RF Modulators and Demodulators

Qorvo's RFMD2081 is a low power, wideband, IQ modulator with integrated fractional-N synthesizer and voltage controlled oscillator (VCO). The modulator features an input 3dB bandwidth of 100MHz, and can generate output frequencies of between 45MHz and 2700MHz, making it suitable for a wide range of applications. The fractional-N synthesizer takes advantage of an advanced sigma-delta architecture that delivers ultra-fine step sizes and low spurious products. The synthesizer/VCO, combined with an external loop filter, allows the user to generate local oscillator (LO) signals from 90MHz to 5400MHz. The LO signal is buffered and routed to a high accuracy quadrature divider (/2) that drives the balanced I and Q mixers. The output of the mixers are summed and applied to a differential RF output stage. This device also features a differential input for an external VCO or LO source. Device programming is achieved via a simple 3-wire serial interface. In addition, a unique programming mode allows up to four devices to be controlled from a common serial bus. This eliminates the need for separate chip-select control lines between each device and the host controller. Up to six general purpose outputs are provided, which can be used to access internal signals (the LOCK signal, for example) or to control front end components. The device is optimized for low power operation, consuming typically only 135mA from a 3V supply. Product Categories Products> Frequency Converters & Sources> Modulat…

MODULATOR IQ 45MHZ TO 2.7GHZ 32QFN

The MAX2500B complete transmitter is designed for low-cost cellular applications. The miniature 7mm x 7mm transmitter includes a quadrature modulator, upconverters, drivers, power amplifiers (PAs), a monolithic voltage-controlled oscillator (VCO), and a PLL. This transmitter is tailored to operate in the cellular and US PCS frequency bands. The MAX2500B is compatible with voltage-mode baseband interfaces. The device is based on a quasi-direct I/Q modulation scheme. The device accepts differential I/Q baseband inputs, which are upconverted to IF. The IF signal is then upconverted to the RF frequency. Each signal is then fed into separate on-chip PAs through external RF filters. PA matching is integrated onto the chip to further reduce external component count. This chip features an on-chip VCO and synthesizer to generate LO signals for both the IF and RF sections. This device integrates a novel PA protection feature to avoid PA damage in a high antenna VSWR environment. The MAX2500B is programmed with an SPI™/MICROWIRE™-compatible 3-wire serial bus. This device features multiple modes of operation, including shutdown, idle, high power, and low power, for flexible power management. To further reduce the current consumption, the PA supply voltage can be reduced to as low as 0.5V at lower output powers. The device operates from a single 2.7V to 3.3V regulated supply and is packaged in a small 7mm x 7mm, 48-lead LGA package. Applications cdmaOne™/cdma2000®/EV-DO Dual-Band and Dual-Mode Cellular Phones F-ODFM Terminals Multiband Applications

The MAX2900–MAX2904 complete single-chip 200mW transmitters are designed for use in the 868MHz/915MHz frequency bands. The MAX2900/MAX2901/MAX2902 are compliant with the FCC CFR47 part 15.247 902MHz to 928MHz ISM-band specifications. MAX2903/MAX2904 are compliant with the ETSI EN330-220 specification for the European 868MHz ISM band. These transmitter ICs offer a high level of integration while minimizing the number of external components. This is achieved by full integration of the transmit modulator, power amplifier, RF VCO, 8-channel frequency synthesizer, and baseband PN sequence lowpass filter. By filtering the BPSK modulation, the spurious emissions are reduced, enabling up to eight independent transmit channels in the U.S. ISM band. Inputs are provided for spread-spectrum BPSK, ASK, and OOK. FM can be achieved by directly modulating the VCO. The devices are intended primarily for use with an external differential antenna. Applications Automatic Meter Reading Wireless Building Control Wireless Data Networks Wireless Security Systems/Alarms Wireless Sensors

The MAX7058 UHF transmitter alternatively transmits ASK/OOK data at 315MHz or 390MHz using a single crystal. The MAX7058 has internal tuning capacitors at the output of the power amplifier that can be programmed for matching to the antenna or load. The MAX7058 can transmit at a data rate up to 100kbps NRZ (50kbps Manchester coded). Typical transmitted power into a 50Ω load is +10dBm. The MAX7058 operates from +2.1V to +3.6V and draws under 8.0mA of current. The standby current is less than 1µA at room temperature. A 15MHz crystal is used as the reference for 315MHz and 390MHz operation by selecting synthesizer-divide ratios of 21 and 26, respectively. The MAX7058 is available in a 4mm × 4mm, 24-pin thin QFN package and is specified to operate in the –40°C to +125°C automotive temperature range. Applications Garage Door Openers Home Automation RF Remote Controls Security Systems Wireless Sensors

The MAX250_ series of complete transmitters are designed for low-cost cellular applications. The miniature 7mm x 7mm transmitter includes a quadrature modulator, upconverters, drivers, power amplifiers (PAs), a peak detector, a monolithic voltage-controlled oscillator (VCO), and a PLL. Each transmitter is tailored for specific frequency bands according to the Selector Guide. The MAX2500/MAX2502/MAX2503/MAX2504/MAX2504A/MAX2506/MAX2507 are compatible with voltage-mode baseband interfaces. The devices are based on quasi-direct I/Q modulation. The devices accept differential I/Q baseband inputs, which are upconverted to IF. The IF signal is then upconverted to the RF frequency. Each signal is then fed into separate on-chip PAs through external RF filters. PA matching is integrated onto the chip to further reduce external component count. These chips feature an on-chip VCO and synthesizer to generate LO signals for both the IF and RF sections. The MAX250_ devices are programmed with an SPI™/MICROWIRE™-compatible 3-wire serial bus. These devices feature multiple modes of operation, including shutdown, idle, high power, and low power, for flexible power management. To further reduce the current consumption, the PA supply voltage can be reduced to as low as 0.5V at lower output powers. The devices operate from single 2.7V to 3.3V regulated supplies and are packaged in a small 7mm x 7mm, 48-lead LGA package. Applications cdmaOne™/cdma2000®/EV-DO Single-Band, Dual-Band, and Tri-Mode Cellular Phones F-ODFM Terminals Multiband Applications TD-SCDMA Cellular Phones

The MAX7060 frequency and power-programmable ASK/FSK transmitter operates at 280MHz to 450MHz frequencies. This device incorporates a fully integrated fractional-N synthesizer, which allows the user to set the RF operating frequency to a large fraction of the 280MHz to 450MHz frequency range with a single crystal. For example, the MAX7060 can be tuned from 285MHz to 420MHz with a 15MHz crystal. The RF output power is user-controlled between +14dBm and -14dBm, with a 5V supply or with battery voltages as low as 3.2V. At the minimum specified battery voltage of 2.1V, the RF output power-control range is between +10dBm and -14dBm. To maintain a good output power match across a broad range of frequencies, the MAX7060 also contains a programmable matching capacitor connected in parallel with the power amplifier (PA) output. ASK modulation is accomplished by switching the PA on and off, so excellent modulation (on/off) ratios are achieved. ASK amplitude shaping is available to reduce the width of the transmission spectrum. FSK modulation is accomplished by changing the coefficients of the high-resolution fractional-N synthesizer, so FSK deviation is extremely accurate. Data rates up to 50kbps Manchester coded for ASK and 70kbps Manchester coded for FSK can be maintained while still satisfying regulatory emission-bandwidth standards. The full set of configuration functions are handled by an on-chip serial peripheral interface (SPI). There is also a manual mode where a limited number of settings can be made directly through selected pins. The startup time is very short, and data can be transmitted 250µs after the enable command. The MAX7060 operates from a 2.1V to 3.6V supply, or internal regulators can be used for supply voltages between 4.5V and 5.5V. The standby current in the 3V mode is 400nA at room temperature, and can be reduced to 5nA using the low-power shutdown (LSHDN) pin. The MAX7060 is available in a 24-pin (4mm x 4mm) thin QFN package and is specified for the automotive temperature range from -40°C to +125°C. Applications Garage-Door Openers Home and Industrial Automation Remote Controls Security Systems Sensor Networks

The MAX2360 dual-band, triple-mode complete transmitter for cellular phones represents the most integrated and architecturally advanced solution to date for this application. The device takes a differential I/Q baseband input and mixes it up to IF through a quadrature modulator and IF variable-gain amplifier (VGA). The signal is then routed to an external bandpass filter and upconverted to RF through an SSB mixer and RF VGA. The signal is further amplified with an on-board PA driver. Dual IF synthesizers, dual RF synthesizers, a local oscillator (LO) buffer, and a 3-wire programmable bus complete the basic functional blocks of this IC. The MAX2362 supports single-band, single-mode (PCS) operation. The MAX2364 supports single-band cellular dual-mode operation. The MAX2360 enables architectural flexibility because its two IF voltage-controlled oscillators (VCOs), two IF ports, two RF LO input ports, and three PA driver output ports allow the use of a single receive IF frequency and split-band PCS filters for optimum out-of-band noise performance. The PA drivers allow up to three RF SAW filters to be eliminated. Select a mode of operation by loading data on the SPI™/QSPI™/MICROWIRE™-compatible 3-wire serial bus. Charge-pump current, sideband rejection, IF/RF gain balancing, standby, and shutdown are also controlled with the serial interface. The MAX2360/MAX2362/MAX2364 come in a 48-pin TQFP-EP package and are specified for the extended (-40°C to +85°C) temperature range. Applications High-Speed Data Modems High-Speed Digital Cordless Phones Satellite Phones Triple-Mode, Dual-Mode, or Single-Mode Mobile Phones Wireless Data Links (WAN/LAN) Wireless Local Area Networks (WLANs) Wireless Local Loop (WLL)

The MAX41461/MAX41462 is a UHF sub-GHz ISM/SRD transmitter is designed to transmit On-Off Keying (OOK) or Amplitude-Shift Keying (ASK) data in the 286MHz to 960MHz frequency range. It integrates a fractional phase-locked-loop (PLL), so a single, low-cost crystal can be used to generate commonly used world-wide sub-GHz frequencies. The fast response time of the PLL allows for frequency-hopping spread spectrum protocols for increased range and security. The chip also features preset modes with pin-selectable frequencies so that only one wire is required for external microcontroller interface. The only frequency-dependent components required are for the external antenna matching network. Optionally, the device can be put into programmable mode and programmed using an I 2 C interface. The crystal-based architecture of the MAX41461/MAX41462 eliminates many of the common problems with SAW-based transmitters by providing greater modulation depth, faster frequency settling, higher tolerance of the transmit frequency, and reduced temperature dependence. A clock-out signal at 800kHz is also provided. The MAX41461/MAX41462 provides output power up to +13dBm into a 50Ω load while drawing < 8mA (Manchester coded). The output load can be adjusted to increase power up to +16dBm, and a PA boost mode can be enabled at frequencies above 850MHz to compensate for losses. The PA output power can also be controlled using programmable register settings in I 2 C mode. The MAX41461/MAX41462 also features single-supply operation from +1.8V to +3.6V. The device has an auto-shutdown feature to extend battery life and a fast oscillator wake-up with data activity detection. The MAX41461/MAX41462 is available in a 10-pin μMAX package and is specified over the -40°C to +105°C extended temperature range. The MAX41461/MAX41462 has an ESD rating of 2.5kV HBM. Design Solution: How to Maximize the Wireless Power Range of Your UHF Sub-GHz Short-Range Device › Applications Automatic Meter Reading (AMR) Building Automation and Security Garage Door Openers (GDO) Internet of Things (IoT) Radio Control Toys Remote and Passive Keyless Entry (RKE/PKE) Tire Pressure Monitoring Systems (TPMS) Wireless Sensors and Alarms

The LT5518 is a direct I/Q modulator designed for high performance wireless applications, including wireless infrastructure. It allows direct modulation of an RF signal using differential baseband I and Q signals. It supports PHS, GSM, EDGE, TD-SCDMA, CDMA, CDMA2000, W-CDMA and other systems. It may also be configured as an image reject up-converting mixer, by applying 90° phase-shifted signals to the I and Q inputs. The high impedance I/Q baseband inputs consist of voltage-to-current converters that in turn drive double-balanced mixers. The outputs of these mixers are summed and applied to an on-chip RF transformer, which converts the differential mixer signals to a 50Ω single-ended output. The balanced I and Q baseband input ports are intended for DC coupling from a source with a common mode voltage level of about 2.1V. The LO path consists of an LO buffer with single-ended input, and precision quadrature generators that produce the LO drive for the mixers. The supply voltage range is 4.5V to 5.25V. Applications Infrastructure Tx for DCS, PCS and UMTS Bands Image Reject Up-Converters for DCS, PCS and UMTS Bands Low Noise Variable Phase-Shifter for 1.5GHz to 2.4GHz Local Oscillator Signals

The AD7010 is a complete low power, CMOS, pi/4 DQPSK modulator with single +5 V power supply. The part is designed to perform the baseband conversion of I and Q transmit waveforms in accordance with the Japanese Digital Cellular Telephone system. The on-chip pi/4 Differential Quadrature Phase Shift Keying (DQPSK) digital modulator, which includes the Root Raised Cosine filters, generates I and Q data in response to the transmit data stream. The AD7010 also contains ramp control envelope logic to shape the I and Q output waveforms when ramping up or down at the beginning or end of a transmit burst. Besides providing all the necessary logic to perform pi/4 DQPSK modulation, the part also provides reconstruction filters to smooth the DAC outputs, providing continuous time analog outputs. The AD7010 generates differential analog outputs for both the I and Q signals. As it is a necessity for all digital mobile systems to use the lowest possible power, the device has power down options. The AD7010 is housed in a space efficient 24-pin SSOP (Shrink Small Outline Package).

The HMC924LC5 is a compact GaAs MMIC I/Q upconverter in a leadless RoHS compliant SMT package. This device provides a small signal conversion gain of 15 dB with -30 dBc of sideband rejection. The HMC924LC5 utilizes a RF amplifier preceded by an I/Q mixer where the LO is driven by a driver amplifier. IF1 and IF2 mixer inputs are provided and an external 90° hybrid is needed to select the required sideband. The I/Q mixer topology reduces the need for filtering of the unwanted sideband. The HMC924LC5 is a much smaller alternative to hybrid style single sideband upconverter assemblies and it eliminates the need for wire bonding by allowing the use of surface mount manufacturing techniques. Applications Point-to-Point and Point-to-Multi-Point Radio Broadband Test & Measurement Military Radar, EW & ELINT Satellite Communications Sensors

The ADMV4540 is a highly integrated quadrature demodulator with integrated synthesizer ideally suited for next generation K band satellite communication. The RF front end of the ADMV4540 consists of two low noise amplifier (LNA) paths, each with an optimal cascaded, 5 dB, double sideband noise figure at maximum gain, while minimizing external components. The dual paths allow support for antenna polarization. Selection of the LNA path can be done through the SPI. The LNA output is then downconverted to baseband using an inphase and quadrature (I/Q) mixer. The I/Q mixer output is then fed into fully differential low noise and low distortion programmable filters and variable gain amplifiers (VGAs). Each channel is capable of rejecting large, out of band interferers while reliably boosting the wanted signal, thus reducing the bandwidth and resolution requirements on the analog-to-digital converters (ADCs) of the system. The excellent matching between channels and their high spurious-free dynamic range (SFDR) over all gain and bandwidth settings make the ADMV4540 ideal for satellite communication systems with dense constellations, multiple carriers, and nearby interferers. The three filter corners of 125 MHz, 250 MHz, and 500 MHz are all programmable via a serial peripheral interface (SPI). The filters provide a sixth-order Butterworth response with −3 dB corner frequencies of 141 MHz, 282 MHz, and 565 MHz. For operation beyond 565 MHz, the filter can be disabled and completely bypassed, thereby extending the −3 dB bandwidth up to 900 MHz. The high dynamic range baseband output amplifiers of the ADMV4540 provide an overall nominal conversion gain of 57 dB. The three baseband voltage variable attenuator (VVA) pins (VCTRL_BBVVAx) of the ADMV4540 can be used for automatic gain control (AGC), giving the ADMV4540 a wide RF input dynamic range. This feature rich device contains an integrated fractional-N phase-locked loop (PLL) and a low phase noise voltage controlled oscillator (VCO) that generates the necessary on-chip local oscillator (LO) signal for the two double balanced I/Q mixers, eliminating the need for external frequency synthesis. The VCO utilizes an internal automatic calibration routine that allows the PLL to select the necessary settings and lock. The reference input (REF IN ) to the PLL of the ADMV4540 employs a differentially excited crystal oscillator at 50 MHz. Alternatively, the REF IN can be driven by an external single-ended frequency reference up to 100 MHz. The phase frequency detector (PFD) comparison frequency operates up to 100 MHz, which allows for continuous LO coverage from 17 GHz to 21.5 GHz in extremely fine steps. The ADMV4540 operates on a 3.3 V supply with less than 3.2 W of total power dissipation. It is available in a 48-terminal, RoHS compliant, 7 mm × 7 mm LGA package with an exposed paddle. The ADMV4540 can operate over the −40℃ to +85℃ temperature range on a + 3.3 V power supply. APPLICATIONS Satellite communications

The ADRF6701 provides a quadrature modulator and synthesizer solution within a small 6 mm × 6 mm footprint while requiring minimal external components. The ADRF6701 is designed for RF outputs from 400 MHz to 1250 MHz. The low phase noise VCO and high performance quadrature modulator make the ADRF6701 suitable for next generation communication systems requiring high signal dynamic range and linearity. The integration of the IQ modulator, PLL, and VCO provides for significant board savings and reduces the BOM and design complexity. The integrated fractional-N PLL/synthesizer generates a 2× f LO input to the IQ modulator. The phase detector together with an external loop filter is used to control the VCO output. The VCO output is applied to a quadrature divider. To reduce spurious components, a sigma-delta (Σ-Δ) modulator controls the programmable PLL divider. The IQ modulator has wideband differential I and Q inputs, which support baseband as well as complex IF architectures. The single-ended modulator output is designed to drive a 50 Ω load impedance and can be disabled. The ADRF6701 is fabricated using an advanced silicon-germanium BiCMOS process. It is available in a 40-lead, exposed-paddle, Pb-free, 6 mm × 6 mm LFCSP package. Performance is specified from −40°C to +85°C. A lead-free evaluation board is available. APPLICATIONS Cellular communications systems GSM/EDGE, CDMA2000, W-CDMA, TD-SCDMA, LTE Broadband wireless access systems Satellite modems

The MAX2900–MAX2904 complete single-chip 200mW transmitters are designed for use in the 868MHz/915MHz frequency bands. The MAX2900/MAX2901/MAX2902 are compliant with the FCC CFR47 part 15.247 902MHz to 928MHz ISM-band specifications. MAX2903/MAX2904 are compliant with the ETSI EN330-220 specification for the European 868MHz ISM band. These transmitter ICs offer a high level of integration while minimizing the number of external components. This is achieved by full integration of the transmit modulator, power amplifier, RF VCO, 8-channel frequency synthesizer, and baseband PN sequence lowpass filter. By filtering the BPSK modulation, the spurious emissions are reduced, enabling up to eight independent transmit channels in the U.S. ISM band. Inputs are provided for spread-spectrum BPSK, ASK, and OOK. FM can be achieved by directly modulating the VCO. The devices are intended primarily for use with an external differential antenna. Applications Automatic Meter Reading Wireless Building Control Wireless Data Networks Wireless Security Systems/Alarms Wireless Sensors

The AD6122 is a low power IF transmitter subsystem, specifically designed for CDMA applications. It consists of an I and Q modulator, a divide-by-two quadrature generator, high dynamic range IF amplifiers with voltage-controlled gain and a power-down control input. An integral low dropout regulator allows operation from battery voltages from 2.9 V to 4.2 V. The AD6122 is now also available in a space-saving 5x5 mm LPCC package.

The HMC630LP3 & HMC630LP3E are high dynamic range Vector Modulator RFICs which are targeted for RF predistortion and feed-forward cancellation circuits, as well as RF beam forming and amplitude/ phase correction circuits. The I & Q ports of the HMC630LP3(E) can be used to continuously vary the phase and amplitude of RF signals by up to 360 degrees and 40 dB respectively, while supporting a 3 dB modulation bandwidth of 180 MHz. With an output IP3 of +24.5 dBm and output noise floor of -162 dBm/Hz (at maximum gain setting), the output IP3/ noise floor ratio is 186.5 dB. APPLICATIONS Wireless Infrastructure HPA & MCPA Error Correction Pre-Distortion or Feed-Forward Linearization Cellular/3G Systems Beam Forming or RF Cancellation Circuits

The HMC697LP4(E) is a low noise, high linearity Direct Quadrature Modulator RFIC which is ideal for digital modulation applications from 0.2 to 4.0 GHz including; Cellular/3G, WiMAX/4G, Broadband Wireless Access & ISM circuits. Housed in a compact 4x4 mm (LP4) SMT QFN package, the RFIC requires minimal external components & provides a low cost alternative to more complicated double upconversion architectures. The RF output port is single-ended and matched to 50 Ohms with no external components. The LO requires -6 to +6 dBm and can be driven in either differential or single-ended mode. This device is optimized for a +5V supply, and offers improved carrier feedthrough and sideband suppression characteristics. Applications UMTS, GSM or CDMA Basestations Fixed Wireless or WLL ISM Transceivers, 900 & 2400 MHz GMSK, QPSK, QAM, SSB Modulators Cellular/3G and WiMAX/4G

The HMC710 is a compact GaAs MMIC I/Q upconverter in a leadless RoHS compliant SMT package. This device provides a small signal conversion gain of 12 dB with -20 dBc of sideband rejection. The HMC710 utilizes a driver amplifier preceded by an I/Q mixer where the LO is driven by an active x2 multiplier. IF1 and IF2 mixer inputs are provided and an external 90° hybrid is needed to select the required sideband. The I/Q mixer topology reduces the need for filtering of the unwanted sideband. The HMC710 is a much smaller alternative to hybrid style single sideband upconverter assemblies and it eliminates the need for wire bonding by allowing the use of surface mount manufacturing techniques. Applications Point-to-Point & Point-to-Multi-Point Radio Military Radar, EW & ELINT Satellite Communications Sensors

This family of monolithic RF quadrature modulators is designed for use from 869 MHz to 960 MHz and from 1805 MHz to 1990 MHz. Excellent phase accuracy and amplitude balance enable high performance, direct RF modulation for communications systems. The ADL5590 and ADL5591 can be used as direct RF modulators in digital communications systems such as those using the Global System for Mobile Communications (GSM) network. In addition, the devices are compatible with enhanced data rates for GSM evolution (EDGE). This family is fabricated using an advanced silicon-germanium bipolar process from Analog Devices, Inc., and is available in a 36-lead, exposed pad LFCSP. The devices operate from −40°C to +85°C. Applications Wireless infrastructure Optimized for GSM transmitters