RFMD2080 RFMD2080 45MHz TO 2700MHz IQ MODULATOR WITH SYNTHESIZER/VCO AND BASEBAND INTERFACE Package: QFN, 32-Pin, 5mm x 5mm Features RF Output Frequency Range 45MHz to 2700MHz Fully Integrated Wideband VCOs and LO Buffers Ref. divider Integrated Phase Noise <0.2° rms at 1GHz Integrated Baseband Amplification Stage with Variable Gain and Filtering Tunable Baseband Filters Input 3dB Bandwidth from 1.5MHz to 10MHz -45dBc Unadjusted Carrier Suppression -40dBc Unadjusted Sideband Suppression Very Low Noise Floor -150dBm/Hz Typical Output P1dB +4dBm Output IP3 +18dBm 3.0V to 3.3V Power Supply Synth Typical Step Size 1.5Hz Phase det . Fractional-N Synthesizer with Very Low Spurious Levels 155mA Typical Current Consumption Serial Programming Interface Applications Satellite Communications QPSK/QAM Modulators SSB Modulators Software Defined Radios Functional Block Diagram Product Description The RFMD2080 is a low power, highly integrated, IQ modulator with integrated fractional-N synthesizer and voltage controlled oscillator (VCO). The RFMD2080 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 an oscillator signal covering 90MHz to 5400MHz. The 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. The device also features a differential input for an external VCO or LO source. The baseband I and Q stages are highly integrated; featuring variable gain and filtering as well as generation of DC offset voltages. The programmable DC offsets enable improved carrier suppression. The baseband input 3dB bandwidth can be tuned from 1.5MHz to 10MHz, and the total gain control range is 38dB with 2dB resolution. 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 155mA from a 3V supply. Optimum Technology Matching® Applied GaAs HBT GaAs MESFET InGaP HBT SiGe BiCMOS Si BiCMOS SiGe HBT GaAs pHEMT Si CMOS Si BJT GaN HEMT RF MEMS LDMOS RF MICRO DEVICES®, RFMD®, Optimum Technology Matching®, Enabling Wireless Connectivity™, PowerStar®, POLARIS™ TOTAL RADIO™ and UltimateBlue™ are trademarks of RFMD, LLC. BLUETOOTH is a trademark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks and registered trademarks are the property of their respective owners. ©2011, RF Micro Devices, Inc. DS140110 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 1 of 19 RFMD2080 Absolute Maximum Ratings Parameter Supply Voltage (VDD) Input Voltage (VIN), any pin Rating Unit -0.5 to +3.6 V -0.3 to VDD+0.3 V +15 dBm Operating Temperature Range -40 to +85 °C Storage Temperature Range -65 to +150 °C LO Input Power Caution! ESD sensitive device. Exceeding any one or a combination of the Absolute Maximum Rating conditions may cause permanent damage to the device. Extended application of Absolute Maximum Rating conditions to the device may reduce device reliability. Specified typical performance or functional operation of the device under Absolute Maximum Rating conditions is not implied. The information in this publication is believed to be accurate and reliable. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents, or other rights of third parties, resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. RFMD Green: RoHS compliant per EU Directive 2002/95/EC, halogen free per IEC 61249-2-21, < 1000ppm each of antimony trioxide in polymeric materials and red phosphorus as a flame retardant, and <2% antimony in solder. Parameter Min. Specification Typ. Max. Unit Condition ESD Requirements Human Body Model Charge Device Model 2000 V DC Pins 1500 V All Pins 1000 V All Pins Operating Conditions Supply Voltage (VDD) 3.0 3.3 V Temperature -40 +85 °C Input Low voltage -0.3 +0.5 V Input High voltage VDD / 1.5 VDD V Input Low current -10 +10 A Input = 0V Input High current -10 +10 A Input = VDD Output Low voltage 0 0.2*VDD V Output High voltage 0.8*VDD VDD Logic Inputs/Outputs (VDD = Supply to DIG_VDD pin) Load Resistance 10 V K Load Capacitance 20 pF GPO Drive Capability Sink Current 20 mA At VOL = +0.6V Source Current 20 mA At VOH = +2.4V Output Impedance 25 Static Supply Current (IDD) Standby Power Down Current 2 of 19 155 mA 2 mA Reference Oscillator and Bandgap Only 300 A ENBL = 0 and REF_STBY = 0 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS140110 RFMD2080 Parameter Min. Specification Typ. Max. Unit Condition Modulator (Output driving 4:1 balun) I and Q Input Max 3dB Bandwidth 10 MHz Filter Setting rctune = 0 I and Q Input Min 3dB Bandwidth 1.5 MHz Filter Setting rctune = 63 Differential with 0.5V to 1.5V Input DC Bias I and Q Input Voltage 1 VP-P Output Power -3 dBm Output Noise Floor -150 dBm/Hz Output IP3 +18 dBm Output P1dB +4 dBm Carrier Suppression -45 dBc Unadjusted Carrier Suppression -55 dBc DC Bias Offset DACs Adjusted dBc Unadjusted Sideband Suppression -40 Output Port Center Frequency Range 45 2700 MHz External Reference Frequency 10 104 MHz Reference Divider Ratio 1 7 At 10MHz Offset Reference Oscillator External Reference Input Level 500 800 1500 mVP-P 5400 MHz AC-coupled Synthesizer (PLL closed loop, 52MHz reference) Synthesizer Output frequency 90 Phase Detector Frequency 52 Phase Noise, LO=1GHz Phase Noise, LO=2GHz MHz -108 dBc/Hz 10kHz Offset -108 dBc/Hz 100kHz Offset -135 dBc/Hz 1MHz Offset 0.19 Deg -102 dBc/Hz 10kHz Offset -102 dBc/Hz 100kHz Offset 1MHz Offset RMS Integrated from 1KHz to 40MHz -130 dBc/Hz 0.32 Deg RMS Integrated from 1KHz to 40MHz -214 dBc/Hz Measured at 20kHz to 30kHz Offset 2.5GHz LO Frequency -134 dBc/Hz VCO3, LO Divide by 2 2.0GHz LO Frequency -135 dBc/Hz VCO2, LO Divide by 2 1.5GHz LO Frequency -136 dBc/Hz VCO1, LO Divide by 2 Normalized phase noise floor Voltage Controlled Oscillator Open Loop Phase Noise at 1MHz Offset Open loop phase noise at 10MHz offset 2.5GHz LO Frequency -149 dBc/Hz VCO3, LO Divide by 2 2.0GHz LO Frequency -150 dBc/Hz VCO2, LO Divide by 2 1.5GHz LO Frequency -151 dBc/Hz VCO1, LO Divide by 2 External LO Input LO Input Frequency Range External LO Input Level DS140110 90 5400 0 MHz dBm Driven from 50 source via a 1:1 balun 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 3 of 19 RFMD2080 Pin Names and Descriptions Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Name ENBL/GPO5 EXT_LO EXT_LO_DEC REXT ANA_VDD1 LFILT1 LFILT2 LFILT3 MODE/GPO6 REF_IN NC TM RF_OUT_N RF_OUT_P GPO1/ADD1 GPO2/ADD2 DIG_VDD MOD_Q_N MOD_Q_P NC NC MOD_I_N MOD_I_P ANA_VDD2 GPO3 GPO4/LD/DO NC NC RESETX ENX SCLK SDATA Exposed Paddles Description Device Enable pin (see note 1 and 2). External local oscillator input. Use AC coupling capacitor. Decoupling pin for external local oscillator. Use AC coupling capacitor. External bandgap bias resistor (see note 3). Analog supply. Use good RF decoupling. Phase detector output. Low-frequency noise-sensitive node. Loop filter op-amp output. Low-frequency noise-sensitive node. VCO control input. Low-frequency noise-sensitive node. Mode select pin (see notes 1 and 2). Reference input. Use AC coupling capacitor. Connect to ground. Differential output (see note 5). Differential output (see note 5). General purpose output / MultiSlice address bit. General purpose output / MultiSlice address bit. Digital supply. Should be decoupled as close to the pin as possible. Modulator Q differential input (see note 4). Modulator Q differential input (see note 4). Modulator I differential input (see note 4). Modulator I differential input (see note 4). Analog supply. Use good RF decoupling. General purpose output General purpose output / Lock detect output / serial data out. Chip reset (active low). Connect to DIG_VDD if asynchronous reset is not required. Serial interface select (active low) (See note 1). Serial interface clock (See note 1). Serial interface data (See note 1). Ground reference, should be connected to PCB ground through a low impedance path. Notes: 1. An RC low pass filter may be used on this line to reduce digital noise. 2. If the device is under software control this input can be configured as a general purpose output (GPO). 3. Connect a 51K resistor from this pin to ground. This pin is sensitive to low frequency noise injection. 4. DC bias voltage and modulation should be applied to this pin. 5. This pin must be connected to ANA_VDD2 using an RF choke or center tapped transformer (see application schematic). 4 of 19 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS140110 RFMD2080 Theory of Operation The RFMD2080 is a wideband IQ modulator with integrated fractional-N synthesizer and a low noise VCO core. It features a high accuracy LO quadrature divider followed by buffer circuits which drive the I and Q mixers of the modulator with the quadrature LO signals. The RFMD2080 has an integrated voltage reference and low drop out regulators supplying critical circuit blocks such as the VCOs and synthesizer. Synthesizer programming, device configuration and control are achieved through a mixture of hardware and software controls. All on-chip registers are programmed through a simple three-wire serial interface. VCO The VCO core in the RFMD2080 consists of three VCOs which, in conjunction with the integrated LO dividers of /1 to /32, cover the frequency range of 90MHz to 5400MHz. The modulator quadrature divider provides a further fixed divide by two to give the center frequency range at the modulator output of 45MHz to 2700MHz. Each VCO has 128 overlapping bands which are used to achieve low VCO gain and optimal phase noise performance across the whole tuning range. The chip automatically selects the correct VCO (VCO auto-select) and the correct VCO band (VCO coarse tuning) to generate the desired LO frequency based on the values programmed into the PLL1 and PLL2 registers banks. The VCO auto-select and VCO coarse tuning are triggered every time ENBL is taken high, or if the PLL re-lock self clearing bit is programmed high. Once the correct VCO and band have been selected the PLL will lock onto the correct frequency. During the band selection process fixed capacitance elements are progressively connected to the VCO resonant circuit until the VCO is oscillating at approximately the correct frequency. The output of this band selection, CT_CAL, is made available in the readback register. If this was unsuccessful it will be indicated by the CT_FAILED flag also available in the read-back register. A value between 1 and 126 indicates a successful calibration, the actual value being dependent on the desired frequency as well as process variation for a particular device. The band select process will center the VCO tuning voltage at about 0.8V, compensating for manufacturing tolerances and process variation as well as environmental factors including temperature. In applications where the device is left enabled at the same LO frequency for some time it is recommended that automatic band selection be performed for every 30°C change in temperature. This assumes an active loop filter. The RFMD2080 features a differential LO input to allow the mixer to be driven from an external LO source. The fractional-N PLL can be used with an external VCO driven into this LO input, which may be useful to reduce phase noise in some applications. This may also require an external op-amp, dependant on the tuning voltage required by the external VCO. Fractional-N PLL The RFMD2080 contains a charge-pump based fractional-N phase locked loop (PLL) for controlling the three VCOs. The PLL includes automatic calibration systems to counteract the effects of process and environmental variations, ensuring repeatable loop response and phase noise performance. As well as the VCO auto-select and coarse tuning, there is a loop filter calibration mechanism which can be enabled if required. This operates by adjusting the charge pump current to maintain loop bandwidth. This can be useful for applications where the LO is tuned over a wide frequency range. The PLL has been designed to use a reference frequency of between 10MHz and 104MHz from an external source, which is typically a temperature controlled crystal oscillator (TCXO). A reference divider (divide by 1 to divide by 7) is supplied and should be programmed to limit the frequency at the phase detector to a maximum of 52MHz. Two PLL programming banks are provided, the first bank is preceded by the label PLL1 and the second bank is preceded by the label PLL2. The active register bank is selected by the state of the MODE pin, low for PLL1 and high for PLL2. The VCO outputs are first divided down in a high frequency prescalar. The output of this high frequency prescalar then enters the N divider, which is a fractional divider containing a dual-modulus prescalar and a digitally spur-compensated fractional sequence generator. This allows very fine frequency steps and minimizes fractional spurs. The fractional energy is shaped and appears as fractional noise at frequency offsets above 100KHz which will be attenuated by the loop filter. An external loop filter is used, giving flexibility in setting loop bandwidth for optimizing phase noise and lock time, for example. DS140110 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 5 of 19 RFMD2080 The synthesizer step size is typically 1.5Hz when using a 26MHz reference frequency. The exact step size for any reference and LO frequency can be calculated using the following formula: (FREF * P) / (R * 224 * LO_DIV*2) Where FREF is the reference frequency, R is the reference division ratio, P is the prescalar division ratio, and LO_DIV is the LO divider value. Pin 26 (GPO4) can be configured as a lock detect pin. The lock status is also available in the read-back register. The lock detect function is a window detector on the VCO tuning voltage. The lock flag will be high to show PLL lock which corresponds to the VCO tuning voltage being within the specified range, typically 0.30V to 1.25V. The lock time of the PLL will depend on a number of factors; including the loop bandwidth and the reference frequency at the phase detector. This clock frequency determines the speed at which the state machine and internal calibrations run. A 52MHz phase detector frequency will give fastest lock times, of typically <50secs when using the PLL re-lock bit. Phase Detector and Charge Pump The phase detector provides a current output to drive an active loop filter. The charge pump output current is set by the value contained in the P1_CP_DEF and P2_CP_DEF fields in the loop filter configuration register. The charge pump current is given by approximately 3A/bit, and the fields are 6 bits long. This gives default value (31) of 93A and maximum value (63) of 189A. If the automatic loop bandwidth calibration is enabled the charge pump current is set by the calibration algorithm based upon the VCO gain. The phase detector will operate with a maximum input frequency of 52MHz. Loop Filter The active loop filter is implemented using the on-chip low noise op-amp, with external resistors and capacitors. The op-amp gives a tuning voltage range of typically +0.1V to +2.4V. The internal configuration of the chip is shown below with the recommended active loop filter. The loop filter shown is designed to give lowest integrated phase noise, for reference frequencies of between 26MHz and 52MHz. The external loop filter components give the flexibility to optimize the loop response for any particular application and combination of reference and VCO frequencies. 8p2 LFILT1 180p 22K LFILT2 470R 330p +1.1V 6 of 19 470R LFILT3 330p 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS140110 RFMD2080 External Reference The RFMD2080 has been designed to use an external reference such as a TCXO. The typical input will be a 0.8Vp-p clipped sine wave, which should be AC-coupled into the reference input. When the PLL is not in use, it may be desirable to turn off the internal reference circuits, by setting the REFSTBY bit low, to minimize current draw while in standby mode. On cold start, or if REFSTBY is programmed low, the TCXO will need a warm-up period. This is set by the SU_WAIT bits. This will allow the clock to be stable and immediately available when the ENBL bit is asserted high, allowing the PLL to assume normal operation. If the current consumption of the reference circuits in standby mode, typically 2mA, is not critical, then the REFSTBY bit can be set high. This allows the fastest startup and lock time after ENBL is taken high. IQ Modulator The IQ modulator core of the RFMD2080 is wideband covering from 45MHz to 2700MHz. It has been designed to achieve exceptional linearity for the amount of DC power consumed. The modulator mixer cores have four coarse gain/current settings. Each setting steps the gain and linearity by 6dB and can be used to optimize performance or reduce power consumption. The best linearity is achieved using the modulator bias setting MODDC=4. This setting adjusts bias mixer current and can be used to trade off linearity and current consumption. The modulator output is differential and requires a balun and simple matching circuit optimized to the specific application frequencies. The modulator output pins are also used to source current for the modulator mixer circuits, about 10mA on each pin. This is usually via a center-tapped balun or by RF chokes in the external matching circuitry to the supply. The modulator output is high impedance, consisting of approximately 2K resistance in parallel with some capacitance, approximately 1pF. The modulator output does not require a conjugate matching network. It is a constant current output which will drive a real differential load of typically 200. Since the mixer output is a constant current source, a higher resistance load will give higher output power and gain. A shunt inductor can be used to resonate with the mixer output capacitance at the frequency of interest. This inductor may not be required at lower frequencies where the impedance of the output capacitance is less significant. At higher output frequencies the inductance of the bond wires (about 0.5nH on each pin) becomes more significant. The following diagram is a simple model of the modulator output: 0.5nH 1K RFMD2080 RF Output 1pF 1K 0.5nH It is recommended to use a 4:1 balun on the modulator output, presenting 200 to the output in a single ended 50 system. The RFMD2080 evaluation board has an RFXF8553 wideband transmission line transformer. Baseband Section The RFMD2080 features a baseband section that consists of an active low pass filter, variable attenuator and DC offset control circuitry. DC offset calibration is performed using digital-to-analog converters (DACs) that apply an offset voltage to various parts of the circuit to compensate for DC offsets introduced by the internal buffers and the mixer core. This can be done to optimize LO suppression by setting registers to program the DAC offset voltages. DS140110 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 7 of 19 RFMD2080 dcdac_ai rc_tune dcdac_i DAC DAC I I_p I_n 10K 10K bb_atten cal_blank rc_tune dcdac_q dcdac_aq rc_tune DAC DAC Q Q_p Q_n 10K 10K bb_atten cal_blank rc_tune The differential I and Q input impedance is set by 10K pull down resistors on each pin, so presenting 20K differential impedance. The baseband input signals will be typically 1Vp-p differential. A common mode DC voltage between 0.5V and 1.5V is required for optimal performance. If required the phase and amplitude of either of the I or Q signal can be adjusted to reduce the level of the unwanted sideband signal at the modulator output. The baseband path consists of an active low pass filter with variable capacitors. The variable capacitors provide 64 "rctune" settings that allow the input 3dB bandwidth to be tuned from 1.5MHz to 10MHz. This is followed by a variable gain attenuator that delivers 0dB to -20dB gain in 2dB steps. Additionally, the mixers have gain control, ranging from 0dB to -18dB in 6dB steps giving a maximum range of 38dB. The variable gain attenuator and mixer input have DACs attached to allow DC offsets within the baseband path to be corrected, thus reducing LO breakthrough. An isolation switch sits between the variable gain attenuator and the mixer input to allow their offsets to be compensated separately. This may be required since the offset within the variable gain attenuator will vary with gain and thus its DC compensation may also have to vary for optimum LO cancellation. Serial Interface All on-chip registers in the RFMD2080 are programmed using a proprietary 3-wire serial bus which supports both write and read operations. Synthesizer programming, device configuration and control are achieved through a mixture of hardware and software controls. Hardware pins can be used to control ENBL, MODE and RESETX or the device can be programmed entirely via the serial bus. The serial data interface can be configured for 4-wire operation, by setting the '4WIRE' bit in the SDI_CTRL register high. Then pin 26 is used as the data out pin, and pin 32 is the serial data in pin. 8 of 19 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS140110 RFMD2080 Hardware Control Three hardware control pins are provided: ENBL, MODE, and RESETX. The ENBL pin has two functions: to enable the analog circuits in the chip and to trigger the VCO auto-selection and coarse tuning mechanisms. The VCO auto-selection and coarse tuning are initiated when the ENBL pin is taken high. Every time the frequency of the synthesizer is reprogrammed, ENBL has to be asserted high to initiate these mechanisms and then to initiate the PLL locking. Alternatively following the programming of a new frequency the PLL re-lock self clearing bit could be used. If the device is left in the enabled state for long periods, it is recommended that VCO auto-selection and coarse tuning (band selection) is performed for every 30°C change in temperature. The lock detect flag can be used to indicate when to perform the VCO calibration; it shows that the VCO tuning voltage has drifted significantly with changing temperature. The RESETX pin is a hardware reset control that will reset all digital circuits to their startup state when asserted low. The device includes a power-on-reset function, so this pin should not normally be required, in which case it should be connected to the positive supply. The MODE pin controls which PLL programming register bank is active. Serial Data Interface Control The normal mode of operation uses the 3-wire serial data interface to program the device registers, and three extra hardware control lines; MODE, ENBL and RESETX. When the device is under software control, achieved by setting the SIPIN bit in the SDI_CTRL register high, then the hardware can be controlled via the SDI_CTRL register. When this is the case, the MODE and ENBL control lines are not required. If the device is under software control, pins 1 and 9 can be configured as general purpose outputs (GPO). Multi-Slice Mode ENX SDATA SCLK Slice 2 (0) Slice2 (1) A1 A2 A1 A2 Slice2 (2) Slice2 (3) A1 A2 Vdd Vdd A1 A2 Vdd Vdd The Multi-Slice mode of operation allows up to four chips to be controlled from a common serial bus. The device address pins, (15 and 16) ADD1 and ADD2, are used to set the address of each part. On power up, and after a Reset, the devices ignore the address pins ADD1 and ADD2 and any data presented to the serial bus will be programmed into all the devices. However, once the 'ADDR' bit in the SDI_CTRL register is set each device then adopts an address according to the state of the address pins on the device. General Purpose Outputs The general purpose outputs (GPOs) can be controlled via the GPO register, and will depend on the state of MODE since they can be set in different states corresponding to either path 1 or 2. The GPOs can be used for example to drive LEDs, or to control external circuitry such as switches or low power LNAs. DS140110 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 9 of 19 RFMD2080 Each GPO pin can supply up to and above 20mA load current. The output voltage of the GPO high state will drop with increased current drive, by approximately 25mV/mA. Similarly the output voltage of the GPO low state will rise with increased current, again by approximately 25mV/mA. Programming Information Please refer to the register map and programming guides which are available for download from http://rfmd.com/products/IntSynthModulator/. Evaluation Boards The evaluation board for the RFMD2080 is provided as part of a design kit, along with the necessary cables and programming software tool to enable full evaluation of the device. The evaluation board has been configured for wideband operation; the modulator output is connected to a wideband transmission line transformer balun. Design kits can be ordered from www.rfmd.com or from local RFMD sales offices and authorized sales channels. For ordering codes please see "Ordering Information" on the last page of this data sheet. For further details on how to set up the design kits please refer to the user guide which can be downloaded from http://rfmd.com/products/IntSynthModulator/. 10 of 19 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS140110 RFMD2080 Detailed Functional Block Diagram Biasing & LDOs Ext LO Mux /2n [n=0..5] I Prescaler Sequence generator Ndivider /2 IQ gen Charge pump Phase detector Control Reference divider Q GPIO Pin Out GPO3 25 GPO4/LD/DO 26 NC 27 NC 28 RESETX 29 ENX 30 SCLK 31 SDATA 32 ENBL/GPO5 1 24 ANA_VDD2 23 MOD_I_P EXT_LO 2 EXT_LO_DEC 3 REXT 4 22 MOD_I_N 20 NC LFILT1 6 19 MOD_Q_P LFILT2 7 18 MOD_Q_N LFILT3 8 17 DIG_VDD 16 GPO2/ADD2 15 GPO1/ADD1 14 RF_OUT_P 13 RF_OUT_N 12 TM 11 NC 10 REF_IN 9 MODE/GPO6 DS140110 21 NC Exposed paddle ANA_VDD1 5 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 11 of 19 RFMD2080 Application Schematic LFILT1 LFILT2 R3 22K C9 180pF RESETX ENX SCLK SDATA ENBL VDDA1 C34 10nF C5 33pF C35 33pF R1 51K R6 470R Loop Filter R2 470R C8 8.2pF C10 330pF C15 33pF C14 33pF 1 2 3 4 7 6 5 LFILT1 LFILT3 LFILT2 LFILT1 C1 33pF ANA_VDD1 REXT EXT_LO_DEC EXT_LO ENBL/GP05 C13 33pF VC VCC GND OUT Y1 8 LFILT2 1 2 LFILT3 LFILT3 C17 330pF 470R R32 VCTCXO R9 470R 3 4 C44 10nF C16 1nF U1 L1 DNI GPO2 GPO1 GPO3 GREEN D1 VDDA2 C2 33pF C18 10nF MOD_I_P 21 MOD_Q_P 20 MOD_Q_N C19 10nF C30 100pF C29 100pF 50 OHM (0.5mm) 18 17 T1 6 4 19 VDDD MOD_I_N C3 33pF 22 RFXF8553 23 24 R13 220R 2 1 C33 100pF VDDA2 3 DIG_VDD MOD_Q_N MOD_Q_P NC NC MOD_I_N MOD_I_P ANA_VDD2 GPO4 RFMD2080 R31 120R VDDA2 +2.8V 25 GPO3/FM 33 GPO2/ADD2 16 RF_OP 1 J4 RF_OP DS140110 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 12 of 19 VDDA2 C43 10nF 2 GPO4/LD/DO 26 GPO1/ADD1 15 RF_OUT_P 14 RF_OUT_N 13 GND 27 NC 28 NC 29 RESETX 30 ENX NC 11 TM 12 31 SCLK 32 SDATA MODE/GP06 9 REF_IN 10 RFMD2080 Typical Performance Characteristics: Synthesizer VDD = +3V and TA = +27°C unless stated otherwise, as measured on RFMD2080 evaluation board Synthesizer Phase Noise Synthesizer Phase Noise 5200MHz VCO Frequency, 26MHz Crystal Oscillator 5200MHz VCO Frequency, 52MHz Crystal Oscillator -60.0 -60.0 -70.0 -80.0 2600MHz -70.0 1300MHz -80.0 2600MHz 1300MHz 650MHz -90.0 Phase Noise (dBc/Hz) Phase Noise (dBc/Hz) 650MHz 325MHz 162.5MHz -100.0 -110.0 -120.0 -130.0 -90.0 325MHz 162.5MHz -100.0 -110.0 -120.0 -130.0 -140.0 -140.0 -150.0 -150.0 -160.0 -160.0 1.0 10.0 100.0 1000.0 10000.0 1.0 100000.0 10.0 1000.0 10000.0 100000.0 Synthesizer Phase Noise Synthesizer Phase Noise 4000MHz VCO Frequency, 52MHz Crystal Oscillator 4000MHz VCO Frequency, 26MHz Crystal Oscillator -60.0 -60.0 2000MHz -70.0 Phase Noise (dBc/Hz) 500MHz 250MHz 125MHz -100.0 1000MHz -80.0 500MHz -90.0 2000MHz -70.0 1000MHz -80.0 Phase Noise (dBc/Hz) 100.0 Offset Frequency (KHz) Offset Frequency (KHz) -110.0 -120.0 -130.0 -140.0 -90.0 250MHz 125MHz -100.0 -110.0 -120.0 -130.0 -140.0 -150.0 -150.0 -160.0 -160.0 1.0 10.0 100.0 1000.0 10000.0 100000.0 Offset Frequency (KHz) 1.0 10.0 100.0 1000.0 10000.0 100000.0 Offset Frequency (KHz) Synthesiser RMS Integrated Phase Noise Integration Bandwidth 1KHz to 40MHz RMS Integrated Phase Noise (Degrees) 0.6 26MHz TCXO 0.5 52MHz TCXO 0.4 0.3 0.2 Note: • 26 MHz Crystal Oscillator: NDK ENA3523A • 52 MHz Crystal Oscillator: NDK ENA3560A 0.1 0.0 0.0 500.0 1000.0 1500.0 2000.0 2500.0 3000.0 LO Frequency (MHz) DS140110 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 13 of 19 RFMD2080 Typical Performance Characteristics: VCO VDD = +3V and TA = +27°C unless stated otherwise, as measured on RFMD2080 evaluation board VCO1 Frequency versus Kvco VCO1 Frequency versus CT_CAL LO Divide by 2 VCO1 with LO Divide by 2 25 1800 -40 Deg C 1700 20 Kvco (MHz/V) VCO Frequency (MHz) +27 Deg C +85 Deg C 1600 1500 VCO1 15 10 1400 5 1300 0 1200 1200 0 20 40 60 80 100 120 1300 1400 1500 1600 1700 1800 VCO Frequency /2 (MHz) CT_CAL Word VCO2 Frequency versus CT_CAL VCO2 Frequency versus Kvco VCO2 with LO Divide by 2 LO Divide by 2 2300 30 2200 -40 Deg C 25 +85 Deg C Kvco (MHz/V) VCO Frequency (MHz) +27 Deg C 2100 2000 1900 VCO2 20 15 10 1800 5 1700 1600 0 20 40 60 80 100 0 1600 120 1700 1800 CT_CAL Word VCO3 Frequency versus CT_CAL 2100 2200 2300 LO Divide by 2 30 2800 -40 Deg C 25 +27 Deg C 2700 +85 Deg C Kvco (MHz/V) VCO Frequency (MHz) 2000 VCO3 Frequency versus Kvco VCO3 with LO Divide by 2 2900 2600 2500 2400 VCO3 20 15 10 2300 5 2200 2100 0 20 40 60 CT_CAL Word 14 of 19 1900 VCO Frequency /2 (MHz) 80 100 120 0 2200 2300 2400 2500 2600 2700 2800 2900 VCO Frequency /2 (MHz) 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS140110 RFMD2080 Typical Performance Characteristics: VCO VDD = +3V and TA = +27°C unless stated otherwise, as measured on RFMD2080 evaluation board VCO2 Frequency versus Tuning Voltage VCO1 Frequency versus Tuning Voltage For the same coarse tune setting, LO divide by two For the same coarse tune setting, LO divide by two 2020 1505 2015 VCO2 Frequency /2 (MHz) VCO1 Frequency /2 (MHz) 1500 1495 1490 1485 -40 Deg C +27 Deg C 1480 +85 Deg C 2010 2005 2000 1995 -40 Deg C 1990 +27 Deg C +85 Deg C 1985 1980 1475 0.0 0.5 1.0 0.0 1.5 VCO3 Frequency versus Tuning Voltage 1.5 With LO Divide by 2 2515 -60.0 2510 -70.0 2505 -80.0 Phase Noise (dBc/Hz) VCO3 Frequency /2 (MHz) 1.0 VCO Phase Noise For the same coarse tune setting, LO divide by two 2500 2495 2490 2485 2480 2500MHz VCO3 2000MHz VCO2 1500MHz VCO1 -90.0 -100.0 -110.0 -120.0 -130.0 -40 Deg C 2475 -140.0 +27 Deg C 2470 -150.0 +85 Deg C 2465 0.0 0.5 1.0 Tuning Voltage (Volts) DS140110 0.5 Tuning Voltage (Volts) Tuning Voltage (Volts) 1.5 -160.0 10.0 100.0 1000.0 10000.0 100000.0 Offset Frequency (KHz) 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 15 of 19 RFMD2080 Typical Performance Characteristics: IQ Modulator VDD = +3V and TA = +27°C unless stated otherwise, as measured on RFMD2080 evaluation board. I and Q Input Level 1VP-P differential with +1.15V DC bias. DC bias current setting in modulator core, moddc = 4. Modulator Typical Performance Modulator Typical Performance Linearity, Output Unmatched I & Q Unadjusted, Output Unmatched 0.0 20.0 0.0 15.0 -10.0 Wanted Signal Level (dBm) -10.0 Sideband Suppression -30.0 -30.0 LO Suppression IM3 Product -40.0 -40.0 -50.0 -50.0 -60.0 -60.0 -70.0 -70.0 3000.0 Output Level (dBm) -20.0 Wanted Signal Suppression (dBc) 10.0 -20.0 5.0 0.0 -5.0 -10.0 Wanted Signal Output P1dB -15.0 Output IP3 0.0 500.0 1000.0 1500.0 2000.0 2500.0 -20.0 0.0 500.0 1000.0 1500.0 2000.0 2500.0 3000.0 Output Frequency (MHz) Output Frequency (MHz) Modulator Output Frequency Response +1.3V Input Bias; Moddc=4 Versus Shunt Matching Inductor Value Typical Supply Current 165.0 160.0 -10.0 Supply Current (mA) Wanted Signal Level (dBm) 0.0 Unmatched -20.0 27nH Shunt 15nH Shunt 8.2nH Shunt -30.0 3.9nH Shunt 2.7nH Shunt 155.0 150.0 85DegC, 3.0V 85DegC, 3.3V 27DegC, 3.0V 27DegC, 3.3V -40DegC, 3.0V -40DegC, 3.3V 145.0 -40.0 140.0 -50.0 0.0 500.0 1000.0 1500.0 2000.0 2500.0 135.0 10.0 3000.0 100.0 Baseband Input Bandwidth "rctune" Setting; +3.0V; +27C Versus "rctune" Setting, Voltage & Temperature 0.0 -5.0 -8.0 rctune=0 rctune=8 rctune=16 rctune=24 rctune=32 rctune=40 rctune=48 rctune=56 rctune=63 -15.0 -20.0 -40DegC, +3.0V, rctune=0 -40DegC, +3.0V, rctune=63 -40DegC, +3.3V, rctune=0 -40DegC, +3.3V, rctune=63 +27DegC, +3.0V, rctune=0 +27DegC, +3.0V, rctune=63 +27DegC, +3.3V, rctune=0 +27DegC, +3.3V, rctune=63 +85DegC, +3.0V, rctune=0 +85DegC, +3.0V, rctune=63 +85DegC, +3.3V, rctune=0 +85DegC, +3.3V, rctune=63 -16.0 -24.0 -32.0 0.1 1.0 Baseband Frequency (MHz) 16 of 19 10000.0 Baseband Input Bandwidth 0.0 -10.0 1000.0 Output Frequency (MHz) Output Power (dBm) Output Power (dBm) Output Frequency (MHz) 10.0 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 Baseband Frequency (MHz) 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS140110 RFMD2080 Typical Performance Characteristics: IQ Modulator VDD = +3V and TA = +27°C unless stated otherwise, as measured on RFMD2080 evaluation board. I and Q Input Level 1VP-P differential with +1.15V DC bias. DC bias current setting in modulator core, moddc = 4. Modulator Unadjusted LO Suppression Modulator Output Power Vs Temperature & Supply Voltage Vs Temperature & Supply Voltage -30.0 0.0 -40DegC, +3.0V -40DegC, +3.0V -40DegC, +3.3V -40DegC, +3.3V -2.0 -35.0 +27DegC, +3.0V +27DegC, +3.3V -4.0 LO Suppression (dBc) Wanted Signal Level (dBm) +27DegC, +3.0V +85DegC, +3.0V +85DegC, +3.3V -6.0 -8.0 -10.0 +27DegC, +3.3V +85DegC, +3.0V -40.0 +85DegC, +3.3V -45.0 -50.0 -55.0 -12.0 -60.0 -14.0 0.0 500.0 1000.0 1500.0 2000.0 2500.0 0.0 3000.0 500.0 1000.0 1500.0 2000.0 2500.0 3000.0 Output Frequency (MHz) Output Frequency (MHz) Modulator IM3 Output Tone Modulator Unadjusted Sideband Suppression Vs Temperature & Supply Voltage Vs Temperature & Supply Voltage -30.0 -30.0 -40DegC, +3.0V -40DegC, +3.3V -35.0 +27DegC, +3.0V +27DegC, +3.3V +85DegC, +3.0V -40.0 +85DegC, +3.3V -45.0 -50.0 IM3 Product (dBc) Sideband Suppression (dBc) -35.0 -40.0 -45.0 -40DegC, +3.0V -40DegC, +3.3V -50.0 +27DegC, +3.0V +27DegC, +3.3V -55.0 -55.0 -60.0 -60.0 +85DegC, +3.0V +85DegC, +3.3V 0.0 500.0 1000.0 1500.0 2000.0 2500.0 0.0 3000.0 500.0 1000.0 1500.0 2000.0 2500.0 3000.0 Output Frequency (MHz) Output Frequency (MHz) Modulator Output Power for 1dB Compression Modulator Output IP3 Vs Temperature & Supply Voltage Vs Temperature & Supply Voltage 8.0 21.0 6.0 19.0 4.0 17.0 -40DegC, +3.0V -40DegC, +3.3V Ouput IP3 (dBm) Output Level (dBm) +27DegC, +3.0V 2.0 0.0 -40DegC, +3.0V -2.0 -40DegC, +3.3V +27DegC, +3.0V -4.0 +27DegC, +3.3V +85DegC, +3.0V 15.0 +85DegC, +3.3V 13.0 11.0 9.0 +27DegC, +3.3V +85DegC, +3.0V -6.0 7.0 +85DegC, +3.3V 5.0 -8.0 0.0 500.0 1000.0 1500.0 2000.0 Output Frequency (MHz) DS140110 2500.0 3000.0 0.0 500.0 1000.0 1500.0 2000.0 2500.0 3000.0 Output Frequency (MHz) 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 17 of 19 RFMD2080 Typical Performance Characteristics: IQ Modulator VDD = +3V and TA = +27°C unless stated otherwise, as measured on RFMD2080 evaluation board. I and Q Input Level 1VP-P differential with +1.15V DC bias. DC bias current setting in modulator core, moddc = 4. Modulator Output Noise Floor Modulator Output Noise Floor 1MHz Offset 5MHz Offset -130.0 -130.0 -40DegC, +3.0V -40DegC, +3.3V -135.0 Output Noise Floor (dBm/Hz) +27DegC, +3.3V -40DegC, +3.0V +85DegC, +3.0V -145.0 +85DegC, +3.3V -150.0 -155.0 -160.0 -165.0 +27DegC, +3.0V -140.0 +27DegC, +3.3V +85DegC, +3.0V -145.0 +85DegC, +3.3V -150.0 -155.0 -160.0 -165.0 -170.0 -170.0 0.0 500.0 1000.0 1500.0 2000.0 2500.0 3000.0 0.0 500.0 1.4 Effect of Gain Setting 1.2 1.1 1.0 0.0 160.0 155.0 -10.0 150.0 -15.0 145.0 -20.0 140.0 -25.0 135.0 Mod=0; Wanted Mod=1; Wanted Mod=2; Wanted Mod=3; Wanted Mod=0; Current Mod=1; Current Mod=2; Current Mod=3; Current -35.0 0.9 -40.0 0.8 -45.0 500.0 1000.0 1500.0 2000.0 2500.0 7 8 9 10 13 14 15 0.0 -45.0 -10.0 Mod=0, OIP3 Mod=1; OIP3 Mod=2; OIP3 Mod=3; OIP3 Mod=0; OP1dB Mod=1; OP1dB Mod=2; OP1dB Mod=3; OP1dB -20.0 -50.0 -30.0 -55.0 Gain (dB) 12 10.0 -40.0 -20.0 11 20.0 Mod=0; Sideband Mod=1; Sideband Mod=2; Sideband Mod=3; Sideband Mod=0; LO Mod=1; LO Mod=2; LO Mod=3; LO Level (dBm) Level (dBc) 6 OIP3 and OP1dB at 500 MHz -20.0 -30.0 120.0 Effect of Gain Setting on Linearity Sideband and LO Suppression at 500MHz -35.0 125.0 Baseband Attenuator Setting (bb_atten) Effect of Gain Setting on Modulator Performance -30.0 130.0 115.0 5 3000.0 Output Frequency (MHz) -25.0 3000.0 -5.0 -30.0 -60.0 -40.0 2500.0 Wanted and Current at 500MHz Output 1.3 0.0 18 of 19 2000.0 Vs Temperature & Supply Voltage -40DegC, +3.0V -40DegC, +3.3V +27DegC, +3.0V +27DegC, +3.3V +85DegC, +3.0V +85DegC, +3.3V 1.5 1500.0 Modulator Input Voltage for 1dB Compression Wanted (dBm) Peak to Peak Differential Voltage (Vp-p) 1.6 1000.0 Output Frequency (MHz) Output Frequency (MHz) Current (mA) Output Noise Floor (dBm/Hz) -140.0 -40DegC, +3.3V -135.0 +27DegC, +3.0V -10.0 0.0 -40.0 -40.0 -30.0 -20.0 -10.0 0.0 Gain (dB) 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS140110 RFMD2080 Package Drawing QFN, 32-pin, 5mm x 5mm Ordering Information DS140110 Ordering Code Package Quantity RFMD2080SB RFMD2080SQ RFMD2080SR RFMD2080TR7 RFMD2080TR13 DKMD2080 32-Pin QFN 32-Pin QFN 32-Pin QFN 32-Pin QFN 32-Pin QFN Complete Design Kit 5-Piece sample bag 25-Piece sample bag 100-Piece reel 750-Piece reel 2500-Piece reel 1 Box 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 19 of 19