Analog Devices Inc. AD9260ASZ

Overview

AD9260ASZ from Analog Devices is a monolithic 16-bit oversampling CMOS analog-to-digital converter (ADC) with sigma-delta + pipeline hybrid architecture, 8× decimation capability, 2.5 MHz output word rate at 20 MSPS modulator clock, 88.5 dB SNR, and 100 dB SFDR. It delivers high dynamic range for precision instrumentation and communications receiver front-ends requiring clean digitization of low-frequency wide-dynamic-range signals.

For engineers reviewing the AD9260ASZ datasheet, AD9260ASZ pinout, AD9260ASZ application, or AD9260ASZ equivalent, this page provides verified circuit role, validated 44-lead MQFP package mapping, confirmed decimation filter characteristics, power scaling behavior across 1×–8× modes, and real-world interface timing constraints including DAV setup/hold and RESET synchronization.

Technical Context

The AD9260ASZ integrates a multibit sigma-delta modulator followed by three cascaded half-band FIR decimation stages, enabling selectable 1×, 2×, 4×, or 8× oversampling ratios. Its digital demodulator outputs 16-bit two's complement data at rates from 2.5 MHz (8×) to 20 MHz (1×), with programmable reference (1 V or 2.5 V) and on-chip reference buffer.

It features differential analog input (±1 V, 2.0 V common-mode), 60 dB CMRR, 75 MHz full-power bandwidth, and aperture jitter of 2 ps rms. Power dissipation scales from 150 mW (low-clock 1× mode) to 585 mW (full-rate 8× mode), supported by independent AVDD (+5 V), DVDD (+3 V/+5 V), and DRVDD (+3 V/+5 V) supplies.

Key Specifications

Pinout & Package

The AD9260ASZ is housed in a 44-lead MQFP (Metric Quad Flat Package) with 0.8 mm lead pitch, thermally enhanced for industrial temperature operation (–40°C to +85°C). Pin 1 identifier located at top-left corner; exposed paddle electrically connected to AVSS.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-resolution oversampling ADC applications.

Compared with AD9260ASZ, AD9265BCPZ-125 offers higher sample rate but no embedded decimation, while ADS127L01IPBSR delivers superior low-frequency SNR yet cannot support the 1.01 MHz passband required by communications or ultrasound applications.

Availability

AD9260ASZ is available at Aetrix Electronics and suitable for communications receiver IF digitization, high-precision instrumentation data acquisition, ultrasound beamforming front-ends, and industrial process monitoring systems requiring stable component supply over extended production lifecycles.

Supply support for AD9260ASZ 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 and manufacturing expertise spanning precision conversion, amplification, and RF technologies.

The AD9260ASZ belongs to Analog Devices' high-speed precision ADC product line, engineered specifically for applications demanding wide dynamic range, low distortion, and flexible digital filtering in compact industrial and communications platforms.

FAQ

What is the maximum input frequency supported by the AD9260ASZ in 8× oversampling mode?

The AD9260ASZ supports a 1.01 MHz signal passband with 0.004 dB ripple in 8× mode, as specified in the FEATURES section. Full-power bandwidth is 75 MHz regardless of decimation ratio, but usable signal bandwidth is limited by the decimation filter cutoff. For 100 kHz sinusoidal inputs, SNR remains 88.5 dB; performance degrades above 1 MHz due to filter roll-off and reduced SFDR.

Does the AD9260ASZ require an external reference, or can it operate with its internal reference?

The AD9260ASZ can operate with either its internal 1 V or 2.5 V reference (selected via SENSE pin), or with an external reference applied to the VREF pin. Internal reference accuracy is ±35 mV max for 2.5 V mode. External reference use is recommended when tighter dc accuracy or lower temperature drift is required, as the internal reference exhibits 7.0 ppm/°C gain error drift.

How does power consumption scale with decimation ratio in the AD9260ASZ?

AD9260ASZ power scales from 585 mW at full 8× mode (20 MSPS clock, 2.5 MHz output) down to 150 mW in reduced-clock 1× mode. Table 2 shows typical power consumption of 613 mW (8×), 608 mW (4×), 600 mW (2×), and 585 mW (1×) - indicating that lower decimation ratios reduce digital filter activity but maintain modulator power, yielding modest overall savings unless clock rate is also reduced.

What is the function of the OTR (Out of Range) pin on the AD9260ASZ?

The OTR pin on the AD9260ASZ is an active-high flag signaling overflow in either the sigma-delta modulator or the on-chip decimation filter. It asserts when internal data paths exceed their representable range, indicating potential clipping or saturation. This signal is critical for closed-loop gain control systems, allowing real-time adjustment of input attenuation before data corruption occurs in the AD9260ASZ output stream.

Can the AD9260ASZ interface directly with a 3.3 V FPGA I/O bank?

Yes - the AD9260ASZ supports dual digital supply domains: DVDD (digital core) and DRVDD (output drivers) can each be independently set to +3 V or +5 V. When DRVDD = +3 V, logic outputs meet 3.3 V LVTTL/LVCMOS levels: VOH ≥ +2.4 V (IOH = 50 µA), VOL ≤ +0.7 V (IOL = 50 µA), making it compatible with standard 3.3 V FPGA I/O without level-shifting circuitry.