Analog Devices Inc. AD7466BRM-REEL7

Overview

AD7466BRM-REEL7 from Analog Devices is a 12-bit, successive approximation analog-to-digital converter (ADC) optimized for micropower operation in battery-powered systems. It operates from a single 1.6 V to 3.6 V supply, delivers up to 200 kSPS throughput, achieves 70 dB SNR at 30 kHz input, and consumes only 0.12 mW typical at 100 kSPS with 1.6 V supply. Its internal VDD-referenced architecture enables full-scale 0 V to VDD analog input range.

For engineers reviewing the AD7466BRM-REEL7 datasheet, AD7466BRM-REEL7 pinout, AD7466BRM-REEL7 application, or AD7466BRM-REEL7 equivalent, key selection criteria include its 12-bit resolution with ±1.5 LSB INL, 6-lead SOT-23 package, SPI/QSPI/MICROWIRE-compatible serial interface, automatic power-down mode (8 nA typical), and guaranteed no missing codes - all critical for precision, low-voltage data acquisition in space-constrained designs.

Technical Context

The AD7466BRM-REEL7 implements a standard successive approximation register (SAR) ADC architecture with no pipeline delay, sampling on the falling edge of CS and initiating conversion simultaneously. Its track-and-hold amplifier supports >3 MHz full-power bandwidth and handles input frequencies up to 30 kHz with 70 dB SNR at 1.6–3.6 V supplies.

Conversion timing is fully controlled by the external SCLK: 16 clock cycles required for AD7466 (max 4.70 μs at 3.4 MHz), with automatic power-down activated between conversions. The reference is derived directly from VDD, eliminating external reference components while maintaining 0 V to VDD input range and simplifying system-level design.

Key Specifications

Pinout & Package

AD7466BRM-REEL7 is housed in a 6-lead SOT-23 package (JEDEC MO-178AA), measuring 2.9 mm × 1.6 mm × 1.1 mm, suitable for ultra-compact PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit SAR ADC applications.

Compared with ADS7822U and MAX11100ETE+, AD7466BRM-REEL7 uniquely supports true 1.6 V operation and delivers lowest active and standby power in its class - making it the only option for long-life, single-cell-powered precision acquisition where voltage headroom and energy efficiency are non-negotiable.

Availability

AD7466BRM-REEL7 is available at Aetrix Electronics and suitable for battery-powered systems, portable medical instruments, and remote data acquisition requiring stable component supply, consistent parametric performance, and long-term manufacturability assurance.

Supply support for AD7466BRM-REEL7 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 decades of expertise in precision data conversion and low-power design.

The AD7466BRM-REEL7 belongs to Analog Devices' micropower SAR ADC family, engineered specifically for ultra-low-energy, space-constrained signal acquisition in portable and battery-dependent applications - balancing resolution, speed, and power efficiency without external reference or support components.

FAQ

What is the maximum sampling rate supported by the AD7466BRM-REEL7?

The AD7466BRM-REEL7 supports a maximum throughput rate of 200 kSPS, achieved with a 3.4 MHz SCLK and 16 serial clock cycles per conversion. At lower SCLK frequencies, the throughput scales linearly - for example, 1 MHz SCLK yields ~62.5 kSPS. This fixed 16-cycle timing ensures predictable latency and simplifies timing budgeting in real-time systems.

Does the AD7466BRM-REEL7 require an external voltage reference?

No, the AD7466BRM-REEL7 uses an internal VDD-referenced architecture, meaning its full-scale analog input range is 0 V to VDD. This eliminates the need for an external reference IC, reducing BOM count, PCB area, and potential error sources such as reference drift or noise coupling - a key advantage in compact, cost-sensitive designs.

What package type is used for the AD7466BRM-REEL7?

The AD7466BRM-REEL7 is supplied in a 6-lead SOT-23 package (JEDEC MO-178AA), with dimensions of 2.9 mm × 1.6 mm × 1.1 mm. This ultra-small outline package supports high-density layouts and is compatible with standard surface-mount assembly processes, including reflow soldering per JEDEC J-STD-020.

How does the power-down mode function on the AD7466BRM-REEL7?

The AD7466BRM-REEL7 enters automatic power-down mode after each conversion completes and SDATA goes high-impedance. In this state, supply current drops to 0.1 μA maximum (8 nA typical), regardless of SCLK activity. Recovery to full operation requires one CS assertion, with acquisition time ≤640 ns at VDD ≥1.8 V - enabling rapid wake-up in burst-mode sensing.

Is the AD7466BRM-REEL7 pin-compatible with other members of the AD7466/67/68 family?

Yes, the AD7466BRM-REEL7 shares identical pinout and package (6-lead SOT-23) with AD7467BRM-REEL7 and AD7468BRM-REEL7. However, resolution (12/10/8-bit), conversion time (4.70/3.52/2.94 μs), and dynamic performance differ - allowing drop-in replacement only when system firmware and accuracy requirements align with the selected variant's specifications.