Product Summary

The AD7730LBRZ is a complete low power analog front-end for weigh-scale and pressure measurement applications. The device accepts low level 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. The modulator output is processed by a low pass programmable digital filter, allowing adjustment of filter cutoff, output rate and settling-time.

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.

Features

Features: (1)Resolution of 230,000 Counts (Peak-to-Peak); (2)Offset Drift: 5 nV/8C; (3)Gain Drift: 2 ppm/8C; (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)FASTStep. Mode; (12)AC or DC Excitation; (13)Single Supply Operation.

Diagrams

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
AD7730LBRZ
AD7730LBRZ

IC ADC TRANSDUCER BRIDGE 24SOIC
Data Sheet
0-1: $10.80
1-10: $9.82
10-100: $8.34
100-250: $7.61
250-500: $7.12
500-1000: $6.54
AD7730LBRZ-REEL
AD7730LBRZ-REEL

IC ADC TRANSDUCER BRIDGE 24SOIC
Data Sheet
0-1000: $6.54