v12 - Analog Devices

1 Order On-line at technical application questions: Phone: 978-250-3343 or & OPERATING GUIDEAA - 1 PLLs WITH INTEGRATED VCO - RF APPLICATIONS PRODUCT & OPERATING of Applicable Products .. General Description.. Functional Diagram.. Theory of Operation .. VCO Subsystem .. VCO Subsystem with Divide-by-2 Output.. VCO Subsystem with Fundamental Output .. VCO Subsystem with Doubler Output.. VCO Subsystem with Tri-band Output.. VCO Subsystem with Wideband Output .. VCO Calibration .. VCO Auto-Calibration (AutoCal).. AutoCal Use of Reg05h.. Auto-reLock on Lock Detect Failure .. Manual VCO Calibration .. Registers required for Frequency Changes in Fractional Mode.

2 Registers Required for Frequency Changes in Integer Mode .. VCO AutoCal on Frequency Change .. VCO AutoCal Time & Accuracy .. VCO AutoCal Example.. VCO Built in Test with AutoCal .. Spurious Performance .. Integer Operation and Reference Spurious .. Fractional Operation and Spurious .. Charge Pump and Phase Detector Spurious Considerations.. Spurious Related to Channel Step Size (Channel Spurs) .. Spurious Reduction with Tunable Reference .. Integrated Phase Noise & Jitter.. Reference Input Stage.. Reference Path R Divider .. RF Path N Divider .. Charge Pump & Phase Detector.. Phase Detector Functions .. Phase Detector Window Based Lock Detect.

3 Analog Window Lock Detect .. Digital Window Lock Detect .. Declaration of Lock.. Phase Offset & Fractional Linearity .. Digital Lock Detect with Digital Window Example .. Cycle Slip Prevention (CSP).. Charge Pump Gain.. Charge Pump Phase Offset - Fractional Mode.. Frequency Tuning ..1 Integer Mode ..26 Order On-line at technical application questions: Phone: 978-250-3343 or & OPERATING GUIDEAA - 2 PLLs WITH INTEGRATED VCO - RF APPLICATIONS PRODUCT & OPERATING Integer Frequency Tuning .. Fractional Mode .. Fractional Frequency Tuning .. Exact Frequency Tuning.. Using Hittite Exact Frequency Mode .. Configuring Exact Frequency Mode For a Particular Frequency.

4 Hittite Exact Frequency Channel Mode .. Seed Register & AutoSeed Mode.. Soft Reset & Power-On Reset .. Power Down Mode .. Chip Identification .. General Purpose Output (GPO) Pin .. SERIAL PORT.. Serial Port Modes of Operation .. HMCSPI Protocol Decision after Power-On Reset .. Serial Port HMC Mode - Single PLL .. HMC Mode - Serial Port WRITE Operation .. HMC Mode - Serial Port READ Operation.. Serial Port Open Mode .. Open Mode - Serial Port WRITE Operation.. Open Mode - Serial Port READ Operation .. HMCSPI Open Mode READ Operation - 2 Cycles.. Configuration at Start-Up .. VCO Serial Port Interface (SPI) .. VSPI Use of Reg05h.. PLL Register Map.

5 Reg 00h ID Register (Read Only).. Reg 00h Open Mode Read Address/RST Strobe Register (Write Only).. Reg 01h Enables Register .. Reg 02h REFDIV Register .. Reg 03h Frequency Register - Integer Part .. Reg 04h Frequency Register - Fractional Part .. Reg 05h VCO SPI Register .. Reg 06h SD CFG Register .. Reg 07h Lock Detect Register .. Reg 08h Analog EN Register .. Reg 09h Charge Pump Register.. Reg 0Ah VCO AutoCal Configuration Register .. Reg 0Ch Fine Frequency Correction Register .. Reg 0Fh GPO_SPI_RDIV Register .. Reg 10h VCO Tune Register .. Reg 11h SAR Register .. Reg 12h GPO2 Register .. Reg 13h BIST Register .. VCO Subsystem Register Map.

6 54 Table of Contents (Continued)Order On-line at technical application questions: Phone: 978-250-3343 or & OPERATING GUIDEAA - 3 PLLs WITH INTEGRATED VCO - RF APPLICATIONS PRODUCT & OPERATING VCO_Reg 00h Tuning .. VCO_Reg 01h Enables .. VCO_Reg 02h Biases .. PLL Reg05h Values for VCO_Reg 02h Required Config Narrowband ONLY.. VCO_Reg 03h Config .. PLL Reg05h Values for VCO_Reg 03h Required Config Narrowband ONLY.. VCO_Reg 04h, VCO_Reg 05h, VCO_Reg 06h Wideband Devices Only.. 57 Table of Contents (Continued)Order On-line at technical application questions: Phone: 978-250-3343 or & OPERATING GUIDEAA - 4 PLLs WITH INTEGRATED VCO - RF APPLICATIONS PRODUCT & OPERATING Applicable ProductsThis Operating Guide applies to Hittite s family of PLLs with Integrated VCO products.

7 This family of products is broadly categorized by the type of integrated VCO (Voltage Controlled Oscillator) subsystem, see section Theory of Operation for more details. Narrowband parts contain a VCO subsystem that can be configured to operate in a limited number of configurations (any combination of divide-by-2 and/or fundamental, and/or doubler outputs from one device). Narrowband parts can be further segmented into tri-band parts that contain a VCO subsystem capable of operating in all three modes; fundamental (Fo), doubler (2Fo); and divide-by-2 (Fo/2), and Single band parts that contain a VCO subsystem that is only capable of operating in one of the three modes; fundamental (Fo) or doubler (2Fo) or divide-by-2 (Fo/2).

8 Wideband parts on the other hand contain a VCO subsystem that can be configured to operate with divide by N, where N = 1,2,4,6, ,60,62. Detailed product family segmentation matrix is shown in Table 1. Hittite PLL with Integrated VCO Product Family MatrixClock GeneratorsWidebandNarrowbandTri-bandSing le-bandFo/2 Divide By General DescriptionHittite s family of PLLs with Integrated VCOs offers pin-compatible integrated frequency generation solutions across a wide range of frequency bands. The product family includes a high level of integration requiring only an external loop-filter and an external reference source to build a complete frequency entire family of products shares a common architecture which has been specifically designed to have the best phase noise and spurious performance in the industry.

9 The superior performance as a Local Oscillator minimizes blocker effects, improves receiver sensitivity, and improves transmitter spectral purity. Superior phase noise and low noise floors lead to ultra low jitter which makes this family of PLLs with integrated VCOs ideal for clocking high performance data-converters. The architecture includes integrated Phase Detector (PD) and a delta-sigma modulator capable of operating at up to 100 MHz which offers excellent phase noise and spectral performance and permits wide loop-bandwidths, while delivering high frequency resolution and ultra-low step sizes. This architecture also includes an integrated VCO subsystem, precision controlled charge-pump, low noise reference path divider, and a 19-bit fractional divider with minimum division ratio of addition to high integration and excellent performance, Hittite s family of PLLs with Integrated VCOs offers a number of features including (for details and additional features please see individual product data sheets): Exact Frequency Mode which enables users to generate frequencies with 0 Hz frequency error, with minimal spurious emissions at multiples of the channel spacing.

10 CSP (cycle slip protection) technology that allows faster frequency convergence which enables faster frequency hopping times. Auto-Calibration of the VCO subsystem which ensures single point calibration for optimal operation over the full temperature range of the device. Built-In Self Test (BIST) controlled via the serial port which ensures full test coverage of the digital Order On-line at technical application questions: Phone: 978-250-3343 or & OPERATING GUIDEAA - 5 PLLs WITH INTEGRATED VCO - RF APPLICATIONS PRODUCT & OPERATING Robust digital lock detect that provides faster and more accurate lock detect information compared to conventional Analog lock detect, and offers serial port monitoring of lock detect for unprecedented visibility into device status from the host controller.