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QN8027 Datasheet PDF - Quintic

Part Number QN8027
Description High Performance Digital FM Transmitter
Manufacturers Quintic 
Logo Quintic Logo 

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QN8027
High Performance Digital FM Transmitter for Portable Devices
________ 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
50/75µs 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
I2C 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
-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 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.
Free Datasheet http://www.datasheet4u.com/

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QN8027 equivalent
2 PIN ASSIGNMENTS
QN8027
XTAL2
XTAL1
VCC
GND
RFO
1
2
3
4
5
10 ALI
9 ARI
8 VIO
7 SDA
6 SCL
(Top View)
Figure 2: QN8027 Device Pin Out
Table 1: Pin Descriptions
PINS
1
2
3
4
5
6
7
8
9
10
NAME
XTAL2
XTAL1
VCC
GND
RFO
SCL
SDA
VIO
ARI
ALI
DESCRIPTION
On-chip crystal driver port 2.
If using an external clock source, connect this pin to ground.
On-chip crystal driver port 1.
If using an external clock source, connect this pin to inject the clock.
Voltage supply
Ground
Transmitter RF output – connect to matched antenna.
Clock for I2C serial bus.
Bi-directional data line for I2C serial bus.
IO voltage – specifies voltage limit for all digital pins.
Analog audio input – right channel
Analog audio input – left channel
Rev 0.26 (04/09)
Copyright ©2009 by Quintic Corporation
Page 5
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.
Free Datasheet http://www.datasheet4u.com/


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