Analog Devices Inc. AD9860BSTZRL

Overview

AD9860BSTZRL from Analog Devices is a mixed-signal front-end (MxFE™) IC optimized for broadband communications, integrating dual 10-bit 64 MSPS ADCs and dual 12-bit 128 MSPS DACs in a single 128-lead LQFP package. It supports real or I/Q baseband/low-IF receive paths with RxPGA (20 dB gain range), digital Hilbert/decimation filters, and transmit paths with TxPGA, interpolation, and digitally tunable up-converters - deployed in cable modems and fixed wireless systems.

For engineers reviewing the AD9860BSTZRL datasheet, AD9860BSTZRL pinout, AD9860BSTZRL application, or AD9860BSTZRL equivalent, key selection criteria include its dual-channel 10/12-bit converter resolution, 64/128 MSPS sampling rates, programmable DLL clock multiplier, auxiliary 10-bit ADC and 8-bit DAC resources, and industrial temperature operation (–40°C to +70°C).

Technical Context

The AD9860BSTZRL implements a fully integrated MxFE architecture with independent Rx and Tx signal chains: each Rx channel includes input buffer (200 Ω differential impedance), RxPGA, 10-bit ADC, decimation filter, and bypassable digital Hilbert filter; each Tx channel features 12-bit DAC, TxPGA, interpolation (×2/×4), Hilbert filter, and complex/real digital mixer. Timing is synchronized via a programmable delay-locked loop (DLL) accepting single crystal or external clock inputs.

It supports flexible data interface modes (multiplexed or interleaved), SPI register programming, and configurable low-power operation - including Rx path power-down (6 mA), selectable buffer bypass, and interpolation-dependent latency (30 cycles at ×2, 72 at ×4). Auxiliary functions include three 8-bit DAC outputs, two 10-bit ADC inputs with dual multiplexing, and programmable sigma-delta output.

Key Specifications

Pinout & Package

AD9860BSTZRL is housed in a 128-lead Low Profile Quad Flatpack (LQFP), thermally rated at θ_JA = 29°C/W. The package supports standard surface-mount reflow and includes dedicated analog/digital ground and supply pins for noise isolation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9862BSTZ, AD9860BSTZRL trades 2-bit DAC/ADC resolution and 1.3 dB SNR for lower power and cost; compared with MAX2024ETM+, it adds full-duplex capability and auxiliary converters at the expense of package size and complexity.

Availability

AD9860BSTZRL is available at Aetrix Electronics and suitable for cable modem development, fixed wireless infrastructure, and VDSL line card production requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for AD9860BSTZRL 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, serving industrial, communications, automotive, and consumer markets.

The AD9860BSTZRL belongs to Analog Devices' MxFE™ (Mixed-Signal Front-End) product line, engineered specifically for broadband communications infrastructure demanding integrated, low-footprint, high-dynamic-range signal conversion with flexible digital processing.

FAQ

What is the maximum sampling rate supported by the AD9860BSTZRL ADC and DAC?

The AD9860BSTZRL supports a maximum ADC sampling rate of 64 MSPS and a maximum DAC update rate of 128 MSPS. These rates are specified under normal timing mode with VA = 3.3 V ±5% and VD = 3.3 V ±10%. The ADC's 10-bit resolution and DAC's 12-bit resolution are maintained across these full-rate operations, enabling high-fidelity digitization and synthesis of broadband signals in cable and wireless systems using the AD9860BSTZRL.

Does the AD9860BSTZRL support both real and complex (I/Q) signal processing?

Yes, the AD9860BSTZRL natively supports both real and complex signal paths. Its receive path includes a bypassable digital Hilbert filter and decimation logic for I/Q or real-mode operation; the transmit path integrates digital quadrature mixers and Hilbert filters to generate complex up-converted waveforms. This flexibility allows the AD9860BSTZRL to serve as the core front-end in systems ranging from single-carrier cable modems to OFDM-based WLAN and fixed wireless transceivers.

How is clock generation handled on the AD9860BSTZRL?

The AD9860BSTZRL uses an integrated programmable delay-locked loop (DLL) to generate all internal clocks from a single external reference - either a crystal connected to OSC1/OSC2 or a CMOS clock applied to OSC1. The DLL produces two programmable outputs (CLKOUT1 and CLKOUT2) ranging from 32 MHz to 128 MHz with 50% duty cycle, eliminating the need for multiple oscillators and simplifying system clock architecture in designs using the AD9860BSTZRL.

What auxiliary analog functions does the AD9860BSTZRL provide?

The AD9860BSTZRL integrates three 8-bit auxiliary DAC outputs (AUX_DAC_A/B/C, 3 V full-scale) and two 10-bit auxiliary ADC inputs (AUX_ADC_A1/A2 and AUX_ADC_B1/B2, 1.25 MSPS, dual-muxed). These resources support system-level functions such as bias voltage generation, temperature/voltage monitoring, calibration loop closure, and programmable sigma-delta output - reducing external component count in broadband communication designs using the AD9860BSTZRL.

Is the AD9860BSTZRL pin-compatible with the AD9862BSTZ?

No, the AD9860BSTZRL is not pin-compatible with the AD9862BSTZ. Although both share the same 128-lead LQFP package (ST-128B) and identical pinout layout per the datasheet pin configuration diagram, functional differences exist in internal register mapping and some timing behaviors. Designers must validate register initialization sequences and performance margins separately; migration requires firmware and layout review, not drop-in replacement. The AD9860BSTZRL and AD9862BSTZ are functionally related but not mechanically interchangeable without verification.