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| Product Categories | |
| FM Series | |
| QN8005 | |
| QN8006 | |
| QN8007 | |
| QN8025 | |
| QN8027 | |
| QN8035 | QN8026 | QN8036 | ATV Series |
| QN8610 | |
| ATV Field Test Video | |
QN8027 |
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General Description 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 allow 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 QN8027s 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. Key Features . Worldwide FM Band Transmit . 76 MHz to 108 MHz full band tuning in
50/100/200 kHz step sizes
. Ease of Integration . Small footprint, 3 x 3 x 0.95mm MSOP10 . Low Power Consumption . 7.0 mA of FCC output level. Integrated voltage regulator, direct connect to battery . Power saving IDLE mode . High Performance FM Transmitter (FMT) .
65dB Stereo SNR, 0.04% THD . 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 Typical Applications .
Cell Phones / PDAs / Smart Phones
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