- 您现在的位置：买卖IC网 > Datasheet目录503 > RFRXD0920-I/LQ (Microchip Technology)MODULE RCVR 868/915MHZ ASK/FSK Datasheet资料下载
参数资料
| 型号： | RFRXD0920-I/LQ |
| 厂商： | Microchip Technology |
| 文件页数： | 5/32页 |
| 文件大小： | 0K |
| 描述： | MODULE RCVR 868/915MHZ ASK/FSK |
| 产品变化通告： | RFRXD0(4,9)20I/LQ Obsolescence 07/Mar/2012 |
| 标准包装： | 250 |
| 频率： | 800MHz ~ 930MHz |
| 灵敏度： | -106dBm |
| 数据传输率 - 最大： | 80 kbps |
| 调制或协议： | ASK，FM，FSK |
| 应用： | 家庭自动化，遥感，RKE |
| 电流 - 接收： | 9.2mA |
| 数据接口： | PCB，表面贴装 |
| 天线连接器： | PCB，表面贴装 |
| 电源电压： | 2.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 32-LQFP |
| 供应商设备封装： | 32-LQFP（7x7） |
| 包装： | 托盘 |
第1页第2页第3页第4页当前第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页
rfRXD0420/0920
2.0
CIRCUIT DESCRIPTION
The PLL consists of a phase-frequency detector,
charge pump, voltage-controlled oscillator (VCO), and
This section gives a circuit description of the internal
circuitry of the rfRXD0420/0920 receiver. External
connections and components are given in the
APPLICATION CIRCUITS section.
fixed divide-by-16 (rfRXD0420) or divide-by-32
(rfRXD0920) divider. The rfRXD0420/0920 employs a
charge pump PLL that offers many advantages over
the classical voltage phase detector PLL: infinite pull-in
2.1
Bias Circuitry
range and zero steady state phase error. The charge
pump PLL allows the use of passive loop filters that are
Bias circuitry provides bandgap biasing and circuit
shutdown capabilities. The ENRX (Pin 28) modes are
summarized in Table 2-1. The ENRX pin is a CMOS
compatible input and is internally pulled down to Vss.
TABLE 2-1: BIAS CIRCUITRY CONTROL
lower cost and minimize noise. Charge pump PLLs
have reduced flicker noise thus limiting phase noise.
An external loop filter is connected to pin LF (Pin 29).
The loop filter controls the dynamic behavior of the
PLL, primarily lock time and spur levels. The applica-
tion determines the loop filter requirements.
ENRX (1)
0
Description
Standby mode
The VCO gain for the rfRXD0420/0920 receivers are
listed in Table 2-2.
1
Receiver enabled
TABLE 2-2:
PLL PARAMETERS
Note 1: ENRX has internal pull-down to Vss
Device
K VCO(1)
I CP(1)
Divider
2.2
Frequency Synthesizer
rfRXD0420
250 MHz/V at
433 MHz
60 μ A
16
The Phase-locked Loop (PLL) frequency synthesizer
rfRXD0920
300 MHz/V at
60 μ A
32
generates the Local Oscillator (LO) signal. It consists
of:
868 MHz
Note 1: Typical value
?
Crystal oscillator
?
?
Phase-frequency detector and charge pump
Voltage Controlled Oscillator (VCO)
The LF pin is illustrated in Figure 2-2.
?
Fixed feedback divider:
- rfRXD0420 = divide by 16
FIGURE 2-2:
BLOCK DIAGRAM OF LOOP
FILTER PIN
- rfRXD0920 = divide by 32
2.2.1
CRYSTAL OSCILLATOR
V DD
200 ?
The internal crystal oscillator is a Colpitts type oscilla-
LF
tor. It provides the reference frequency to the PLL. A
crystal is normally connected to the XTAL (Pin 26) and
ground. The internal capacitance of the crystal oscilla-
29
V SS
400 ?
4 pF
tor is 15 pF. Alternatively, a signal can be injected into
the XTAL pin from a signal source. The signal should
be AC coupled via a series capacitor at a level of
V SS
V SS
approximately 600 mV pp .
The XTAL pin is illustrated in Figure 2-1.
2.3
Low Noise Amplifier
The Low-Noise Amplifier (LNA) is a high-gain amplifier
FIGURE 2-1:
BLOCK DIAGRAM OF
XTAL PIN
whose primary purpose is to lower the overall noise
figure of the entire receiver thus enhancing the receiver
sensitivity. The LNA is an open-collector cascode
design. The benefits of a cascode design are:
XTAL
26
V DD
V SS
V DD
50 k ?
30 pF
30 pF
V DD
40 μ A
?
?
?
?
high gain with low noise
high-frequency
wide bandwidth
low effective input capacitance with stable input
impedance
? high output resistance
V SS
V SS
? high reverse isolation that provides improved
stability and reduces LO leakage
? 2003 Microchip Technology Inc.
Preliminary
DS70090A-page 5
相关PDF资料 |
PDF描述 |
|---|---|
| RHK005N03T146 | MOSFET N-CH 30V 500MA SOT-346 |
| RHP020N06T100 | MOSFET N-CH 60V 2A SOT-89 |
| RHP030N03T100 | MOSFET N-CH 30V 3A SOT-89 |
| RI-TRP-WEHP-30 | RFID GLASS TRANSP R/W 80BIT 23MM |
| RJ45-XLRM | CONVERTER LEAD RJ45-XLR MALE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| RFRXD0920T-I/LQ | 功能描述:射频收发器 32 LD 800-930 MHz RF RoHS:否 制造商:Atmel 频率范围:2322 MHz to 2527 MHz 最大数据速率:2000 Kbps 调制格式:OQPSK 输出功率:4 dBm 类型: 工作电源电压:1.8 V to 3.6 V 最大工作温度:+ 85 C 接口类型:SPI 封装 / 箱体:QFN-32 封装:Tray |
| RFS04ZG-M6 | 制造商:Power-One 功能描述: |
| RFS04ZG-M6G | 制造商:Power-One 功能描述:RFS Series 20 W Single Output 5 V DC/DC Converter Power Supply - Surface Mount |
| RFS062PJ150CS | 功能描述:RES ARRAY 2 RES 15 OHM 0603 制造商:samsung electro-mechanics 系列:RFS 包装:剪切带（CT） 零件状态:在售 电路类型:隔离 电阻（欧姆）:15 容差:±5% 电阻器数:2 引脚数:4 每元件功率:31.25mW 温度系数:±200ppm/°C 工作温度:-55°C ~ 125°C 应用:- 安装类型:表面贴装 封装/外壳:0302（0805 公制），长边端子 供应商器件封装:603 大小/尺寸:0.032" 长 x 0.024" 宽（0.80mm x 0.60mm） 高度 - 安装（最大值）:0.013"（0.33mm） 标准包装:1 |
| RFS062PJ220CS | 功能描述:RES ARRAY 2 RES 22 OHM 0603 制造商:samsung electro-mechanics 系列:RFS 包装:剪切带（CT） 零件状态:在售 电路类型:隔离 电阻（欧姆）:22 容差:±5% 电阻器数:2 引脚数:4 每元件功率:31.25mW 温度系数:±200ppm/°C 工作温度:-55°C ~ 125°C 应用:- 安装类型:表面贴装 封装/外壳:0302（0805 公制），长边端子 供应商器件封装:603 大小/尺寸:0.032" 长 x 0.024" 宽（0.80mm x 0.60mm） 高度 - 安装（最大值）:0.013"（0.33mm） 标准包装:1 |
发布紧急采购，3分钟左右您将得到回复。