Overview
The AD7715AN-5, produced by Analog Devices Inc., is a complete analog front end designed for low-frequency measurement applications. This 16-bit Sigma-Delta Analog-to-Digital Converter (ADC) is capable of accepting low-level input signals directly from transducers and outputs a serial digital word. It employs a Sigma-Delta conversion technique to achieve up to 16 bits of no missing codes performance. The AD7715 features a proprietary programmable gain front end and an on-chip digital filter, allowing for adjustable filter cutoff and output update rates. It operates from a single 3 V or 5 V supply and is ideal for use in smart, microcontroller, or DSP-based systems.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 16 bits |
| 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 | 1, 2, 32, 128 |
| Nonlinearity | ±0.0015% |
| RMS Noise | <550 nV |
| Package Types | 16-lead PDIP, SOIC, TSSOP |
| Serial Interface | SPI-, QSPI™-, MICROWIRE™-, and DSP-compatible |
Key Features
- Differential analog input and differential reference input
- Programmable gain front end with gains of 1, 2, 32, and 128
- Low-pass filter with programmable output update rate
- Three-wire serial interface for reduced interconnect lines and optocouplers in isolated systems
- Self-calibration and system calibration options to eliminate gain and offset errors
- CMOS construction for low power dissipation; standby power consumption of 50 µW typical
- Ability to buffer the analog input
- Low supply current and low standby current
Applications
The AD7715AN-5 is ideal for various applications, including:
- Low-frequency measurement systems
- Smart systems
- Microcontroller-based systems
- DSP-based systems
- Transducer and sensor interfaces
- Industrial control systems
- Medical devices requiring precise analog-to-digital conversion
Q & A
- What is the resolution of the AD7715AN-5?
The AD7715AN-5 has a resolution of 16 bits.
- What are the supply voltage options for the AD7715AN-5?
The AD7715AN-5 operates from a single 3 V or 5 V supply.
- What is the maximum supply current of the AD7715AN-5 at 3 V supplies?
The maximum supply current is 450 µA.
- What are the input signal ranges supported by the AD7715AN-5?
The AD7715AN-5 supports 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 types of packages are available for the AD7715AN-5?
The AD7715AN-5 is available in 16-lead PDIP, SOIC, and TSSOP packages.
- Does the AD7715AN-5 support serial communication?
Yes, it features a three-wire serial interface compatible with SPI, QSPI™, MICROWIRE™, and DSP systems.
- How does the AD7715AN-5 handle gain and offset errors?
The AD7715AN-5 includes self-calibration and system calibration options to eliminate gain and offset errors.
- What is the standby power consumption of the AD7715AN-5?
The standby power consumption is 50 µW typical.
- Is the AD7715AN-5 suitable for low-power systems?
Yes, it is designed for low-power systems with low supply current and low standby current.
- Can the AD7715AN-5 buffer the analog input?
Yes, the AD7715AN-5 has the ability to buffer the analog input.
