Two-channel logarithmic detector measures and controls RF signals over a wide frequency range

24 January 2007 Telecoms, Datacoms, Wireless, IoT

Optimised for wireless infrastructure, a new detector/controller IC eases RF design challenges by simultaneously measuring and monitoring two input signals with one package.

Analog Devices' ADL5519 is a dual detector/controller that precisely measures and controls the gain across the transmitter and receiver signal path within wireless infrastructure equipment. The ADL5519 integrates two matched detectors on a single chip, which offers considerable savings in board area and component cost as compared to conventional or discrete solutions.

The ADL5519 covers a wide frequency range of 1 MHz to 10 GHz, making the part suitable for all cellular and broadband wireless standards as well as proprietary systems that operate in extended frequency bands such as UNII 5,8 GHz.

The chip integrates two AD8317 log detectors to provide scaled, independent, logarithmic outputs of both RF input channels. It offers fast response time of 8/10 ns (fall/rise) and superior temperature stability of ±0,5 dB over a 50 dB dynamic range. It also provides a difference output that effectively measures the power gain or loss between the two inputs.

With the difference output, the ADL5519 can accurately control the gain across a transmitter or receiver signal chain as each of the two individual log detectors can be set to measure input signals at different frequencies. Within high power amplifiers, it can be used to monitor input and output power, or to measure forward and reverse output power, that is, the return loss voltage standing wave ratio (VSWR) of the load.

The 24-lead ADL5519 operates over 3-5 V, typically consuming 56 mA, and only 400 μA when disabled.

Further reading:

Power amps for portable radio comms systems
iCorp Technologies Telecoms, Datacoms, Wireless, IoT
CML Micro expands its SµRF product portfolio with a pair of high efficiency single- and two-stage power amplifiers that offer outstanding performance for a wide range of dual-cell lithium battery-powered wireless devices.

Read more...

---

RF agile transceiver
Altron Arrow Telecoms, Datacoms, Wireless, IoT
The AD9361 is a high performance, highly integrated RF Agile Transceiver designed for use in 3G and 4G base station applications.

Read more...

---

Choosing a GNSS receiver
RF Design Telecoms, Datacoms, Wireless, IoT
Applications requiring sub-ten-meter positioning accuracy today can choose between single-band or dual-band technology. While this decision might seem as simple as flipping a coin, it is far from that.

Read more...

---

Tri-Teq’s latest range of filters
RFiber Solutions Telecoms, Datacoms, Wireless, IoT
Tri-Teq recently presented its latest filter products, which included passive and co-site mitigation filters (lumped element and suspended substrate technologies) and tunable filters (bandpass and harmonic switched filters).

Read more...

---

Why GNSS positioning precision is enabling the next wave of IoT applications
iCorp Technologies Editor's Choice Telecoms, Datacoms, Wireless, IoT
While high-performance GNSS implementations are achievable with few limitations, most real-world applications must balance power consumption, form factor and accuracy requirements.

Read more...

---

The evolution of 4D imaging radar
Altron Arrow Telecoms, Datacoms, Wireless, IoT
4D imaging radar is redefining automotive sensing with unmatched precision, scalability and resilience and, as global adoption accelerates, this technology is poised to become a cornerstone of autonomous mobility.

Read more...

---

Links Field Networks: The perfect fit for telematics in Africa
Links Field Networks Telecoms, Datacoms, Wireless, IoT
Operating at the intersection of global SIM innovation and local market intelligence, Links Field Networks has emerged as a premier provider of telematics-oriented connectivity across Africa and beyond.

Read more...

---

RF direct conversion receiver
iCorp Technologies Telecoms, Datacoms, Wireless, IoT
The CMX994 series from CML Micro is a family of direct conversion receiver ICs with the ability to dynamically select power against performance modes.

Read more...

---

Bridging the future with RAKWireless WisNode devices
Otto Wireless Solutions Telecoms, Datacoms, Wireless, IoT
The WisNode Bridge series by RAKWireless is designed to convert traditional wired industrial protocols like RS485 and Modbus into LoRa-compatible signals.

Read more...

---

Mission-critical RF transceiver
Vepac Electronics Telecoms, Datacoms, Wireless, IoT
The Iris SQN9506 from Sequans Communications is a wide-band RF transceiver that operates from 220 MHz to 7,125 GHz.

Read more...

---