仕様
| 属性 | 値 |
| Package / Case | Bulk,Tube |
| Part Status | Active |
| Type | Capacitance-to-Digital Converter |
| Number of Channels | 1 |
| Resolution(Bits) | 24 b |
| Data Interface | Serial |
| Voltage Supply Source | Single Supply |
| Voltage - Supply | 2.7V ~ 5.25V |
| Operating Temperature | -40°C ~ 125°C |
| Mounting Type | Surface Mount |
概要
Description
The AD7745ARUZ is a high-resolution, capacitance-to-digital converter (CDC) from Analog Devices. It measures capacitance with 24-bit resolution and supports a range of ±4 pF (with adjustable offset). Key features include:
- I²C Interface: Simple digital communication.
- On-Chip Temperature Sensor: For compensation or standalone use.
- Low Power: Suitable for battery-powered applications.
- Single/Differential Inputs: Flexible for various sensor configurations.
Applications include proximity sensing, liquid level detection, and humidity monitoring. The device integrates signal conditioning, reducing external component needs. Operating voltage ranges from 2.7V to 5.25V, and it comes in a TSSOP-16 package.
For detailed specs, refer to the datasheet.
- I²C Interface: Simple digital communication.
- On-Chip Temperature Sensor: For compensation or standalone use.
- Low Power: Suitable for battery-powered applications.
- Single/Differential Inputs: Flexible for various sensor configurations.
Applications include proximity sensing, liquid level detection, and humidity monitoring. The device integrates signal conditioning, reducing external component needs. Operating voltage ranges from 2.7V to 5.25V, and it comes in a TSSOP-16 package.
For detailed specs, refer to the datasheet.
Equivalent
Equivalent products to the AD7745ARUZ (capacitance-to-digital converter) include:
1. AD7746 - Similar functionality with additional voltage input.
2. AD7147 - Capacitive touch sensor with digital output.
3. FDC1004 (Texas Instruments) - Capacitance-to-digital converter with 4 channels.
4. PCap01 (ACAM Messelectronic) - High-precision capacitive sensor IC.
These alternatives offer comparable features for capacitance measurement and digital conversion. Check datasheets for exact specs.
1. AD7746 - Similar functionality with additional voltage input.
2. AD7147 - Capacitive touch sensor with digital output.
3. FDC1004 (Texas Instruments) - Capacitance-to-digital converter with 4 channels.
4. PCap01 (ACAM Messelectronic) - High-precision capacitive sensor IC.
These alternatives offer comparable features for capacitance measurement and digital conversion. Check datasheets for exact specs.
Features
The AD7745ARUZ is a high-resolution, capacitance-to-digital converter (CDC) with key features:
- Resolution: 24-bit Σ-Δ architecture for precise capacitance measurement.
- Input Range: ±4 pF (differential) or 0–8 pF (single-ended).
- Accuracy: ±4 fF (femtofarads) typical.
- Update Rate: Up to 90 Hz (16-bit mode) or 10 Hz (24-bit mode).
- On-Chip Features: Temperature sensor (±2°C accuracy) and excitation source for capacitive sensors.
- Interface: I²C-compatible (up to 400 kHz).
- Supply Voltage: 2.7 V to 5.25 V, low power consumption (~1 mA).
- Applications: Proximity sensing, pressure/level detection, and humidity monitoring.
Compact TSSOP-16 package. Ideal for high-precision capacitive sensing.
- Resolution: 24-bit Σ-Δ architecture for precise capacitance measurement.
- Input Range: ±4 pF (differential) or 0–8 pF (single-ended).
- Accuracy: ±4 fF (femtofarads) typical.
- Update Rate: Up to 90 Hz (16-bit mode) or 10 Hz (24-bit mode).
- On-Chip Features: Temperature sensor (±2°C accuracy) and excitation source for capacitive sensors.
- Interface: I²C-compatible (up to 400 kHz).
- Supply Voltage: 2.7 V to 5.25 V, low power consumption (~1 mA).
- Applications: Proximity sensing, pressure/level detection, and humidity monitoring.
Compact TSSOP-16 package. Ideal for high-precision capacitive sensing.
Pinout
The AD7745ARUZ is a 16-pin (TSSOP package) capacitive-to-digital converter (CDC) with the following key functions:
- Pins 1–2 (CIN1+, CIN1–): Differential capacitive input channels.
- Pins 3–4 (CIN2+, CIN2–): Second differential capacitive input (or single-ended mode).
- Pin 5 (EXCA): Excitation output for capacitive sensing.
- Pin 6 (EXCB): Second excitation output (optional).
- Pin 7 (VDD): Power supply (2.7V–5.25V).
- Pin 8 (GND): Ground.
- Pin 9 (SCL): I²C clock input.
- Pin 10 (SDA): I²C data line.
- Pin 11 (RDY): Data-ready output (interrupt).
- Pin 12 (VIN): Auxiliary voltage input (for combined capacitance/voltage measurements).
- Pins 13–16 (NC): No connection (reserved).
It provides high-resolution (24-bit) capacitance-to-digital conversion for proximity, level, and pressure sensing applications.
- Pins 1–2 (CIN1+, CIN1–): Differential capacitive input channels.
- Pins 3–4 (CIN2+, CIN2–): Second differential capacitive input (or single-ended mode).
- Pin 5 (EXCA): Excitation output for capacitive sensing.
- Pin 6 (EXCB): Second excitation output (optional).
- Pin 7 (VDD): Power supply (2.7V–5.25V).
- Pin 8 (GND): Ground.
- Pin 9 (SCL): I²C clock input.
- Pin 10 (SDA): I²C data line.
- Pin 11 (RDY): Data-ready output (interrupt).
- Pin 12 (VIN): Auxiliary voltage input (for combined capacitance/voltage measurements).
- Pins 13–16 (NC): No connection (reserved).
It provides high-resolution (24-bit) capacitance-to-digital conversion for proximity, level, and pressure sensing applications.
Manufacturer
The AD7745ARUZ is manufactured by Analog Devices, Inc. (ADI), a leading global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing (DSP) integrated circuits. Founded in 1965, ADI is known for its precision data conversion, signal conditioning, and sensor technology, serving industries like automotive, healthcare, industrial automation, and communications. The AD7745ARUZ is a capacitance-to-digital converter (CDC) used in precision sensing applications.
Analog Devices is headquartered in Wilmington, Massachusetts, and is recognized for innovation in analog and digital signal processing solutions.
Analog Devices is headquartered in Wilmington, Massachusetts, and is recognized for innovation in analog and digital signal processing solutions.
Application
The AD7745ARUZ is a high-resolution capacitance-to-digital converter (CDC) used in precision sensing applications. Key areas include:
1. Proximity Sensing – Detecting object presence without contact.
2. Level Measurement – Monitoring liquid or granular material levels in tanks.
3. Humidity Sensing – Integrated into hygrometers for moisture detection.
4. Pressure Sensing – Used in capacitive pressure transducers.
5. Industrial Automation – Position and displacement sensing in machinery.
6. Medical Devices – Fluid level detection in diagnostic equipment.
Its high accuracy (24-bit resolution) and low power make it ideal for sensitive, low-power applications.
1. Proximity Sensing – Detecting object presence without contact.
2. Level Measurement – Monitoring liquid or granular material levels in tanks.
3. Humidity Sensing – Integrated into hygrometers for moisture detection.
4. Pressure Sensing – Used in capacitive pressure transducers.
5. Industrial Automation – Position and displacement sensing in machinery.
6. Medical Devices – Fluid level detection in diagnostic equipment.
Its high accuracy (24-bit resolution) and low power make it ideal for sensitive, low-power applications.
Package
The AD7745ARUZ comes in a TSSOP-16 package. This surface-mount type features a thin-shrink small outline with 16 pins, suitable for compact PCB designs. The package dimensions are typically 5mm x 4.4mm with a 0.65mm pin pitch. It is RoHS-compliant and designed for reliable performance in precision capacitance-to-digital conversion applications.
