QN8027
High Performance Digital FM Transmitter for Portable Devices
Rev 0.26 (04/09) Copyright ©2009 by Quintic Corporation Page 1
Confidential Information contained herein is covered under Non-Disclosure Agreement (NDA). Advance Technical Information.
This is a product under development. Characteristics and specifications are subject to change without notice.
________ General Description ________
___________ Key Features __________
The QN8027 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. The
QN8027 covers frequencies from 76 MHz to 108 MHz in
50/100/200 kHz step sizes for worldwide FM band support.
The QN8027 also supports RDS/RBDS data transmit.
The QN8027 integrates a complete transmitter function,
from stereo audio input to RF antenna port, for worldwide
FM band personal area broadcasting. It includes 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.
An integrated crystal oscillator and on-chip digital
calibration circuits eliminate external tuning components
and enable tuning-free manufacturing. Support for
12/24MHz reference clocks allows the chip to use readily
available system clocks. Integrated saturation detection and
a programmable audio interface eliminate distortion,
optimize audio fidelity, and support a wide range of input
audio levels. A low power IDLE mode extends battery life.
An integrated LDO enables direct connection to the battery
and provides high PSRR for superior noise suppression, in
particular TDMA noise from GSM/GPRS phones.
The QN8027’s small footprint, high integration with
minimum external component count, and support for
12/24MHz clock frequencies make it easy to integrate into
a variety of small form-factor low-power portable
applications. Integrated low-phase noise digital
synthesizers and extensive on-chip auto calibration ensures
robust consistent performance over temperature and
process variations. An integrated voltage regulator enables
direct connection to a battery and provides high PSRR for
superior noise suppression. A low-power IDLE mode
extends battery life.
ESD protection is on all pins. The QN8027 is fabricated in
highly reliable CMOS technology.
• Worldwide FM Band Transmit
• 76 MHz to 108 MHz full band tuning in
50/100/200 kHz step sizes
• 50/75
µ
s pre-emphasis
• Ease of Integration
• Small footprint, 3 x 3 x 0.95mm MSOP10
• 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
• I
2
C interface
• Very Low Power Consumption
• 6.5 mA of FCC output level
• Integrated voltage regulator, direct connect to battery
• Power saving IDLE mode
• High Performance FM Transmitter (FMT)
• 63dB Stereo SNR, 0.05% THD
• Maximum 121 dBuVp RF output level with 42dB
adjustable range
• Automatic Input Audio Sensing
• RF power automatically turned off if no input
audio signal for 60s
• RDS/RBDS Transmit
• Supports US and European data service,
including TMC (Traffic Messaging Channel)
• Robust Operation
• -25
0
C to +85
0
C 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
