Analog Devices Inc. AD7863ARS-10REEL7

Overview

AD7863ARS-10REEL7 from Analog Devices is a dual-channel, simultaneous-sampling 14-bit analog-to-digital converter (ADC) with 175 kSPS throughput per channel, ±10 V input range, 5.2 μs conversion time, and internal 2.5 V reference - designed for precision phase-coherent acquisition in motor control, power quality monitoring, and industrial data acquisition systems.

For engineers reviewing the AD7863ARS-10REEL7 datasheet, AD7863ARS-10REEL7 pinout, AD7863ARS-10REEL7 application, or AD7863ARS-10REEL7 equivalent, key selection criteria include simultaneous sampling capability, aperture delay matching (<350 ps), channel-to-channel isolation (−86 dB), dual 14-bit resolution, and SOIC_W 28-lead packaging compatible with high-density PCB layouts.

Technical Context

The AD7863ARS-10REEL7 integrates two independent successive approximation register (SAR) ADCs, each paired with a track-and-hold amplifier and sharing a single internal 2.5 V reference. It uses a laser-trimmed internal clock oscillator and supports two operating modes: high-speed Mode 1 (5.2 μs conversion) and auto-sleep Mode 2 (10.0 μs including wake-up).

Its four analog inputs (VA1/VA2/VB1/VB2) are grouped into two selectable channels (A/B via A0), enabling true simultaneous sampling to preserve inter-channel phase relationships. The parallel 14-bit TTL-compatible interface (DB0–DB13, CS, RD, CONVST, BUSY) ensures deterministic timing with 30 ns data access time and 5 ns bus relinquish time.

Key Specifications

Pinout & Package

AD7863ARS-10REEL7 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 pitch, RoHS-compliant, tape-and-reel format (REEL7 = 7-inch reel).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7863ARS-10REEL7, AD7656ASTZ offers higher resolution but lacks true simultaneous dual-channel sampling and native parallel interface, while ADS8556IPM provides greater channel count and integrated reference at the cost of increased package size and power - making AD7863ARS-10REEL7 optimal for compact, low-power, phase-critical dual-input applications.

Availability

AD7863ARS-10REEL7 is available at Aetrix Electronics and suitable for motor control systems, power quality analyzers, industrial PLC analog input modules, and medical ultrasound beamforming requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for AD7863ARS-10REEL7 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 centers worldwide.

The AD7863 product line delivers high-speed, low-power, simultaneous-sampling ADCs for applications demanding precise inter-channel timing - especially in industrial automation, energy metering, and test instrumentation.

FAQ

What is the maximum analog input voltage the AD7863ARS-10REEL7 can withstand without damage?

The AD7863ARS-10REEL7 features robust overvoltage protection on all analog inputs (VA1, VA2, VB1, VB2), allowing continuous exposure to ±17 V relative to AGND. This exceeds its specified ±10 V input range and protects against transients, sensor disconnection, or ESD events - eliminating need for external clamping diodes in most industrial environments. The protection remains effective across the full −40°C to +85°C operating temperature range.

Does the AD7863ARS-10REEL7 require an external reference, or does it include one internally?

The AD7863ARS-10REEL7 includes a fully integrated, buffered 2.5 V reference accessible via the VREF pin. It is specified with ±10 mV error at 25°C and ±20 mV over temperature, with 25 ppm/°C typical drift. While external references can be used for tighter accuracy, the internal reference enables immediate operation with only two 0.1 μF ceramic capacitors to AGND - simplifying layout and reducing BOM count for AD7863ARS-10REEL7-based designs.

How does the AD7863ARS-10REEL7 achieve simultaneous sampling across two channels?

The AD7863ARS-10REEL7 achieves true simultaneous sampling using two independent, matched track-and-hold amplifiers - one for each channel pair (A or B). A single CONVST falling edge triggers both amplifiers to enter hold mode at precisely the same instant. Aperture delay matching is guaranteed ≤350 ps, ensuring phase alignment better than 0.1° at 1 kHz - critical for vector control and power measurement. This architecture is intrinsic to the AD7863ARS-10REEL7 die and requires no external synchronization.

What are the power consumption characteristics of the AD7863ARS-10REEL7 in active and power-down modes?

In normal Mode 1 operation, the AD7863ARS-10REEL7 draws 18 mA max (94.5 mW at 5.25 V), with 70 mW typical. In Mode 2 (auto-sleep), it reduces supply current to 20 μA max (105 μW at 5.25 V) after conversion completes. The 40 nA typical current in power-down reflects core logic leakage - verified with decoupling capacitors removed per datasheet characterization. This dual-mode operation makes AD7863ARS-10REEL7 suitable for battery-powered portable instruments without sacrificing speed.

Can the AD7863ARS-10REEL7 interface directly with common microcontrollers like the STM32 or C2000 series?

Yes - the AD7863ARS-10REEL7's 14-bit parallel TTL interface (CS, RD, BUSY, DB0–DB13) is compatible with general-purpose GPIO banks on STM32H7, TMS320F2837x, and similar MCUs. Its 30 ns data access time and 5 ns bus relinquish time meet timing requirements for 20+ MHz bus clocks. Application notes confirm direct interfacing with ADSP-2100, TMS320C25, and MC68000 families - confirming AD7863ARS-10REEL7's suitability for real-time embedded control without glue logic.