensure reliability for operation at high power, output
= V
/V
= 14 mA, I
BIAS
BIAS
CC
PIN
) and (V
= V
J
= V
= V
for this case yields MTTF > 100 years. Standard
BIAS
REF
CQ
REF
= 112 mA. Target condition will be to
= 5 V is used here to illustrate, operation at
= V
REF
at eval board input – I
REF
CC
), set V
= V
configuration. The maximum I
BIAS
CC
= V
/V
BIAS
REF
= 5 V. Generally speak-
= 5 V, V
RF3807
REF
REF
* bias R = 12.1 –
= 8 V. I
REF
7 of 20
REF
is