Analog Devices Inc. ADN2813ACPZ-500RL7

Overview

ADN2813ACPZ-500RL7 from Analog Devices is a continuous-rate clock and data recovery (CDR) IC with integrated limiting amplifier, supporting 10 Mb/s to 1.25 Gb/s NRZ data streams. It performs quantization, loss-of-signal detection, and jitter-compliant clock/data retiming without external reference clock. Its 3.3 mV typical input sensitivity, ±95 mV adjustable slice level, and SONET-compliant jitter performance make it suitable for fiber-optic receiver front-ends in OC-12 and GbE systems.

For engineers reviewing the ADN2813ACPZ-500RL7 datasheet, ADN2813ACPZ-500RL7 pinout, ADN2813ACPZ-500RL7 application, or ADN2813ACPZ-500RL7 equivalent, key selection considerations include its 32-lead 5 mm × 5 mm LFCSP package, LVDS output compliance (240–400 mV differential swing), I²C-configurable LOS/LOL thresholds, and autonomous lock acquisition across 10 Mb/s–1.25 Gb/s without programming.

Technical Context

The ADN2813ACPZ-500RL7 implements a patented dual-loop architecture combining a delay-locked loop (DLL) for high-frequency jitter tracking and a phase-locked loop (PLL) with VCO for low-frequency jitter accommodation. Its quantizer delivers 3.3 mV p-p sensitivity and supports dc- or ac-coupled CML inputs with 100 Ω differential impedance and 0.65 pF input capacitance.

Jitter transfer bandwidth is 75–130 kHz (OC-12) and 26–42 kHz (OC-3), with jitter generation as low as 0.001 UI rms (OC-12, 12 kHz–5 MHz). The device meets Telcordia GR-253-CORE jitter tolerance masks for SONET OC-1/-3/-12 and IEEE 802.3 GbE, including 1.0 UI p-p tolerance at 250 kHz.

Key Specifications

Pinout & Package

ADN2813ACPZ-500RL7 is housed in a Pb-free 32-lead LFCSP (5 mm × 5 mm) with exposed thermal pad requiring connection to ground for thermal management and EMI control.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX3675ETM+ and LMH0384SQ/NOPB, ADN2813ACPZ-500RL7 uniquely balances wide-rate autonomy (10 Mb/s–1.25 Gb/s), SONET-grade jitter compliance, and compact 5 mm × 5 mm LFCSP packaging-making it optimal for multi-standard telecom and datacom modules where footprint, power, and interoperability are constrained.

Availability

ADN2813ACPZ-500RL7 is available at Aetrix Electronics and suitable for SONET regenerators, Fibre Channel receivers, and GbE media converters requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for production ramp.

Supply support for ADN2813ACPZ-500RL7 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 ADN2813ACPZ-500RL7 belongs to Analog Devices' clock and data recovery product line, engineered specifically for telecom and datacom infrastructure requiring jitter-compliant, reference-free signal regeneration across multiple legacy and modern serial protocols.

FAQ

What data rates does the ADN2813ACPZ-500RL7 support without external configuration?

The ADN2813ACPZ-500RL7 automatically locks to any continuous NRZ data rate from 10 Mb/s to 1.25 Gb/s without external reference clock or register programming. Its patented dual-loop architecture enables seamless acquisition across SONET OC-1 (51.84 Mb/s), OC-3 (155.52 Mb/s), OC-12 (622.08 Mb/s), and Gigabit Ethernet (1.25 Gb/s), with acquisition times ranging from 200 µs (OC-12) to 40 ms (10 Mb/s).

How does the ADN2813ACPZ-500RL7 achieve SONET-compliant jitter performance?

The ADN2813ACPZ-500RL7 meets Telcordia GR-253-CORE jitter specifications through its dual-loop architecture: a delay-locked loop handles high-frequency jitter (minimizing peaking to <0.03 dB), while a phase-locked loop manages low-frequency components. It delivers jitter generation <0.003 UI rms (OC-12), jitter transfer bandwidth of 75–130 kHz, and jitter tolerance up to 100 UI p-p at 30 Hz-exceeding SONET OC-12 requirements.

Can the ADN2813ACPZ-500RL7 be used with ac-coupled inputs?

Yes, the ADN2813ACPZ-500RL7 supports both ac- and dc-coupled CML inputs. For ac-coupled operation, the internal common-mode bias (~2.5 V) establishes the quantizer operating point. Input impedance is 100 Ω differential, and input capacitance is 0.65 pF. LOS response time under ac coupling is dominated by the external RC time constant-not the 500 ns/400 ns dc-coupled spec-but remains functional across standard coupling networks.

What is the function of the THRADJ pin on the ADN2813ACPZ-500RL7?

The THRADJ pin on the ADN2813ACPZ-500RL7 sets the loss-of-signal (LOS) detection threshold by connecting an external resistor to ground. With R_TH = 0 Ω, LOS triggers at 14–19 mV p-p; with R_TH = 100 kΩ, the range shifts to 2.3–4.7 mV p-p. This programmability allows adaptation to varying receiver front-end gains and optical link budgets without redesigning the signal path.

Does the ADN2813ACPZ-500RL7 support I²C configuration during live data operation?

Yes, the ADN2813ACPZ-500RL7 supports full I²C read/write access-including slice level adjustment, squelch mode enable, output boost control, and coarse data rate readback-while continuously recovering clock and data. The I²C interface operates at up to 400 kHz and does not interrupt CDR functionality, enabling real-time calibration and diagnostics in deployed systems.