cx74063-26 Skyworks Solutions, Inc., cx74063-26 Datasheet - Page 8

• Manufacturer Part Number: cx74063-26
• Description: Transceiver Multi-band Gprs, Edge Applications With Power Ramping Controller Integrated Crystal Oscillator With Output
• Manufacturer: Skyworks Solutions, Inc.

Data Sheet I CX74063-26
Technical Description
The CX74063-26 transceiver contains the following sections,
as shown in Figure 2.
• Receive section. Includes three integrated LNAs, a
• Synthesizer section. Includes an integrated on-chip VCO
• Transmit section. The TX path is a translational loop
8
MAY 16, 2003
quadrature demodulator section that performs direct down
conversion, baseband amplifier circuitry with I/Q outputs,
and three stages of DC offset correction. The receiver can
be calibrated to optimize IP2 performance.
locked by a fractional-N synthesizer loop, and a crystal
oscillator to supply the reference frequency.
architecture consisting of an I/Q modulator, integrated high
power VCOs, offset mixer, programmable divider, PFD, and
charge pump. The device also provides integrated gain
controller for the PAC loop, plus the bias generator for an
external diode detector.
Pin #
48
49
50
51
52
53
54
55
56
RXQN
RXQP
RXIN
RXIP
VCC4
VCCTXVCO
TX900
TX1800/TX1900
TXVCOTUNE
[781] 376-3000 I FAX [781] 376-3100 I [e-mail] I WWW.SKYWORKSINC.COM
Name
Skyworks Solutions, Inc., Proprietary and Confidential
Table 1. CX74063-26 Signal Descriptions (5 of 5)
Receiver output Q negative
Receiver output Q positive
Receiver output I negative
Baseband supply
Transmit VCO supply
Low band transmit VCO
DCS and PCS transmit VCO output
Transmit VCO control input
Receiver output I positive
Description
A 3-wire serial interface controls the transceiver and
synthesizer. The receiver gain control, as well as the division
ratios and charge pump currents in the synthesizer and
transmitter, can be programmed using 24-bit words. These
24-bit words are programmed using the 3-wire input signals
CLK, DATA, and LE. Pin 43 (VDDBB) is provided for the digital
sections to allow power supply operation compatible with
modern digital baseband devices. VDDBB is also used to
supply registers 0 through 5 to maintain programmed values.
The TXENA, RXENA, and SXENA signals separately enable the
CX74063-26 transmitter, receiver, and synthesizer sections.
TXENA and RXENA should be held low during programming.
SXENA should be held high during the programming of
register 3 (IP2 calibration). (These timing signals are detailed in
Figures 9, 10, and 11.)
Equivalent Circuit
VCCTXVCO
VCC4
103052A