Analog Devices Inc. AD7862ARSZ-10REEL

Overview

AD7862ARSZ-10REEL from Analog Devices is a dual 12-bit simultaneous-sampling analog-to-digital converter (ADC) with four analog inputs grouped into two synchronized channels (A and B), ±10 V input range, 3.6 µs conversion time, and high-speed parallel interface. It preserves phase coherence between channels for AC motor control and power quality monitoring.

For engineers reviewing the AD7862ARSZ-10REEL datasheet, AD7862ARSZ-10REEL pinout, AD7862ARSZ-10REEL application, or AD7862ARSZ-10REEL equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in industrial data acquisition, and validated alternative parts with documented differences.

Technical Context

The AD7862ARSZ-10REEL integrates two independent 4 µs successive approximation ADCs, dual track-and-hold amplifiers with 20 ns aperture delay and 200 ps matching, and an internal +2.5 V reference buffered to 2 kΩ output impedance. Its CONVST-triggered synchronous sampling ensures sub-ns timing alignment across VA1/VA2 and VB1/VB2.

It operates from a single +5 V supply (±5%), consumes 60 mW typical in normal mode, and supports automatic power-down after conversion. The 12-bit parallel bus uses standard CS/RD control with A0 multiplexer select to sequence reads between channel pairs - no external clock required beyond CONVST.

Key Specifications

Pinout & Package

AD7862ARSZ-10REEL is housed in a 28-lead Shrink Small Outline Package (SSOP), RoHS-compliant, with 0.65 mm lead pitch and exposed pad for thermal management. Pin 1 is marked by notch or dot; pins 1 and 28 are NC (no connect).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7862ARSZ-10REEL, AD7863ARSZ-10 offers higher resolution with drop-in compatibility, while ADS8364IPAG trades parallel simplicity for channel count and resolution at the cost of interface redesign and external reference dependency.

Availability

AD7862ARSZ-10REEL is available at Aetrix Electronics and suitable for AC motor control, uninterruptible power supplies, and industrial data acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for AD7862ARSZ-10REEL 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 is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.

The AD7862ARSZ-10REEL belongs to Analog Devices' high-speed data acquisition product line, designed specifically for industrial automation systems demanding synchronized dual-channel sampling with robust ±10 V input handling and low-power operation.

FAQ

What is the maximum sampling rate supported by the AD7862ARSZ-10REEL?

The AD7862ARSZ-10REEL achieves a maximum throughput rate of 250 kSPS per channel. This is enabled by its 3.6 µs conversion time and 0.3 µs track/hold acquisition time. To sustain this rate, the read cycle must complete before the next CONVST pulse, respecting the t7 timing parameter (40 ns minimum between consecutive reads). The part's parallel interface and internal clock eliminate external timing dependencies, making it suitable for deterministic real-time control loops where AD7862ARSZ-10REEL delivers consistent latency.

Does the AD7862ARSZ-10REEL require an external reference voltage?

No, the AD7862ARSZ-10REEL includes an internal +2.5 V reference with ±10 mV accuracy at +25°C and ±25 mV over temperature. It is fully functional with only a 0.1 µF ceramic capacitor from VREF to AGND. However, the VREF pin can accept an external +2.5 V reference (e.g., AD780 or REF43) for improved stability or system-level reference synchronization - in which case the internal reference is overdriven. This flexibility allows AD7862ARSZ-10REEL to serve both cost-optimized and metrology-grade applications.

How does the AD7862ARSZ-10REEL handle simultaneous sampling across two channels?

The AD7862ARSZ-10REEL uses a single CONVST falling edge to place both on-chip track-and-hold amplifiers into hold mode simultaneously, ensuring identical aperture delay (20 ns typ) and matching (<200 ps) across VA1/VA2 and VB1/VB2. This hardware-synchronized sampling preserves relative phase information between channels - critical for vector math in motor control or power quality analysis. Conversion proceeds in parallel, and results are made available concurrently on the 12-bit bus, with A0 and RD controlling sequential access to each channel's pair of samples.

What package type is used for the AD7862ARSZ-10REEL?

The AD7862ARSZ-10REEL is packaged in a 28-lead Shrink Small Outline Package (SSOP), identified by the "RS" suffix in the ordering guide and confirmed by the "ARSZ" in the part number. It features a 0.65 mm lead pitch, gull-wing leads, and RoHS-compliant finish. This SSOP variant offers smaller footprint and better thermal performance than the SOIC (R-28) or DIP (N-28) alternatives, making AD7862ARSZ-10REEL ideal for space-constrained industrial PCBs where thermal dissipation must be managed without heatsinks.

Can the AD7862ARSZ-10REEL interface directly with a 3.3 V microcontroller?

The AD7862ARSZ-10REEL's digital interface operates at TTL levels (V_INH ≥ 2.4 V, V_INL ≤ 0.8 V) and is specified for V_DD = +5 V ±5%, so its outputs swing 0–4.0 V (V_OH) and 0–0.4 V (V_OL). Direct connection to a 3.3 V microcontroller is not recommended without level translation, as the 4.0 V high-level exceeds most 3.3 V I/O absolute maximum ratings. Use a bidirectional level shifter or series resistor + clamp diode network. AD7862ARSZ-10REEL's logic inputs tolerate up to V_DD + 0.3 V, but sustained 4.0 V on a 3.3 V rail risks damage or increased leakage.