ADL5387-EVALZ: 50 MHz to 2 GHz Quadrature Demodulator
The ADL5387 is a broadband quadrature I/Q demodulator that covers an RF/IF input frequency range from 50 MHz to 2 GHz. With a NF = 13.2 dB, IP1dB = 12.7 dBm, and IIP3 = 32 dBm @ 450 MHz, the ADL5387 demodulator offers outstanding dynamic range suitable for the demanding infrastructure direct-conversion requirements. The differential RF/IF inputs provide a well-behaved broadband input impedance of 50 Ω and are best driven from a 1:1 balun for optimum performance.
Ultrabroadband operation is achieved with a divide-by-2 method for local oscillator (LO) quadrature generation. Over a wide range of LO levels, excellent demodulation accuracy is achieved with amplitude and phase balances ~0.05 dB and ~0.4°, respectively. The demodulated in-phase (I) and quadrature (Q) differential outputs are fully buffered and provide a voltage conversion gain of >4 dB. The buffered baseband outputs are capable of driving a 2 V p-p differential signal into 200 Ω.
The fully balanced design minimizes effects from second-order distortion. The leakage from the LO port to the RF port is <-70 dBc. Differential dc-offsets at the I and Q outputs are <10 mV. Both of these factors contribute to the excellent IIP2 specifications > 60 dBm.
The ADL5387 operates off a single 4.75 V to 5.25 V supply. The supply current is adjustable with an external resistor from the BIAS pin to ground.
The ADL5387 is fabricated using the Analog Devices, Inc. advanced silicon-germanium bipolar process and is available in a 24-lead exposed paddle LFCSP.
产品应用领域 Applications
- QAM/QPSK RF/IF demodulators
- W-CDMA/CDMA/CDMA2000/GSM
- Microwave point-to-(multi)point radios
- Broadband wireless and WiMAX
- Broadband CATVs
ADL5387-EVALZ 特点
- Operating RF frequency
50 MHz to 2 GHz - LO input at 2 × fLO
100 MHz to 4 GHz - Input IP3: 31 dBm @ 900 MHz
- Input IP2: 62 dBm @ 900 MHz
- Input P1dB: 13 dBm @ 900 MHz
- Noise figure (NF)
12.0 dB @ 140 MHz
14.7 dB @ 900 MHz - Voltage conversion gain > 4 dB
- Quadrature demodulation accuracy
Phase accuracy ~0.4°
Amplitude balance ~0.05 dB - Demodulation bandwidth ~240 MHz
- Baseband I/Q drive 2 V p-p into 200 Ω
- Single 5 V supply
ADL5387-EVALZ 功能框图
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| ADL5387-EVALZ | 量产 | 评估板 | 24 | 工业 |
| ADL5387ACPZ-R2 | 量产 | 24 ld LFCSP (4x4mm w/2.30mm EP) | 24 | 工业 |
| ADL5387ACPZ-R7 | 量产 | 24 ld LFCSP (4x4mm w/2.30mm EP) | 24 | 工业 |
| ADL5387ACPZ-WP | 量产 | 24 ld LFCSP (4x4mm w/2.30mm EP) | 24 | 工业 |