Analog Devices Inc. AD7863ARSZ-10

Overview

AD7863ARSZ-10 from Analog Devices is a dual-channel, simultaneous-sampling 14-bit analog-to-digital converter (ADC) with ±10 V input range, 5.2 μs conversion time, and single 5 V supply operation. It integrates two track/hold amplifiers, internal 2.5 V reference, and high-speed parallel interface-designed for phase-critical applications such as motor control feedback and power quality monitoring.

For engineers reviewing the AD7863ARSZ-10 datasheet, AD7863ARSZ-10 pinout, AD7863ARSZ-10 application, or AD7863ARSZ-10 equivalent, key selection criteria include simultaneous sampling capability, aperture delay matching (<350 ps), channel isolation (−86 dB), SNR (77 dB min), and ±10 V industrial input range compliance.

Technical Context

The AD7863ARSZ-10 implements two independent successive approximation register (SAR) ADCs sharing a common CONVST trigger to enforce strict simultaneity. Each channel (A/B) contains two analog inputs (VA1/VA2 or VB1/VB2) selected via A0, enabling synchronized acquisition across four total inputs while preserving inter-channel phase relationships.

Its internal 2.5 V reference drives both ADCs with ±10 mV error at 25°C and 25 ppm/°C drift; overvoltage protection allows ±17 V transient tolerance on analog inputs. The device operates in Mode 1 (high-speed, 175 kSPS) or Mode 2 (auto-power-down), achieving 70 mW typical dissipation and 105 μW max standby power.

Key Specifications

Pinout & Package

AD7863ARSZ-10 is housed in a 28-lead SOIC_W (Wide) package with 0.3" body width and standard gull-wing lead form factor, suitable for automated SMT assembly and industrial PCB layouts requiring thermal robustness.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7863ARSZ-10, AD7656ASTZ offers higher resolution at the cost of serial interface complexity and reduced aperture matching control, while ADS8556IPMR delivers faster conversion and more channels but demands additional power rails and external transient protection-making AD7863ARSZ-10 optimal for cost-sensitive, single-supply industrial systems requiring guaranteed phase coherence.

Availability

AD7863ARSZ-10 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 RoHS-compliant sourcing.

Supply support for AD7863ARSZ-10 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 R&D and manufacturing facilities worldwide.

The AD7863 belongs to Analog Devices' precision data acquisition product line, engineered specifically for industrial automation and real-time control systems demanding synchronized multi-channel sampling and robust operation in harsh electrical environments.

FAQ

What is the maximum sampling rate supported by the AD7863ARSZ-10?

The AD7863ARSZ-10 achieves a maximum sustained sampling rate of 175 kSPS per channel in Mode 1 (high-speed mode), enabled by its 5.2 μs conversion time and deterministic BUSY-driven read protocol. This rate assumes proper timing margins-including 400 ns quiet time before next CONVST-and is validated across the full −40°C to +85°C temperature range. The device does not support oversampling or decimation modes beyond this specification.

Does the AD7863ARSZ-10 require an external reference voltage?

No, the AD7863ARSZ-10 includes an internal 2.5 V reference with ±10 mV error at 25°C and 25 ppm/°C temperature coefficient, fully sufficient for its ±10 V input range and specified DC accuracy. External reference use is optional and only recommended when tighter initial tolerance (<±1 mV) or lower drift (<5 ppm/°C) is required-such as in metrology-grade instrumentation. When using the internal reference, two 0.1 μF ceramic capacitors must be placed from VREF to AGND.

How does the AD7863ARSZ-10 handle simultaneous sampling across its two channels?

The AD7863ARSZ-10 uses a single CONVST input to trigger both on-chip track/hold amplifiers simultaneously on its falling edge, ensuring identical aperture delay (<35 ps device-to-device variation) and sub-350 ps matching between channels. This hardware-enforced simultaneity preserves relative phase information between VA1/VA2 or VB1/VB2 pairs-critical for vector calculations in motor control and power analytics-without requiring external synchronization circuitry or software compensation.

What is the overvoltage tolerance on the analog inputs of the AD7863ARSZ-10?

The AD7863ARSZ-10 analog inputs (VA1, VA2, VB1, VB2) tolerate up to ±17 V continuously without damage or parametric shift, exceeding its ±10 V full-scale range. This is achieved via integrated input clamping diodes and series resistance, allowing direct connection to industrial sensors exposed to load dump, ESD, or wiring faults. Operation outside ±10 V invalidates accuracy specifications but maintains functional integrity up to the absolute maximum rating.

Can the AD7863ARSZ-10 interface directly with a microcontroller without level-shifting?

Yes, the AD7863ARSZ-10 features TTL-compatible parallel outputs (DB0–DB13, CS, RD, BUSY) with VOH ≥ 4.0 V and VOL ≤ 0.4 V under specified loads, matching standard 5 V microcontrollers (e.g., legacy 8051, PIC18, or ARM Cortex-M3/M4 with 5 V tolerant GPIO). No level-shifting is required when VDD = 5 V ± 5%, and all digital inputs meet VIH ≥ 2.4 V and VIL ≤ 0.8 V thresholds per the datasheet.