Analog Devices Inc. AD7453ARTZ-REEL7

Overview

AD7453ARTZ-REEL7 from Analog Devices is a 12-bit pseudo-differential successive approximation (SAR) ADC in an 8-lead SOT-23 package, operating from 2.7 V to 5.25 V with 555 kSPS throughput, 70 dB SINAD at 100 kHz, and SPI/QSPI/MICROWIRE-compatible serial interface - used for precision transducer interfacing in portable instrumentation.

For engineers reviewing the AD7453ARTZ-REEL7 datasheet, AD7453ARTZ-REEL7 pinout, AD7453ARTZ-REEL7 application, or AD7453ARTZ-REEL7 equivalent, key selection criteria include its pseudo-differential input architecture, external reference flexibility (100 mV to VDD), no-pipeline-delay SAR operation, 1 µA power-down current, and SOT-23 footprint suitability for space-constrained battery-powered systems.

Technical Context

The AD7453ARTZ-REEL7 implements a capacitive charge redistribution SAR architecture with dual sampling capacitor arrays and on-chip differential track-and-hold amplifier supporting up to 3.5 MHz input bandwidth. Conversion is initiated by CS falling edge and clocked by SCLK, with 16-cycle conversion time at 10 MHz SCLK.

It features straight binary output coding, 12-bit resolution with ±1 LSB INL (B version), and pseudo-differential analog input where VIN– establishes a dc offset reference for VIN+, enabling common-mode rejection without requiring true differential signal sources.

Key Specifications

Pinout & Package

AD7453ARTZ-REEL7 is housed in an 8-lead SOT-23 package (JEDEC MO-178AA, 2.9 mm × 1.6 mm × 1.1 mm), optimized for high-density PCB layouts and low thermal resistance (θJA = 211.5°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7822IDR and MAX11100ETE+, the AD7453ARTZ-REEL7 uniquely balances 12-bit accuracy, pseudo-differential input flexibility, ultra-low 3.3 mW active power at 3 V, and minimal SOT-23 footprint - making it optimal for precision, size- and energy-constrained sensing nodes.

Availability

AD7453ARTZ-REEL7 is available at Aetrix Electronics and suitable for transducer interface, battery-powered systems, and portable instrumentation requiring stable component supply, consistent parametric performance, and long-term manufacturability assurance.

Supply support for AD7453ARTZ-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 design and manufacturing expertise spanning precision data conversion, amplification, and power management.

The AD7453ARTZ-REEL7 belongs to Analog Devices' precision SAR ADC product line, engineered specifically for low-power, high-accuracy data acquisition in portable and space-constrained industrial systems where deterministic latency and flexible reference scaling are essential.

FAQ

What is the maximum input frequency supported by the AD7453ARTZ-REEL7 before SNR degradation becomes significant?

The AD7453ARTZ-REEL7 maintains 70 dB SINAD up to 100 kHz input frequency under standard conditions (VREF = 2.5 V, VDD = 5 V). Its full-power bandwidth is 20 MHz (–3 dB), but usable dynamic performance degrades above ~200 kHz due to aperture jitter (50 ps typ) and track-and-hold settling limits. For best results, keep analog input frequencies below 100 kHz when targeting >10-bit ENOB.

Can the AD7453ARTZ-REEL7 operate with a 1.8 V supply?

No, the AD7453ARTZ-REEL7 requires a minimum VDD of 2.7 V per its absolute maximum ratings and functional specifications. Operation below 2.7 V is not characterized and may result in incorrect conversions, increased DNL, or failure to enter power-down mode. For 1.8 V systems, consider the AD7476A series or similar low-voltage SAR ADCs.

How does the pseudo-differential input of the AD7453ARTZ-REEL7 differ from a true differential input?

The AD7453ARTZ-REEL7's pseudo-differential input uses VIN+ as the signal path and VIN– as a user-defined DC bias reference (e.g., 0 V or mid-supply), rather than accepting complementary signal pairs. This configuration rejects common-mode noise on VIN+ relative to VIN– but does not inherently reject even-order harmonics like a true differential front-end. It simplifies signal conditioning while retaining key noise immunity benefits.

What is the recommended decoupling for the VREF pin of the AD7453ARTZ-REEL7?

Analog Devices specifies a minimum 0.1 µF ceramic capacitor between VREF and GND, placed as close as possible to the AD7453ARTZ-REEL7 package. For high-precision applications or noisy environments, add a 10 µF tantalum or polymer capacitor in parallel. Avoid using only large electrolytics, as their ESL degrades high-frequency PSRR; the 0.1 µF cap handles >100 kHz noise while the bulk cap stabilizes low-frequency drift.

Is the AD7453ARTZ-REEL7 pin-compatible with other members of the AD745x family?

Yes, the AD7453ARTZ-REEL7 shares identical pinout and package (8-lead SOT-23) with the AD7452 and AD7457, both of which are also 12-bit SAR ADCs with pseudo-differential inputs. However, differences exist in throughput (AD7452: 1 MSPS; AD7457: 250 kSPS), power consumption, and INL spec - so direct substitution requires validation of timing, power, and accuracy requirements in the target application.