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参数资料
| 型号： | AT86RF401U |
| 厂商： | ATMEL CORP |
| 元件分类： | 通信及网络 |
| 英文描述： | Smart RF Wireless Data Microtransmitter |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PDSO20 |
| 封装： | 4.40 X 6.50 MM, 0.65 MM PITCH, TSSOP-20 |
| 文件页数： | 9/52页 |
| 文件大小： | 479K |
| 代理商： | AT86RF401U |
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9
AT86RF401
1424F
–
RKE
–
12/03
Note:
1. Characterized but not guaranteed by test due to dependency on PCB trace antenna
Functional
Description
The complete circuit consists of the following functional blocks.
Transmitter
Crystal Oscillator
The crystal oscillator circuit is designed to work with crystals with fundamental frequen-
cies between 11 and 19 MHz. Forty pF of internal capacitance is connected between
each of the crystal input pins and (chip) ground. Alternatively, an external clock can be
used for these functions.
This circuit provides the master clock for the entire chip. A programmable divider is used
to provide the AVR system clock.
Radio Frequency Power
Amplifier
The RF power amplifier generates a differential output suitable for driving an off-chip
tuned-loop antenna from the PLL output. The PLL output signal is gated using on-off
keyed (OOK) modulation before transmission. It is used as the RF carrier frequency for
the transmitted data stream. The amplifier can be configured via software to reduce the
power output by 36 dB (with 1 dB resolution).
Frequency Synthesizer
The frequency synthesizer utilizes a PLL, which consists of a phase detector, a
÷
24
prescaler, an on-chip loop filter and an integrated VCO. The VCO output is buffered
prior to the output amplifier. The output frequency is 24 times the crystal frequency. To
offset component tolerance, a switched capacitor array is connected between pins 3
and 4 of the VCO. Thirty-two discrete steps of capacitance are available to tune the
VCO control voltage. An internal window comparator monitors the magnitude of the tun-
ing voltage and is used by the AVR core to determine the optimal tuning configuration.
Lock Detector
The lock detection block provides an indication of the state of the phase lock loop (PLL).
Lock condition is determined by counting the number of cycle slips in a given time
Table 4.
Analog/RF Specs
V
DD
= 3.3V; f
XTAL
= 13.125 MHz; f
AVR
= f
XTAL
÷
16; T
A
= 25
°
C unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
RF Amplifier
I
PA
Power Amp Output Current
Transmitting (RF
“
ON
”
), 0 dB Attenuation
–
8.6
–
mA
P
CTLRANGE
Power Control Range
–
36
–
dB
P
CTLRES
Power Control Resolution
–
1
–
dB
Crystal Oscillator
f
OSC
Oscillation Frequency Range
11
–
19
MHz
Frequency Synthesizer/PLL
F
OUT
Output Frequency Range
264
–
456
MHz
P
HARM
1
Harmonics
I/O Pins Static during RF Transmission
Using PCB Trace Antenna
–
60
–
dBc
f
MOD
OOK Modulation Data Rate
Using Manchester Data Bit Encoding
–
–
10
Kbps
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相关代理商/技术参数 |
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| AT86RF401U-6GS | 功能描述:IC MICRO TRANSM RF W/AVR 20TSSOP RoHS:否 类别:RF/IF 和 RFID >> RF 发射器 系列:- 标准包装:4,000 系列:- 频率:310MHz ~ 440MHz 应用:- 调制或协议:UHF，ASK 数据传输率 - 最大:20 kBaud 功率 - 输出:1dBm ~ 5dBm 电流 - 传输:10mA 数据接口:PCB，表面贴装 天线连接器:PCB，表面贴装 存储容量:- 特点:- 电源电压:2.2 V ~ 4 V 工作温度:-40°C ~ 85°C 封装/外壳:16-LSSOP（0.154"，3.90mm 宽） 包装:带卷 (TR) |
| AT86RF401UEK1 | 制造商:Atmel Corporation 功能描述:Smart RF Wireless Data Microtransmitter |
| AT86RF401U-EK1 | 功能描述:射频发射器 Smart RF Micro Trans RoHS:否 制造商:Micrel 类型:ASK Transmitter 封装 / 箱体:SOT-23-6 工作频率:300 MHz to 450 MHz 封装:Reel |
| AT86RF401U-XI | 功能描述:IC MICRO TX RF W/AVR 20-TSSOP RoHS:否 类别:RF/IF 和 RFID >> RF 发射器 系列:- 标准包装:4,000 系列:- 频率:310MHz ~ 440MHz 应用:- 调制或协议:UHF，ASK 数据传输率 - 最大:20 kBaud 功率 - 输出:1dBm ~ 5dBm 电流 - 传输:10mA 数据接口:PCB，表面贴装 天线连接器:PCB，表面贴装 存储容量:- 特点:- 电源电压:2.2 V ~ 4 V 工作温度:-40°C ~ 85°C 封装/外壳:16-LSSOP（0.154"，3.90mm 宽） 包装:带卷 (TR) |
| AT86RF401X | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Smart RF Wireless Data Microtransmitter |
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