ADCMP573BCPZ-RL7

Overview

The ADCMP573BCPZ-RL7 is an ultrafast comparator fabricated on Analog Devices' proprietary XFCB3 Silicon Germanium (SiGe) bipolar process. It features reduced swing PECL (RSPECL) output drivers and latch inputs, offering a propagation delay of 150 ps and 80 ps minimum pulse width for 10 Gbps operation with 200 fs rms random jitter. The device operates with a single 3.3 V positive supply or split supplies, supporting input signal ranges from −0.2 V to +3.2 V. It includes 50 Ω on-chip input terminations, resistor-programmable hysteresis, and differential latch control within a 16-lead LFCSP package.

Feature Summary

• Features RSPECL output drivers designed to drive 400 mV into 50 Ω terminated lines compatible with common PECL logic families.
• Includes differential latch control allowing the output to reflect the input state just prior to entering latch mode.
• Offers robust input protection against large overdrive without output phase reversal and provides resistor-programmable hysteresis.
• Integrates 50 Ω on-chip termination resistors at both inputs with optional capability for high impedance inputs.

Applications

• Clock and data signal restoration and level shifting
• Automatic test equipment (ATE)
• High speed instrumentation
• Medical imaging and diagnostics

Procurement Notes

Verify the specific ordering suffix RL7 corresponds to tape and reel packaging when sourcing. Confirm that the RSPECL output configuration matches system requirements, as the ADCMP572 variant utilizes CML outputs. Ensure the design accommodates the extended industrial temperature range of −40°C to +125°C and proper bypassing for the separate VCCI and VCCO supply pins.

Selection Notes

Select this component when RSPECL compatibility is required rather than standard CML. Consider the 150 ps propagation delay and low dispersion for timing-critical applications. Evaluate the need for the integrated latch feature versus continuous comparison mode. Verify power supply flexibility, as the device supports both single-supply and split-supply configurations for varied input/output voltage levels.

Part Context

This part belongs to the ADCMP572/ADCMP573 family of ultrafast comparators. While the ADCMP572 provides CML outputs, the ADCMP573 specifically offers reduced swing PECL (RSPECL) outputs. Both share the same SiGe process, propagation delay characteristics, and latch functionality but differ in output driver compatibility and termination requirements.

Replacement Considerations

The ADCMP572BCPZ-RL7 serves as a functional substitute if CML output compatibility is acceptable instead of RSPECL. Other variants such as ADCMP573BCPZ-R2 offer identical electrical performance with different packaging options.

FAQ

How is the latch feature disabled on the ADCMP573?

To disable the latch on the ADCMP573, connect the LE pin to VCCO with an external 500 Ω resistor and leave the LE pin disconnected.

What is the recommended termination for the RSPECL outputs?

The RSPECL outputs should be terminated to VCCO − 2 V using a 50 Ω transmission line.