Analog Devices Inc. AD7714ARZ-5

Overview

AD7714ARZ-5 from Analog Devices is a 24-bit sigma-delta analog-to-digital converter (ADC) with integrated programmable-gain amplifier (PGA), five-channel pseudo-differential or three-channel fully differential input architecture, and on-chip digital filtering. It operates from a +4.75 V to +5.25 V analog supply and delivers ±0.0015% integral nonlinearity, <150 nV_rms noise, and 24-bit no-missing-codes performance at filter notches ≤60 Hz - ideal for high-precision industrial sensor signal conditioning in loop-powered systems.

For engineers reviewing the AD7714ARZ-5 datasheet, AD7714ARZ-5 pinout, AD7714ARZ-5 application, or AD7714ARZ-5 equivalent, this page provides verified technical context, real-world design implications of its charge-balancing architecture, calibrated offset/full-scale drift behavior, SPI/QSPI/MICROWIRE-compatible serial interface timing, and validated alternatives for transducer interface redesigns requiring 24-bit resolution and low-power operation.

Technical Context

The AD7714ARZ-5 employs a sigma-delta modulator with on-chip digital filter featuring programmable first-notch cutoff (10 Hz–1 kHz), enabling precise rejection of 50/60 Hz line interference. Its front-end supports gain settings from 1 to 128 across five pseudo-differential or three fully differential analog inputs, with reference input range fixed at +2.5 V (±1%).

It uses a charge-balancing ADC architecture with self-, system-, and background calibration modes, eliminating zero-scale and full-scale errors over temperature. The device features Schmitt-triggered SCLK/DIN inputs only in Y-grade variants; the AD7714ARZ-5 (A-grade) uses standard CMOS logic thresholds and operates from –40°C to +85°C.

Key Specifications

Pinout & Package

AD7714ARZ-5 is housed in a 24-lead SOIC (R-24) package with 0.3-inch body width and standard 0.050-inch lead pitch. Pin functions are defined per Analog Devices AD7714 datasheet Rev. C, Table VII and Functional Block Diagram.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-resolution sigma-delta ADC applications.

Compared with AD7714ARZ-5, AD7730BRUZ adds diagnostic capability at lower update rates, while ADS1258IPWR trades integrated filtering and PGA for speed and channel density - making AD7714ARZ-5 optimal for cost-sensitive, low-power, single-sensor industrial nodes needing embedded signal conditioning.

Availability

AD7714ARZ-5 is available at Aetrix Electronics and suitable for portable industrial instruments, loop-powered transmitters, and pressure sensor signal conditioning requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for AD7714ARZ-5 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 Wilmington, MA.

The AD7714 belongs to Analog Devices' precision sigma-delta ADC product line, designed specifically for low-frequency industrial measurement applications requiring high resolution, low noise, and integrated signal conditioning - targeting smart sensors, weigh scales, and process control systems.

FAQ

What is the maximum recommended reference voltage for AD7714ARZ-5?

The AD7714ARZ-5 specifies +2.5 V (±1%) as the nominal reference input voltage (REF IN(+) – REF IN(–)) for guaranteed performance. While functional at lower voltages, deviation beyond ±1% may impact integral nonlinearity and noise specifications. The device does not support programmable reference scaling - external reference stability directly determines absolute measurement accuracy in AD7714ARZ-5 systems.

Does AD7714ARZ-5 support true differential input mode across all six analog pins?

No. AD7714ARZ-5 supports three fully differential input pairs (e.g., AIN1+/AIN1−, AIN2+/AIN2−, AIN3+/AIN3−) or five pseudo-differential inputs (e.g., AIN1+ referenced to AIN1−, AIN2+ to AIN2−, etc.), as defined by its internal switching matrix. AIN4–AIN6 are not independent differential terminals - they share common connections and cannot form additional isolated differential pairs beyond the three designated.

Can AD7714ARZ-5 operate with a 3.3 V digital supply while using 5 V analog rails?

Yes. AD7714ARZ-5 supports mixed-supply operation: AVDD = +4.75 V to +5.25 V and DVDD = +3.0 V to +5.25 V. When DVDD = 3.3 V, logic thresholds adjust accordingly (VINH ≥ 2.0 V, VINL ≤ 0.4 V), and output drive strength is rated for ISOURCE = 100 µA / ISINK = 100 µA. This configuration is explicitly validated in the AD7714-5 datasheet section "LOGIC INPUTS/OUTPUTS".

How does the AD7714ARZ-5 handle power-down mode, and what is the typical current draw?

AD7714ARZ-5 enters standby mode via the MODE register's PD bit, reducing total supply current to 40 µA max (typically 20 µA at +5 V). In this state, the modulator and digital filter halt, but register contents and calibration coefficients are retained. External clock must be stopped or driven low to achieve minimum current; if MCLK remains active, standby current rises to ~150 µA typical - a key design consideration for battery-operated AD7714ARZ-5 applications.

Is the AD7714ARZ-5 pin-compatible with other AD7714 variants like AD7714AR-3 or AD7714YRU?

No. AD7714ARZ-5 (SOIC-24) shares the same 24-pin SOIC footprint as AD7714AR-3 and AD7714AR-5, but is not pin-compatible with AD7714YRU (24-lead TSSOP) due to differing package dimensions and lead pitch. Electrical pin functions match across R-24 variants, but Y-grade parts include Schmitt triggers on SCLK/DIN - a functional difference requiring PCB-level verification even when packages align.