Analog Devices Inc. AD7452BRTZ-R2

Overview

AD7452BRTZ-R2 from Analog Devices is a 12-bit, successive approximation (SAR) analog-to-digital converter with fully differential input, 555 kSPS maximum throughput, 70 dB SINAD at 100 kHz, and operation from single 3 V or 5 V supply. It targets high-accuracy transducer interface and portable instrumentation where low power and wide input bandwidth are critical.

For engineers reviewing the AD7452BRTZ-R2 datasheet, AD7452BRTZ-R2 pinout, AD7452BRTZ-R2 application, or AD7452BRTZ-R2 equivalent, key selection factors include its differential track-and-hold architecture, external reference flexibility (100 mV–3.5 V), SPI/QSPI/MICROWIRE-compatible serial interface, no pipeline delay, and 8-lead SOT-23 package footprint.

Technical Context

The AD7452BRTZ-R2 employs a charge redistribution SAR architecture with dual capacitive DACs and a differential track-and-hold amplifier supporting up to 3.5 MHz input bandwidth. Its conversion is initiated by the falling edge of CS and clocked by SCLK, enabling precise sampling control without latency.

It features twos complement output coding, 16-cycle serial readout (four leading zeros + 12-bit data), and full power-down mode drawing ≤1 μA. Reference voltage directly sets full-scale span (2 × VREF) and common-mode range, allowing configurable input biasing across 3 V and 5 V supply rails.

Key Specifications

Pinout & Package

AD7452BRTZ-R2 is housed in an 8-lead SOT-23 package (3.0 mm × 1.7 mm × 1.3 mm body, 0.95 mm pitch), optimized for space-constrained PCB layouts in portable and embedded systems.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7452BRTZ-R2, AD7451ARTZ-REEL7 trades 2 bits of resolution for higher speed and identical footprint, while ADS7822U offers matching resolution at lower throughput in a larger package-neither is pin-compatible, but both serve overlapping functional roles in cost- or size-flexible designs.

Availability

AD7452BRTZ-R2 is available at Aetrix Electronics and suitable for transducer interface, battery-powered instrumentation, and motor control applications requiring stable component supply, long-term manufacturability, and guaranteed traceability.

Supply support for AD7452BRTZ-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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.

The AD7452BRTZ-R2 belongs to Analog Devices' precision SAR ADC product line, engineered for applications demanding high DC accuracy, low power, and robust AC performance in compact form factors.

FAQ

What is the maximum sampling rate supported by the AD7452BRTZ-R2?

The AD7452BRTZ-R2 supports a maximum throughput rate of 555 kSPS under specified conditions (10 MHz SCLK, VDD = 2.7–3.6 V or 4.75–5.25 V, VREF = 2.0 V or 2.5 V). This rate is achieved with a fixed 16-cycle serial readout and no pipeline delay, ensuring deterministic timing for real-time control applications. The AD7452BRTZ-R2 maintains this rate across its full operating temperature range (–40°C to +85°C).

Does the AD7452BRTZ-R2 require an external voltage reference?

Yes, the AD7452BRTZ-R2 requires an external reference applied to the VREF pin. It does not include an internal reference. The reference voltage determines the full-scale differential input span (2 × VREF) and common-mode range. For specified performance, VREF is 2.0 V ±1% with 3 V supply and 2.5 V ±1% with 5 V supply, though the device remains functional with VREF from 100 mV to 3.5 V depending on supply rail.

What serial interface protocols is the AD7452BRTZ-R2 compatible with?

The AD7452BRTZ-R2 is compatible with SPI, QSPI, MICROWIRE, and DSP serial interfaces. Its SDATA output is three-state, and data is clocked out MSB-first on the falling edge of SCLK, preceded by four leading zeros. The CS input provides frame synchronization and conversion initiation, enabling seamless integration with microcontrollers and digital signal processors without protocol translation hardware.

How does the AD7452BRTZ-R2 manage power consumption during low-throughput operation?

The AD7452BRTZ-R2 implements a full power-down mode that reduces supply current to ≤1 μA, regardless of SCLK state. This mode is entered via the serial interface and eliminates dynamic power draw while preserving configuration. Combined with flexible SCLK-driven throughput scaling, it enables ultra-low average power in duty-cycled applications such as wireless sensor nodes, where the AD7452BRTZ-R2 spends most time in shutdown between brief acquisition bursts.

What is the significance of the differential input architecture in the AD7452BRTZ-R2?

AD7452BRTZ-R2's fully differential input provides inherent common-mode noise rejection, doubled dynamic range versus single-ended inputs, and improved distortion performance. With matched source impedances on VIN+ and VIN−, it achieves 70 dB SINAD at 100 kHz and supports input frequencies up to 3.5 MHz. This architecture is essential for accurate digitization of low-amplitude signals in electrically noisy environments like motor drives or industrial transducer interfaces.