RF133 Conexant Systems, Inc., RF133 Datasheet

RF133

Manufacturer Part Number

RF133

Description

Manufacturer

Conexant Systems, Inc.

Datasheet

1.RF133.pdf (17 pages)

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RF133

RF/IF Transceiver For GSM Applications

The RF133 RF/IF Transceiver is a highly integrated, monolithic device optimized

for use in GSM and other TDMA single-band or multi-band applications.

The receive path of the device consists of three Intermediate Frequency (IF)

amplifiers with selectable gain, an I/Q demodulator, baseband filters, DC offset

compensation circuitry, and selectable gain baseband amplifiers.

The transmit path of the device consists of an I/Q modulator and a frequency

translation loop designed to perform frequency up-conversion with high output

spectral purity. The translation loop consists of a phase/frequency detector, a

charge-pump, a mixer, and buffers for the required isolation between the RF input,

Local Oscillator (LO), and IF inputs.

The device package and pin configuration are shown in Figure 1. A block diagram

of the RF133 is shown in Figure 2. The signal pin assignments and functional pin

descriptions are found in Table 1.

Data Sheet

TXIFIN+

TXIFIN–

TLCPO

TXQ+

TXQ–

GND

VCC

TXI+

TXI–

Figure 1. RF133 Pin Configuration – 48-pin TQFP

48 47 46 45 44 43 42 41 40 39 38 37

13 14 15 16 17 18 19 20 21 22 23 24

Proprietary Information and Specifications are Subject to Change

Conexant

C100a

DATA

RXIFF+

RXIFF–

SXENA

BPC

GND

VCC

RES2

RES1

VCC

LPFADJ

VCC

Features

Applications

Quadrature demodulator for downconversion

80 dB IF gain range and 30 dB baseband gain

range

Integrated receive baseband filters with tunable

bandwidth

Integrated transmit path with high phase accuracy

Reduced filtering requirements for the transmit path

Broad RF and IF range for multi-band operation

Integrated selectable local oscillator dividers/phase

shifters and selectable high/low-side injection for

frequency plan flexibility

On-chip second local oscillator

Separate enable lines for transmit, receive, and

synthesizer modes for power management

48-pin Thin Quad Flat Pack (TQFP) package (7mm

x 7mm)

GSM900/DCS1800/PCS1900 digital cellular

telephony

Multi-mode, multi-band terminals

October 8, 1999

100776A

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