Key facts
- Brand
- Analog Devices
- Model
- AD7745
- Category
- Other Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2012-05-09
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Analog Devices AD7745/AD7746 24‑Bit Capacitance‑to‑Digital Converter Data Sheet
The AD7745 and AD7746 are 24‑bit Σ‑Δ capacitance‑to‑digital converters with an integrated temperature sensor. They support single‑ended or differential floating sensor inputs, offer resolution down to 4 aF, and provide a programmable on‑chip CAPDAC for offset calibration. The devices operate from a single 2.7 V to 5.25 V supply and are housed in a 16‑lead TSSOP package.
Typical applications include automotive, industrial, and medical pressure measurement, position and level sensing, flow‑metering, humidity detection, and impurity detection. The datasheet includes specifications, timing diagrams, pin descriptions, performance curves, and an ordering guide.
Analog Devices AD7745 specifications
| Capacitance accuracy | ±4 fF |
|---|---|
| Supply voltage | 2.7 V to 5.25 V (single‑supply) |
| Supply current | 0.7 mA typical |
| Operating temperature range | –40 °C to +125 °C |
| Package | 16‑lead TSSOP |
| Update rate | 10 Hz to 90 Hz |
| Temperature sensor resolution | 0.1 °C |
Source: Analog Devices AD7745/AD7746 24‑Bit Capacitance‑to‑Digital Converter Data Sheet
All Analog Devices AD7745 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What supply voltage does the AD7745/AD7746 require?
It operates from a single supply of 2.7 V to 5.25 V.
From: Analog Devices AD7745/AD7746 24‑Bit Capacitance‑to‑Digital Converter Data Sheet
What is the resolution of the on‑chip temperature sensor?
The temperature sensor provides 0.1 °C resolution with ±2 °C accuracy.
From: Analog Devices AD7745/AD7746 24‑Bit Capacitance‑to‑Digital Converter Data Sheet
What is the supply voltage range for the AD7745/AD7746?
The devices operate from a single 2.7 V to 5.25 V supply.
From: Analog Devices AD7745/AD7746 Capacitive-to-Digital Converter Datasheet
What temperature range can the AD7745/AD7746 operate in?
They are specified for -40 °C to +125 °C operation.
From: Analog Devices AD7745/AD7746 Capacitive-to-Digital Converter Datasheet