Analog Devices Inc. AD7714YRUZ

Overview

AD7714YRUZ 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 delivers 0.0010% linearity error, <150 nV rms input noise, and operates from +2.7 V to +3.3 V or +4.75 V to +5.25 V across –40°C to +105°C - enabling high-precision signal conditioning in portable industrial instruments and loop-powered transducer interfaces.

For engineers reviewing the AD7714YRUZ datasheet, AD7714YRUZ pinout, AD7714YRUZ application, or AD7714YRUZ equivalent, key selection criteria include its 24-bit no-missing-codes performance at ≤60 Hz filter notch, Schmitt-triggered SCLK/DIN inputs for noisy environments, low 226 µA typical active current (4 µA in power-down), and TSSOP-24 package compatibility with space-constrained PCB layouts.

Technical Context

The AD7714YRUZ employs a charge-balancing sigma-delta modulator followed by a programmable first-notch digital low-pass filter, where notch frequency determines resolution/noise trade-off (e.g., 24-bit resolution at ≤60 Hz, 15-bit at 500 Hz). Its PGA supports gains of 1–128 across five analog inputs configurable as three differential or five pseudo-differential channels, with reference input range scaling from ±1.25 V (3 V supply) to ±2.5 V (5 V supply).

It features three-wire SPI™/QSPI™/MICROWIRE™/DSP-compatible serial interface, self- and system-calibration modes, read/write access to calibration coefficients, and Schmitt-trigger inputs on SCLK and DIN - critical for robust communication in industrial microcontroller-based systems operating under EMI-prone conditions.

Key Specifications

Pinout & Package

AD7714YRUZ is housed in a 24-lead Thin Shrink Small Outline Package (TSSOP), 0.25 mm pitch, 7.8 mm × 4.4 mm body size, with exposed thermal pad (EP) connected to AGND for optimal thermal performance in high-density layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7730BRUZ and ADS1248IPWR, AD7714YRUZ offers superior linearity (±0.0010% vs ±0.003%) and lowest active current (226 µA vs ≥350 µA), making it optimal for battery- or loop-powered applications demanding metrology-grade accuracy within tight thermal and spatial constraints.

Availability

AD7714YRUZ is available at Aetrix Electronics and suitable for portable industrial instruments, loop-powered transmitters, and high-reliability temperature monitoring systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD7714YRUZ 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, serving industrial, automotive, communications, and healthcare markets since 1965.

The AD7714 product line was designed specifically for low-frequency, high-accuracy sensor signal conditioning - targeting applications where resolution, linearity, and noise performance outweigh raw speed, such as precision weighing, pressure, and temperature measurement systems.

FAQ

What is the maximum recommended master clock frequency for AD7714YRUZ?

The AD7714YRUZ supports a master clock (MCLK IN) frequency up to 2.5 MHz for specified performance. Operating beyond this limit may degrade integral nonlinearity and increase output noise. At 2.4576 MHz, the device achieves optimal settling time and filter notch accuracy - commonly used to align with standard UART baud rates in host microcontrollers interfacing with AD7714YRUZ.

Does AD7714YRUZ support true differential input configurations?

Yes, AD7714YRUZ supports three fully differential input channels (e.g., AIN1–AIN2, AIN3–AIN4, AIN5–AIN6) via its internal switching matrix. Each pair can be configured as differential with programmable gain, enabling rejection of common-mode noise in noisy industrial environments - a key capability confirmed in the functional block diagram and "GENERAL DESCRIPTION" section of the datasheet.

How does the Schmitt trigger on SCLK and DIN improve AD7714YRUZ reliability?

The Schmitt trigger inputs on SCLK and DIN provide hysteresis (e.g., VT+ = 2.0 V / VT– = 1.1 V at 3 V DVDD), increasing noise immunity by rejecting slow-rising or electrically noisy clock/data edges. This prevents false triggering during EMI events in factory-floor or motor-drive adjacent installations - a documented Y-grade enhancement over standard AD7714 variants.

Can AD7714YRUZ operate with a 1.25 V reference when powered from 5 V AVDD?

No - AD7714YRUZ requires the reference voltage (REF IN+ – REF IN–) to scale with AVDD: ±1.25 V is specified only for 2.7–3.3 V AVDD operation, while ±2.5 V is required for 4.75–5.25 V AVDD. Using 1.25 V reference with 5 V AVDD violates the "REF IN Input Sampling Rate" and "Reference Input Range" specifications and risks degraded linearity and missing codes in AD7714YRUZ operation.

What calibration modes are available in AD7714YRUZ and how are they initiated?

AD7714YRUZ supports self-calibration (zero/full-scale), system calibration (using external known reference), and background calibration (continuous zero correction during normal operation). These are initiated via dedicated command bits in the Mode Register (e.g., CALIBRATE bit) and require no external hardware - all calibration coefficients are stored in on-chip registers accessible via the serial interface, as defined in the "SYSTEM CALIBRATION" section of the datasheet.