Overview
The MAX1403CAI+ is an 18-bit, low-power, multichannel, serial-output analog-to-digital converter (ADC) produced by Analog Devices Inc./Maxim Integrated. This device features matched 200µA current sources for sensor excitation and utilizes a sigma-delta modulator with a digital decimation filter to achieve high accuracy. The MAX1403 operates from a supply voltage range of +2.7V to +3.6V, making it suitable for a variety of low-power applications.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Resolution | 18 bits | |
| Number of Channels | 3 fully differential / 5 pseudo-differential | |
| Gain Range | +1V/V to +128V/V | Programmable gain for each channel |
| Output Data Rate | Up to 480sps | True 16-bit performance at this rate |
| Supply Voltage | +2.7V to +3.6V | Analog and digital supplies |
| Package | 28-pin SSOP | |
| Interface | SPI™/QSPI™-Compatible 3-Wire Serial Interface | |
| Current Sources | Matched 200µA for sensor excitation |
Key Features
- Uses a sigma-delta modulator with a digital decimation filter for high accuracy.
- User-selectable decimation factor to trade off between resolution and output data rate.
- Programmable gain between +1V/V and +128V/V for each channel.
- Compensates for input-referred DC offset up to 117% of the selected full-scale range.
- Two additional fully differential calibration channels for gain and offset error correction.
- Automatic channel scanning and continuous data output mode.
- Operates with analog and digital supplies from +2.7V to +3.6V.
- SPI™/QSPI™-Compatible 3-Wire Serial Interface.
Applications
The MAX1403CAI+ is suitable for various applications requiring high-accuracy, low-power, multichannel data acquisition. These include:
- Industrial automation and control systems.
- Medical devices and diagnostic equipment.
- Environmental monitoring and sensor systems.
- Aerospace and defense applications requiring precise data conversion.
- Automotive systems needing robust and accurate data acquisition.
Q & A
- What is the resolution of the MAX1403CAI+ ADC?
The MAX1403CAI+ has an 18-bit resolution.
- How many input channels does the MAX1403CAI+ support?
The device supports three fully differential or five pseudo-differential input channels.
- What is the gain range of the MAX1403CAI+?
The gain can be programmed between +1V/V and +128V/V for each channel.
- What is the maximum output data rate of the MAX1403CAI+?
The maximum output data rate is up to 480sps, achieving true 16-bit performance at this rate.
- What is the supply voltage range for the MAX1403CAI+?
The device operates from +2.7V to +3.6V for both analog and digital supplies.
- What type of package does the MAX1403CAI+ come in?
The MAX1403CAI+ is available in a 28-pin SSOP package.
- What type of interface does the MAX1403CAI+ use?
The device uses an SPI™/QSPI™-Compatible 3-Wire Serial Interface.
- Does the MAX1403CAI+ have built-in current sources for sensor excitation?
Yes, it features matched 200µA current sources for sensor excitation.
- Can the MAX1403CAI+ compensate for DC offset?
Yes, it can compensate for an input-referred DC offset up to 117% of the selected full-scale range.
- Does the MAX1403CAI+ support automatic channel scanning?
Yes, it supports automatic channel scanning and continuous data output mode.
