Document
QN8007B/8007LB
High Performance Digital FM Transmitter for Portable Devices
____________________________ General Description ________________________
The QN8007 is a high performance, low power, full-featured single-chip stereo FM transmitter designed for portable audio/video players, automotive accessories, cell phones, and GPS personal navigation devices. It integrates transmitting functions, clear channel scan, and antenna tuning to ease matching in real applications. Advanced digital architecture enables variable input gain programming; selectable pre-emphasis, precision low-spur MPX stereo encoding and pilot tone generation, low-noise PLL-based modulation, and an on-chip power amplifier with variable output level and RF band-pass filtering to ensure optimum transmit spectrum purity.
With its small footprint, minimal external component count and multiple clock frequency support, the QN8007 is easy to integrate into a variety of small form-factor low power portable applications. An integrated voltage regulator enables direct connection to a battery and provides high PSRR for superior noise suppression. A low-power Standby mode extends battery life. ESD protection is on all pins. The QN8007 is fabricated in highly reliable CMOS technology.
_____________________________ Key Features _____________________________
Worldwide FM Band Transmit • 76 MHz to 108 MHz full band tuning in 50/100/200 kHz step sizes • 50/75s pre-emphasis
High Performance FM Transmitter (FMT) • 66dB Stereo SNR, 0.03% THD • Maximum 121dBµV RF output level with 42dB adjustable range • Integrated Clear Channel Scan
RDS/RBDS Transmit • Supports US and European data service, including TMC (Traffic Messaging Channel) (not available in QN8007L)
Flexible Audio Interfaces • Digital audio interface supports I2S and a variety of PCM data formats with 4 different data rates • Programmable analog audio input/output • Integrated audio AGC and soft clipping
Very Low Power Consumption • 9.2 mA • Integrated voltage regulator, direct connect to battery • Power saving idle and standby modes • Low shutdown leakage current
Ease of Integration • Small footprint, 4 x 4 x 0.85mm QFN24 • Only 2 external passive components required • Adaptive antenna tuning • Low cellular and GPS band spurs • High Immunity to TDMA (GSM/GPRS) burst noise • Multiple crystal frequencies supported • 2-wire and 3-wire control interfaces
Robust Operation • -250C to +850C operation • ESD protection on all input and output pads
_____________________________ Typical Applications __________________________
Cell Phones / PDAs / Smart Phones Portable Audio & Media Players
GPS Personal Navigation Devices Automotive and Accessories
Rev 2.09 (11/09)
Confidential A
Copyright ©2009 by Quintic Corporation
Confidential Information contained herein is covered under Non-Disclosure Agreement (NDA).
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QN8007B/8007LB
CONTENTS
1 Functional Block Diagram ..............................................................................................................................4
2 Pin Assignments ..............................................................................................................................................5
3 Electrical Specifications ..................................................................................................................................7 3.1 I2S Interface Timing................................................................................................................15
4 Functional Description ..................................................................................................................................17 4.1 Transmit Mode........................................................................................................................17 4.2 Idle and Standby Mode ...........................................................................................................17 4.3 Audio Interface .......................................................................................................................17 4.4 Audio Processing ....................................................................................................................18 4.5 Channel Setting.......................................................................................................................18 4.6 RDS/RBDS .............................................................................................................................19
5 Control Interface Protocol .............................................................................................................................20 5.1 2-wire Serial Control Interface ...............................................................................................20 5.2 3-Wire Serial Control Interface...............................................................................................21
6 Digital Audio Interface Protocol ......