Overview
The ADL5920ACPZ, produced by Analog Devices Inc., is an ultrawideband, bidirectional detector designed to measure forward and reverse rms power levels in a signal path, along with the return loss. This device operates over a wide frequency range of 9 kHz to 7 GHz, making it versatile for various RF and microwave applications. The ADL5920 features a bidirectional bridge that allows for the measurement of forward and reverse power using two 50 dB linear in dB rms detectors. Additionally, it provides a differential output that is proportional to the return loss (reflection coefficient) in dB, closely related to the voltage standing wave ratio (VSWR).
Key Specifications
| Parameter | Specification |
|---|---|
| Frequency Range | 9 kHz to 7 GHz |
| Input Range | 49 dB ±1.0 dB, −19 dBm minimum input level |
| Insertion Loss | Typically less than 1 dB |
| Maximum Input Signal | 30 dBm for open and shorted terminations, 33 dBm for a matched termination |
| Supply Voltage | +5 V and −2.5 V (relative to the dc voltage at RFIN and RFOUT) |
| Current Consumption | 160 mA from a 5 V supply |
| Operating Temperature | −40°C to +85°C |
| Package Type | 32-lead, 5 mm × 5 mm LFCSP |
Key Features
- Wideband operation from 9 kHz to 7 GHz
- Simultaneous measurement of forward and reverse rms power levels
- Measurement of return loss (reflection coefficient) in dB
- Linear in dB rms (crest factor insensitive) outputs
- Externally adjustable common-mode level through the VOCM pin
- Low power, power-down mode controlled through the PWDN/TADJS pin
- DC-coupled primary transmission line allowing small amounts of dc bias current
Applications
- RF and microwave systems requiring precise power and return loss measurements
- Wireless communication systems, including base stations and handsets
- Radar and electronic warfare systems
- Test and measurement equipment
- Medical and industrial RF applications
Q & A
- What is the frequency range of the ADL5920?
The ADL5920 operates over a frequency range of 9 kHz to 7 GHz.
- What types of power measurements does the ADL5920 support?
The ADL5920 measures forward and reverse rms power levels in a signal path, along with the return loss.
- What is the input range of the ADL5920?
The input range is 49 dB ±1.0 dB with a minimum input level of −19 dBm.
- What is the maximum input signal for the ADL5920?
The maximum input signal is 30 dBm for open and shorted terminations and 33 dBm for a matched termination.
- How is the common-mode level adjusted in the ADL5920?
The common-mode level is externally adjustable through the VOCM pin.
- What is the power consumption of the ADL5920?
The device draws 160 mA from a 5 V supply and has a low power, power-down mode.
- What is the operating temperature range of the ADL5920?
The operating temperature range is −40°C to +85°C.
- In what package type is the ADL5920 available?
The ADL5920 is available in a 32-lead, 5 mm × 5 mm LFCSP package.
- Does the ADL5920 support dc-coupled operations?
Yes, the primary transmission line of the bidirectional bridge is dc-coupled, allowing small amounts of dc bias current through the bridge.
- What are some typical applications of the ADL5920?
Typical applications include RF and microwave systems, wireless communication systems, radar and electronic warfare systems, test and measurement equipment, and medical and industrial RF applications.
