Overview
The AD7817ARU is a high-performance, low-power analog-to-digital converter (ADC) produced by Analog Devices Inc. This component is part of the AD7817 series, which includes single- and 4-channel ADCs with an integrated temperature sensor. The AD7817ARU operates from a single 2.7 V to 5.5 V power supply and features a 10-bit resolution with a conversion time of 9 μs. It is designed for applications requiring high accuracy, low power consumption, and easy integration via an SPI interface.
Key Specifications
| Parameter | Value | Unit | Comments |
|---|---|---|---|
| Resolution | 10 | Bits | |
| Supply Voltage | 2.7 to 5.5 | V | |
| Operating Temperature Range | -55 to +125 | °C | |
| Temperature Sensor Accuracy | ±2.25°C (max) | °C | |
| Conversion Time | 9 μs | μs | |
| Signal to (Noise + Distortion) Ratio | 58 dB (min) | dB | fIN = 20 kHz |
| Total Harmonic Distortion | -65 dB (max), -75 dB (typ) | dB | fIN = 20 kHz |
| Channel-to-Channel Isolation | -80 dB (typ) | dB | fIN = 20 kHz |
| Package Type | 16-SOIC, 16-TSSOP |
Key Features
- 10-bit resolution with a successive approximation converter based on a capacitor DAC.
- On-chip temperature sensor with an accuracy of ±2.25°C.
- On-chip clock oscillator and inherent track-and-hold functionality.
- On-chip 2.5 V reference, with the option to use an external reference.
- Low power consumption, with automatic power-down feature for superior power performance at slower throughput rates.
- SPI interface compatible with Intel 8051, Motorola SPI, QSPI, and National Semiconductors MICROWIRE protocols.
- Four single-ended analog input channels (VIN1 to VIN4) with respect to AGND.
- Moisture Sensitivity Level (MSL): 1 (Unlimited).
Applications
- Industrial and commercial equipment.
- HVAC systems.
- Automotive applications.
- Consumer electronics.
- Medical devices.
- Portable medical instruments.
- Computers and printers.
- Battery management and power supply modules.
- Mobile and cellular phones.
- Power supply thermal shutdown.
Q & A
- What is the resolution of the AD7817ARU?
The AD7817ARU has a 10-bit resolution. - What is the operating voltage range of the AD7817ARU?
The AD7817ARU operates from a single 2.7 V to 5.5 V power supply. - What is the accuracy of the on-chip temperature sensor?
The on-chip temperature sensor has an accuracy of ±2.25°C. - How long does a conversion take on the AD7817ARU?
A conversion takes 9 μs. - What interface does the AD7817ARU use for communication?
The AD7817ARU uses an SPI interface. - Is the AD7817ARU suitable for low power applications?
Yes, the AD7817ARU has low power consumption and an automatic power-down feature for superior power performance at slower throughput rates. - What are the package options for the AD7817ARU?
The AD7817ARU is available in 16-SOIC and 16-TSSOP packages. - Can the AD7817ARU be used in automotive applications?
Yes, the AD7817ARU is suitable for automotive applications due to its wide operating temperature range and reliability. - How many analog input channels does the AD7817ARU have?
The AD7817ARU has four single-ended analog input channels (VIN1 to VIN4). - What is the moisture sensitivity level of the AD7817ARU?
The AD7817ARU has a moisture sensitivity level (MSL) of 1 (Unlimited).
