Analog Devices Inc. AD7417AR-REEL

Overview

AD7417AR-REEL from Analog Devices is a 10-bit, 4-channel analog-to-digital converter with integrated temperature sensor, I²C interface, and on-chip 2.5 V reference. It operates from 2.7 V to 5.5 V, delivers 15 μs conversion time for analog channels and 30 μs for temperature sensing (±1°C accuracy at 25°C), and supports ambient temperature monitoring in industrial process control systems.

For engineers reviewing the AD7417AR-REEL datasheet, AD7417AR-REEL pinout, AD7417AR-REEL application, or AD7417AR-REEL equivalent, key selection criteria include its 4-channel single-ended ADC capability, programmable overtemperature indicator (OTI), fault queue counter for noise immunity, and support for up to eight devices on one I²C bus via A0/A1/A2 address pins.

Technical Context

The AD7417AR-REEL integrates a 10-bit successive approximation ADC, 5-channel multiplexer (including Channel 0 for on-chip temperature sensor), track-and-hold amplifier with 400 ns acquisition time, internal clock oscillator, and I²C-compatible serial interface. Its configuration register enables OTI polarity and mode selection (comparator or interrupt), while the fault queue counter prevents spurious triggering by requiring configurable consecutive out-of-limit readings.

It supports both internal 2.5 V reference (REFIN tied to GND) and external 2.5 V reference (applied to REFIN), with automatic shutdown of the internal reference when external reference is active. Conversion can be initiated either by CONVST pulse or automatically after each I²C read/write operation.

Key Specifications

Pinout & Package

AD7417AR-REEL is housed in a 16-lead narrow-body SOIC (Small Outline Integrated Circuit) package, 0.15 inch width, RoHS-compliant, tape-and-reel format (REEL suffix). Pin count and layout match JEDEC MS-012 standard.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar temperature-sensing ADC applications.

Compared with AD7417AR-REEL, AD7418ARZ offers identical thermal performance in a smaller package but sacrifices three analog inputs, while LM75BIMM/NOPB provides lower-cost temperature-only functionality without ADC capability or fault queue robustness.

Availability

AD7417AR-REEL is available at Aetrix Electronics and suitable for industrial process control, embedded fan control, automotive cabin electronics, and PCB-level power sequencing monitoring requiring stable component supply and long-term manufacturability.

Supply support for AD7417AR-REEL 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 operations worldwide.

The AD7417AR-REEL belongs to Analog Devices' precision data acquisition portfolio, engineered for embedded thermal and voltage monitoring in space- and power-constrained industrial and automotive systems.

FAQ

What is the operating temperature range of the AD7417AR-REEL?

The AD7417AR-REEL is specified for operation from −40°C to +125°C (A Version). Its on-chip temperature sensor maintains ±1°C accuracy at 25°C and ±2°C over the full range, making it suitable for under-hood automotive and industrial control environments where ambient extremes are common. The SOIC package supports this extended range per JEDEC standards.

How does the AD7417AR-REEL handle multiple devices on the same I²C bus?

The AD7417AR-REEL uses hardware address pins A0, A1, and A2 to configure its 3-bit I²C slave address, allowing up to eight devices on a single bus. Each pin is binary-programmable (GND = 0, VDD = 1), and the base address is 0x48. This eliminates software address conflicts and enables scalable thermal/voltage monitoring across multi-board systems without bus arbitration overhead.

Can the AD7417AR-REEL use an external reference, and what happens to the internal reference?

Yes - applying a 2.5 V external reference to the REFIN pin disables the internal 2.5 V reference automatically. When REFIN is left unconnected or tied to GND, the internal reference activates. Using an external reference improves system-level accuracy if a higher-precision source (e.g., REF192) is available, but the internal reference's ±25 mV error and 80 ppm/°C tempco are sufficient for most industrial applications.

What is the function of the CONVST pin on the AD7417AR-REEL?

The CONVST pin initiates conversions via hardware trigger: a rising edge fully powers up the device (4 μs wake-up), and a falling edge ≥4 μs later places the track-and-hold in hold mode and starts conversion. For polled operation, CONVST can be held high; conversions then occur automatically after each I²C read/write. This dual-mode flexibility supports both deterministic timing and software-driven sampling.

Does the AD7417AR-REEL support interrupt-driven overtemperature detection?

Yes - the open-drain OTI pin can be configured in interrupt mode via the configuration register. When enabled, OTI asserts low upon exceeding the TOTI setpoint and remains asserted until cleared by a serial read operation. Combined with the programmable fault queue (1–16 samples), this provides reliable, noise-immune thermal interrupt signaling for real-time MCU response without continuous polling.