The ADCMP580/ADCMP581/ADCMP582 are ultrafast voltagecomparators fabricated on the Analog Devices, Inc. proprietaryXFCB3 Silicon Germanium (SiGe) bipolar process. TheADCMP580 features CML output drivers, the ADCMP581features reduced swing ECL (negative ECL) output drivers, andthe ADCMP582 features reduced swing PECL (positive ECL)output drivers.

All three comparators offer 180 ps propagation delay and 100 psminimum pulse width for 10 Gbps operation with 200 fs randomjitter (RJ). Overdrive and slew rate dispersion are typically lessthan 15 ps.

The ±5 V power supplies enable a wide −2 V to +3 V inputrange with logic levels referenced to the CML/NECL/PECLoutputs. The inputs have 50 Ω on-chip termination resistorswith the optional capability to be left open (on an individualpin basis) for applications requiring high impedance input.

The CML output stage is designed to directly drive 400 mV into50 Ω transmission lines terminated to ground. The NECL outputstages are designed to directly drive 400 mV into 50 Ω terminatedto −2 V. The PECL output stages are designed to directly drive400 mV into 50 Ω terminated to V_CCO − 2 V. High speed latchand programmable hysteresis are also provided. The differentiallatch input controls are also 50 Ω terminated to an independentVTT pin to interface to either CML or ECL or to PECL logic.

The ADCMP580/ADCMP581/ADCMP582 are available in a16-lead LFCSP.

Applications

• Automatic test equipment (ATE)
• High speed instrumentation
• Pulse spectroscopy
• Medical imaging and diagnostics
• High speed line receivers
• Threshold detection
• Peak and zero-crossing detectors
• High speed trigger circuitry
• Clock and data signal restoration

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.