Analog Devices Inc. ADN2804ACPZ-500RL7

Overview

ADN2804ACPZ-500RL7 from Analog Devices is a 622 Mbps clock and data recovery (CDR) IC with integrated limiting amplifier, designed for SONET OC-12 receiver front-ends. It performs quantization, loss-of-signal detection, clock recovery, and data retiming without external reference clock. Key confirmed specs: 3.3 mV typical quantizer sensitivity, ±95 mV adjustable slice level, 0.003 UI rms jitter generation, 32-lead 5 mm × 5 mm LFCSP package, and −40°C to +85°C operating range.

For engineers reviewing the ADN2804ACPZ-500RL7 datasheet, ADN2804ACPZ-500RL7 pinout, ADN2804ACPZ-500RL7 application, or ADN2804ACPZ-500RL7 equivalent, this page delivers verified technical context, real-world timing roles in fiber optic receivers, I²C-configurable LOS/LOL behavior, and precise SONET-compliant jitter performance metrics - all validated against Rev. D datasheet and Analog Devices' official specifications.

Technical Context

The ADN2804ACPZ-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 achieves 3.3 mV p-p sensitivity with 290 µV rms input noise and supports ac- or dc-coupled CML inputs at 100 Ω differential impedance.

Jitter transfer bandwidth is 75–130 kHz with ≤0.03 dB peaking; jitter tolerance meets OC-12 mask down to 1.0 UI p-p at 250 kHz; jitter generation is 0.003 UI rms (12 kHz–5 MHz). The device uses internal loop filters (CF1/CF2), supports optional REFCLK lock (10–160 MHz), and provides LVDS outputs (CLKOUTP/N, DATAOUTP/N) with 250–400 mV differential swing.

Key Specifications

Pinout & Package

ADN2804ACPZ-500RL7 is housed in a 5 mm × 5 mm, 32-lead leadframe chip-scale package (LFCSP) with exposed thermal pad soldered to ground. The package supports high-density PCB layouts and efficient heat dissipation for sustained CDR operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX3675ETA+T and LMH0384SQ/NOPB, the ADN2804ACPZ-500RL7 uniquely delivers reference-free 622 Mbps lock with SONET-certified jitter performance, programmable LOS, and compact LFCSP packaging - making it the sole choice for BPON ONT and OC-12 regenerator designs requiring guaranteed compliance and minimal external components.

Availability

ADN2804ACPZ-500RL7 is available at Aetrix Electronics and suitable for BPON ONT, SONET OC-12 regenerators, and WDM transponder line cards requiring stable component supply, long-term lifecycle support, and traceable sourcing for telecom infrastructure programs.

Supply support for ADN2804ACPZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide.

The ADN2804ACPZ-500RL7 belongs to Analog Devices' optical communications CDR product line, engineered specifically for SONET/SDH and PON receiver applications demanding ultra-low jitter, autonomous lock, and integrated signal conditioning.

FAQ

What is the primary function of the ADN2804ACPZ-500RL7 in a fiber optic receiver?

The ADN2804ACPZ-500RL7 serves as a complete clock and data recovery IC with integrated limiting amplifier, performing quantization, loss-of-signal detection, clock recovery, and data retiming for 622 Mbps NRZ signals. It enables bit-error-free reception in BPON ONT and SONET OC-12 systems without requiring an external reference clock - a core capability confirmed in the Rev. D datasheet's General Description and Functional Block Diagram.

Does the ADN2804ACPZ-500RL7 require an external reference clock to operate at 622 Mbps?

No, the ADN2804ACPZ-500RL7 does not require an external reference clock for 622 Mbps operation. Its patented dual-loop architecture (DLL + PLL) enables autonomous lock to 622 Mbps NRZ data, as explicitly stated in the General Description: "The ADN2804 automatically locks to 622 Mbps data without the need for an external reference clock or programming." An optional REFCLK input (10–160 MHz) is provided but not required.

How is loss-of-signal (LOS) detection configured on the ADN2804ACPZ-500RL7?

LOS detection on the ADN2804ACPZ-500RL7 is configured via the THRADJ pin, which accepts an external resistor to set the trip point between 2.6 mV and 18.4 mV p-p differential input. This range is confirmed in Table 1 (LOSS-OF-SIGNAL DETECT section) and Figure 6 of the Rev. D datasheet. The LOS output is LVTTL-active-high with 400–500 ns response time for dc-coupled inputs.

What are the key jitter performance metrics of the ADN2804ACPZ-500RL7 relevant to SONET OC-12 compliance?

The ADN2804ACPZ-500RL7 meets Telcordia GR-253-CORE requirements: jitter transfer bandwidth 75–130 kHz with ≤0.03 dB peaking; jitter generation 0.003 UI rms (12 kHz–5 MHz); and jitter tolerance ≤1.0 UI p-p at 250 kHz. These values are specified in Tables 2 and 4 of the Rev. D datasheet and form the basis for its use in SONET OC-12 regenerators and BPON ONT receivers.

Can the ADN2804ACPZ-500RL7 be used with ac-coupled inputs, and what impact does that have on performance?

Yes, the ADN2804ACPZ-500RL7 supports both ac- and dc-coupled inputs. For ac-coupled operation, the LOS assert/deassert times are dominated by the RC time constant of the coupling capacitor and 50 Ω input termination (per Note 2 in Table 1), rather than the 400–500 ns typical values quoted for dc-coupled use. Input sensitivity remains 3.3 mV p-p typical, and common-mode level is internally biased to ~2.5 V, as detailed in the Terminology and Applications Information sections.