Analog Devices Inc. AD260AND-5

Overview

AD260AND-5 from Analog Devices is a high-speed logic isolator with integrated 37 V_p-p isolated power transformer, designed for unidirectional field-to-system signal isolation in industrial control systems. It provides five isolated input channels (S0–S4), 20 MHz bandwidth, 14 ns propagation delay, and 3.5 kV_rms isolation rating - enabling robust digital I/O isolation in PLC analog I/O cards and motor drive controls.

For engineers reviewing the AD260AND-5 datasheet, AD260AND-5 pinout, AD260AND-5 application, or AD260AND-5 equivalent, key selection criteria include its 5-input/0-output configuration, system-side three-state enable (ENABLESYS), field-side power supply generation capability (PWRxFLD pins), and compatibility with HCMOS/ACMOS logic levels across –25°C to +85°C.

Technical Context

The AD260AND-5 implements Analog Devices' IsoLogic™ architecture using capacitive-coupled data transmission across a 3.5 kV_rms isolation barrier, with each of its five input lines featuring Schmitt-trigger inputs and latch-based continuous update circuitry. Its integral center-tapped transformer supports push-pull drive at 150–300 kHz to deliver up to 1.5 W of isolated field-side power.

Unlike optocouplers, the AD260AND-5 achieves nanosecond-level edge symmetry (±1 ns) and maintains output validity within 12 µs after power-up reset or fault recovery via background input polling every ~5 µs. All five inputs are unidirectional (S0–S4 → F0–F4), with no output drivers on the field side - confirmed by pin function table and AD260BND-5 schematic.

Key Specifications

Pinout & Package

AD260AND-5 is housed in a 22-lead plastic DIP (ND-22) package with ≥18 mm creepage distance between system and field sides, supporting 750 V mains isolation per CSA/IEC standards. Pin 1 is marked with a notch; system-side pins occupy positions 1–8 and 15–17; field-side pins occupy positions 18–22 and 9–14 (with DRVA/DRVCT/DRVB/PWRBFLD/PWRCTFLD/PWRAFLD active).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed logic isolation applications.

Compared with ADuM1300ARW and Si8650BD-B-IS, the AD260AND-5 uniquely combines five 20 MHz input channels with an integral 1.5 W isolated power transformer - making it the only option that eliminates both discrete optocouplers and isolated DC/DC converters in 5 V industrial I/O designs.

Availability

AD260AND-5 is available at Aetrix Electronics and suitable for PLC/DCS analog I/O cards, IGBT motor drive controls, industrial data acquisition systems, distributed control system nodes, and high-speed digital I/O ports requiring stable component supply and long-term industrial lifecycle support.

Supply support for AD260AND-5 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 AD260 series belongs to Analog Devices' IsoLogic™ isolator product line, engineered specifically for industrial automation applications demanding simultaneous high-speed digital isolation and integrated isolated power generation in a single package.

FAQ

What is the isolation voltage rating of the AD260AND-5?

The AD260AND-5 is rated for 3.5 kV_rms isolation test voltage (100% production tested), with an operating isolation voltage of 1.25 kV_rms. This meets UL1950, IEC950, and EN60950 safety requirements and supports 750 V mains isolation via ≥18 mm creepage spacing in the ND-22 package. The AD260AND-5 achieves this using Analog Devices' proprietary IsoLogic™ capacitive isolation architecture.

Does the AD260AND-5 provide isolated power, and how is it used?

Yes, the AD260AND-5 integrates a center-tapped transformer capable of delivering up to 1.5 W of isolated field-side power. Driven push-pull at 150–300 kHz on the system side (pins DRVA/DRVCT/DRVB), it generates 37 V_p-p on the secondary (pins PWRAFLD/PWRCTFLD/PWRBFLD), which can be rectified and regulated to ±5 V, +24 V, or other required field-side rails. This eliminates the need for an external isolated DC/DC converter in the AD260AND-5 design.

How does the AD260AND-5 handle power-up and fault recovery?

The AD260AND-5 features a continuous update circuit that polls all five inputs every ~5 µs. After power-up (when +5 V_dcSYS and +5 V_dcFLD exceed 3.3 V), it enters a ~30 µs reset interval, after which outputs reflect valid input states within 12 µs - even without input transitions. This guarantees deterministic behavior during startup or after fault conditions, a critical requirement for safe industrial control systems using the AD260AND-5.

What are the logic voltage levels supported by the AD260AND-5 inputs and outputs?

The AD260AND-5 inputs (S0–S4) accept standard 5 V HCMOS/ACMOS logic levels, with typical VT+ = 2.7 V and VT− = 1.8 V at +5 V_dcSYS. Outputs (F0–F4) drive CMOS-compatible loads: VOH = 3.7 V min at 4 mA, VOL = 0.4 V max at 4 mA. Both sides operate from 4.5–5.5 V supplies, with quiescent current of 4 mA per side - confirmed in the AD260AND-5 datasheet specifications table.

Can the AD260AND-5 be used in bidirectional communication?

No - the AD260AND-5 is strictly unidirectional: inputs on the system side (S0–S4), outputs on the field side (F0–F4). Its pin configuration (per Table I and AD260BND-5 schematic) confirms zero output drivers on the system side and zero input receivers on the field side. For bidirectional isolation, other AD260 variants (e.g., AD260AND-2 or AD260AND-3) or alternative isolators must be selected; the AD260AND-5 is optimized for field-to-system monitoring only.