深圳市桑尼奇科技有限公司

 QN8027 High Performance Digital FM Transmitter for Portable Devices

1、芯片描述：

The QN8027 is a high performance, low power, fullfeatured 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 noi se 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 fabri highly reliable CMOS technology（点击即可咨询芯片详细信息）.

2、芯片的特性：

• 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

3、芯片应用场景:

• Cell Phones / PDAs / Smart Phones •  Portable Audio & Media Players   • GPS Personal Navigation Devices •  Automotive and Accessories  

4、应用框图：

5、封装图（角位）：

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