RF3867TR7 RFMD, RF3867TR7 Datasheet - Page 9

• Manufacturer Part Number: RF3867TR7
• Description: IC AMP LOW-NOISE DUAL-CH 20-QFN
• Manufacturer: RFMD

Specifications of RF3867TR7

• Current - Supply: 180mA
• Frequency: 700MHz ~ 3.8GHz
• Gain: 10dB
• Noise Figure: 0.8dB
• P1db: 21dBm
• Package / Case: 20-QFN
• Rf Type: Cellular, CDMA, PCS, DCS, UMTS, WLAN, 802.16/WiMax
• Test Frequency: 3.3GHz ~ 3.8GHz
• Voltage - Supply: 2.5V ~ 6V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Low noise figure/high IP3 make the RF3867 ideal for use as a dual channel receive LNA/transmit driver for cellu-
lar/DCS/PCS/UMTS and WiMax platforms in addition to many other general purpose applications. Standard evaluation boards
cover 700MHz to 1100MHz, 1500MHz to 2700MHz, and 3300MHz to 3800MHz. RF3867 functions as a dual channel
RF3863 equivalent.
Viewing the data sheet evaluation board schematic, refer to below for purpose/function of external components as they apply
to each channel/path:
• L3/C5/C3 (L4/C6/C2): Placed to optimize input match and enhance out of band low frequency stability.
• R2 (R3): Optionally placed to increase bias current and IP3. 20Ω value is found to be the best case (see graph section of
• L2/C8 (L1/C4): Influence output return loss.
RF3867 has internal DC-blocking capacitors at the RFin/RFout. In addition, impedance has been shown to be seen looking out
at pins 17/19 (7/9) influence response. As a result, two port s-parameters become non-applicable. In the event matching is
desired for frequency bands outside of those provided with standard evaluation boards, the following approach can be used:
• Start with matching seen for standard evaluation board closest to desired band of operation.
• Optimize values at L3/C3/L2/C8 (L4/C2/L1/C4) to obtain response/performance.
Rev A4 DS091119
the RF3863 data sheet).
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at ([phone] or [e-mail].
Theory of Operation
RF3867
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