Overview
The MAX1402EAI+W is a low-power, multichannel, serial-output analog-to-digital converter (ADC) produced by Maxim Integrated, now part of Analog Devices Inc. This device is designed for high-precision data acquisition and features a sigma-delta modulator with a digital decimation filter to achieve 16-bit accuracy. It operates from a +5V analog supply and can also use a +3V or +5V digital supply. The MAX1402 is particularly suited for applications requiring multiple input channels, programmable gain, and low power consumption.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Resolution | 16-bit (18-bit oversampling) | |
| Input Channels | 3 fully differential, configurable as 5 pseudo-differential | |
| Gain Range | +1V/V to +128V/V | Programmable gain for each channel |
| Offset Compensation | Up to 117% of selected full-scale range | |
| Sampling Frequency | Optimized for lowest power or highest throughput | 2.4576MHz or 1.024MHz master clock |
| Data Rate | Up to 480sps | True 16-bit performance at this rate |
| Supply Voltage | +5V analog, +3V or +5V digital | |
| Package | 28-pin SSOP | |
| Operating Temperature | -40°C to +85°C (MAX1402EAI) |
Key Features
- Matched 200µA current sources for sensor excitation
- Programmable gain and offset for each channel
- Fully differential reference inputs
- Automatic channel scanning and continuous data output mode
- 3-wire serial interface—SPI™/QSPI™ compatible
- Two additional, fully differential system-calibration channels for gain and offset error correction
- Line rejection without the need for further post-filtering
Applications
The MAX1402EAI+W is suitable for a variety of applications, including:
- Industrial automation and control systems
- Medical devices requiring high precision and low power consumption
- Environmental monitoring systems
- Aerospace and defense applications where multiple input channels and high accuracy are necessary
- Data acquisition systems in various industries
Q & A
- What is the resolution of the MAX1402EAI+W ADC?
The MAX1402EAI+W has a 16-bit resolution with 18-bit oversampling.
- How many input channels does the MAX1402EAI+W have?
The device has three fully differential input channels, which can be configured as five pseudo-differential channels.
- What is the gain range of the MAX1402EAI+W?
The gain range is programmable from +1V/V to +128V/V for each channel.
- Can the MAX1402EAI+W compensate for DC offset?
- What are the operating supply voltages for the MAX1402EAI+W?
The device operates from a +5V analog supply and can use either a +3V or +5V digital supply.
- What is the maximum data rate of the MAX1402EAI+W?
The maximum data rate is up to 480 samples per second (sps) for true 16-bit performance.
- What type of interface does the MAX1402EAI+W use?
The device uses a 3-wire serial interface that is SPI™/QSPI™ compatible.
- What is the package type of the MAX1402EAI+W?
The device is available in a 28-pin SSOP package.
- What are the operating temperature ranges for the MAX1402EAI+W?
The operating temperature range is -40°C to +85°C for the MAX1402EAI model.
- Does the MAX1402EAI+W support automatic channel scanning?
