Analog Devices Inc. ADN2818ACPZ-RL7

Overview

ADN2818ACPZ-RL7 from Analog Devices is a continuous-rate clock and data recovery (CDR) IC for optical receiver front-ends, supporting 10 Mbps to 2.7 Gbps data rates with integrated limiting amplifier, loss-of-lock detection, and I²C programmability. It delivers jitter generation as low as 0.001 UI_rms (OC-48), operates on a single 3.3 V supply, and consumes 600 mW typical power.

For engineers reviewing the ADN2818ACPZ-RL7 datasheet, ADN2818ACPZ-RL7 pinout, ADN2818ACPZ-RL7 application, or ADN2818ACPZ-RL7 equivalent, this page provides verified technical context, real-world timing roles in SONET/Fibre Channel systems, confirmed differential CML output specifications, and validated alternative options for high-speed serial link design.

Technical Context

The ADN2818ACPZ-RL7 implements a proprietary dual-loop CDR architecture-combining a frequency-locked loop (FLL) for rapid acquisition and a phase-locked loop (PLL) for low-jitter tracking-enabling automatic lock without external reference clock. Its quantizer accepts differential CML inputs with 200 mV_p-p sensitivity and supports both single-ended and ac-coupled configurations.

It integrates BER monitoring via analog voltage output (VBER) or digital pseudo-error counting, offers sample-phase adjustment over ±0.5 UI in 6° steps, and supports double-data-rate (DDR) mode with defined setup/hold timing. All jitter transfer, tolerance, and generation specs meet and exceed ITU-T G.823/G.825 requirements across OC-1 through OC-48 rates.

Key Specifications

Pinout & Package

ADN2818ACPZ-RL7 is housed in a 5 mm × 5 mm, 32-lead lead frame chip scale package (LFCSP) with exposed thermal paddle that must be soldered to VEE for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar clock and data recovery applications.

Compared with MAX3795ETJ+ and LMH0384SQ/NOPB, the ADN2818ACPZ-RL7 uniquely combines reference-free multi-rate operation, SONET-compliant jitter performance, and on-chip BER monitoring-making it optimal for adaptive optical receiver designs requiring field-programmable link health telemetry.

Availability

ADN2818ACPZ-RL7 is available at Aetrix Electronics and suitable for SONET OC-48 receivers, Fibre Channel 2× transceivers, and GbE media converters requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for ADN2818ACPZ-RL7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and industrial markets since 1965.

The ADN2818ACPZ-RL7 belongs to Analog Devices' high-speed clock and data recovery product line, engineered specifically for optical receiver subsystems in telecom, datacom, and test equipment where autonomous, low-jitter timing recovery is critical.

FAQ

What data rates does the ADN2818ACPZ-RL7 support?

The ADN2818ACPZ-RL7 supports continuous data rates from 10 Mbps to 2.7 Gbps-including SONET OC-1 (51.84 Mbps), OC-3 (155.52 Mbps), OC-12 (622.08 Mbps), and OC-48 (2.488 Gbps)-without external programming or reference clock. Its dual-loop architecture enables automatic lock across this full range, verified per ITU-T jitter specifications.

Does the ADN2818ACPZ-RL7 require an external reference clock?

No, the ADN2818ACPZ-RL7 does not require an external reference clock for normal operation. Its proprietary dual-loop architecture (FLL + PLL) enables autonomous frequency acquisition and lock. An optional reference clock (10–200 MHz) can be applied to REFCLKP/REFCLKN only if deterministic lock behavior or provisioning to a specific rate is needed.

How is BER monitoring implemented in the ADN2818ACPZ-RL7?

The ADN2818ACPZ-RL7 provides two BERMON modes: analog voltage output on VBER (0.1–0.9 V proportional to log(BER)) and digital pseudo-error counting via I²C registers (NUMBITS up to 2³⁹). Both modes operate without data interruption; accuracy is ±1 decade for BER 1×10⁻³ to 1×10⁻¹² under specified jitter conditions.

What is the thermal design requirement for the ADN2818ACPZ-RL7 package?

The ADN2818ACPZ-RL7 uses a 5 mm × 5 mm, 32-lead LFCSP with exposed thermal paddle that must be soldered to VEE. With proper 4-layer PCB layout (exposed pad connected to solid VEE plane), its junction-to-ambient thermal resistance is 28°C/W. At 600 mW dissipation, this yields ~16.8°C junction-to-ambient rise above ambient-well within the −40°C to +85°C operating range.

Can the ADN2818ACPZ-RL7 be used in DDR mode?

Yes, the ADN2818ACPZ-RL7 supports double data rate (DDR) mode via I²C configuration. In DDR mode, DATAOUTP/DATAOUTN deliver two bits per clock cycle, with defined setup (tDDRS) and hold (tDDRH) times of 140–200 ps and 200–260 ps respectively at OC-48 rates-enabling efficient interface to high-speed FPGAs or ASICs.