AD7713
PRODUCTIONCMOS, Low Power 24-Bit Sigma-Delta, Signal Conditioning ADC with Matched RTD Current Sources
- Part Models
- 3
- 1ku List Price
- Starting From $42.49
Overview
- Charge Balancing ADC
24 Bits No Missing Codes
±0.0015% Nonlinearity - Low-Pass Filter with Programmable Filter Cutoffs
- Ability to Read/Write Calibration Coefficients
- Bidirectional Microcontroller Serial Interface
- 3-Channel Programmable Gain Front End
Gains from 1 to 128
2 Differential Inputs
1 Single-Ended High Voltage Input - Single-Supply Operation
- Low Power (3.5 mW typ) with Power-Down Mode (150 µW typ)
The AD7713 is a complete analog front end for low frequency measurement applications. The device accepts low level signals directly from a transducer or high level signals (4 × VREF ) 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 two differential analog inputs and one single-ended high level analog input as well as a differential reference input. It can be operated from a single supply (AVDD and DVDD at +5 V). The part provides two current sources which can be used to provide excitation in three-wire and four-wire RTD configurations. The AD7713 thus performs all signal conditioning and conversion for a single, dual or three-channel system.
The AD7713 is ideal for use in smart, microcontroller-based systems. Gain settings, signal polarity and RTD current control can be configured in software using the bidirectional serial port. The AD7713 contains self-calibration, system calibration and background calibration options and also allows the user to read and to write the on-chip calibration registers.
CMOS construction ensures low power dissipation and a hardware programmable power-down mode reduces the standby power consumption to only 150 µW typical. The part is available in a 24-pin, 0.3 inch wide, plastic and hermetic dual-in-line package (DIP) as well as a 24-lead small outline (SOIC) package.
Documentation
Data Sheet 1
Application Note 11
Technical Articles 4
Analog Dialogue 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD7713ANZ | 24-Lead PDIP | ||
| AD7713ARZ | 24-Lead SOIC (Wide) | ||
| AD7713ARZ-REEL | 24-Lead SOIC (Wide) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Mar 7, 2019 - 19_0046 Assembly Transfer of 18,20,24,28 Lead PDIP to Cirtek |
||
| AD7713ANZ | PRODUCTION | |
|
Aug 19, 2009 - 07_0024 Package Material Changes for SOT23, MiniSO, MQFP, PDIP, PLCC, SOIC (narrow and wide body), SSOP, TSSOP and TSSOP exposed pad |
||
| AD7713ANZ | PRODUCTION | |
|
Feb 7, 2011 - 10_0003 Halogen Free Material Change for SOIC Wide Body Products Assembled at Amkor |
||
| AD7713ARZ | PRODUCTION | |
| AD7713ARZ-REEL | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
AD7713 Code Examples 2
Evaluation Software 0
Can't find the software or driver you need?
Tools & Simulations
Sigma-Delta ADC Tutorial
An interactive illustration showing the behavior of an idealized sigma-delta A/D converter.
Open Tool