Overview
The AD7818ARMZ-REEL7, produced by Analog Devices Inc., is a single-channel, 10-bit analog-to-digital converter (ADC) with an integrated temperature sensor. This device operates from a single power supply ranging from 2.7 V to 5.5 V and features a successive approximation register (SAR) architecture, enabling conversions at a rate of 100 kSPS. The AD7818 is housed in an 8-pin MSOP package, making it suitable for applications where space is limited.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 10 bits |
| Conversion Rate | 100 kSPS |
| Power Supply | 2.7 V to 5.5 V |
| Package Type | 8-pin MSOP |
| Temperature Range | -40°C to 85°C |
| On-chip Reference | 2.5 V |
| Temperature Sensor Accuracy | ±2°C (at 25°C), ±3°C (over temperature range) |
| Input Channels | Single channel (AD7818), 4 channels (AD7817 variant) |
| Input Voltage Range | 0 V to VREF |
| Power Dissipation | 450 mW |
| Thermal Impedance (θJA) | 206°C/W (MSOP package) |
Key Features
- Successive approximation register (SAR) architecture for high-speed conversions.
- Integrated on-chip temperature sensor with ±2°C accuracy at 25°C.
- On-chip clock oscillator and reference (2.5 V).
- Inherent track-and-hold functionality.
- Serial interface for data transfer.
- Low power consumption and compact 8-pin MSOP package.
- Operating temperature range from -40°C to 85°C.
Applications
The AD7818ARMZ-REEL7 is suitable for a variety of applications, including:
- Automotive systems: Due to its operating temperature range and robust design.
- Industrial control systems: For precise measurement and monitoring.
- Medical devices: Where accurate temperature sensing and analog-to-digital conversion are critical.
- Consumer electronics: In devices requiring compact, low-power ADC solutions.
Q & A
- What is the resolution of the AD7818ARMZ-REEL7?
The AD7818ARMZ-REEL7 has a resolution of 10 bits. - What is the conversion rate of the AD7818ARMZ-REEL7?
The conversion rate is 100 kSPS. - What is the power supply range for the AD7818ARMZ-REEL7?
The power supply range is from 2.7 V to 5.5 V. - What type of package does the AD7818ARMZ-REEL7 come in?
The AD7818ARMZ-REEL7 is housed in an 8-pin MSOP package. - What is the accuracy of the on-chip temperature sensor?
The on-chip temperature sensor has an accuracy of ±2°C at 25°C and ±3°C over the operating temperature range. - Can the AD7818ARMZ-REEL7 use an external reference voltage?
Yes, an external 2.5 V reference can be connected, but the internal reference will shut down if an external reference is used. - What is the thermal impedance (θJA) of the MSOP package?
The thermal impedance (θJA) of the MSOP package is 206°C/W. - What is the power dissipation of the AD7818ARMZ-REEL7?
The power dissipation is 450 mW. - What are the typical applications for the AD7818ARMZ-REEL7?
Typical applications include automotive systems, industrial control systems, medical devices, and consumer electronics. - How does the serial interface work for data transfer?
The serial interface uses a clock input (SCLK) to clock data into and out of the device, with data clocked out on the falling edge and clocked in on the rising edge of the SCLK signal.
