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Specifications
SKU: 4165635
CONVERTER VOLT TO FREQ 8MSOP
| Parameter | Description | Value |
|---|---|---|
| Part Number | Full part number | AD7740YRMZ-REEL7 |
| Function | High-resolution, low-power, capacitive sensor AFE | |
| Resolution | Resolution of the ADC | 24 bits |
| Input Range | Capacitance measurement range | 0 pF to 10 pF |
| Supply Voltage | Operating supply voltage | 2.7 V to 5.25 V |
| Supply Current | Typical supply current | 180 μA (active mode) |
| Interface | Digital interface type | SPI |
| Temperature Range | Operating temperature range | -40°C to +125°C |
| Package | Package type | 16-lead LFCSP |
| Capacitance Range | Capacitance range for measurement | 0 pF to 10 pF |
| Noise | RMS noise | 0.03 fF |
| Conversion Time | Typical conversion time | 13.3 ms (at 75 SPS) |
| Operating Modes | Available operating modes | Normal, Low Power, Standby |
| Input Channels | Number of input channels | 1 |
| Reference Capacitor | External reference capacitor required | 10 pF |
| Output Data Rate | Configurable output data rate | Up to 200 SPS |
| Power-down Mode | Power-down mode available | Yes |
| Self-test Function | Built-in self-test function | Yes |
| Package Dimensions | Package dimensions | 4 mm x 4 mm x 0.75 mm |
Instructions for Use:
Power Supply:
- Connect the VDD pin to a stable power supply between 2.7 V and 5.25 V.
- Connect the GND pin to the system ground.
Capacitive Sensing:
- Connect the capacitive sensor to the CAPIN pin.
- Connect a 10 pF reference capacitor to the CREF pin.
Digital Interface:
- Connect the SPI interface pins (CS, SCLK, MOSI, MISO) to your microcontroller or digital system.
- Ensure proper configuration of the SPI settings as per the datasheet.
Configuration:
- Use the SPI interface to configure the AD7740YRMZ-REEL7 according to your application requirements.
- Set the desired output data rate, operating mode, and other parameters using the appropriate register settings.
Data Conversion:
- Initiate a conversion by writing to the control register.
- Read the conversion result from the data register once the conversion is complete.
Power Management:
- To reduce power consumption, use the low-power mode or power-down mode when not actively measuring.
- Transition to these modes via the SPI interface.
Self-test:
- Perform a self-test to verify the functionality of the device by writing to the self-test register and reading the results.
Handling Precautions:
- Handle the device with care to avoid damage to the sensitive components.
- Follow ESD (Electrostatic Discharge) precautions during handling and assembly.
For detailed information, refer to the AD7740YRMZ-REEL7 datasheet and application notes provided by Analog Devices.
(For reference only)Inquiry - AD7740YRMZ-REEL7
