Rev. 4572G–DECT–01/04

Features

Amplifier (T7024 and T7026)

Electrostatic sensitive device.

Observe precautions for handling.

Description

The T2803 is an RF IC for low-power applications in the 2.45 GHz ISM band. The

QFN48-packaged IC is a complete transceiver including image rejection mixer, IF

amplifier, FM demodulator, baseband filter, RSSI, TX preamplifier, power-ramping

generator for power amplifiers, integrated synthesizer, fully integrated VCO and Gaus-

sian data filter for TX. No mechanical tuning is necessary in production.

Figure 1. Block Diagram

TANK

PC

RC

GF

CP

VCO

f

: n

f

: n

CTRL

LOGIC

PD

TX/RX

SWITCH

IR MIXER

IF AMP 1

IF AMP 2

DEMOD

BB FILTER

3-WIRE

BUS

DEMOD DAC

RSSI

TX DRIVER

CLOCK

DATA

ENABLE

RX_ON

TX_ON

PU_RX/TX

PU_PLL

TX_DATA

RSSI

BB_OUT

CF

DEMOD

IF_TANK

IF_IN

MIXER

OUT

RF_IN

TX_OUT

VS_VCO

CP

LD

REF_CLK

VTUNE

VREG

VS_REG

REG_CTRL

VREG_VCO

VCO

REG

RAMP

GEN

RAMP_OUT

RAMP_SET

AUX

REG

OLE

PU_REG

GND_VCO

D/A

I_CPSW

RAMP

D/A

2.4 GHz

WDECT/ISM

Single-chip

Transceiver

T2803

Preliminary