Analog Devices Inc. AD7863AR-2REEL

Overview

AD7863AR-2REEL from Analog Devices is a dual-channel, simultaneous-sampling 14-bit analog-to-digital converter (ADC) operating from a single 5 V supply. It delivers 175 kSPS throughput per channel with 5.2 μs conversion time, ±2.5 V input range (AD7863-2 variant), and integrated 2.5 V reference - designed for precision phase-coherent acquisition in motor control and power quality monitoring systems.

For engineers reviewing the AD7863AR-2REEL datasheet, AD7863AR-2REEL pinout, AD7863AR-2REEL application, or AD7863AR-2REEL equivalent, key selection criteria include simultaneous dual-channel sampling, aperture delay matching ≤350 ps, 77 dB SNR at 80 kHz, 14-bit no-missing-codes performance, and SOIC_W 28-lead package compatibility with industrial signal conditioning layouts.

Technical Context

The AD7863AR-2REEL implements two independent successive approximation register (SAR) ADCs with matched track-and-hold amplifiers, enabling true simultaneous sampling of VA1/VA2 or VB1/VB2 pairs. Its internal 2.5 V reference (±10 mV error at 25°C, 25 ppm/°C TC) directly supports unipolar 0 V to 2.5 V input scaling without external components.

Conversion is triggered by a single CONVST falling edge, initiating synchronized hold and conversion across both channels. Data is accessed via a 14-bit parallel bus (DB0–DB13) using CS/RD handshaking, with BUSY indicating completion. The device supports Mode 1 (high-speed, 5.2 μs) and Mode 2 (auto-power-down, 10 μs) operation, consuming 45 mW typical in active mode and 105 μW max in sleep.

Key Specifications

Pinout & Package

AD7863AR-2REEL is housed in a 28-lead SOIC_W (Wide-body Small Outline Integrated Circuit) package, 17.9 mm × 7.5 mm body size, 1.27 mm lead pitch, RoHS-compliant, tape-and-reel format (REEL suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7863AR-2REEL, AD7656ASTZ offers greater channel density and resolution but demands more complex digital interfacing and external reference management, while ADS8556IPM provides faster sampling and wider input range at the cost of higher power and less stringent aperture matching - making AD7863AR-2REEL optimal for cost-sensitive, phase-critical 2-channel systems with unipolar sensor interfaces.

Availability

AD7863AR-2REEL is available at Aetrix Electronics and suitable for motor control feedback, power quality monitoring, and industrial data acquisition requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for AD7863AR-2REEL 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 AD7863 product line delivers dual-channel simultaneous-sampling ADCs optimized for real-time control and measurement systems where phase coherence, low power, and simple parallel interfacing are essential - targeting industrial automation, energy metering, and test equipment.

FAQ

What input voltage range does the AD7863AR-2REEL support?

The AD7863AR-2REEL supports a unipolar 0 V to 2.5 V analog input range, as specified for the AD7863-2 variant. This matches standard 2.5 V reference outputs and eliminates need for external level-shifting circuitry. Input overvoltage tolerance is +7 V absolute maximum, providing robustness against transients in industrial environments. The device uses straight (natural) binary output coding for this range.

How does simultaneous sampling work on the AD7863AR-2REEL?

AD7863AR-2REEL achieves true simultaneous sampling using two matched track-and-hold amplifiers that both enter hold mode on the same falling edge of the CONVST signal. This preserves phase relationships between VA1/VA2 or VB1/VB2 inputs with ≤350 ps aperture delay matching. Conversion proceeds in parallel, and results are read sequentially via the 14-bit bus - first access returns VA1/VB1, second returns VA2/VB2.

What is the conversion time and throughput capability of the AD7863AR-2REEL?

The AD7863AR-2REEL has a 5.2 μs conversion time in Mode 1 (high-speed), enabling a maximum throughput rate of 175 kSPS per channel. In Mode 2 (auto power-down), conversion time increases to 10.0 μs due to wake-up latency, reducing throughput but lowering average power to 105 μW max. Both modes maintain full 14-bit performance and simultaneous sampling integrity.

Does the AD7863AR-2REEL include an internal voltage reference?

Yes, the AD7863AR-2REEL integrates a 2.5 V internal reference with ±10 mV error at 25°C and a typical temperature coefficient of 25 ppm/°C. The VREF pin serves as both output and input - it can source the internal reference or accept an external 2.5 V reference. When using the internal reference, two 0.1 μF ceramic capacitors must be placed from VREF to AGND for stability.

What package type and pin count does the AD7863AR-2REEL use?

AD7863AR-2REEL is supplied in a 28-lead SOIC_W (Wide-body Small Outline IC) package, measuring 17.9 mm × 7.5 mm with 1.27 mm lead pitch. This RoHS-compliant, tape-and-reel format supports automated SMT assembly and provides adequate thermal dissipation (θ_JA = 71.4°C/W) for its 45 mW typical power dissipation in industrial ambient conditions.