Overview
The AD7817ARZ-REEL7, produced by Analog Devices Inc., is a 10-bit, 4-channel analog-to-digital converter (ADC) that also features an on-chip temperature sensor. This device operates from a single power supply voltage ranging from 2.7 V to 5.5 V, making it versatile for various applications. The AD7817 includes a successive approximation converter based on a capacitor digital-to-analog converter (DAC), an on-chip clock oscillator, and inherent track-and-hold functionality. Additionally, it has an on-chip reference voltage of 2.5 V and supports multiple serial interface protocols, including Intel 8051, Motorola SPI and QSPI, and National Semiconductors MICROWIRE.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 10-bit | |
| Number of Channels | 4 | |
| Conversion Time | 9 μs | |
| Power Supply Voltage | 2.7 V to 5.5 V | |
| On-chip Temperature Sensor Accuracy | ±2°C | |
| Temperature Measurement Range | -55°C to +125°C | |
| On-chip Reference Voltage | 2.5 V | |
| Package Type | 16-lead SOIC, 16-lead TSSOP | |
| Power Dissipation | 450 mW | |
| Thermal Impedance (θJA) | 100°C/W (SOIC), 120°C/W (TSSOP) |
Key Features
- On-chip temperature sensor with an accuracy of ±2°C and a resolution of ±0.25°C.
- Successive approximation converter with a conversion time of 9 μs.
- On-chip clock oscillator and inherent track-and-hold functionality.
- On-chip 2.5 V reference voltage, with the option to use an external reference.
- Flexible serial interface compatible with Intel 8051, Motorola SPI and QSPI, and National Semiconductors MICROWIRE protocols.
- Low power consumption with a power dissipation of 450 mW.
- Available in 16-lead SOIC and 16-lead TSSOP packages.
Applications
- Industrial automation and control systems.
- Medical devices requiring temperature monitoring.
- Aerospace and defense applications where precise temperature measurement is critical.
- Automotive systems for engine and ambient temperature monitoring.
- Environmental monitoring and data logging systems.
Q & A
- What is the resolution of the AD7817 ADC?
The AD7817 has a 10-bit resolution.
- How many analog input channels does the AD7817 have?
The AD7817 has four analog input channels.
- What is the conversion time of the AD7817?
The conversion time is 9 μs.
- What is the operating voltage range of the AD7817?
The AD7817 operates from a single power supply voltage ranging from 2.7 V to 5.5 V.
- Does the AD7817 have an on-chip temperature sensor?
Yes, the AD7817 includes an on-chip temperature sensor with an accuracy of ±2°C.
- What is the temperature measurement range of the on-chip temperature sensor?
The temperature measurement range is -55°C to +125°C.
- What serial interface protocols is the AD7817 compatible with?
The AD7817 is compatible with Intel 8051, Motorola SPI and QSPI, and National Semiconductors MICROWIRE protocols.
- What are the available package types for the AD7817?
The AD7817 is available in 16-lead SOIC and 16-lead TSSOP packages.
- What is the power dissipation of the AD7817?
The power dissipation is 450 mW.
- Can the AD7817 use an external reference voltage?
Yes, the AD7817 can use an external reference voltage, which can be connected to the REFIN pin.
