Overview
The AD7715ARU-3REEL7 is a high-precision analog-to-digital converter (ADC) designed by Analog Devices, Inc. This integrated circuit is part of the AD7715 series, which is optimized for low-frequency measurement applications. The AD7715ARU-3REEL7 features a 24-bit sigma-delta conversion technique, providing high resolution and accuracy. It operates from a single 3 V supply and is housed in a 16-lead Thin Shrink Small Outline (TSSOP) package. This device is ideal for use in smart, microcontroller, or DSP-based systems due to its low power consumption and comprehensive signal conditioning capabilities.
Key Specifications
| Parameter | Value | Unit | Conditions/Comments |
|---|---|---|---|
| Resolution | 24-bit | ||
| Supply Voltage | 3 V (AD7715-3), 5 V (AD7715-5) | V | For specified performance |
| Supply Current | 450 μA (max @ 3 V) | μA | fCLK IN = 1 MHz |
| Standby Current | 10 μA (typ) | μA | |
| Analog Input Range | Unipolar: 0 mV to 20 mV, 0 mV to 80 mV, 0 V to 1.25 V, 0 V to 2.5 V; Bipolar: ±20 mV, ±80 mV, ±1.25 V, ±2.5 V | V | Referenced to the negative input of the differential analog input |
| Signal-to-Noise Ratio | 85 dB (min @ 10 Hz) | dB | |
| Update Rate | 50 Hz to 600 Hz | Hz | Programmable |
| Package Type | 16-lead TSSOP | ||
| Operating Temperature Range | −40°C to +85°C | °C |
Key Features
- Programmable Gain Amplifier: Allows the device to accept input signals directly from transducers or strain gages, reducing the need for additional signal conditioning circuits.
- Low Power Consumption: Consumes less than 450 μA at 3 V supplies, making it suitable for low-power systems.
- High Noise Performance: Features a high signal-to-noise ratio of 85 dB minimum at 10 Hz.
- Internal Buffer and Reference: Includes an internal buffer and reference, enhancing the device's stability and performance consistency.
- Serial Interface: Supports a three-wire serial interface, reducing the number of interconnect lines and optocouplers required in isolated systems.
- Power-Down Option: Reduces standby power consumption to 50 μW typical.
- Self-Calibration and System Calibration: Options to eliminate gain and offset errors on the device itself or in the system.
Applications
The AD7715ARU-3REEL7 is designed for various low-frequency measurement applications, including:
- Industrial Automation: Suitable for use in industrial control systems and automation equipment.
- Medical Devices: Ideal for medical equipment requiring high precision and low noise.
- Smart Sensors: Used in smart sensor systems that require accurate and reliable data conversion.
- Microcontroller and DSP-Based Systems: Compatible with microcontroller and DSP-based systems due to its serial interface and low power consumption.
Q & A
- What is the resolution of the AD7715ARU-3REEL7?
The AD7715ARU-3REEL7 has a 24-bit resolution. - What are the supply voltage options for the AD7715ARU-3REEL7?
The device can operate from a single 3 V or 5 V supply. - What is the typical supply current of the AD7715ARU-3REEL7 at 3 V?
The typical supply current is less than 450 μA at 3 V supplies. - What is the operating temperature range of the AD7715ARU-3REEL7?
The operating temperature range is −40°C to +85°C. - What types of analog input ranges does the AD7715ARU-3REEL7 support?
The device supports both unipolar and bipolar analog input ranges, including 0 mV to 20 mV, 0 mV to 80 mV, 0 V to 1.25 V, and 0 V to 2.5 V for unipolar, and ±20 mV, ±80 mV, ±1.25 V, and ±2.5 V for bipolar. - Does the AD7715ARU-3REEL7 have a power-down option?
Yes, the device has a power-down option that reduces the standby power consumption to 50 μW typical. - What is the signal-to-noise ratio of the AD7715ARU-3REEL7?
The signal-to-noise ratio is 85 dB minimum at 10 Hz. - What is the update rate range of the AD7715ARU-3REEL7?
The update rate is programmable and ranges from 50 Hz to 600 Hz. - What package type is the AD7715ARU-3REEL7 available in?
The device is available in a 16-lead TSSOP package. - Does the AD7715ARU-3REEL7 support self-calibration and system calibration?
Yes, the device supports both self-calibration and system calibration options to eliminate gain and offset errors.
