Analog Devices Inc. AD7884APZ-REEL

Overview

AD7884APZ-REEL from Analog Devices is a 16-bit monolithic sampling analog-to-digital converter with internal sample-and-hold, 5.3 µs conversion time, ±5 V or ±3 V input range, and 166 kSPS throughput. It operates from ±5 V supplies with a 3 V reference and delivers 84 dB SNR in ±5 V input mode, targeting high-accuracy data acquisition in industrial control systems.

For engineers reviewing the AD7884APZ-REEL datasheet, AD7884APZ-REEL pinout, AD7884APZ-REEL application, or AD7884APZ-REEL equivalent, key selection criteria include its 16-bit twos-complement parallel output, bipolar zero error of ±0.15% FSR max, integral nonlinearity of ±0.0075% FSR max, and compatibility with ±5 V/±3 V analog signal conditioning topologies.

Technical Context

The AD7884APZ-REEL implements a two-pass flash architecture: first pass captures 9 MSBs via a 9-bit ADC and feeds them to an on-chip 16-bit DAC; second pass digitizes the residue error amplified by a dedicated residue amplifier. This enables 16-bit resolution at 166 kSPS while maintaining ±0.0075% FSR INL and 84 dB SNR.

It features independent analog and digital power domains (AVDD/AVSS, VDD/VSS), dual ground return paths (AGNDS/AGNDF for analog core, DGND for logic), and programmable input ranges selected via external pin tie-offs (±5VINF/±5VINS or ±3VINF/±3VINS). Conversion is initiated asynchronously by CONVST, with BUSY signaling completion.

Key Specifications

Pinout & Package

The AD7884APZ-REEL is housed in a 44-lead plastic leaded chip carrier (PLCC) package with gull-wing leads, RoHS-compliant and moisture-sensitive level 3 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed 16-bit ADC applications.

Compared with AD7884APZ-REEL, AD7682BCPZ-RL7 eliminates negative supply complexity but sacrifices built-in ±3 V input flexibility; ADS8860IPWR offers higher throughput and lower power but demands external signal conditioning for industrial ±5 V sensor interfaces.

Availability

AD7884APZ-REEL is available at Aetrix Electronics and suitable for industrial process monitoring, medical diagnostic equipment, and automated test equipment requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant PLCC packaging.

Supply support for AD7884APZ-REEL 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.

The AD7884APZ-REEL belongs to Analog Devices' precision high-speed ADC product line, engineered for applications demanding 16-bit resolution, sub-µs conversion, and robust dc accuracy in harsh industrial and medical environments.

FAQ

What is the maximum sampling rate supported by the AD7884APZ-REEL?

The AD7884APZ-REEL supports a maximum throughput rate of 166 kSPS, achieved through overlapping acquisition and conversion phases enabled by its two-pass flash architecture. This rate is guaranteed under specified conditions: VDD = +5 V ±5%, VSS = –5 V ±5%, VREF+S = 3 V, and fSAMPLE = 166 kHz. The 5.3 µs conversion time and 2.5 µs acquisition time allow this sustained rate without dead time between samples.

Does the AD7884APZ-REEL require an external clock source?

No, the AD7884APZ-REEL does not require an external clock source. It incorporates an internal oscillator that controls the conversion timing, eliminating the need for external clock generation circuitry. Conversion is initiated solely by the asynchronous CONVST signal, and BUSY indicates completion. This simplifies system design and improves timing predictability in noise-sensitive environments.

How is the ±3 V input range configured on the AD7884APZ-REEL?

The ±3 V input range on the AD7884APZ-REEL is configured by connecting ±3VINF and ±3VINS to the analog signal source while tying ±5VINF and ±5VINS to AGND. The internal resistor network (R1–R8) then provides appropriate gain and level-shifting to map the ±3 V input to the 0 V to –3 V range required by the 9-bit ADC core. This configuration is detailed in Figure 11 of the AD7884/AD7885 datasheet Rev. E.

What are the power supply sequencing requirements for the AD7884APZ-REEL?

For the AD7884APZ-REEL, AVSS must be powered up before or simultaneously with VSS to prevent latch-up or damage; AVDD and VDD should rise simultaneously due to their internal 17 Ω substrate connection. If separate ±5 V supplies are used, Schottky diodes (e.g., HP5082-2810) are recommended between AVSS and VSS to enforce correct sequencing. Failure to observe this may degrade dc accuracy or cause permanent damage.

Can the AD7884APZ-REEL operate with a single +5 V supply?

No, the AD7884APZ-REEL cannot operate with a single +5 V supply. It requires dual ±5 V analog and digital supplies (VDD = +5 V, VSS = –5 V, AVDD = +5 V, AVSS = –5 V) to bias its internal sample-and-hold amplifier, residue amplifier, and 9-bit ADC core. Attempting operation with only +5 V will result in functional failure, as the analog input stage and reference circuitry depend on the negative rail for proper common-mode range and biasing.