AD7714

PRODUCTION

CMOS, 3V/5V, 500 µA, 24-Bit Sigma-Delta, Signal Conditioning ADC

Data Sheet (Rev. C) Product Selection Table
Viewing:

Overview

  • Charge Balancing ADC
    24 Bits No Missing Codes
    0.0015% Nonlinearity
  • Five-Channel Programmable Gain Front End
    Gains from 1 to 128
    Can Be Configured as Three Fully Differential
    Inputs or Five Pseudo-Differential Inputs
  • Three-Wire Serial Interface
    SPI®, QSPI™, MICROWIRE™ and DSP Compatible
  • 3 V (AD7714-3) or 5 V (AD7714-5) Operation
  • Low Current (350 µA typ) with Power-Down (5 µA typ)
  • Low Noise (<150 nV rms)
  • Low-Pass Filter with Programmable Filter Cutoffs
  • Please see data sheet for additional features

The AD7714 is a complete analog front end for low-frequency measurement applications. The device accepts low level signals directly from a transducer and outputs a serial digital word. It employs a sigma-delta conversion technique to realize up to 24 bits of no missing codes performance. The input signal is applied to a proprietary programmable gain front end based around an analog modulator. The modulator output is processed by an on-chip digital filter. The first notch of this digital filter can be programmed via the on-chip control register allowing adjustment of the filter cutoff and settling time.

The part features three differential analog inputs (which can also be configured as five pseudo-differential analog inputs) as well as a differential reference input. The AD7714 thus performs all signal conditioning and conversion for a system consisting of up to five channels. A new Y grade has recently been added to the existing range. Compared to the A grades this new grade has an extended operating temperature range, schmitt trigger inputs on SCLK and DIN, tighter linearity specifications, lower power consumption and is available in a smaller package.

The AD7714 is ideal for use in smart microcontroller- or DSP-based systems. It features a serial interface that can be configured for three-wire operation. Gain settings, signal polarity and channel selection can be configured in software using the serial port. The AD7714 provides self-calibration, system calibration and background calibration options and also allows the user to read and write the on-chip calibration registers.

CMOS construction ensures very low power dissipation, and the power-down mode reduces the standby power consumption to 15 µW typical at 3 V. Minimum operating voltage for the A grades is 3 V and 2.7 V for the Y grades. The A grades are available in a 24-pin, 0.3 inch-wide, plastic dual-in-line package (DIP); a 24 lead small outline (SOIC) package and a 28-lead shrink small outline package (SSOP). The new Y grade is available in a 24-pin, 0.3 inch-wide, plastic dual-in-line package (DIP); a 24 lead small outline (SOIC) package and a 24-lead Thin Shrink Small Outline Package (TSSOP).

AD7714
CMOS, 3V/5V, 500 µA, 24-Bit Sigma-Delta, Signal Conditioning ADC
AD7714 Functional Block Diagram
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project
Ask a Question

Documentation

Data Sheet 1

User Guide 1

Application Note 9

Technical Articles 4

Frequently Asked Question 1

Learn More
Add to myAnalog

Add media to the Resources section of myAnalog, to an existing project or to a new project.

Create New Project

Software Resources

AD7714 Code Examples 1

Hardware Ecosystem

Parts Product Life Cycle Description
Interface Transceivers & Isolators 9
ADUM4160
PRODUCTION Full/Low Speed USB Digital Isolator
ADUM7440
PRODUCTION 1 kV RMS Quad-Channel Digital Isolator
ADUM7441
PRODUCTION 1 kV RMS Quad-Channel Digital Isolator
ADUM7442
PRODUCTION 1 kV RMS Quad-Channel Digital Isolator
ADUM5401
PRODUCTION Quad-Channel, 2.5 kV Isolators with Integrated DC-to-DC Converter (3/1 channel directionality)
ADUM5402
PRODUCTION Quad-Channel, 2.5 kV Isolators with Integrated DC-to-DC Converter (2/2 channel directionality)
ADUM5403
PRODUCTION Quad-Channel, 2.5 kV Isolators with Integrated DC-to-DC Converter (1/3 channel directionality)
ADUM1400
PRODUCTION Quad-Channel Digital Isolator (4/0 Channel Directionality)
ADUM1200
PRODUCTION Dual-Channel Digital Isolator (2/0 Channel Directionality)
Voltage References 6
AD780
PRODUCTION 2.5 V/3.0 V High Precision Reference
REF43
NOT RECOMMENDED FOR NEW DESIGNS +2.5V Low Power Precision Voltage Reference
REF192
PRODUCTION 2.5V Precision Micropower, Low Dropout, Low Voltage Reference
AD589
NOT RECOMMENDED FOR NEW DESIGNS Two-Terminal IC 1.2 V Reference
AD1580
PRODUCTION 1.2 V Micropower, Precision Shunt Voltage Reference
ADR512
PRODUCTION 1.2 V Precision Low Noise Shunt Voltage Reference
Modal heading
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project

Tools & Simulations

Design Tool 1

Sigma-Delta ADC Tutorial

An interactive illustration showing the behavior of an idealized sigma-delta A/D converter.

Open Tool

Evaluation Kits

EVAL-AD7714

AD7714 Evaluation Kit

Buy Now View Details

Product Details

The EVAL-AD7714-3EBZ is a fully featured evaluation Board for the AD7714. The evaluation board can be connected to a PC via a standard USB interface. Software is provided enabling the user to perform detailed analysis of the ADC's performance.


Please note: This Evaluation software does not run on Windows 8 or Windows 10 (USB driver is non-compliant with OS >Windows 7).
EVAL-AD7714
AD7714 Evaluation Kit

Latest Discussions

2 Years Ago
Interceptors Request
2 Years Ago
Interceptors Request
2 Years Ago
Interceptors Request
View related discussion on EngineerZone®

Recently Viewed