RF2722_1 Datasheet, PDF (12/26 Pages) RF Micro Devices – GSM/GPRS/EDGE RECEIVER

RF2722
Proposed
Pin Function Description
13 TXB OUT HB ^{High band TX buffer output.}
Interface Schematic
TXB OUT HB
14
VT
Tuning control line for the VCO. Analog input.
15
VTC
Coarse VCO tuning control driven by RF6001. Digital input.
16
VCO VCC ^{Supply for the RF VCO.}
17
TXB IN LB ^{TX buffer low band input. This is a high impedance voltage-driven input}
designed to be driven by the RF6001/3 TXVCO output.
18
TXB IN HB ^{TX buffer high band input. This is a high impedance voltage-driven input}
designed to be driven by the RF6001/3 TXVCO output.
19
TX EN
TX buffer enable. If the TX SEL (CRX1[2]) bit is set high, the TX buffers are
enabled by this pin. If the TX SEL bit is set low, this pin has no effect on the
activation of the TX buffers. (See register map for more information.) The
TX buffers are enabled by setting this pin high. The TX buffers are disabled
by setting this pin low.
20
Q OUT
Q-channel differential IF output.
VCO VCC
VT
VCO VCC
VTC
VCO VCC
LOAD
Q OUT
21
QB OUT ^{Complementary output to Q OUT.}
QB OUT
22
IB OUT
Complementary output to I OUT.
IB OUT
23
I OUT
I-channel differential IF output.
I OUT
24 DIG/FLT VCC ^{Supply for all digital circuitry.}
Supply for the filter.
DIG/FLT VCC
LOAD
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Rev A4 DS050919