收藏 分销(赏)

STX210A--集成编码功能大功率发射芯片.docx

上传人:xrp****65 文档编号:6367881 上传时间:2024-12-06 格式:DOCX 页数:7 大小:520.01KB
下载 相关 举报
STX210A--集成编码功能大功率发射芯片.docx_第1页
第1页 / 共7页
STX210A--集成编码功能大功率发射芯片.docx_第2页
第2页 / 共7页
点击查看更多>>
资源描述
STX210A OOK/ASK/Transmitter Description STX210A is one OOK/ASK transmitter with integrated transmitting data encoder. The circuit working frequency range is about 200MHz-500MHz. The encoder has single external input enable pin. The transmitted bit pattern is consistent with XX1527 encoder. STX210A integrates most transmitter components on-chip and only requires a few external components to work as a transmitter. The STX210A has transmission data encoder, low supply detection, and long-time mis-transmission shutdown protection features. Features • Working frequency range: 200MHz-500MHz. • Tunable output power: 15dBm @ 5V with 50 ohm load, typ. • Transmitted data pattern consistent with XX1527 encoder. • Wide supply voltage: 2.3V-5.5V for 315/433MHz. • Low supply voltage detection • Automatic shutdown protection Applications • Wireless Door-bell. • Remote Control, Garage door and gate openers • AMR-Automatic Meter Reading • Wireless alarm and security system. Block Diagram 锐迪芯电子 STX210A OOK/ASK/Transmitter Pin Configuration Table 1. Pin Description Pin Symbol I/O Description 1 VSSA IO RF Gound 2 POUT O Transmitted RF output, can stand 20V DC voltage. 3 VDCC LDO Power for dig part, connected ext bypass cap. 4 RATE IO Ext connected res, Control TX data rate 5 D1 I Transmit input control, active high, default low 6 VACC IO LDO Power for RF part, connected ext bypass cap. 7 VDDA IO Vdd for whol chip 8 XI I Input terminal of local oscillation signal. It is connected to the crystal or driven by an external clock. Table 2. Absolute Maximum Rating Item Rating Supply Voltage, VDD + 5.6V Inputs and Clock Outputs - 0.5V to + 5.6V Pout pin -0.5V to +20V Storage Temperature - 65 to + 150 oC Soldering Temperature + 260 oC STX210A OOK/ASK/Transmitter Table 3. Electrical Specifications Parameter Symbol Test Condition Min Typ Max Unit Supply V 2.2 5.5 V Voltage 200MHz-500MHz DD Supply I Fout=434MHz, 13dBm , 3V 15 mA Current DD Fout=434MHz, 18dBm , 5V 25 mA RF Power Pratio 200MHz-500MHz dB On/Off Ratio 60 Pout supply Pvol 200MHz-500MHz 12 V voltage Transmitted Pout Fin=315MHz , Vdd=5V 20 dBm Power Fin=434MHz , Vdd=5V 20 dBm Data Rate OOK/ASK mode 0.5 20 Kb/s OSCI operating F 9 10 20 MHz Frequency OSC Operating T -40 27 85 ℃ Temperature a Leakage I Power down mode 1 uA Current SB Typical Application Circuit I —315/433MHz Transmitter STX210A OOK/ASK/Transmitter Functional Description Crystal Oscillator The crystal oscillator circuit consists of a colpit oscillator. Pin 8 can drive one off-chip 9MHz-30MHz crystal without external capacitors required. The driving capacitors are integrated on Chip. The crystal driver stage can also take input clock as input clock buffer. The crystal oscillator frequency is determined as follows fosc= fvco / 32 Where Fvco is VCO oscillation frequency. 32 is PLL divider value. Below table lists the required Crystal frequency. The suggested crystal ESR must be less than 50Ω. Transmitting Frequency Crystal Frequency Note (MHz) (MHz) 315 9.844 340 10.625 390 12.188 433.92 13.56 PLL Block The PLL consists of phase-frequency detector (PFD), charge pump, loop filter, voltage-controlled oscillator (VCO), and divider (32). The PFD compares two signals and produces an error signal which is proportional to the two signal phase difference. The error signal is used to control the VCO to run fast or slow. The VCO oscillation frequency range is tunable between200MHz-500MHz. OOK/ASK Modulation The OOK/ASK modulation is done by external Pin D1. D1 turn on/off the power amplifier when D1 is high or low. The PLL loop is on no matter DIN is high and low. However, to save power, the whole chip is turned off after D1 stay in low over one million crystal oscillation cycles. That is about 100ms for 10MHz crystal. When D1 is high, the whole chip is powered up. The On/Off power ratio is larger than 60dB. STX210A OOK/ASK/Transmitter TX RATE CONTROL The transmitting rate is controllable with external control pin RATE connected with different resistor. Below table lists the transmitting rate with different ext resistor. The bit rate changes less with supply voltage. Table x The transmitting time vs external resistor when pins D1 is hold at high. Ext Resistor Vcc=2.5V , Vcc=2.5V , note (K.Ω) 1T Bit width Bit Rate (ms), (kb/s) 220 0.12 8.0 330 0.16 6.0 470 0.25 4.0 690 0.34 3.0 1000 0.50 2.0 Fig. 1 Transmitting bit rate vs Supply voltage and ext bias resistor. STX210A OOK/ASK/Transmitter RF OUTPUT The ANT pin can be matched to 50 Ohm with a Π-type circuit. The supply voltage can be as high as 12V. Below table is suggested inductor and capacitor value for different frequency. Frequency L1 L2 C1 C2 C3 C4 R1 Note (MHz) (nH) (nH) (uF) (pF) (pF) (pF) (Ω) 315 470 100 1.0 NC NC 10 100 433 470 82 1.0 NC NC 5 100 ENCODER The chip integrates the control data encoder. The transmitted data pattern is encoded within the internal OTP encoder. The data pattern is consistent with market available product XX1527. STX210A OOK/ASK/Transmitter Package Information SOP-8
展开阅读全文

开通  VIP会员、SVIP会员  优惠大
下载10份以上建议开通VIP会员
下载20份以上建议开通SVIP会员


开通VIP      成为共赢上传
相似文档                                   自信AI助手自信AI助手

当前位置:首页 > 环境建筑 > 其他

移动网页_全站_页脚广告1

关于我们      便捷服务       自信AI       AI导航        抽奖活动

©2010-2025 宁波自信网络信息技术有限公司  版权所有

客服电话:4009-655-100  投诉/维权电话:18658249818

gongan.png浙公网安备33021202000488号   

icp.png浙ICP备2021020529号-1  |  浙B2-20240490  

关注我们 :微信公众号    抖音    微博    LOFTER 

客服