Analog Devices Inc. AD7863AR-10REEL7

Overview

AD7863AR-10REEL7 from Analog Devices is a dual-channel, simultaneous-sampling 14-bit analog-to-digital converter 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 precision phase-coherent acquisition in motor control, power quality monitoring, and digital oscilloscope front-ends.

For engineers reviewing the AD7863AR-10REEL7 datasheet, AD7863AR-10REEL7 pinout, AD7863AR-10REEL7 application, or AD7863AR-10REEL7 equivalent, key selection criteria include simultaneous dual-channel sampling capability, aperture delay matching ≤350 ps, ±10 V overvoltage tolerance (±17 V), 77 dB SNR at 175 kSPS, and SOIC_W 28-lead package compatibility with industrial signal conditioning systems.

Technical Context

The AD7863AR-10REEL7 implements two independent successive approximation register (SAR) ADCs sharing a common CONVST trigger and BUSY status signal, enabling true simultaneous sampling of VA1/VA2 or VB1/VB2 pairs. Its internal 2.5 V reference drives both ADCs, and input scaling circuitry supports ±10 V full-scale with 9 kΩ input resistance.

Conversion control uses edge-triggered logic: falling edge of CONVST initiates hold and conversion; BUSY goes high and remains asserted for 5.2 μs; data is read via 14-bit parallel bus using CS/RD strobes, with first read returning VA1/VB1 and second read returning VA2/VB2 depending on A0 state.

Key Specifications

Pinout & Package

AD7863AR-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 = 1000-piece reel).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7863AR-10REEL7, AD7656ASTZ trades parallel simplicity for higher resolution and channel count at the cost of added interface complexity, while ADS8588SIPM delivers greater speed and integration but demands more board area and power - making AD7863AR-10REEL7 optimal for compact, cost-sensitive dual-channel industrial acquisition where 14-bit/175 kSPS meets specification.

Availability

AD7863AR-10REEL7 is available at Aetrix Electronics and suitable for motor control systems, power quality analyzers, digital oscilloscope modules, and industrial PLC analog input cards requiring stable component supply and long-term obsolescence management.

Supply support for AD7863AR-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 and ISO 9001-certified manufacturing.

The AD7863 product line was developed for high-accuracy, phase-coherent data acquisition in industrial automation and instrumentation - emphasizing simultaneous sampling, robust input protection, and single-supply operation in compact packages.

FAQ

What is the maximum sampling rate supported by the AD7863AR-10REEL7?

The AD7863AR-10REEL7 achieves a maximum sustained sampling rate of 175 kSPS per channel in Mode 1 (high-speed mode), with 5.2 μs conversion time. This rate assumes proper timing adherence - including 400 ns quiet time before each CONVST pulse and correct CS/RD sequencing - and is validated under VDD = 5 V ±5%, T_A = −40°C to +85°C, and f_IN = 80 kHz conditions per the Rev. B datasheet.

Does the AD7863AR-10REEL7 require an external reference voltage?

No, the AD7863AR-10REEL7 includes an internal 2.5 V reference accessible at the VREF pin, specified with ±10 mV error at 25°C and ±20 mV over temperature. External reference use is optional and only recommended when tighter initial accuracy or lower temperature drift is required; the internal reference eliminates BOM cost and layout complexity in most industrial applications.

How does the A0 pin determine which analog channels are sampled on the AD7863AR-10REEL7?

The A0 pin is sampled at the falling edge of CONVST to select between two simultaneous-sampling pairs: when A0 is low, VA1 and VA2 are acquired; when A0 is high, VB1 and VB2 are acquired. This multiplexer control is static per conversion cycle and does not affect timing - both selected inputs are held and converted concurrently, preserving relative phase information critical for vector measurements.

What is the purpose of the BUSY signal on the AD7863AR-10REEL7?

The BUSY signal on the AD7863AR-10REEL7 is an active-high, open-drain output that asserts for exactly 5.2 μs following the falling edge of CONVST, indicating ongoing conversion. It provides hardware handshaking to prevent premature data reads and ensures the host processor accesses valid results only after conversion completion - eliminating software polling delays and guaranteeing deterministic timing in real-time systems.

Can the AD7863AR-10REEL7 operate from a single 3.3 V supply?

No, the AD7863AR-10REEL7 requires a nominal 5 V ±5% supply (VDD = 4.75 V to 5.25 V) as specified in the Absolute Maximum Ratings and DC Accuracy tables. Operation outside this range violates the device's design envelope and invalidates all performance specifications, including SNR, THD, and linearity. For 3.3 V systems, level-shifting or dedicated 5 V supply rail is mandatory.