Analog Devices Inc. AD7467BRTZ-REEL7

Overview

AD7467BRTZ-REEL7 from Analog Devices is a 10-bit, micropower successive approximation ADC operating from 1.6 V to 3.6 V supply, delivering 275 kSPS throughput with 0.63 mW max power at 3 V and 100 kSPS, featuring SPI/QSPI/MICROWIRE/DSP-compatible serial interface and internal VDD-referenced conversion. It targets battery-powered sensor front-ends in portable medical devices and remote data acquisition nodes.

For engineers reviewing the AD7467BRTZ-REEL7 datasheet, AD7467BRTZ-REEL7 pinout, AD7467BRTZ-REEL7 application, or AD7467BRTZ-REEL7 equivalent, key selection considerations include its 10-bit resolution, 275 kSPS maximum throughput, 1.6 V minimum supply voltage, 8 nA typical power-down current, and SOT-23-6 package compatibility with space-constrained embedded systems.

Technical Context

The AD7467BRTZ-REEL7 implements a standard successive approximation register (SAR) architecture with no pipeline delay, sampling on the falling edge of CS and initiating conversion simultaneously. Its track-and-hold amplifier supports full-power bandwidth up to 3.2 MHz at 2.5–3.6 V supplies and handles input frequencies exceeding 3 MHz.

Conversion timing is fully controlled by the external SCLK signal-12 clock cycles required per conversion-and reference is derived internally from VDD, enabling 0 V to VDD analog input range without external reference components. Automatic power-down activates after each conversion, reducing average current consumption in burst-sampling applications.

Key Specifications

Pinout & Package

AD7467BRTZ-REEL7 is housed in a 6-lead SOT-23 package (3.0 mm × 1.7 mm × 1.3 mm), optimized for ultra-compact PCB layouts in portable instrumentation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit SAR ADC applications.

Compared with ADS7822U and MAX11100ETE+, AD7467BRTZ-REEL7 uniquely balances 10-bit precision, 275 kSPS speed, 1.6 V operation, and SOT-23-6 size-making it optimal for space- and energy-constrained portable instrumentation where neither 8-bit nor 12-bit trade-offs are acceptable.

Availability

AD7467BRTZ-REEL7 is available at Aetrix Electronics and suitable for battery-powered systems, medical instruments, remote data acquisition, and isolated data acquisition requiring stable component supply across extended production lifecycles.

Supply support for AD7467BRTZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The AD7466/AD7467/AD7468 family was designed specifically for ultra-low-power, single-supply data acquisition in portable and energy-harvesting applications-emphasizing micropower operation down to 1.6 V and minimal external component count.

FAQ

What is the maximum sampling rate supported by the AD7467BRTZ-REEL7?

The AD7467BRTZ-REEL7 supports a maximum throughput rate of 275 kSPS, achieved with a 3.4 MHz SCLK and 12 serial clock cycles per conversion. This rate is specified under conditions of VDD = 1.6 V to 3.6 V and TA = −40°C to +85°C. At lower SCLK frequencies, the throughput scales linearly-for example, 1 MHz SCLK yields ~83 kSPS. The AD7467BRTZ-REEL7 achieves this performance without pipeline delay, ensuring deterministic conversion latency.

Does the AD7467BRTZ-REEL7 require an external voltage reference?

No, the AD7467BRTZ-REEL7 uses an internal reference derived from the VDD supply, establishing a 0 V to VDD analog input range. This eliminates the need for external reference ICs, reduces BOM cost, and simplifies layout-especially critical in space-constrained designs. The internal reference contributes to the device's total unadjusted error of ±1 LSB max, and its ratiometric behavior ensures consistent performance across VDD variations within the 1.6–3.6 V range.

What package type is used for the AD7467BRTZ-REEL7?

The AD7467BRTZ-REEL7 is packaged in a 6-lead SOT-23 (Small Outline Transistor) case, with dimensions of 3.0 mm × 1.7 mm × 1.3 mm. This RoHS-compliant, surface-mount package supports reflow soldering and is optimized for high-density PCB layouts. Pin 1 is CS, and the package contains no NC pins-each terminal serves a defined function: CS, VDD, GND, VIN, SDATA, and SCLK-as confirmed in the official Analog Devices Rev. C datasheet.

How does power management work in the AD7467BRTZ-REEL7?

The AD7467BRTZ-REEL7 features automatic power-down activated after each conversion completes, reducing IDD to 0.1 μA max (8 nA typical) without host intervention. In normal operation at 100 kSPS and 3 V, it draws 210 μA max. Power-down mode persists until the next CS assertion, and the device powers up fully within 640 ns (at VDD ≥ 1.8 V) to acquire the next sample. This architecture enables ultra-low average power in duty-cycled applications like wireless sensors.

Which microcontrollers can interface directly with the AD7467BRTZ-REEL7?

The AD7467BRTZ-REEL7 supports SPI, QSPI, MICROWIRE, and DSP-compatible serial protocols-ensuring direct compatibility with most ARM Cortex-M, PIC, MSP430, and AVR microcontrollers equipped with hardware SPI peripherals. Its 4-leading-zero + 10-bit MSB-first data format, CS-controlled frame synchronization, and 3.4 MHz max SCLK allow seamless integration without bit-banging. Level-shifting is unnecessary for 1.8 V–3.3 V MCUs since logic thresholds scale with VDD (e.g., VINH = 0.7×VDD).