Analog Devices Inc. AD9862BSTZRL

Overview

AD9862BSTZRL from Analog Devices is a 12-bit ADC / 14-bit DAC mixed-signal front-end (MxFE™) processor for broadband communications, featuring dual receive and transmit paths, 64 MSPS ADC sampling, 128 MSPS DAC update rate, and integrated programmable gain amplifiers, Hilbert filters, and delay-locked loop clock generation. It serves as the core signal conditioning and conversion engine in cable modems and VDSL line cards.

For engineers reviewing the AD9862BSTZRL datasheet, AD9862BSTZRL pinout, AD9862BSTZRL application, or AD9862BSTZRL equivalent, key selection considerations include its 12/14-bit dual-converter resolution, 128-lead LQFP package with defined analog/digital ground separation, real/I/Q baseband processing capability, and support for 2×/4× interpolation and decimation in full-duplex operation.

Technical Context

The AD9862BSTZRL implements a fully integrated dual-channel transceiver architecture: each receive path includes a 12-bit, 64 MSPS ADC with input buffer, RxPGA (20 dB gain range), decimation filter, and bypassable digital Hilbert filter; each transmit path integrates a 14-bit, 128 MSPS current-output DAC, TxPGA (20 dB range), interpolation filter, Hilbert filter, and digitally tunable quadrature mixer.

Its timing subsystem uses a programmable delay-locked loop (DLL) to generate internal clocks from a single crystal or external reference, providing two programmable output clocks (CLKOUT1/CLKOUT2), while auxiliary resources include four 10-bit auxiliary ADC inputs, three 8-bit auxiliary DAC outputs, and a programmable sigma-delta output - all controlled via a 16 MHz SPI interface.

Key Specifications

Pinout & Package

The AD9862BSTZRL is housed in a 128-lead LQFP (ST-128B) package with dedicated analog/digital power and ground pins, differential I/O pairs, and strict partitioning to minimize noise coupling between Rx/Tx sections.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar mixed-signal front-end applications.

Compared with AD9860BSTZ, AD9862BSTZRL delivers 1.3 dB higher SNR and 10 dB better narrowband SFDR at 20 mA output, justifying its use in premium cable/VDSL systems; versus AFE7225IRGCT, it offers mature parallel interface support and proven deployment in legacy broadband infrastructure but lacks high-speed serial connectivity.

Availability

AD9862BSTZRL is available at Aetrix Electronics and suitable for cable modems, VDSL line cards, and fixed wireless access equipment requiring stable component supply, long-term industrial temperature support (–40°C to +70°C), and qualified production lots traceable to Analog Devices wafer fabrication.

Supply support for AD9862BSTZRL 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 AD9862BSTZRL belongs to the MxFE™ (Mixed-Signal Front-End) product line, engineered specifically for broadband communications infrastructure requiring tightly integrated, low-jitter, dual-path ADC/DAC functionality with programmable digital signal conditioning.

FAQ

What is the maximum sampling rate supported by the AD9862BSTZRL ADC?

The AD9862BSTZRL supports a maximum ADC sampling rate of 64 MSPS, as confirmed in the "10-/12-BIT ADC CHARACTERISTICS" table under "Maximum Conversion Rate". This rate applies to both receive channels simultaneously and is specified across the full industrial temperature range (–40°C to +70°C) with typical performance maintained at 25°C. The ADC latency is 7 clock cycles when all digital processing blocks are disabled.

Does the AD9862BSTZRL support I/Q signal processing in both transmit and receive paths?

Yes, the AD9862BSTZRL supports full I/Q processing in both directions: the receive path includes a bypassable digital Hilbert filter enabling I/Q demodulation, and the transmit path integrates a digitally tunable quadrature mixer with Hilbert filtering for complex up-conversion. These features are explicitly documented in the General Description and Functional Block Diagram, allowing implementation of image-reject architectures with external modulators or fully digital I/Q generation.

What package type and pin count does the AD9862BSTZRL use?

The AD9862BSTZRL uses a 128-lead Low Profile Plastic Quad Flatpack (LQFP), designated ST-128B in the Ordering Guide. This package features separate analog and digital power/ground pins, differential I/O placements, and thermal resistance (θ_JA) of 29°C/W - critical for thermal management in high-density broadband line cards where the AD9862BSTZRL operates continuously at full performance.

How is clock generation handled on the AD9862BSTZRL?

The AD9862BSTZRL integrates a programmable delay-locked loop (DLL) clock multiplier that accepts a single external crystal (via OSC1/OSC2) or clock input to generate all internal timing signals and two programmable output clocks (CLKOUT1 and CLKOUT2). The DLL supports multiplication factors of 1×, 2×, or 4×, and CLKOUT1 rate is controlled by the CLKSEL pin - eliminating need for external clock synthesizers in broadband modem designs using the AD9862BSTZRL.

What auxiliary analog functions are integrated into the AD9862BSTZRL?

The AD9862BSTZRL integrates four 10-bit auxiliary ADC inputs (AUX_ADC_A1/A2/B1/B2), three 8-bit auxiliary DAC outputs (AUX_DAC_A/B/C), and a programmable sigma-delta output (SIGDELT). These are documented in the Features section and Pin Function Descriptions, enabling on-chip monitoring of temperature, voltage rails, or bias points, and closed-loop calibration without adding external converters - reducing system cost and board area in AD9862BSTZRL-based designs.