Key facts
- Brand
- Analog Devices
- Model
- AD7781
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-05-09
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Analog Devices AD7781 20‑Bit Sigma‑Delta ADC Datasheet
The AD7781 is a complete front‑end solution for bridge sensor products such as weigh scales, strain gauges, and pressure sensors. It integrates a 20‑bit sigma‑delta ADC, a programmable gain amplifier, an internal clock oscillator, and a bridge power‑down switch, operating from 2.7 V to 5.25 V.
The device offers pin‑programmable filter response (10 Hz or 16.7 Hz update rates), gain selection (1 or 128), and a low‑power consumption of 115 µA typical at gain = 1. All functions are controlled via dedicated pins, and eight status bits are appended to each conversion for data integrity verification.
Analog Devices AD7781 specifications
| Resolution | 20 bits |
|---|---|
| Typical Current (Gain = 1) | 115 µA |
| Update Rate Options | 10 Hz or 16.7 Hz |
| Gain Options | 1 or 128 |
| Operating Temperature Range | ‑40 °C to +105 °C |
Source: Analog Devices AD7781 20‑Bit Sigma‑Delta ADC Datasheet
All Analog Devices AD7781 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
How much current does the AD7781 draw at gain = 1?
Typical current consumption is 115 µA when the gain is set to 1.
From: Analog Devices AD7781 20‑Bit Sigma‑Delta ADC Datasheet
What update rates are available for the filter response?
The filter can be set to either 10 Hz or 16.7 Hz update rate via a pin‑selectable option.
From: Analog Devices AD7781 20‑Bit Sigma‑Delta ADC Datasheet
What update‑rate options does the AD7781 support?
The AD7781 can operate at either 10 Hz or 16.7 Hz update rates, selectable via a pin‑programmed filter.
Which package types are available for the AD7781?
The AD7781 is offered in a 14‑lead narrow‑body SOIC package and a 16‑lead TSSOP package.