T2803 View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

T2803

2.4 GHz WDECT/ISM Single-chip Transceiver

Atmel Corporation 

Features

• Supply-voltage Range 3V to 4.6V (Regulated)

• Auxiliary Voltage Regulator On-chip (3.2V to 4.6V)

• Low Current Consumption

• Few Low-cost External Components

• No Mechanical Tuning Required

• Supports Multiple Reference Clocks (10.368 MHz/13.824 MHz)

• Fast Settling Synthesizer (864 kHz Channel Spacing)

• TX Preamplifier with 3 dBm Output Power at 2.45 GHz

(4 Programmable Power Levels)

• Ramp-signal Generator for Power Ramping and Power Control of

External SiGe Power Amplifier (T7024 and T7026)

Electrostatic sensitive device.

Observe precautions for handling.

2.4 GHz

WDECT/ISM

Single-chip

Transceiver

1. 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 1-1. Block Diagram

MIXER

OUT IF_IN

IF_TANK

IR MIXER

IF AMP 1

IF AMP 2

RF_IN

RAMP_OUT

RAMP_SET

RAMP

GEN

RAMP

D/A

RSSI

DEMOD

TANK

CF

DEMOD

BB FILTER

D/A DEMOD DAC

TX/RX

SWITCH

VCO

GF

BB_OUT

RSSI

TX_DATA

TX_OUT

PC

PD

f

:n

TX DRIVER

VCO

REG

CP

AUX

REG

3-WIRE

BUS

RC

f

:n

CTRL

LOGIC

CLOCK

DATA

ENABLE

RX_ON

TX_ON

PU_RX/TX

PU_PLL

T2803

VREG_VCO VS_VCO

VREG VS_REG

OLE

GND_VCO PU_REG REG_CTRL VTUNE

CP

LD

I_CPSW

REF_CLK

Rev. 4572I–DECT–07/05

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