Analog Devices Inc. AD7863ARSZ-10REEL7

Overview

AD7863ARSZ-10REEL7 from Analog Devices is a dual-channel, simultaneous-sampling 14-bit analog-to-digital converter (ADC) with 175 kSPS throughput per channel, 5.2 μs conversion time, ±10 V input range, 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 AD7863ARSZ-10REEL7 datasheet, AD7863ARSZ-10REEL7 pinout, AD7863ARSZ-10REEL7 application, or AD7863ARSZ-10REEL7 equivalent, key selection criteria include simultaneous sampling capability, aperture delay matching (<350 ps), channel-to-channel isolation (−86 dB), dual parallel read interface timing, and ±17 V overvoltage protection on analog inputs.

Technical Context

The AD7863ARSZ-10REEL7 integrates two independent successive approximation 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 effective conversion).

Input channels are grouped as VA1/VA2 (Channel A) and VB1/VB2 (Channel B), selected via A0; CONVST falling edge triggers simultaneous hold and conversion across both channels. Data output follows twos-complement coding, accessed via 14-bit parallel bus (DB0–DB13) with CS/RD handshaking and BUSY status indication.

Key Specifications

Pinout & Package

AD7863ARSZ-10REEL7 is housed in a 28-lead SOIC_W (Wide) package with 0.3 inch body width and standard gull-wing lead form. Pin pitch is 0.050 inch (1.27 mm); package meets JEDEC MS-013AC standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7863ARSZ-10REEL7, AD7656ASTZ offers higher resolution and more channels but demands external reference support and SPI firmware overhead, while ADS8556IPMR delivers faster sampling and integrated features at the cost of board space and power - making AD7863ARSZ-10REEL7 optimal for cost-sensitive, pin-constrained, 14-bit industrial DAQ upgrades.

Availability

AD7863ARSZ-10REEL7 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 assurance, and RoHS-compliant sourcing.

Supply support for AD7863ARSZ-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 belongs to Analog Devices' precision data acquisition IC family, engineered specifically for applications demanding phase-coherent multi-channel sampling, robust industrial interfacing, and low-power operation in harsh environments.

FAQ

What is the maximum analog input voltage the AD7863ARSZ-10REEL7 can tolerate without damage?

The AD7863ARSZ-10REEL7 provides ±17 V absolute maximum rating on all analog inputs (VA1, VA2, VB1, VB2), exceeding its ±10 V operational range. This overvoltage tolerance protects against transient surges in industrial field wiring and allows direct connection to unconditioned sensor outputs without external clamping diodes - a key reliability feature confirmed in the Absolute Maximum Ratings table (Page 6, Table 3).

How does the AD7863ARSZ-10REEL7 achieve simultaneous sampling across two channels?

The AD7863ARSZ-10REEL7 achieves true simultaneous sampling using two independent track-and-hold amplifiers, both triggered by the same falling edge of the CONVST signal. This architecture ensures identical aperture delay (<35 ps) and matching (<350 ps) between channels - preserving relative phase information critical for vector control and power analysis, as verified in the Dynamic Performance specifications (Page 3, Table 1).

Does the AD7863ARSZ-10REEL7 require an external reference voltage?

No, the AD7863ARSZ-10REEL7 includes an internal 2.5 V reference with ±10 mV accuracy at 25°C and ±20 mV over temperature - sufficient for most industrial applications. The VREF pin serves as both output and input; an external reference may be applied if tighter tolerance or lower drift is required, but it is not mandatory for basic operation per the General Description (Page 1) and Reference Section (Page 9).

What is the data read sequence after conversion completion on the AD7863ARSZ-10REEL7?

After BUSY goes low, the first RD pulse (with CS low) reads the result from VA1 (if A0 = low) or VB1 (if A0 = high); the second RD pulse reads VA2 or VB2 respectively. This two-pulse sequence is enforced by internal logic and documented in the Functional Block Diagram (Figure 1), Converter Details (Page 9), and Timing Diagram (Figure 2) - ensuring deterministic access to both channel results without address decoding.

Is the AD7863ARSZ-10REEL7 compatible with 3.3 V logic systems?

The AD7863ARSZ-10REEL7 is specified for 5 V logic (VINH ≥ 2.4 V, VINL ≤ 0.8 V) and draws VDD = 5 V ±5%. While its digital outputs meet TTL thresholds, direct interfacing with 3.3 V microcontrollers requires level translation or pull-up/pull-down networks to ensure reliable signaling - confirmed by Logic Input/Output specifications (Page 4, Table 1) and absence of 3.3 V I/O support in the datasheet.