AD7714ARSZ-5

Product Summary

The AD7714ARSZ-5 is a complete analog front end for low-frequency measurement applications. The AD7714ARSZ-5 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 onchip digital filter. The first notch of this digital filter AD7714ARSZ-5 can be programmed via the on-chip control register allowing adjustment of the filter cutoff and settling time. The applications of the AD7714ARSZ-5 include Portable Industrial Instruments, Portable Weigh Scales, Loop-Powered Systems and Pressure Transducers.

Parametrics

AD7714ARSZ-5 absolute maximum ratings: (1)AVDD to AGND: –0.3 V to +7 V; (2)AVDD to DGND: –0.3êV to +7êV; (3)DVDD to AGND: –0.3êV to +7êV; (4)DVDD to DGND: –0.3V to +7V; (5)Analog Input Voltage to AGND: –0.3 V to AVDD + 0.3êV; (6)Reference Input Voltage to AGND: –0.3 V to AVDD + 0.3êV; (7)Digital Input Voltage to DGND: –0.3 V to DVDD + 0.3 V; (8)Digital Output Voltage to DGND: –0.3 V to DVDD + 0.3 V; (9)Operating Temperature Range, Commercial (A Version): –40℃ to +85℃; Extended (Y Version): –40℃ to +105℃; (10)Storage Temperature Range: –65℃ to +150℃; (11)Junction Temperature: +150℃; (12)Power Dissipation: 450 mW; (13)qJA Thermal Impedance: 105℃/W; (14)Lead Temperature (Soldering, 10 sec): +260℃.

Features

AD7714ARSZ-5 features: (1)Charge Balancing ADC: 24 Bits No Missing Codes; 0.0015% Nonlinearity; (2)Five-Channel Programmable Gain Front End: Gains from 1 to 128; Can Be Configured as Three Fully Differential; Inputs or Five Pseudo-Differential Inputs; (3)Three-Wire Serial Interface: SPI, QSPI, MICROWIRE. and DSP Compatible; (4)5 V Operation; (5)Low Noise (<150 nV rms); (6)Low Current (350êmA typ) with Power-Down (5 mA typ); (7)Low-Pass Filter with Programmable Filter Cutoffs; (8)Ability to Read/Write Calibration Coefficients.

Diagrams