Overview
The AD7175-8BCPZ-RL, produced by Analog Devices Inc., is a low noise, fast settling, multiplexed, 8-/16-channel (fully/pseudo differential) Σ-Δ analog-to-digital converter (ADC) designed for low bandwidth inputs. This ADC is highly configurable, allowing users to set up individual configurations for each analog input channel. It features integrated true rail-to-rail buffers on the analog inputs and external reference inputs, making it easy to drive high impedance inputs. The device also includes a precision 2.5 V low drift internal reference, reducing the need for external components. The AD7175-8 operates over a wide temperature range of -40°C to +105°C and is available in a 40-lead LFCSP package.
Key Specifications
| Specification | Value |
|---|---|
| Number of Channels | 8 fully differential or 16 single-ended |
| Resolution | 24 bits |
| Maximum Channel Scan Rate | 50 kSPS (20 µs) |
| Output Data Rates | 5 SPS to 250 kSPS |
| Analog Input Type | Fully differential or single-ended relative to any analog input |
| Internal Reference | 2.5 V low drift (±2 ppm/°C) band gap internal reference |
| Power Supplies | AVDD1 (5 V or ±2.5 V), AVDD2 (2 V to 5.5 V), IOVDD (1.8 V digital LDO regulator) |
| Operating Temperature Range | -40°C to +105°C |
| Package Type | 40-Lead LFCSP (6mm x 6mm w/ EP) |
Key Features
- Integrated true rail-to-rail buffers on the analog inputs and external reference inputs
- Per channel configurability: gain and offset correction, filter type, output data rate, and reference source selection
- Digital filter allowing simultaneous 50 Hz and 60 Hz rejection at a 27.27 SPS output data rate
- Fast scanning of analog input channels using the internal multiplexer or an external multiplexer with automatic control from the GPIOs
- High resolution at lower speeds in either channel scanning or ADC per channel applications
- Precision 2.5 V low drift internal reference with output reference buffer
Applications
The AD7175-8 is suitable for various applications requiring high precision and configurability, such as industrial automation, medical devices, and test and measurement equipment. Its ability to handle low bandwidth inputs and provide high resolution at lower speeds makes it ideal for applications that require accurate analog-to-digital conversion with minimal external component count.
Q & A
- What is the maximum channel scan rate of the AD7175-8?
The maximum channel scan rate is 50 kSPS (20 µs) for fully settled data. - What is the resolution of the AD7175-8?
The resolution is 24 bits. - What types of analog inputs does the AD7175-8 support?
The AD7175-8 supports 8 fully differential or 16 single-ended analog inputs. - What is the operating temperature range of the AD7175-8?
The operating temperature range is -40°C to +105°C. - What are the power supply requirements for the AD7175-8?
The device requires three independent power supplies: AVDD1 (5 V or ±2.5 V), AVDD2 (2 V to 5.5 V), and IOVDD (1.8 V digital LDO regulator). - Does the AD7175-8 have an internal reference?
Yes, it includes a precision 2.5 V low drift (±2 ppm/°C) band gap internal reference. - What package type is the AD7175-8 available in?
The AD7175-8 is available in a 40-Lead LFCSP package. - Can the AD7175-8 reject 50 Hz and 60 Hz noise simultaneously?
Yes, the digital filter allows simultaneous 50 Hz and 60 Hz rejection at a 27.27 SPS output data rate. - Is the AD7175-8 highly configurable?
Yes, it allows per channel configurability for features such as gain and offset correction, filter type, output data rate, and reference source selection. - What are some typical applications for the AD7175-8?
Typical applications include industrial automation, medical devices, and test and measurement equipment.
