Analog Devices Inc. ADN2814ACPZ-RL7

Overview

ADN2814ACPZ-RL7 from Analog Devices is a continuous-rate clock and data recovery (CDR) IC with integrated limiting amplifier, supporting 10 Mb/s to 675 Mb/s serial data input, delivering LVDS clock/data outputs, and meeting all SONET jitter transfer/generation/tolerance requirements. It operates from a single 3.3 V supply, consumes 435 mW typical, and features loss-of-signal (LOS) and loss-of-lock (LOL) indicators for fiber-optic receiver front-ends.

For engineers reviewing the ADN2814ACPZ-RL7 datasheet, ADN2814ACPZ-RL7 pinout, ADN2814ACPZ-RL7 application, or ADN2814ACPZ-RL7 equivalent, key selection criteria include its jitter performance at OC-12/OC-3 rates, adjustable slice level (±95 mV), LOS detect range (2.3–19 mV), I²C-configurable registers, and 5 mm × 5 mm 32-lead LFCSP package with exposed thermal pad.

Technical Context

The ADN2814ACPZ-RL7 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 achieves 3.3 mV p-p differential sensitivity and supports dc- or ac-coupled CML inputs.

Jitter transfer bandwidth is 75–130 kHz (OC-12) and 26–42 kHz (OC-3); jitter generation is ≤0.003 UI rms (OC-12, 12 kHz–5 MHz); jitter tolerance meets GR-253-CORE mask up to 250 kHz. The device requires no external reference clock but supports optional REFCLK lock (10–160 MHz).

Key Specifications

Pinout & Package

The ADN2814ACPZ-RL7 is housed in a 5 mm × 5 mm, 32-lead lead-frame chip-scale package (LFCSP) with an exposed thermal pad that must be soldered to ground 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 MAX3675ETA+ and LMH0384SQ/NOPB, the ADN2814ACPZ-RL7 uniquely balances SONET-compliant jitter performance, diagnostic flexibility via I²C, and adaptive thresholding for optical receiver front-ends-making it the preferred choice for OC-1/-3/-12 regenerators and WDM transponders requiring field-serviceable signal integrity monitoring.

Availability

ADN2814ACPZ-RL7 is available at Aetrix Electronics and suitable for SONET regenerators, WDM transponder receivers, ESCON interconnects, and test equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for ADN2814ACPZ-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 ADN2814ACPZ-RL7 belongs to Analog Devices' clock and data recovery product line, engineered specifically for optical transport systems requiring SONET/SDH-compliant jitter performance, autonomous rate acquisition, and integrated diagnostics in compact form factors.

FAQ

What data rates does the ADN2814ACPZ-RL7 support?

The ADN2814ACPZ-RL7 supports continuous data rates from 10 Mb/s to 675 Mb/s, covering SONET OC-1 (51.84 Mb/s), OC-3 (155.52 Mb/s), OC-12 (622.08 Mb/s), ESCON, Fast Ethernet, and associated FEC rates. It automatically locks to any rate in this range without external reference clock or firmware programming, making it ideal for multi-rate optical receiver applications where rate agility is essential.

Does the ADN2814ACPZ-RL7 require an external reference clock?

No, the ADN2814ACPZ-RL7 does not require an external reference clock. Its patented DLL+PLL architecture enables autonomous frequency acquisition and lock across the full 10–675 Mb/s range. However, an optional differential REFCLK input (10–160 MHz) is provided for applications requiring deterministic lock timing or synchronization to a system master clock-this mode is enabled via I²C register CTRLA[0].

How is loss-of-signal (LOS) detection configured on the ADN2814ACPZ-RL7?

LOS detection on the ADN2814ACPZ-RL7 is configured using an external resistor connected to the THRADJ pin. This sets the LOS trip point between 2.3 mV and 19 mV p-p differential input amplitude, depending on resistor value. The LOS output (Pin 22) is an active-high LVTTL signal with 500 ns assert time (dc-coupled). Hysteresis prevents chatter, and the threshold is independent of slice level adjustment.

What output interface standards does the ADN2814ACPZ-RL7 support?

The ADN2814ACPZ-RL7 provides LVDS-compatible differential outputs for both recovered clock (CLKOUTP/N) and retimed data (DATAOUTP/N), with 250–400 mV differential swing, 100 Ω output impedance, and 115–220 ps rise/fall times. It also includes LVTTL-level digital outputs (LOS, LOL, SQUELCH) and I²C (SCK/SDA) for configuration and monitoring-all operating from a single 3.3 V supply.

Can the ADN2814ACPZ-RL7 be used in DC-coupled input configurations?

Yes, the ADN2814ACPZ-RL7 supports DC-coupled inputs. Its quantizer input common-mode level is specified at 2.3–2.8 V (typical 2.5 V), and the input voltage range is 1.8–2.8 V. DC coupling enables direct connection to post-amplifier stages without AC coupling capacitors, reducing board area and low-frequency drift. LOS assert/deassert times are 500 ns/400 ns typical in DC-coupled mode, versus RC-limited timing in AC-coupled configurations.