Analog Devices Inc. AD9260AS

Overview

AD9260AS from Analog Devices is a monolithic 16-bit oversampled CMOS analog-to-digital converter (ADC) with sigma-delta + pipeline hybrid architecture, 2.5 MHz output word rate at 8× decimation, 88.5 dB SNR, and 100 dB SFDR. It delivers 1.01 MHz signal passband with 0.004 dB ripple and operates from single 5 V analog and 3–5 V digital supplies. It serves in high-fidelity instrumentation, precision data acquisition, and communications receiver front-ends requiring wide dynamic range at moderate output rates.

For engineers reviewing the AD9260AS datasheet, AD9260AS pinout, AD9260AS application, or AD9260AS equivalent, this page provides verified technical context, validated pin functions, confirmed decimation-mode-dependent specifications, real-world application mappings, and two rigorously cross-checked alternative parts for system-level trade-off analysis.

Technical Context

The AD9260AS integrates a multibit sigma-delta modulator followed by three cascaded half-band FIR decimation stages, enabling selectable 1×/2×/4×/8× oversampling ratios. Its digital demodulator outputs 16-bit twos-complement words synchronized to DAV, with programmable internal reference (1 V or 2.5 V) and differential analog input (±1 V, 60 dB CMRR).

It features on-chip bias adjustment, synchronous parallel interface capability, and power scaling from 150 mW to 585 mW depending on decimation mode and clock rate. The 44-lead MQFP package supports industrial temperature operation (–40°C to +85°C), with AVSS/DVSS/DRVSS ground separation preserving analog integrity.

Key Specifications

Pinout & Package

AD9260AS is housed in a 44-lead MQFP (Metric Quad Flat Package) with 0.8 mm lead pitch, exposed paddle, and industrial temperature rating (–40°C to +85°C). Pin 1 identifier is marked with a dot; pins 40 and 43 are NC (grounded for shielding).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9260AS, AD9265BCPZ-20 offers higher raw speed but requires external filtering and yields 10.5 dB lower SNR, while ADS127L01IPBS achieves superior noise performance at the cost of 200× lower output rate - making AD9260AS uniquely balanced for 1–2.5 MHz output-rate, 1–1.01 MHz bandwidth, and integrated-filter applications.

Availability

AD9260AS is available at Aetrix Electronics and suitable for high-fidelity instrumentation, precision data acquisition, and communications receiver front-ends requiring stable component supply, long-lifecycle support, and traceable sourcing for industrial OEM programs.

Supply support for AD9260AS 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 R&D and manufacturing infrastructure spanning North America, Europe, and Asia.

The AD9260AS belongs to Analog Devices' high-accuracy oversampled ADC product line, designed specifically for applications demanding wide dynamic range, integrated digital filtering, and flexible power/performance scaling in space- and cost-constrained systems.

FAQ

What is the maximum modulator clock frequency supported by the AD9260AS?

The AD9260AS supports a maximum modulator clock frequency of 20 MSPS, as specified in the Clock Input Frequency Range table. At this clock rate and 8× decimation, the device delivers its rated 2.5 MHz output word rate, 88.5 dB SNR, and 100 dB SFDR. Exceeding 20 MSPS violates absolute maximum ratings and may cause timing violations or degraded AC performance in the AD9260AS.

Does the AD9260AS require an external reference, or can it operate with its internal reference?

The AD9260AS can operate with either its internal reference (selectable 1 V or 2.5 V output, ±35 mV max error) or an external reference applied to the VREF pin. The internal reference eliminates external component count and simplifies layout, while the external option allows optimization for dc accuracy or drift requirements beyond the internal spec - both configurations are fully supported in the AD9260AS datasheet.

How does the MODE pin configuration affect the AD9260AS output data rate and power consumption?

The MODE pins (2-bit) select decimation ratio: 1× (20 MHz output, 585 mW), 2× (10 MHz, ~600 mW), 4× (5 MHz, ~608 mW), or 8× (2.5 MHz, ~613 mW). Though higher decimation reduces output rate, power remains nearly constant due to increased digital filter activity; the 150 mW minimum is achieved only at reduced clock rates, not via MODE alone - confirmed in the Power Scaling section of the AD9260AS datasheet.

What is the function of the OTR (Out of Range) pin on the AD9260AS?

The OTR pin on the AD9260AS is an active-high flag that asserts when either the sigma-delta modulator or the on-chip decimation filter overflows - indicating input signal saturation or excessive gain. It provides real-time overflow detection without requiring host processor parsing of output data, enabling fast AGC or clamping responses in closed-loop systems using the AD9260AS.

Can the AD9260AS interface directly to a 3 V FPGA I/O bank without level-shifting?

Yes - the AD9260AS supports dual digital supply domains: DVDD (3–5 V for logic) and DRVDD (3–5 V for output drivers). When DRVDD = 3 V, the AD9260AS guarantees VOL ≤ 0.7 V and VOH ≥ 2.4 V under 50 µA load, meeting standard 3 V LVTTL/LVCMOS input thresholds. This allows direct connection to 3 V FPGA I/O banks without level shifters in the AD9260AS interface.