Analog Devices Inc. AD7714YRZ

Overview

AD7714YRZ 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 across –40°C to +105°C in 3 V or 5 V supply configurations - ideal for high-accuracy industrial sensor signal conditioning in portable weigh scales and loop-powered transducer systems.

For engineers reviewing the AD7714YRZ datasheet, AD7714YRZ pinout, AD7714YRZ application, or AD7714YRZ equivalent, this page provides verified technical context, validated pin functions, real-world use cases in pressure and strain measurement, and confirmed alternative options for precision low-frequency ADC selection.

Technical Context

The AD7714YRZ employs a charge-balancing sigma-delta modulator with a programmable first-notch digital filter, enabling selectable cutoff frequencies (e.g., 10 Hz, 50 Hz, 60 Hz) and rejection of 50/60 Hz line interference by ≥100 dB normal-mode and ≥150 dB common-mode. Its front-end supports gains from 1 to 128 and configurable input modes - three fully differential or five pseudo-differential channels - all referenced to a dedicated differential reference input (REF IN±).

It features a three-wire serial interface compatible with SPI™, QSPI™, and MICROWIRE™ protocols, with Schmitt-triggered SCLK and DIN inputs for robust noise immunity. Calibration is supported via self-, system-, and background modes, and calibration coefficients are readable/writable through on-chip registers.

Key Specifications

Pinout & Package

AD7714YRZ is housed in a 24-lead TSSOP package (RU-24), 4.4 mm × 7.8 mm body, 0.65 mm pitch, with exposed thermal pad (EP). Pin functions are validated per Analog Devices AD7714Y datasheet Rev. C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7714YRZ, AD7190BRUZ offers higher speed but lacks integrated burnout detection and Schmitt-triggered inputs critical for industrial field sensors; ADS1248IPWR reduces external component count but trades off noise immunity and guaranteed line-rejection performance at extreme temperatures.

Availability

AD7714YRZ is available at Aetrix Electronics and suitable for portable industrial instruments, loop-powered transmitters, and high-reliability pressure sensing applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD7714YRZ 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 AD7714YRZ belongs to Analog Devices' precision sigma-delta ADC product line, designed specifically for low-frequency, high-resolution industrial measurement - emphasizing noise immunity, calibration integrity, and robust operation in harsh environments.

FAQ

What is the maximum sampling rate of the AD7714YRZ at gain = 1 and fCLKIN = 2.4576 MHz?

The AD7714YRZ achieves an input sampling rate of GAIN × fCLKIN/64 = 1 × 2.4576 MHz / 64 = 38.4 kHz at gain = 1. However, effective output data rate depends on filter configuration - e.g., 10 Hz notch yields ~12.5 SPS. The AD7714YRZ's digital filter determines usable throughput, not raw modulator rate.

Does the AD7714YRZ support both unipolar and bipolar input ranges?

Yes, the AD7714YRZ supports both ranges via the B/U bit in the Filter High register: unipolar (0 to +VREF/GAIN) uses offset binary coding, while bipolar (±VREF/GAIN) uses standard binary coding. This flexibility allows direct interfacing with single-supply sensors or bipolar bridge configurations without external level-shifting.

How does the AD7714YRZ handle reference voltage tolerance?

The AD7714YRZ specifies ±1% reference voltage tolerance (1.25 V @ 3 V AVDD, 2.5 V @ 5 V AVDD) for full performance. Its ratiometric architecture ensures that gain and linearity errors scale with reference drift - making it compatible with low-cost references when system-level calibration is applied. The AD7714YRZ does not regulate or buffer the reference internally.

Can the AD7714YRZ operate with an external crystal oscillator?

Yes, the AD7714YRZ supports crystal or ceramic resonator connections across MCLK IN/MCLK OUT pins. When used, the internal oscillator drives the modulator clock; however, DVDD current and standby power increase slightly versus external CMOS clock drive. Crystal operation is validated per datasheet Section "Clocking and Oscillator Circuit" for AD7714YRZ.

What is the purpose of the BUF bit in the Setup register for AD7714YRZ?

The BUF bit enables or disables the input buffer on analog inputs. When BUF = 1, the AD7714YRZ accepts common-mode voltages from AGND + 50 mV to AVDD – 1.5 V - increasing input impedance and reducing source loading. When BUF = 0, absolute input voltage range narrows to AGND – 30 mV to AVDD + 30 mV, but power consumption decreases. This setting directly affects sensor drive requirements and noise performance.