AD7712ARZ-REEL

Product Summary

The AD7712ARZ-REEL is a complete analog front end for low frequency measurement applications. The AD7712ARZ-REEL has two analog input channels and accepts either low level signals directly from a transducer or high level signals, and outputs a serial digital word. The AD7712ARZ-REEL employs a sigma-delta conversion technique to realize up to 24 bits of no missing codes performance. The low level input signal is applied to a proprietary programmable gain front end based around an analog modulator. The high level analog input is attenuated before being applied to the same modulator. The AD7712ARZ-REEL 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 applications of the AD7712ARZ-REEL inlcude Process Control, Smart Transmitters and Portable Industrial Instruments.

Parametrics

AD7712ARZ-REEL absolute maximum ratings: (1)AVDD to DVDD: –0.3 V to +12 V; (2)AVDD to VSS: –0.3 V to +12 V; (3)AVDD to AGND: –0.3 V to +12 V; (4)AVDD to DGND:–0.3 V to +12 V; (5)DVDD to AGND: –0.3 V to +6 V; (6)DVDD to DGND: –0.3 V to +6 V; (7)VSS to AGND: +0.3 V to –6 V; (8)VSS to DGND: +0.3 V to –6 V; (9)AIN1 Input Voltage to AGND: VSS – 0.3 V to AVDD + 0.3 V; (10)Reference Input Voltage to AGND VSS: – 0.3 V to AVDD + 0.3 V; (11)REF OUT to AGND: –0.3 V to AVDD; (12)Digital Input Voltage to DGND: –0.3 V to AVDD + 0.3 V; (13)Digital Output Voltage to DGND: –0.3 V to DVDD + 0.3 V; (14)Operating Temperature Range Commercial (A Version): –40 to +85℃; (15)Extended (S Version): –55 to +125℃; (16)Storage Temperature Range: –65°C to +150℃; (17)Lead Temperature (Soldering, 10 secs): 300℃; (18)Power Dissipation (Any Package) to 75℃: 450 mW.

Features

AD7712ARZ-REEL features: (1)Charge Balancing ADC; (2)24 Bits No Missing Codes; (3)±0.0015% Nonlinearity; (4)High Level and Low Level Analog Input Channels; (5)Programmable Gain for Both Inputs; (6)Gains from 1 to 128; (7)Differential Input for Low Level Channel; (8)Low-Pass Filter with Programmable Filter Cutoffs; (9)Ability to Read/Write Calibration Coefficients; (10)Bidirectional Microcontroller Serial Interface; (11)Internal/External Reference Option; (12)Single- or Dual-Supply Operation; (13)Low Power (25 mW typ) with Power-Down Mode (100 W typ).

Diagrams