Analog Devices

The LTC5556 dual programmable gain downconverting mixer is ideal for diversity and MIMO receivers that require precise gain setting. Each channel incorporates an active mixer and a digital IF VGA with 15.5dB gain control range. The IF gain of each channel is programmed in 0.5dB steps through the SPI.Enable pins for each channel allow fast turn-on and shutdown. A reduced power mode is also available.The device has the same functionality as the LTC5566, but the mixers are optimized for a higher 3GHz to 7GHz RF frequency range and the IF is optimized for use up to 900MHz. The mixers may be used down to 1.5GHz, or up to 8GHz with degraded performance.Dual Programmable Gain Downconverting MixersPART NUMBEROPTIMUM RF RANGEIF RANGELTC55563GHz to 7GHz1MHz to 900MHzLTC5566300MHz to 4.5GHz1MHz to 500MHzApplications4G and 5G MIMO Receivers5.1GHz to 5.9GHz LTE-UDistributed Antenna Systems (DAS)Network Test/Monitoring EquipmentFixed Satellite Services

The LTC5562 is a versatile low power mixer optimized for applications requiring wide input bandwidth, low distortion and low LO leakage. This mixer can be used for either upconverting or downconverting applications, and provides a nominal conversion gain of 1dB. The differential input is optimized for use with a 1:1 transmission-line balun, the input is 50Ω broadband matched from 30MHz to 7GHz.The LO can be differential or single-ended and requires only –1dBm of LO power to achieve excellent distortion and noise performance. The impedance match at the LO input is maintained during shutdown. This mixer offers low LO leakage, greatly reducing the need for output filtering to meet LO suppression requirements.The LTC5562 uses a 3.3V supply for low power consumption and the enable control allows the part to be shut down for further power savings. The total mixer current is adjustable, by simply adding a resistor in series with the LGND pin, for applications requiring even lower power.ApplicationsPortable RadiosPortable Test InstrumentsWireless InfrastructureFixed Wireless Access EquipmentVHF & UHF MixerWireless Repeaters

The LTC5564 is a precision, RF power detector for applications in the 600MHz to 15GHz frequency range. The LTC5564 operates with input power levels from –24dBm to 16dBm.A temperature compensated Schottky diode peak detector, gain-selectable operational amplifier, and fast comparator are combined in a small 16-lead 3mm × 3mm QFN package.The RF input signal is peak detected and then sensed by both a comparator and amplifier. The comparator provides a 9ns response time to input levels exceeding VREFalong with a latch enable/disable function. The gain selectable operational amplifier provides a 350V/μs slew rate and 75MHz of demodulation bandwidth to the analog output.VOUTADJand VREFpins allow for the adjustment of VOUToffset and VCOMPswitch point voltages, respectively.ApplicationsRF Signal Presence Detectors for: 802.11a, 802.11b, 802.11g, 802.15, Optical Data Links, Wireless Data Modems, Wireless and Cable Infrastructure5.8GHz ISM Band RadiosMMDS Microwave LinksPA Power Supply Envelope Tracking ControlFast AlarmRF Power MonitorEnvelope DetectorUltra-Wideband RadioRadar Detector

The LTC5566 dual programmable gain downconverting mixer is ideal for diversity and MIMO receivers that require precise gain setting. Each channel incorporates an active mixer and a digital IF VGA with 15.5dB gain control range. The IF gain of each channel is programmed in 0.5dB steps through the SPI.Programmable RF input tuning via the SPI or parallel control lines makes the device attractive for wideband radio applications. Furthermore, a reduced power mode is available, programmed through the SPI.Integrated RF transformers provide single-ended 50Ω inputs. The differential LO input is designed for single-ended or differential drive. The differential IF output simplifies the interface to differential IF filters and amplifiers. The mixers are optimized for use up to 5GHz but may be used up to 6GHz with degraded performance.Applications4G and 5G MIMO ReceiversDiversity ReceiversDistributed Antenna Systems (DAS)Network Test/Monitoring EquipmentSoftware-Defined Radios

The LTC5569 dual active downconverting mixer is optimized for diversity and MIMO receiver applications that require low power and small size. Each mixer includes an independent LO buffer amplifier, active mixer core, and bias circuit with enable pin. The symmetry of the IC assures that a phase and amplitude coherent LO is applied to each mixer.The RF inputs are 50Ω matched from 1.4GHz to 3.3GHz, and easily matched for higher or lower RF frequencies with simple external matching. The LO input is 50Ω matched from 1GHz to 3.5GHz, even when one or both mixers are disabled. The LO input is easily matched for higher or lower frequencies, as low as 350MHz, with simple external matching. The low capacitance differential IF outputs are usable up to 1.6GHz.ApplicationsWireless Infrastructure Diversity ReceiversMIMO Infrastructure ReceiversRemote Radio Units

The LTC5577 active mixer is optimized for RF downconverting applications that require high input signal handling capability and wide bandwidth. The wideband IF output uses external resistors to set the output impedance, allowing the flexibility to match directly into differential IF loads, such as filters and amplifiers. The part is characterized and specified with a 100Ω differential output impedance, although it can be used with output impedances ranging from 50Ω to 400Ω, with higher gain and reduced IIP3 and P1dB at the higher impedance levels. The IF output is usable up to 1.5GHz.In receiver applications, the high input P1dB and IIP3 allow the use of higher gain low noise amplifiers, resulting in higher receiver sensitivity. Integrated transformers on the RF and LO inputs provide single-ended 50Ω interfaces, while minimizing the solution size.ApplicationsWireless Infrastructure ReceiversDPD Observation ReceiversCATV Infrastructure

The LTC5582 is a 40MHz to 10GHz RMS responding power detector. It is capable of accurate power measurement of an AC signal with wide dynamic range, from –60dBm to 2dBm depending on frequency. The power of the AC signal in an equivalent decibel-scaled value is precisely converted into DC voltage on a linear scale, independent of the crest factor of the input signal waveforms. The LTC5582 is suitable for precision RF power measurement and level control for a wide variety of RF standards, including LTE, WiMAX, W-CDMA, CDMA2000, TD-SCDMA, and EDGE. The DC output is buffered with a low output impedance amplifier capable of driving a high capacitance load. Consult factory for more information. The part is packaged in a 10-lead 3mm × 3mm DFN. It is pin-to-pin compatible with the LT5570.ApplicationsRMS Power MeasurementPA Power ControlReceive and Transmit Gain ControlLTE, WiMAX, W-CDMA, CDMA2K, TD-SCDMA, EDGE BasestationsPoint-to-Point Microwave LinksRF Instrumentation

The LTC5583 is a dual-channel RMS power detector, capable of measuring two AC signals with wide dynamic range, from –59dBm to 4dBm, depending on frequency. Each AC signal’s power in decibel-scaled value is precisely converted to a DC voltage on a linear scale, independent of the crest factor of the input signal waveforms. The LTC5583 is suitable for precision power measurement and level control for a variety of RF standards, including LTE, EDGE, W-CDMA, CDMA2000, TD-SCDMA, and WiMAX.Good channel-to-channel isolation is necessary for operating the dual channels simultaneously. For applications where the two input signals are at the same frequency (e.g. measuring VSWR), the LTC5583 provides 40dB isolation at 2.14GHz even with single-ended inputs. No baluns are needed. When the two input signals are at different frequencies, the isolation can be as high as 50dB. The isolation can be improved to >55dB with differential inputs.The power difference of the two input signals is provided at a difference output pin. Each channel also has a fast envelope detector, which tracks the RF input signal’s envelope and outputs a voltage directly proportional to the signal’s instantaneous power. The envelope detectors can be disabled to reduce power consumption.ApplicationsVSWR MonitorMIMO Transmit Power ControlBasestation PA ControlTransmit and Receive Gain ControlRF Instrumentation

The LTC5584 is a direct conversion quadrature demodulator optimized for high linearity receiver applications in the 30MHz to 1.4GHz frequency range. It is also usable in the 10MHz to 30MHz and 1.4GHz to 2GHz ranges with reduced performance. It is suitable for communications receivers where an RF signal is directly converted into I and Q baseband signals with bandwidth of 530MHz or higher. The LTC5584 incorporates balanced I and Q mixers, LO buffer amplifiers and a precision, high frequency quadrature phase shifter. In addition, the LTC5584 provides four analog control voltage interface pins for IIP2 and DC offset correction, greatly simplifying system calibration.The high linearity of the LTC5584 provides excellent spurfree dynamic range for the receiver. This direct conversion demodulator can eliminate the need for intermediate frequency (IF) signal processing, as well as the corresponding requirements for image filtering and IF filtering. These I/Q outputs can interface directly to channel-select filters (LPFs) or to baseband amplifiers.ApplicationsLTE/W-CDMA/TD-SCDMA Base Station ReceiversWideband DPD ReceiversPoint-To-Point Broadband RadiosHigh Linearity Direct Conversion I/Q ReceiversImage Rejection Receivers

The LTC5585 is a direct conversion quadrature demodulator optimized for high linearity receiver applications in the 400MHz to 4GHz frequency range. It is suitable for communications receivers where an RF signal is directly converted into I and Q baseband signals with bandwidth of 530MHz or higher. The LTC5585 incorporates balanced I and Q mixers, LO buffer amplifiers and a precision, high frequency quadrature phase shifter. The integrated on-chip broadband transformer provides a single-ended interface at the RF input with simple off-chip L-C matching. In addition, the LTC5585 provides four analog control voltage interface pins for IIP2 and DC offset correction, greatly simplifying system calibration.The high linearity of the LTC5585 provides excellent spurfree dynamic range for the receiver. This direct conversion demodulator can eliminate the need for intermediate frequency (IF) signal processing, as well as the corresponding requirements for image filtering and IF filtering. These I/Q outputs can interface directly to channel-select filters (LPFs) or to baseband amplifiers.ApplicationsLTE/W-CDMA/TD-SCDMA Base Station ReceiversWideband DPD ReceiversPoint-To-Point Broadband RadiosHigh Linearity Direct Conversion I/Q ReceiversImage Rejection Receivers