Analog Devices Inc. AD9680BCPZ-500

Overview

AD9680BCPZ-500 from Analog Devices is a dual-channel, 14-bit, 500 MSPS analog-to-digital converter with JESD204B Subclass 1 serial output, integrated digital downconverters (DDCs), and programmable input termination. It delivers 68.6 dBFS SNR at 340 MHz input, −153 dBFS/Hz noise density, and supports 2 GHz full-power analog input bandwidth. It is used in DOCSIS 3.0 CMTS upstream receivers for high-fidelity digitization of wideband cable return-path signals.

For engineers reviewing the AD9680BCPZ-500 datasheet, AD9680BCPZ-500 pinout, AD9680BCPZ-500 application, or AD9680BCPZ-500 equivalent, key selection considerations include its 500 MSPS sample rate, dual-channel DDC configuration with NCO and half-band filters, JESD204B lane flexibility (1/2/4 lanes), 1.46–2.06 V_p-p programmable input range, and 9 mm × 9 mm LFCSP package with exposed thermal pad.

Technical Context

The AD9680BCPZ-500 implements two independent pipelined ADC cores with on-chip buffer and sample-and-hold, each feeding a dedicated DDC block comprising a 12-bit numerically controlled oscillator (NCO) and up to four cascaded half-band decimation filters. Its JESD204B Subclass 1 interface supports deterministic latency synchronization via SYSREF± and SYNCINB± pins.

It features programmable fast overrange detection (FD_A/FD_B) with sub-cycle latency, amplitude detect bits for AGC loop implementation, and flexible clock division (÷1/÷2/÷4/÷8) with differential clock input. Input termination impedance is configurable to 400 Ω, 200 Ω, 100 Ω, or 50 Ω differential.

Key Specifications

Pinout & Package

AD9680BCPZ-500 is housed in a 64-lead, 9 mm × 9 mm LFCSP package with exposed thermal pad (EP). The package supports high thermal dissipation required for sustained 500 MSPS operation and provides low-inductance grounding via the EP soldered to PCB ground plane.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, JESD204B ADC applications.

Compared with AD9680BCPZ-500, AD9695BCPZ-1300 offers higher speed but demands more power and external reference management, while ADC12J4000IRGZT sacrifices resolution and integrated processing for raw sample rate-making AD9680BCPZ-500 optimal for balanced wideband receiver designs requiring embedded DDCs and low-system-footprint integration.

Availability

AD9680BCPZ-500 is available at Aetrix Electronics and suitable for DOCSIS 3.0 CMTS upstream receive paths, HFC reverse-path receivers, signals intelligence systems, and ultrawideband satellite ground stations requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for AD9680BCPZ-500 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 AD9680 product line delivers high-speed, high-resolution dual ADCs with integrated digital processing for communications infrastructure, defense, and instrumentation-designed to reduce FPGA resource load and simplify wideband receiver architecture.

FAQ

What is the maximum analog input frequency supported by the AD9680BCPZ-500?

The AD9680BCPZ-500 supports a 2 GHz usable analog input full-power bandwidth, enabling direct sampling of IF signals up to L-band (1–2 GHz) without external bandpass filtering. This specification is verified per the Rev. E datasheet Figure 14 and Table 1, and applies across the full industrial temperature range (−40°C to +85°C) with AVDD1 = 1.25 V, AVDD2 = 2.5 V, and AVDD3 = 3.3 V.

Does the AD9680BCPZ-500 include an internal voltage reference?

Yes, the AD9680BCPZ-500 integrates a precision 1.0 V internal voltage reference with ±0.5% tolerance over temperature, eliminating the need for an external reference component. This is confirmed in the DC Specifications table (Table 1, page 6) and General Description section (page 5) of the Rev. E datasheet, and directly reduces system BOM count and layout complexity for the AD9680BCPZ-500.

What JESD204B lane configurations are supported by the AD9680BCPZ-500?

The AD9680BCPZ-500 supports configurable 1-lane, 2-lane, or 4-lane JESD204B Subclass 1 serial output, with lane rate scaling based on DDC decimation settings and sample rate. At 500 MSPS with default DDC bypass, 4-lane operation yields ~3.125 Gbps per lane-well within the 12.5 Gbps maximum. Configuration is performed via SPI registers per the JESD204B Link Configuration section (pages 73–75) of the Rev. E datasheet.

How does the fast detect (FD_A/FD_B) feature function in the AD9680BCPZ-500?

The FD_A and FD_B outputs of the AD9680BCPZ-500 provide sub-cycle latency digital flags indicating instantaneous overrange conditions on Channels A and B, respectively. These outputs drive external AGC circuitry with <1 µs response time, as detailed in the ADC Overrange and Fast Detect section (pages 45–46) of the Rev. E datasheet. Thresholds are programmable via SPI register 0x024, and the feature operates independently of DDC configuration.

What is the nominal differential input voltage range for the AD9680BCPZ-500?

The AD9680BCPZ-500 has a nominal differential input voltage range of 2.06 V_p-p, adjustable from 1.46 V_p-p to 2.06 V_p-p. This is explicitly stated in the Revision History (page 4) and DC Specifications table (Table 1, page 6) of the Rev. E datasheet under "Differential Input Voltage Range (Programmable)" for the AD9680-500 speed grade, and aligns with standard transformer-coupled RF front-end interfaces.