Analog Devices Inc. AD7714ARS-5

Overview

AD7714ARS-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 3-wire SPI-compatible serial interface. It operates from a +4.75 V to +5.25 V AVDD 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 transducer signal conditioning in loop-powered systems.

For engineers reviewing the AD7714ARS-5 datasheet, AD7714ARS-5 pinout, AD7714ARS-5 application, or AD7714ARS-5 equivalent, key selection considerations include its 28-pin SSOP package, 5 V operation, 128× PGA gain range, programmable digital filter cutoffs, on-chip self/system/background calibration, and compatibility with microcontroller- or DSP-based embedded measurement systems requiring low-noise, low-power, multi-channel ADC front ends.

Technical Context

The AD7714ARS-5 employs a charge-balancing sigma-delta modulator with on-chip digital filtering, where the first notch frequency is software-programmable via control registers to adjust settling time and anti-aliasing rejection. Its analog front end includes a selectable buffer mode (BUF bit) and supports both unipolar (0 to +V_REF/GAIN) and bipolar (±V_REF/GAIN) input ranges.

It features three differential analog inputs configurable as five pseudo-differential channels, a dedicated differential reference input (REF IN(+) / REF IN(–)), and Schmitt-triggered logic inputs only on Y-grade variants - not applicable to the AD7714ARS-5 (A-grade, –40°C to +85°C). Clocking supports external MCLK IN (400 kHz–2.5 MHz) or crystal/resonator across MCLK pins.

Key Specifications

Pinout & Package

The AD7714ARS-5 is housed in a 28-lead shrink small outline package (SSOP), 0.209 inch body width, with exposed pad (no thermal pad connection specified), JEDEC MO-153 compliant. Pin pitch is 0.025 inch (0.635 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7718ARZ and ADS1258IPWR, the AD7714ARS-5 offers unique value in cost-sensitive, low-power industrial instruments where integrated PGA, burnout detection, and SSOP manufacturability outweigh channel count or speed requirements.

Availability

AD7714ARS-5 is available at Aetrix Electronics and suitable for portable industrial instruments, pressure transducers, and loop-powered systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant SSOP packaging.

Supply support for AD7714ARS-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, founded in 1965 and headquartered in Wilmington, MA.

The AD7714 product line was designed specifically for high-accuracy, low-frequency measurement applications - targeting industrial process control, instrumentation, and sensor signal conditioning where resolution, noise, and calibration integrity are critical.

FAQ

What is the maximum recommended master clock frequency for the AD7714ARS-5?

The AD7714ARS-5 supports a master clock frequency (MCLK IN) up to 2.5 MHz for guaranteed specifications. Operation above this limit may degrade noise performance and timing margins. At 2.4576 MHz, the device achieves optimal balance between conversion speed and filter settling - particularly important when using higher PGA gains (≥8), which require the BST bit to be set in the Filter High Register.

Does the AD7714ARS-5 support true differential input configurations?

Yes, the AD7714ARS-5 supports three fully differential input channels (AIN1/AIN2, AIN3/AIN4, AIN5/AIN6), each with independent programmable gain. These can also be reconfigured as five pseudo-differential inputs (AIN1–AIN5 referenced to AIN6). The differential topology provides superior common-mode noise rejection - up to 150 dB at 50/60 Hz - making the AD7714ARS-5 well-suited for noisy industrial environments.

Can the AD7714ARS-5 operate with a 2.5 V reference voltage?

Yes, the AD7714ARS-5 is specified for use with a +2.5 V reference (REF IN(+) – REF IN(–)) when operating from a +5 V AVDD supply. This reference voltage must be stable within ±1% for full performance. The AD7714ARS-5 uses this reference to define full-scale input range - e.g., ±2.5 V/GAIN in bipolar mode - enabling precise ratiometric measurements when paired with bridge sensors excited from the same supply.

How does the AD7714ARS-5 handle calibration in production environments?

The AD7714ARS-5 supports self-calibration (zero and full-scale), system calibration (using known external references), and background calibration (continuous zero-scale correction during normal operation). All calibration coefficients are stored in on-chip registers and can be read/written via the serial interface - eliminating need for external EEPROM or host MCU storage. This simplifies production test flow and field recalibration for the AD7714ARS-5.

Is the AD7714ARS-5 pin-compatible with other AD7714 variants like AD7714AR-5 or AD7714AN-5?

No - the AD7714ARS-5 uses a 28-lead SSOP package (RS-28), whereas AD7714AR-5 is in a 24-lead SOIC (R-24) and AD7714AN-5 is in a 24-lead PDIP (N-24). While functionally identical and sharing the same register map and electrical behavior, the AD7714ARS-5 requires a different PCB footprint and layout. Mechanical compatibility is not provided across these packages.