- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385769 > RF2945 (RF MICRO DEVICES INC) 433/868/915MHZ FSK/ASK/OOK TRANSCEIVER PDF資料下載
參數(shù)資料
| 型號： | RF2945 |
| 廠商： | RF MICRO DEVICES INC |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | 433/868/915MHZ FSK/ASK/OOK TRANSCEIVER |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQFP32 |
| 封裝： | 5 X 5 MM, PLASTIC, LQFP-32 |
| 文件頁數(shù)： | 7/24頁 |
| 文件大?。?/td> | 742K |
| 代理商： | RF2945 |
11-221
RF2945
Rev A10 000919
11
T
* LVL ADJ pin must be low to disable transmitter.
Pin
28
Function
VCC1
Description
This pin is used to supply DC bias to the LNA, Mixer, 1st IF Amp and
Bandgap reference. A RF bypass capacitor should be connected
directly to this pin and returned to ground. A 22pF capacitor is recom-
mended for 915MHz applications. A 68pF capacitor is recommended
for 433MHz applications.
Demodulated data output from the demodulator. Output levels on this
are TTL/CMOS compatible. The magnitude of the load impedance is
intended to be 1M
or greater.
Interface Schematic
29
DATA OUT
30
VCC3
This pin is used to supply DC bias and collector current to the transmit-
ter PA. It also supplies voltage to the 2
nd
IF Amplifier, Demod and data
slicer. A RF bypass capacitor should be connected directly to this pin
and returned to ground. A 22pF capacitor is recommended for 915MHz
applications. A 68pF capacitor is recommended for 433MHz applica-
tions.
This pin is used to vary the transmitter output power. An output level
adjustment range greater than 12dB is provided through analog volt-
age control of this pin. DC current of the transmitter power amp ia also
reduced with output power.
NOTE: This pin MUST be low when the transmitter is disabled.
31
LVL ADJ
32
RX ENABL
Enable pin for the receiver circuits. RX ENABL>2.0V powers up all
receiver functions. RX ENABL<1.0V turns off all receiver functions
except the PLL functions and the RF mixer.
Operation
Mode
Sleep Mode
Transmit Mode
Receive Mode
TX ENABL
RX ENABL
Function
Low
High
Low
High
Low
Low
High
High
Entire chip is powered down. Total current consumption is <1
μ
A. *
Transmitter, VCO are on.
Receiver, VCO are on. *
VCO is on. This mode allows time for a synthesizer loop to lock without
spending current on the transmitter or receiver.
PLL Lock
DATA OUT
400
4 k
LVL ADJ
40 k
50 k
RX ENABL
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| RF2958 | 2.4GHz SPREAD-SPECTRUM TRANSCEIVER |
| RF2958PCBA | 2.4GHz SPREAD-SPECTRUM TRANSCEIVER |
| RF2958TR13 | 2.4GHz SPREAD-SPECTRUM TRANSCEIVER |
| RF2968 | BLUETOOTHTM TRANSCEIVER |
| RF3160 | DUAL-BAND GSM/DCS POWER AMP MODULE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| RF2945-000 | 制造商:TE Connectivity 功能描述:SESD0402X1BN-0010-098 - Tape and Reel |
| RF2946-000 | 制造商:TE Connectivity 功能描述:SESD0402Q2UG-0020-090 - Tape and Reel |
| RF2948B | 制造商:RFMD 制造商全稱:RF Micro Devices 功能描述:2.4GHz SPREAD-SPECTRUM TRANSCEIVER |
| RF2948BPCBA | 制造商:RFMD 制造商全稱:RF Micro Devices 功能描述:2.4GHz SPREAD-SPECTRUM TRANSCEIVER |
| RF2948BTR13 | 制造商:RFMD 制造商全稱:RF Micro Devices 功能描述:2.4GHz SPREAD-SPECTRUM TRANSCEIVER |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。