Ultrafast, SiGe, Open-Collector HVDS Clock/Data Buffer

The ADCLK914 is an ultrafast clock/data buffer fabricated on the Analog Devices, Inc., proprietary, complementary bipolar (XFCB-3) silicon-germanium (SiGe) process. The ADCLK914 features high voltage differential signaling (HVDS) outputs suitable for driving the latest Analog Devices high speed digitalto-analog converters (DACs). The ADCLK914 has a single, differential open-collector output.

The ADCLK914 buffer operates up to 7.5 GHz with a 160 ps propagation delay and adds only 110 fs random jitter (RJ). The input has a center tapped, 100 Ω, on-chip termination resistor and accepts LVPECL, CML, CMOS, LVTTL, or LVDS (ac-coupled only). A VREF pin is available for biasing ac-coupled inputs.

The HVDS output stage is designed to directly drive 1.9 V each side into 50 Ω terminated to VCC for a total differential output swing of 3.8 V.

The ADCLK914 is available in a 16-lead LFCSP. It is specified for operation over the extended industrial temperature range of −40°C to +125°C.

Applications

* Clock and data signal restoration

* High speed converter clocking

* Broadband communications

* Cellular infrastructure

* High speed line receivers

* ATE and high performance instrumentation

* Level shifting

* Threshold detection

* 7.5 GHz operating frequency

* 160 ps propagation delay

* 100 ps output rise/fall

* 110 fs random jitter

* On-chip input terminations

* Extended industrial temperature range: −40°C to +125°C

* 3.3 V power supply (VCC − VEE)