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參數(shù)資料
| 型號： | ML2724 |
| 英文描述： | 2.4GHz Low-IF 1.5Mbps FSK Transceiver Final Datasheet |
| 中文描述： | 2.4GHz的低IF 1.5Mbps的FSK收發(fā)器最終數(shù)據(jù)表 |
| 文件頁數(shù)： | 13/26頁 |
| 文件大?。?/td> | 864K |
| 代理商： | ML2724 |
ML2724
The RF mixer down-converts the 2.4GHz RF input signal to the first intermediate frequency (IF), where it is filtered to
remove adjacent channel signals. An active image reject mixer converts this signal down to a Low IF frequency, where
the data is limited, filtered, and demodulated. This architecture provides all the benefits of direct conversion to
baseband while maintaining the stability and robustness of a traditional super-heterodyne.
A single synthesizer is used for both the receiver and the FSK transmitter. The phase locked loop (PLL) is completely
integrated, including the voltage controlled oscillator (VCO), tuning circuits, and VCO resonator.
In
RECEIVE MODE
, the ML2724 is a dual conversion Low IF receiver.
No external SAW filters are required
.
The
integrated image reject mixer gives sufficient rejection in this channel. All channel filtering and demodulation is
performed using active filters, which are automatically aligned. A matched bit rate filter and a data slicer follow the
demodulator. The sliced data is provided at the DOUT pin, and the analog data is available at AOUT.
In
TRANSMIT MODE
, the ML2724 generates a 2.4GHz output using the transmit mixer. An auto-aligned transmit data
filter and modulation compensation circuit results in an adjustment-free transmitter. The VCO is modulated by the
transmit data, which is put through a sigma-delta fractional-N PLL ensuring modulation accuracy. This modulation
occurs while the phase locked loop is closed, thus allowing practically infinite transmit or receive times with excellent
frequency accuracy and stability. A 3dBm FSK-modulated differential signal is output at the TXO/TXOB pins at the
2.4GHz carrier frequency.
The integrated PLL frequency synthesizer includes a fully integrated VCO, prescaler, phase detector and charge pump.
The reference frequency is generated from the incoming signal at the FREF pin, which can be either 6.144MHz or
12.288MHz. The loop filter is external to allow customers to optimize their loop bandwidth to their system’s lock time
and in-band phase noise requirements. This frequency-agile synthesizer allows the ML2724 to be used in frequency
hopped spread spectrum (FHSS) applications with nominal channel spacing of 2.048MHz. Carrier frequency is
programmed via the configuration registers and 3-wire serial interface. The VCO tank circuit (inductor and varactor) is
fully integrated.
QPO
RVVCO
220nF
150
33nF
VTUNE
Example 13KHz Loop Filter
MODES OF OPERATION
There are three key modes of operation:
STANDBY:
All circuits powered down, except the control interface (Static CMOS)
RECEIVE:
Receiver circuits active
TRANSMIT:
Modulated RF output from IC
The two operational modes are RECEIVE and TRANSMIT, controlled by RXON. XCEN is the chip enable/disable
control pin, which sets the part in operational or STANDBY modes. The relationship between the parallel control lines
and the mode of operation of the IC is given in
Table 1
.
XCEN
RXON
MODE
FUNCTION
0
X
STANDBY
Control interfaces active, all other circuits powered down
1
1
RECEIVE
Receiver time slot
1
0
TRANSMIT
Transmit time slot
Table 1: Modes of Operation
DS2724-F-01
FINAL DATASHEET
APRIL 2003
13
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ML2724DH | 2.4GHz Low-IF 1.5Mbps FSK Transceiver Final Datasheet |
| ML4000H | Logic IC |
| ML4001C | Logic IC |
| ML4001D | Logic IC |
| ML4002H | Logic IC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ML2724_05 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:2.4GHz Low-IF 1.5Mbps FSK Transceiver |
| ML2724DH | 制造商:Micro Linear Corp (RFMD Inc. ) 功能描述:FSK RF Transceiver,Low IF 1.5Mbps,2400 to 2485Mhz,TQFP-32, Tray |
| ML2724DH-T | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:2.4GHz Low-IF 1.5Mbps FSK Transceiver |
| ML2724SK-02 | 制造商:Sirenza Microdevices 功能描述:2.4GHZ STARTER KIT 制造商:Micro Linear Corp (RFMD Inc. ) 功能描述:ML2724 Starter Kit - FSK RF Transceiver,Low IF 1.5Mbps,2400 to 2485Mhz,TQFP-32, Bulk |
| ML2726 | 制造商:SIRENZA 制造商全稱:SIRENZA 功能描述:2.4GHz Low-IF 2.0Mbps FSK Transceiver |
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