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User GuidesDC2847A User Guide
Features and Benefits
- Frequency Range: 9 KHz to 7 GHz
- Insertion Loss:
- 0.9 dB @1GHz
- 1.9 dB @6 GHz
- Input and Output Return Loss/VSWR:
- <1 GHz: >15 dB (<1:1.4)
- 1 to 3 GHz: 15 dB (1:1.4)
- 3 to 6 GHz: 13 dB (1:1.6)
- OIP3: +70.5 dBm
- 23 dB @ 1 GHz
- 14 dB @ 3 GHz
- 6 dB @ 6 GHz
- Max Input Power: +30 dBm
- Forward Power Measurement range: 50 dB at 1 GHz
- Linear-in-dB Outputs for RMS and Return Loss Measurement
The ADL5920 is an ultra-wide band bi-directional bridge detector that can simultaneously measure forward and reverse RMS power levels in a signal path along with return loss.
The forward and reverse power in the bridge is measured using two high range RMS detectors. The ratio of the forward and reverse power levels is also measured and provided as a differential output voltage with an adjustable common mode level.
The bridge and detector circuitry is internally DC coupled to allow for frequency measurements down to 9 KHz. By applying an optional -2.5V negative supply, ground referenced dc-coupled signals can be applied.
The miximum input signal on each of the RF ports (RFIP and RFOP) is +30 dBm with handling capability for open and shorted loads.
The ADL5920 requires a 5V supply and draws 150 mA. It can be powered down via a PWDN pin.
The ADL5920 is supplied in a 32-lead, 5 mm x 5 mm LFCSP, for the operating temperature range of –40°C to +85°C.
- Broadband In-Line Power and Return Loss Measurement in Wireless Transmitters
- Signal Generators
- Network Analyzers
- Wireless Communications Testers
Product Lifecycle Pre-Release
This product is new and engineering validation may still be underway. Quantities may be limited and design specifications may change while we ready the product for release to production.
Evaluation Kits (3)
ADL5920-EVALZ is a fully populated, 4-layer, FR4-based evaluation board. For normal operation, it requires a 5 V/200 mA power supply. The 5 V power supply should be connected to the VPOS and GND test loops. The RF input and load should be applied to the RFIN and RFOUT 2.92 mm connectors respectively (since the ADL5920 is fully bi-directional, the input signal can also be applied to RFOUT with the load on RFIN.) The output voltages are available on the VRMSR, VRMSF, VDIFF+ and VDIFF- SMA connectors or on the adjacent test loops.
ADL5920-EVALSDPZ is a fully populated, 4-layer, FR4-based evaluation board. In addition to the ADL5920 ic, this board includes a multi-channel 12-Bit ADC (AD7091R-5) and an SDP connector. An SDP-S controller board (sold separately) is required to connect the ADL5920-EVALSDPZ to the USB port of a pc. No external power supply is required as both boards are USB-powered. The RF input and load should be applied to the 2.92 mm connectors labeled IN and OUT respectively (since the ADL5920 is fully bi-directional, the input signal can also be applied to OUT with the load on IN). A software GUI is available which samples the ADC output displays measured power and return loss.
The DC2847A kit is a dual RMS power detector with integrated directional bridge featuring the ADL5920 IC. The ADL5920 Arduino shield enables the evaluation of the device with the Linduino board. Together with the GUI, forward (as well as reverse) power can be measured and monitored on PC. Return Loss is calculated and displayed.
The ADL5920 with integrated bridge simultaneously measure forward power and reverse RMS power up to 7GHz and provides return loss results. The detector has 50dB of dynamic range at 1GHz. The demo board requires external power supply that connects to the Linduino board.
The DC2847A is compatible with EVAL-ADICUP3029 and Linduino. For both platforms, PC software GUI applications (ADICUP3029, Linduino) are available using which, the user can make RF power measurements and calibrate the device to decrease measurement error. Device drivers for ADICUP3029 and for Linduino are also available, which the user may use to develop their own code for RF measurement, device calibration, and more.
Tools & Simulations
Product Selection Guide (1)
Analog Dialogue (1)
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.