Clock & Timer Development Tools LTC6994-2 Demo Board 100ms, Output Rising Edge Delayed from Trigger Rising Edge

Delay Lines/Timing Elements Broadband Analog Time Delay to 24 GHz

EVAL KIT, VOLTAGE CONTROLLED OSCILLATOR;

Real Time Clock

Real Time Clock

The AD9510 provides a multi-output clock distribution functionalong with an on-chip phase-locked loop (PLL) core. The designemphasizes low jitter and phase noise to maximize data converterperformance. Other applications with demanding phase noiseand jitter requirements also benefit from this device.The PLL section consists of a programmable reference divider(R); a low noise, phase frequency detector (PFD); a precisioncharge pump (CP); and a programmable feedback divider (N).By connecting an external voltage-controlled crystal oscillator(VCXO) or voltage-controlled oscillator (VCO) to the CLK2and CLK2B pins, frequencies of up to 1.6 GHz can be synchronizedto the input reference.There are eight independent clock outputs. Four outputs are lowvoltage positive emitter-coupled logic (LVPECL) at 1.2 GHz,and four are selectable as either LVDS (800 MHz) or CMOS(250 MHz) levels.Each output has a programmable divider that can be bypassedor set to divide by any integer up to 32. The phase of one clockoutput relative to another clock output can be varied by meansof a divider phase select function that serves as a coarse timingadjustment. Two of the LVDS/CMOS outputs feature programmabledelay elements with full-scale ranges up to 8 ns of delay.This fine tuning delay block has 5-bit resolution, giving 25possible delays from which to choose for each full-scale setting(Register 0x36 and Register 0x3A = 00000b to 11000b).The AD9510 is ideally suited for data converter clockingapplications where maximum converter performance isachieved by encode signals with subpicosecond jitter.The AD9510 is available in a 64-lead LFCSP and can be operatedfrom a single 3.3 V supply. An external VCO, which requires anextended voltage range, can be accommodated by connectingthe charge pump supply (VCP) to 5.5 V. The temperature rangeis −40°C to +85°C.Applications Low jitter, low phase noise clock distribution Clocking high speed ADCs, DACs, DDSs, DDCs, DUCs, and mixed-signal front ends (MxFEs) High performance wireless transceivers High performance instrumentation Broadband infrastructure

The ADN2812 provides the receiver functions of quantization, signal level detect, and clock and data recovery for continuous data rates from 12.3 Mb/s to 2.7 Gb/s. The ADN2812 automatically locks to all data rates without the need for an external reference clock or programming. All SONET jitter requirements are met, including jitter transfer, jitter generation, and jitter tolerance. All specifications are quoted for ?40?C to +85?C ambient temperature, unless otherwise noted. This device, together with a PIN diode and a TIA preamplifier, can implement a highly integrated, low cost, low power fiber optic receiver. The receiver front end, loss of signal (LOS) detector circuit indicates when the input signal level has fallen below a user-adjustable threshold. The LOS detect circuit has hysteresis to prevent chatter at the output. The ADN2812 is available in a compact 5 mm ? 5 mm 32-lead lead frame chip scale package (LFCSP).ApplicationsSONET OC-1/OC-3/OC-12/OC-48 and all associated FEC rates Fibre Channel, 2? Fibre Channel, GbE, HDTV WDM transponders Regenerators/repeaters Test equipment Broadband cross-connects and routers

The LTC6905 precision, programmable silicon oscillator is easy to use and occupies very little board space. It requires only a single resistor to set the output frequency from 17MHz to 170MHz with a typical frequency error of 0.5% or less.The LTC6905 operates with a single 2.7V to 5.5V power supply and provides a rail-to-rail, 50% duty cycle square wave output. The CMOS output driver ensures fast rise/fall times and rail-to-rail switching. Operation is simple: A single resistor, RSET, between 10K to 25K is used to set the frequency, and an internal three-state divider (DIV input) allows for division of the master clock by 1, 2 or 4, providing three frequencies for each RSET value.The LTC6905 features a proprietary feedback loop that linearizes the relationship between RSET and frequency, eliminating the need for tables to calculate frequency. The oscillator can be easily programmed using the simple formula outlined below:See first page of Data Sheet for formula?For higher accuracy, fixed frequency versions that includean internal frequency-setting resistor, see the LTC6905-XXX Series datasheet.Applications High Frequency Precision Oscillator High Speed Data Bus Clock Fixed Crystal Oscillator Replacement Ceramic Oscillator Replacement

The LTC6900 is a precision, low power oscillator that is easy to use and occupies very little PC board space. The oscillator frequency is programmed by a single external resistor (RSET). The LTC6900 has been designed for high accuracy operation (?1.5% frequency error) without the need for external trim components. The LTC6900 operates with a single 2.7V to 5.5V power supply and provides a rail-to-rail, 50% duty cycle square wave output. The CMOS output driver ensures fast rise/fall times and rail-to-rail switching. The frequency-setting resistor can vary from 10k? to 2M? to select a master oscillator frequency between 100kHz and 20MHz (5V supply). The three-state DIV input determines whether the master clock is divided by 1, 10 or 100 before driving the output, providing three frequency ranges spanning 1kHz to 20MHz (5V supply). The LTC6900 features a proprietary feedback loop that linearizes the relationship between RSET and frequency, eliminating the need for tables to calculate frequency. TApplications Portable and Battery-Powered Equipment PDAs Cell Phones Low Cost Precision Oscillator Charge Pump Driver Switching Power Supply Clock Reference Clocking Switched Capacitor Filters Fixed Crystal Oscillator Replacement Ceramic Oscillator Replacement

Demonstration Circuit 2611A features the LTC6955, Ultralow Jitter 11 Output Fanout Buffers. By default, the DC2611A is powered from a single 3.3V supply. An option is provided to power to the DC2611A from dual supplies, allowing for the LTC6955’s output supply pins to connect to an LTC Silent Switcher® and the LTC6955 input supply pin to connect to a low noise LDO. The differential inputs and six of the differential outputs are populated with 0.5" spaced SMA connectors. These outputs are AC-coupled with 50Ω transmission lines making them suitable to drive 50Ω impedance instruments. All registered trademarks and trademarks are the property of their respective owners. The remaining four differential outputs are terminated with 100Ω. A calibration path is provided to aid in accurate LTC6955 propagation delay measurements. The calibration path can be also reconfigured as a DC path, which allows for a convenient method of locking the LTC6955 outputs to an external PLL/VCO.