Analog Devices Inc. ADN2913ACPZ

Overview

ADN2913 from Analog Devices is a continuous-rate clock and data recovery (CDR) IC with integrated limiting amplifier and adaptive equalizer, supporting 6.5 Mbps to 8.5 Gbps serial data rates. It performs quantization, signal-level detection, and jitter-tolerant CDR without external reference clock, meeting SONET/SDH OC-48 and 8GFC requirements in telecom and fiber channel systems.

For engineers reviewing the ADN2913 datasheet, ADN2913 pinout, ADN2913 application, or ADN2913 equivalent, key selection considerations include jitter transfer bandwidth programmability (157–1676 kHz), differential input sensitivity down to 6.3 mV_p-p (limiting mode), I²C-configurable slice/phase/LOS threshold, PRBS generation/detection, and 4 mm × 4 mm 24-lead LFCSP packaging for high-density optical line cards.

Technical Context

The ADN2913 implements an all-digital phase-locked loop (ADPLL) architecture with frequency acquisition and lock detection logic, supporting both lock-to-data (LTD) and optional lock-to-reference (LTR) modes. Its front-end offers three selectable input paths: limiting amplifier, adaptive equalizer, or 0 dB EQ - each with distinct sensitivity and equalization capability across FR-4 trace lengths.

Jitter performance exceeds SONET/SDH standards: jitter tolerance up to 1528 UI_p-p at 600 Hz (OC-48), jitter generation as low as 0.0025 UI_rms (12 kHz–20 MHz), and programmable jitter transfer bandwidth via TRANBW[2:0] register bits for OTN (G.8251), OC-48, OC-12, and OC-3 compliance.

Key Specifications

Pinout & Package

ADN2913 is housed in a 4 mm × 4 mm, 24-lead lead frame chip scale package (LFCSP) with exposed thermal pad connected to VEE. The package supports high-speed CML I/O and mixed-signal power domains (1.2 V core, 1.8–3.3 V DCO, 3.3 V digital).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX3795 and LMK04828, the ADN2913 uniquely combines wide-rate CDR, adaptive equalization, and full I²C configurability in a single 4 mm × 4 mm package - enabling one device to replace discrete amplifier+CDR+equalizer chains in multi-standard optical receivers.

Availability

ADN2913 is available at Aetrix Electronics and suitable for SONET/SDH line cards, Fibre Channel SAN switches, CPRI fronthaul units, and any-rate optical repeaters requiring stable component supply and long-term lifecycle support.

Supply support for ADN2913 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The ADN2913 belongs to Analog Devices' high-speed communication IC portfolio, designed specifically for optical transport, storage networking, and wireless fronthaul applications demanding jitter-compliant, rate-transparent CDR with integrated signal conditioning.

FAQ

What data rates does the ADN2913 support, and how is rate detection handled?

The ADN2913 supports continuous data rates from 6.5 Mbps to 8.5 Gbps. It automatically locks to incoming data without external reference clock or manual programming via its all-digital PLL and frequency acquisition circuitry. Rate readback is available through I²C registers FREQMEAS0–FREQMEAS2 with ±100 ppm fine accuracy, enabling real-time monitoring in dynamic link environments.

Does the ADN2913 require an external reference clock to operate?

No, the ADN2913 operates in lock-to-data (LTD) mode by default and does not require an external reference clock. An optional lock-to-reference (LTR) mode is supported via REFCLKP/REFCLKN inputs (11.05–176.8 MHz), but this is not necessary for basic CDR functionality. The device achieves full jitter compliance (SONET/SDH, OTN, FC) in LTD mode.

How does the ADN2913 handle degraded input signals, and what equalization options are available?

The ADN2913 provides three selectable input paths: limiting amplifier (6.3 mV_p-p sensitivity), adaptive equalizer (115 mV_p-p for 15-inch FR-4), or 0 dB EQ. The adaptive EQ compensates for frequency-dependent loss in PCB traces or fiber, while the limiting amp delivers maximum sensitivity for clean, high-amplitude signals - all configurable via LA_EQ register.

What is the purpose of the I2C interface on the ADN2913, and which functions can be controlled through it?

The I²C interface (SCK/SDA/I2C_ADDR) enables full configuration and monitoring of the ADN2913. Key functions include setting jitter transfer bandwidth (TRANBW[2:0]), adjusting slice level and sample phase, configuring LOS threshold (5–128 mV_p-p), enabling PRBS generation/detection, reading back data rate and lock status, and controlling output polarity/squelch - all without requiring additional microcontroller firmware.

What package type and thermal characteristics does the ADN2913 have?

The ADN2913 uses a 4 mm × 4 mm, 24-lead LFCSP with exposed thermal pad (connected to VEE). Its thermal resistance is θ_JA = 45°C/W (junction-to-ambient) and θ_JC = 11°C/W (junction-to-case), enabling efficient heat dissipation in compact optical modules. Operating ambient temperature range is −40°C to +85°C, with max junction temperature rated at 125°C.