TCM4300IPZ datasheet(7/69 Pages) TI1

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1 Introduction

Texas Instruments (TI

) TCM4300 IS-54B advanced RF cellular telephone interface circuit (ARCTIC)

provides a baseband interface between the digital signal processor (DSP), the microcontroller, and the RF

modulator/demodulator in a dual-mode IS-54B cellular telephone. See the TCM4300 functional block

diagram.

In the analog mode, the TCM4300 provides all required baseband filtering as well as transmit D/A

conversion and receive A/D conversion using dual 10-bit sigma-delta converters. In addition, a wide-band

data (WBD) –10 kb/s Manchester frequency shift key (FSK) demodulator is provided to allow reduced DSP

processing load during subscriber standby mode.

In the digital mode, the TCM4300 accepts I and Q baseband data and performs A/D and D/A conversion

and square-root raised-cosine filtering using dual 10-bit sigma-delta converters. The TCM4300 also has a

π/4-DQPSK modulation encoder for dibit-to-symbol conversion in the digital transmit mode.

The microcontroller interface is compatible with a wide range of microcontrollers. A microcontroller can be

used to communicate with the user interface (keyboard, display, etc.) and to program up to three frequency

synthesizers by using the on-chip synthesizer interface circuit.

The TCM4300 provides advanced power control to minimize the power consumption of many dual-mode

telephone functional blocks such as the speech codec, FM receiver, I and Q demodulator, transmitter signal

processor, and RF power amplifier. In addition, the TCM4300 is designed to reduce system power

consumption through low-voltage operation and standby mode.

The TCM4300 is offered in the 100-pin PZ package and is characterized for free-air operation from

– 40

°C to 85°C.

1.1

Features

•

Compliance With TIA IS-54B Dual-Mode Cellular Standard

•

Baseband Transmit Digital-to-Analog (D/A) Conversion and Receive Analog-to-Digital (A/D)

Conversion in Analog Transmit Mode Using Dual 10-Bit Sigma-Delta Converters

•

Square Root Raised Cosine (SQRC) Filtering in the Digital Mode Using Dual 10-Bit Sigma-Delta

Converters

•π/4-Differential Quadrature Phase-Shift Key (DQPSK) Modulation Encoder in Digital Transmit

Mode

•

Power Control Supervision for Radio Frequency (RF) Power Amplifier, Automatic Frequency

Control (AFC), Automatic Gain Control (AGC), and Synthesizer

•

Received Signal Strength Indicator (RSSI) and Battery-Level A/D Conversion Circuitry

•

Internal Clock Generation

•

WBD Clock Recovery and Manchester Decoding

•

General-Purpose DSP and Microcontroller Interface

•

3.3-V and 5-V Operation

•

Low Power Consumption

TI and ARCTIC are trademarks of Texas Instruments Incorporated.

TCM4300IPZ Datasheet(PDF) 7 Page - Texas Instruments

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