Linear Technology’s LTC5551 is an ultra-high dynamic range RF down-converting mixer for applications that demand high performance. It offers very high linearity of +36 dBm IIP3 (input third-order intercept) and low 9,7 dB noise figure comparable to the highest IIP3 passive mixers available.
Unlike passive mixers which typically have 7 dB to 9 dB of conversion loss, the LTC5551 boasts 2,4 dB of conversion gain, substantially improving receiver dynamic range. The device also has broad RF frequency range capability, operating from 300 MHz to 3,5 GHz.
Additionally, passive mixers require high LO (local oscillator) drive to reach their claimed IIP3. The LTC5551 has an integrated LO buffer requiring only 0 dBm drive level, hence external circuitry and costs are minimised. And with the elimination of a high-power LO signal in the user’s receiver, it substantially reduces a potential source of undesirable radiation, thus simplifying filtering and RF shielding requirements.
The IC ensures robust radio performance with its high 1 dB compression point of +18 dBm. Both the RF and LO inputs have integrated balun transformers. The mixer is powered from a single 3,3 V supply with current consumption of 204 mA. If needed, it also has a low-power mode in which current consumption drops by 30% to 142 mA, trading off the IIP3 slightly to +29,3 dBm.
The performance of this mixer is suited for a wide range of mission-critical, high-performance applications that are exposed to strong interference sources, such as multi-carrier GSM, 4G LTE and LTE-Advanced multimode base stations, point-to-point backhauls, military communications, wireless repeaters, public safety radios, VHF/UHF/white-space broadcast receivers, radar and avionics.
The mixer can be conveniently shut down with an enable control pin. When disabled, it draws a maximum of 100 μA standby current. The device turns on and off in 500 ns, suitable for burst-mode receivers. It is specified for operation from -40°C to 105°C case temperature and is supplied in a 16-lead, 4 x 4 mm QFN package.
High reliability memories Altron Arrow
DSP, Micros & Memory
Infineon’s mil-temp memories offer a wide selection of volatile and non-volatile memories for applications that meet QML-Q certifications and offer support for mil-aero applications.
Read more...Reference board for cardio monitoring Altron Arrow
Telecoms, Datacoms, Wireless, IoT
The STDES-ESP01 reference board from STMicroelectronics demonstrates the capability of the ST1VAFE6AX and ST1VAFE3BX biosensors to detect ECG and SCG signals.
Read more...ST MCUs extend ultra-low power innovation Altron Arrow
DSP, Micros & Memory
STMicroelectronics has introduced new STM32U3 microcontrollers with cutting-edge power-saving innovations that ease deployment of smart connected tech, especially in remote locations.
Read more...Multicell battery monitoring Altron Arrow
Power Electronics / Power Management
The LTC6811 from Analog Devices is a multicell battery stack monitor that measures up to 12 series connected battery cells with a total measurement error of less than 1,2 mV.
Read more...A new era in modular I/O solutions Rugged Interconnect Technologies
Analogue, Mixed Signal, LSI
Aerospace and defence system designers are demanding scalable and high-performance I/O solutions and while traditional mezzanine standards have proven reliable, they often fall short of meeting modern bandwidth, size, and flexibility requirements.
Read more...High voltage instrument op-amp iCorp Technologies
Analogue, Mixed Signal, LSI
The SGM621B is a high accuracy, high voltage instrumentation amplifier, which is designed to set any gain from 1 to 10 000 with one external resistor.
Read more...Innovative satellite navigation receiver Altron Arrow
Telecoms, Datacoms, Wireless, IoT
STMicroelectronics has released an innovative satellite navigation receiver to democratise precise positioning for automotive and industrial applications.
Read more...LED driver for industrial power supply indication Altron Arrow
Editor's Choice Circuit & System Protection
A simple and small solution for driving an LED to provide visual feedback in the presence/absence of a system’s power using a chip not originally designed for this purpose.
Read more...High-voltage step-down DC-DC converter Altron Arrow
Power Electronics / Power Management
The MAX17793 is a high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operating over an input voltage range of 3 to 80 V.
printer friendly version