GENERAL DESCRIPTION?

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.

FEATURES

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 Noise (<150 nV rms)

Low Current (350? mA typ) with Power-Down (5 mA typ)

AD7714Y Grade:

+2.7 V to 3.3 V or +4.75 V to +5.25 V Operation 0.0010 Linearity Error –40°C to +105°C Temperature Range Schmitt Trigger on SCLK and DIN

Low Current (226? mA typ) with Power-Down (4 mA typ)

Lower Power Dissipation than Standard AD7714 Available in 24-Lead TSSOP Package

Low-Pass Filter with Programmable Filter Cutoffs

Ability to Read/Write Calibration Coefficients

APPLICATIONS

Portable Industrial Instruments

Portable Weigh Scales

Loop-Powered Systems

Pressure Transducers

EVAL-AD7714-3EB屬于開發(fā)板，套件，編程器 > 評(píng)估板 - 模數(shù)轉(zhuǎn)換器（ADC）。亞德諾半導(dǎo)體技術(shù)有限公司制造生產(chǎn)的EVAL-AD7714-3EB評(píng)估板 - 模數(shù)轉(zhuǎn)換器（ADC）模數(shù)轉(zhuǎn)換器 (ADC) 評(píng)估板是預(yù)裝有元器件的電路板，用于提供特定 ADC 或器件工作實(shí)例。特定板上的 A/D 轉(zhuǎn)換器數(shù)量從 3 到 32 不等，每秒采樣率從 2.5 kHz 到 26 GHz 不等，輸入電壓范圍從 0 到 8 Vp-p。