Analog Devices Inc. AD7262BSTZ

Overview

AD7262BSTZ from Analog Devices is a dual-channel, 12-bit, simultaneous-sampling SAR ADC with integrated programmable gain amplifier (PGA) and four on-chip comparators. It delivers 1 MSPS throughput per ADC, supports true differential analog inputs, offers 14 PGA gain settings (×1 to ×128), and operates across −40°C to +105°C for industrial motor control feedback acquisition.

For engineers reviewing the AD7262BSTZ datasheet, AD7262BSTZ pinout, AD7262BSTZ application, or AD7262BSTZ equivalent, this device is selected for high-precision, time-critical sensor monitoring where dual-channel synchronization, low-noise gain staging, and embedded signal conditioning are required - especially in encoder-based position sensing and multi-axis current/voltage measurement systems.

Technical Context

The AD7262BSTZ implements two independent successive approximation register (SAR) ADCs sharing a common serial interface, each preceded by a fully differential PGA with rail-to-rail input common-mode range and >1 GΩ input impedance. Its architecture enables true simultaneous sampling of two analog channels with matched acquisition timing and calibrated offset/gain error correction.

Four dedicated comparators are partitioned into two low-power (A/B) and two fast-propagation (C/D) pairs, each with independent supply domains (CA_CBVCC/CC_CDVCC) and ground references. The internal 2.5 V reference is buffered and selectable via REFSEL, supporting both internal and external reference configurations without reconfiguration of analog input scaling.

Key Specifications

Pinout & Package

AD7262BSTZ is housed in a 48-lead LFCSP (Lead Frame Chip Scale Package) with exposed metal paddle requiring soldering to PCB ground for thermal management and noise reduction. Pin numbering follows standard top-view orientation with Pin 1 indicator.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel SAR ADC applications.

Compared with AD7262BSTZ, AD7265BSTZ trades higher throughput for increased power and thermal load, while ADS8684IPWR prioritizes resolution and linearity over speed and integration - making AD7262BSTZ the optimal balance for industrial motor control where simultaneous sampling, embedded comparators, and 1 MSPS fidelity are jointly required.

Availability

AD7262BSTZ is available at Aetrix Electronics and suitable for industrial motor control, predictive maintenance sensor hubs, and high-reliability power electronics requiring stable component supply, extended temperature operation, and long-term production continuity.

Supply support for AD7262BSTZ 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.

The AD7262 product line targets high-accuracy, time-critical industrial sensing applications - specifically designed to integrate signal conditioning, simultaneous sampling, and real-time decision logic (via comparators) into a single compact package for motor control and automation systems.

FAQ

What is the maximum achievable throughput rate for AD7262BSTZ?

The AD7262BSTZ achieves a maximum throughput rate of 1 MSPS per ADC channel under specified conditions: AVCC = 5.25 V, fSCLK = 40 MHz, and PGA gain setting ≥ 2. This rate is sustained across the full −40°C to +105°C operating temperature range and enables real-time capture of fast transient events in motor control and power quality monitoring applications. The AD7262BSTZ maintains this performance without requiring external clock multiplication or oversampling techniques.

Does AD7262BSTZ support true differential analog inputs?

Yes, AD7262BSTZ supports true differential analog inputs on both ADC channels: VA+/VA− for ADC A and VB+/VB− for ADC B. Each pair accepts fully differential signals with rail-to-rail common-mode range and >1 GΩ input impedance. The differential architecture rejects common-mode noise and enables precise measurement of small signals superimposed on large DC offsets - critical for shunt-based current sensing and resolver interfaces.

How many PGA gain settings does AD7262BSTZ offer, and how are they configured?

The AD7262BSTZ provides 14 discrete PGA gain settings: ×1, ×2, ×3, ×4, ×6, ×8, ×12, ×16, ×24, ×32, ×48, ×64, ×96, and ×128. These are selected using the G0–G3 logic inputs, with specific binary combinations defining each gain value. When all G0–G3 pins are tied low, the PD0/DIN pin becomes active for SPI-based register programming of gain and other configuration parameters.

Can AD7262BSTZ operate with an external reference instead of the internal 2.5 V reference?

Yes, AD7262BSTZ supports external reference operation via the REFSEL pin: tying REFSEL to GND disables the internal 2.5 V reference and enables external reference application to VREFA and/or VREFB pins. External references must be stable, low-noise, and capable of driving the 4 Ω output impedance of the reference buffer. This mode is commonly used when system-level accuracy demands tighter reference tolerance than the internal ±5 mV spec.

What are the key differences between the four on-chip comparators in AD7262BSTZ?

AD7262BSTZ integrates four comparators partitioned into two functional groups: Comparators A and B are optimized for ultra-low power consumption (3 µA at 3.3 V), while Comparators C and D prioritize speed with propagation delays as low as 0.12 µs at 5 V. Each pair has independent supply domains (CA_CBVCC for A/B; CC_CDVCC for C/D) and ground references, enabling flexible power domain partitioning in mixed-voltage systems.