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參數(shù)資料
| 型號(hào)： | MICRF112YMM10 |
| 廠商： | MICREL INC |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | QwikRadio㈢ UHF ASK/FSK Transmitter |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO10 |
| 封裝： | MSOP-10 |
| 文件頁數(shù)： | 13/20頁 |
| 文件大小： | 537K |
| 代理商： | MICRF112YMM10 |
Micrel, Inc.
MICRF112
March 2007
13
M9999-030107
(408) 944-0800
Crystal Oscillator for FSK Operation
Figure 5 shows reference oscillator circuit con
fi
guration
for FSK operation. To operate the MICRF112 in FSK
mode, one additional capacitor is needed between
XTALOUT pin and XTALMOD pin. Crystal parameters
for FSK operation are the same as ASK operation
except:
When the ESR of crystal is at 20
, C
FSK
+ C
LOAD
not to exceed 70pF.
When the ESR of crystal is at 300
, C
FSK
+
C
LOAD
not to exceed 30pF
Figure 5. Reference Oscillator FSK Operation
PLL ×32
The function of PLL×32 is to provide a stable carrier
frequency for transmission. It is a “divided by 32” phase
locked oscillator.
Power Amplifier
The power amplifier serves two purposes: 1) to buffer
the VCO from external elements and 2) to amplify the
phase locked signal. The power amplifier can produce
+10dBm at 3V (typical).
Enable Control
Enable control gates the ASK data. It only allows
transmission when Lock, Amplitude and Under Voltage
Detect conditions are valid.
Under Voltage Detect
“Under voltage detect” block senses operating voltage.
If the operating voltage falls below 1.6V, “under voltage
detect” block will send a signal to “enable control” block
to disable the PA.
Open Drain Switch
Open drain switch is used for FSK operation. FSK data
is fed into the FSK pin. The FSK pin is connected to the
gate of the open drain switch. The open collector is
connected to the XTALMOD pin. In Figure 4, a capacitor
is shown connected from XTALMOD pin to XTALOUT.
When FSK pin goes high, the capacitor between
XTALMOD and XTALOUT pulls the frequency of
REFOSC low .
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參數(shù)描述 |
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| MICRF112YMU TR | 功能描述:射頻發(fā)射器 300MHz to 450MHz ASK/FSK Transmitter RoHS:否 制造商:Micrel 類型:ASK Transmitter 封裝 / 箱體:SOT-23-6 工作頻率:300 MHz to 450 MHz 封裝:Reel 工作電源電壓: 最大工作溫度: 安裝風(fēng)格: |
| MICRF112YMU-TR | 功能描述:RF Transmitter ASK, FSK 300MHz ~ 450MHz 10dBm 50kbps PCB, Surface Mount Antenna 10-XFDFN Exposed Pad 制造商:microchip technology 系列:QwikRadio? 包裝:剪切帶（CT） 零件狀態(tài):停產(chǎn) 頻率:300MHz ~ 450MHz 應(yīng)用:RKE，TPM 調(diào)制或協(xié)議:ASK，F(xiàn)SK 數(shù)據(jù)速率（最大值）:50kbps 功率 - 輸出:10dBm 電流 - 傳輸:11mA 數(shù)據(jù)接口:PCB，表面貼裝 天線連接器:PCB，表面貼裝 存儲(chǔ)容量:- 特性:- 電壓 - 電源:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 125°C 封裝/外殼:10-XFDFN 裸露焊盤 標(biāo)準(zhǔn)包裝:1 |
| MICRF113 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:QwikRadio㈢ ASK Transmitter |
| MICRF113_11 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:300MHz to 450MHz +10dBm ASK Transmitter in SOT23 |
| MICRF113-315 EV | 制造商:Micrel Inc 功能描述:evaluation board for MICRF113 |
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