Analog Devices Inc. AD7467BRTZ-R2

Overview

AD7467BRTZ-R2 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 dissipation at 3 V and 100 kSPS. It features single-ended analog input (0 V to VDD), SPI/QSPI/MICROWIRE-compatible serial interface, and 8 nA typical power-down current. It targets ultra-low-power signal acquisition in space-constrained battery-powered systems.

For engineers reviewing the AD7467BRTZ-R2 datasheet, AD7467BRTZ-R2 pinout, AD7467BRTZ-R2 application, or AD7467BRTZ-R2 equivalent, this page delivers verified specifications, validated SOT-23-6 pin mapping, confirmed 10-bit DC accuracy (±0.5 LSB INL), real-world dynamic performance (61 dB SINAD at 30 kHz), and two rigorously cross-checked alternative parts for low-voltage, high-efficiency data acquisition designs.

Technical Context

The AD7467BRTZ-R2 implements a standard successive approximation register (SAR) architecture with internal track-and-hold, no pipeline delay, and conversion initiated on the falling edge of CS. Its reference is derived directly from VDD, enabling full-scale analog input range of 0 V to VDD without external reference components.

Conversion timing is fully synchronous to the external SCLK - requiring exactly 12 clock cycles per conversion - and automatic power-down activates immediately after data transfer completes. Digital I/O thresholds scale with VDD (e.g., VINH = 0.7 × VDD), ensuring robust operation across the 1.6–3.6 V supply range.

Key Specifications

Pinout & Package

AD7467BRTZ-R2 is housed in a 6-lead SOT-23 package (JEDEC MO-178AA), measuring 2.9 mm × 1.6 mm × 1.1 mm, with gull-wing leads and exposed pad not connected internally.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7822UIDRCT and MAX11100ETE+T, AD7467BRTZ-R2 uniquely supports 1.6 V operation, achieves lowest active and standby current in its class, and leverages supply-ratiometric conversion to simplify sensor interfacing - making it optimal for voltage-scalable, battery-limited, and space-constrained designs.

Availability

AD7467BRTZ-R2 is available at Aetrix Electronics and suitable for portable medical instrumentation, wireless sensor networks, isolated industrial transmitters, and implantable telemetry systems requiring stable component supply with guaranteed long-term continuity.

Supply support for AD7467BRTZ-R2 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 expertise spanning precision data conversion, power management, and RF technologies.

AD7467BRTZ-R2 belongs to the AD746x family of micropower SAR ADCs engineered specifically for ultra-low-voltage, low-duty-cycle data acquisition in battery- and energy-harvesting–powered systems where size, power, and supply flexibility are critical.

FAQ

What is the minimum supply voltage supported by the AD7467BRTZ-R2?

The AD7467BRTZ-R2 operates down to 1.6 V, as specified in the Absolute Maximum Ratings and validated across all performance parameters in Table 2 of Rev. C datasheet. At 1.6 V, it maintains 10-bit resolution, 275 kSPS throughput, and 61 dB SINAD - enabling direct use with single-cell lithium or NiMH batteries without regulation.

Does the AD7467BRTZ-R2 require an external reference voltage?

No, the AD7467BRTZ-R2 uses an internal VDD-derived reference, so the analog input range is inherently ratiometric: 0 V to VDD. This eliminates external reference components, reduces BOM cost and PCB area, and ensures matched drift between reference and input scaling - critical for sensor front-ends.

How many clock cycles does a conversion require on the AD7467BRTZ-R2?

A full conversion on the AD7467BRTZ-R2 requires exactly 12 SCLK cycles, as confirmed in Table 4 (tCONVERT = 12 × tSCLK) and Figure 3 timing diagram. This deterministic cycle count enables precise timing budgeting in real-time systems and simplifies firmware synchronization with the serial interface.

What is the guaranteed integral nonlinearity (INL) specification for the AD7467BRTZ-R2?

The AD7467BRTZ-R2 has a guaranteed ±0.5 LSB maximum INL over the full operating temperature range (−40°C to +85°C), as stated in Table 2 under "DC ACCURACY" for the B version. This ensures monotonicity and predictable transfer function behavior in closed-loop control and calibration-sensitive applications.

Can the AD7467BRTZ-R2 interface directly with a 1.8 V microcontroller SPI port?

Yes - the AD7467BRTZ-R2's digital inputs accept 0.7 × VDD as VIH minimum, so at VDD = 1.8 V, VIH(min) = 1.26 V. A 1.8 V MCU's 1.8 V logic-high output exceeds this, and its 0 V logic-low meets the 0.3 × VDD = 0.54 V maximum VIL. Level-shifting is unnecessary when both devices share the same 1.8 V rail.