Overview
The MAX1403EAI+T, produced by Analog Devices Inc./Maxim Integrated, is an 18-bit, low-power, multichannel, serial-output analog-to-digital converter (ADC). This device features a sigma-delta modulator with a digital decimation filter, enabling it to achieve 16-bit accuracy. It is designed for applications requiring high precision and flexibility, with matched 200µA current sources for sensor excitation. The MAX1403 operates from a supply voltage range of +2.7V to +3.6V, making it suitable for a variety of low-power systems.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Resolution | 18-bit | True 16-bit performance at up to 480sps |
| Input Channels | 3 fully differential or 5 pseudo-differential | Independently programmable gain between +1V/V and +128V/V |
| Calibration Channels | 2 fully differential | For gain and offset error correction |
| Supply Voltage | +2.7V to +3.6V | Analog and digital supplies |
| Current Sources | Matched 200µA | For sensor excitation |
| Output Data Rate | Up to 480sps | Dependent on decimation factor |
| Interface | SPI™/QSPI™-Compatible 3-Wire Serial Interface | |
| Package | 28-Pin SSOP |
Key Features
- Uses a sigma-delta modulator with a digital decimation filter to achieve high accuracy.
- User-selectable decimation factor allows for trade-off between conversion resolution and output data rate.
- Programmable gain and offset compensation for input channels.
- Automatic channel scanning and continuous data output mode.
- Excellent line rejection without the need for further postfiltering.
- Fully differential reference inputs.
- Operates continuously or on command.
Applications
The MAX1403EAI+T is suitable for various applications requiring high precision and low power consumption, such as:
- Industrial automation and control systems.
- Medical devices and diagnostic equipment.
- Aerospace and defense systems.
- Automotive systems, particularly those requiring precise sensor data.
- Data acquisition systems in scientific and research environments.
Q & A
- What is the resolution of the MAX1403EAI+T ADC?
The MAX1403EAI+T has an 18-bit resolution, with true 16-bit performance achievable at up to 480sps.
- How many input channels does the MAX1403EAI+T have?
The device has three fully differential input channels or five pseudo-differential input channels.
- What is the supply voltage range for the MAX1403EAI+T?
The supply voltage range is from +2.7V to +3.6V for both analog and digital supplies.
- Does the MAX1403EAI+T have built-in current sources for sensor excitation?
Yes, it features matched 200µA current sources for sensor excitation.
- What type of interface does the MAX1403EAI+T use?
The device uses an SPI™/QSPI™-Compatible 3-Wire Serial Interface.
- How is the line rejection handled in the MAX1403EAI+T?
The device can be programmed to produce zeros in its frequency response at the line frequency and associated harmonics, ensuring excellent line rejection without further postfiltering.
- What is the package type of the MAX1403EAI+T?
The device is available in a 28-Pin SSOP package.
- Can the MAX1403EAI+T operate continuously or on command?
Yes, it can operate continuously or on command.
- Does the MAX1403EAI+T support automatic channel scanning?
Yes, it supports automatic channel scanning and continuous data output mode.
- What are the calibration capabilities of the MAX1403EAI+T?
The device includes two fully differential calibration channels for gain and offset error correction.
