AD7730BNZ

Product Summary

The AD7730BNZ is a complete analog front end for weigh-scale and pressure measurement applications. The device accepts lowlevel signals directly from a transducer and outputs a serial digital word. The input signal is applied to a proprietary programmable gain front end based around an analog modulator.

Parametrics

Absolute maximum ratings: (1)AVDD to AGND: –0.3 V to +7 V; (2)AVDD to DGND: –0.3 V to +7 V; (3)DVDD to AGND: –0.3 V to +7 V; (4)DVDD to DGND: –0.3 V to +7 V; (5)AGND to DGND: –5 V to +0.3 V; (6)AVDD to DVDD: –2 V to +5 V; (7)Analog Input Voltage to AGND: –0.3 V to AVDD + 0.3 V; (8)Reference Input Voltage to AGND: –0.3 V to AVDD + 0.3 V; (9)AIN/REF IN Current (Indefinite): 30 mA; (10)Digital Input Voltage to DGND: –0.3 V to DVDD + 0.3 V; (11)Digital Output Voltage to DGND: –0.3 V to DVDD + 0.3 V; (12)Output Voltage (ACX, ACX, D0, D1) to DGND: –0.3 V to AVDD + 0.3 V; (13)Operating Temperature Range: industrial (B Version): –40℃ to +85℃; (14)Storage Temperature Range: –65℃ to +150℃; (15)Junction Temperature: +150℃; (16)Power Dissipation: 450 mW; (17)θJA Thermal Impedance: 105℃/W; (18)Lead Temperature (Soldering, 10 sec): +260℃; (19)TSSOP Package, Power Dissipation: 450 mW; (20)θJA Thermal Impedance: 128℃/W; (21)Lead Temperature, Soldering: Vapor Phase (60 sec): +215℃; Infrared (15 sec): +220℃; (22)SOIC Package, Power Dissipation: 450 mW; (23)θJA Thermal Impedance: 75℃/W; (24)Lead Temperature, Soldering: Vapor Phase (60 sec): +215℃; Infrared (15 sec): +220℃.

Features

Features: (1)Resolution of 230,000 Counts (Peak-to-Peak); (2)Offset Drift: 5 nV/℃; (3)Gain Drift: 2 ppm/℃; (4)Line Frequency Rejection: >150 dB; (5)Buffered Differential Inputs; (6)Programmable Filter Cutoffs; (7)Specified for Drift Over Time; (8)Operates with Reference Voltages of 1 V to 5 V; (9)Two-Channel Programmable Gain Front End; (10)On-Chip DAC for Offset/TARE Removal; (11)FAST Step Mode; (12)AC or DC Excitation; (13)Single Supply Operation.

Diagrams