AD7730BRU-REEL7

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1. General description

AD7730BRU-REEL7 is a complete analog front end for electronic scales and Pressure measurement application. The device directly receives low-level signals from the transducer and outputs a serial signal. Number words. The input signal is applied to a proprietary programmable gain front end based on an analog modulator Modulator output is processed by low-pass programmable Digital filter, allowing adjustment of the filter cutoff frequency, output rate and stable schedule. The device has two buffered differential programmable gains Analog input and differential reference input. That part It is powered by a single +5 V power supply. It accepts four unipolar Analog input range: 0 mV to +10 mV, +20 mV, +40 mV and +80 mV and four bipolar ranges: ±10 mV, ±20 mV, ±40 mV And ±80 mV. Peak-to-peak resolution directly achieved From this part is 1 out of 230,000 counts. On-chip 6-bit DAC It is allowed to remove the tare voltage. A clock signal for synchronizing the AC excitation of the bridge is also provided. The serial interface on the part can be configured as a three-wire system Operate and compatible with microcontroller and digital Signal processor. AD7730BRU-REEL7 contains self-calibration and System calibration option, and has a small offset drift Less than 5 nV/°C, gain drift is less than 2 ppm/°C. AD7730BRU-REEL7 adopts 24-pin plastic DIP, 24-pin package SOIC and 24-lead TSSOP packages. AD7730BRU-REEL7 available Available in 24-pin SOIC and 24-pin TSSOP packages.

2. KEY FEATURES

    1. Resolution of 230,000 Counts (Peak-to-Peak)

    2. Offset Drift: 5 nV/C

    3. Gain Drift: 2 ppm/C

    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. ADDITIONAL FEATURES

  10. Two-Channel Programmable Gain Front End

  11. On-Chip DAC for Offset/TARE Removal

  12. FASTStep™ Mode

  13. AC or DC Excitation

  14. Single Supply Operation

3. PIN CONFIGURATION

4. APPLICATIONS

    1. Weigh Scales

    2. Pressure Measurement

5. FUNCTIONAL BLOCK DIAGRAM

6. OUTLINE DIMENSIONS