Overview
The AD7715ARU-5 is a high-precision, 16-bit sigma-delta analog-to-digital converter (ADC) produced by Analog Devices Inc. This component is designed as a complete analog front end for low-frequency measurement applications. It can accept low-level input signals directly from transducers and outputs a serial digital word. The AD7715 employs a sigma-delta (Σ-Δ) conversion technique to achieve up to 16 bits of no missing codes performance. It features a programmable gain front end, differential analog and reference inputs, and operates from a single supply voltage of either 3 V or 5 V.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 16 |
| Supply Voltage | 3 V or 5 V |
| Supply Current | 450 µA maximum @ 3 V supplies |
| Input Signal Ranges (Unipolar) | 0 mV to 20 mV, 0 mV to 80 mV, 0 V to 1.25 V, 0 V to 2.5 V |
| Input Signal Ranges (Bipolar) | ±20 mV, ±80 mV, ±1.25 V, ±2.5 V |
| Programmable Gain | Gains of 1, 2, 32, and 128 |
| Output Update Rate | 50 Hz to 600 Hz |
| Package Type | 16-lead TSSOP, SOIC, PDIP |
| Operating Temperature Range | -40°C to +85°C |
| Nonlinearity | ±0.0015% FSR |
| Signal-to-Noise Ratio (SNR) | 85 dB min @ 10 Hz |
Key Features
- Programmable gain front end with gains of 1, 2, 32, and 128.
- Differential analog and reference inputs.
- Low supply current: 450 µA maximum at 3 V supplies.
- Low-pass filter with programmable output update rate.
- Three-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP.
- Self-calibration and system calibration options to eliminate gain and offset errors.
- Power-down mode reducing standby power consumption to 50 µW typical.
- High noise performance with low rms noise (<550 nV).
- Internal buffer and reference.
Applications
The AD7715ARU-5 is ideal for use in various applications, including:
- Smart, microcontroller, or DSP-based systems.
- Low-frequency measurement applications such as those involving transducers and strain gauges.
- Industrial automation and control systems.
- Medical devices requiring high precision analog-to-digital conversion.
- Automotive and aerospace systems where low power consumption and high accuracy are critical.
Q & A
- What is the resolution of the AD7715ARU-5?
The AD7715ARU-5 has a resolution of 16 bits.
- What are the supply voltage options for the AD7715ARU-5?
The AD7715ARU-5 can operate from a single supply voltage of either 3 V or 5 V.
- What are the input signal ranges supported by the AD7715ARU-5?
The AD7715ARU-5 can handle unipolar input signal ranges of 0 mV to 20 mV, 0 mV to 80 mV, 0 V to 1.25 V, and 0 V to 2.5 V, as well as bipolar ranges of ±20 mV, ±80 mV, ±1.25 V, and ±2.5 V.
- What is the maximum supply current of the AD7715ARU-5 at 3 V supplies?
The maximum supply current is 450 µA at 3 V supplies.
- What types of packages are available for the AD7715ARU-5?
The AD7715ARU-5 is available in 16-lead TSSOP, SOIC, and PDIP packages.
- What is the operating temperature range of the AD7715ARU-5?
The operating temperature range is -40°C to +85°C.
- Does the AD7715ARU-5 support self-calibration?
Yes, the AD7715ARU-5 supports self-calibration and system calibration options to eliminate gain and offset errors.
- What is the signal-to-noise ratio (SNR) of the AD7715ARU-5?
The SNR is 85 dB minimum at 10 Hz.
- Is the AD7715ARU-5 compatible with various serial interfaces?
Yes, it is compatible with SPI, QSPI, MICROWIRE, and DSP interfaces.
- What is the standby power consumption of the AD7715ARU-5 in power-down mode?
The standby power consumption is 50 µW typical in power-down mode.
