Overview
The ADRF6821ACPZ-RL7, produced by Analog Devices Inc., is a highly integrated, dual radio frequency (RF) input, zero intermediate frequency (IF)/low IF RFIC receiver. This component is designed for communication digital predistortion (DPD) systems and features a quadrature demodulator, digital step attenuator (DSA), IF linear amplifiers, and an integrated fractional-N phase-locked loop (PLL) with a low phase noise, multicore, voltage-controlled oscillator (VCO). The device is fabricated using an advanced silicon germanium (SiGe) bipolar complementary metal oxide semiconductor (BiCMOS) process and is available in a 56-lead, RoHS compliant, 8 mm × 8 mm LFCSP package with an exposed pad. Performance is specified over the −40°C to +105°C case temperature range.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| RF Frequency Range | 450 | 2800 | MHz | |
| Input Impedance | 50 | 50 | Ω | |
| Demodulation Bandwidth | 500 | MHz | ||
| Group Delay Ripple (Fixed LO frequency, 75 MHz BW) | 0.1 | ns | ||
| Group Delay Ripple (Fixed LO frequency, 280 MHz BW) | 0.2 | ns | ||
| Output Impedance (IF_IOUT± and IF_QOUT±) | 10 | Ω | ||
| Output DC Offset (No correction) | 40 | mV | ||
| Output DC Offset (Correction applied) | 2 | mV |
Key Features
- Integrated RF balun for single-ended 50 Ω input
- Integrated VCO to cover complete RF input range
- Digital programmable LO phase offset and DC nulling
- Programmable via 4-wire SPI
- High isolation 2:1 RF switch and on-chip wideband RF balun
- Digital step attenuator (DSA) and IF linear amplifiers
- Fractional-N phase-locked loop (PLL) with low phase noise, multicore VCO
- Quadrature demodulator
Applications
- Cellular W-CDMA/GSM/LTE DPD receivers
- Microwave, point-to-point radios
- Communication digital predistortion (DPD) systems
Q & A
- What is the RF frequency range of the ADRF6821ACPZ-RL7?
The RF frequency range is from 450 MHz to 2800 MHz. - What type of process is used to fabricate the ADRF6821ACPZ-RL7?
The device is fabricated using an advanced silicon germanium (SiGe) bipolar complementary metal oxide semiconductor (BiCMOS) process. - What is the package type and size of the ADRF6821ACPZ-RL7?
The device is available in a 56-lead, RoHS compliant, 8 mm × 8 mm LFCSP package with an exposed pad. - What are the key features of the ADRF6821ACPZ-RL7?
Key features include an integrated RF balun, digital programmable LO phase offset, high isolation 2:1 RF switch, and a fractional-N phase-locked loop (PLL) with a low phase noise, multicore VCO. - What are the typical applications of the ADRF6821ACPZ-RL7?
Typical applications include cellular W-CDMA/GSM/LTE DPD receivers and microwave, point-to-point radios. - How is the device programmed?
The device is programmable via a 4-wire SPI interface. - What is the operating temperature range of the ADRF6821ACPZ-RL7?
The performance is specified over the −40°C to +105°C case temperature range. - What is the output impedance of the IF_IOUT± and IF_QOUT± pins?
The output impedance is 10 Ω. - Does the ADRF6821ACPZ-RL7 have built-in DC offset correction?
Yes, the device has built-in DC offset correction, reducing the offset to 2 mV when applied. - What is the demodulation bandwidth of the ADRF6821ACPZ-RL7?
The demodulation bandwidth is up to 500 MHz.
