Overview
The MAX1402CAI+ is a low-power, multichannel, serial-output analog-to-digital converter (ADC) produced by Analog Devices Inc./Maxim Integrated. This device is designed for high accuracy and low power consumption, making it suitable for various industrial and portable applications. The MAX1402 uses a sigma-delta modulator with a digital decimation filter to achieve 16-bit accuracy and operates from a +5V supply. It features matched on-board current sources for sensor excitation and offers flexible configuration options for input channels and gain settings.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 18-bit |
| Accuracy | 16-bit accuracy with no missing codes up to 480sps |
| Quiescent Current | 250µA (operating mode), 2µA (power-down mode) |
| Input Channels | 3 fully differential or 5 pseudo-differential |
| Gain Range | +1V/V to +128V/V |
| DC Offset Compensation | Up to 117% of the selected full-scale range |
| Supply Voltage | +5V |
| Package | 28-pin SSOP |
| Master Clock Frequency | 2.4576MHz or 1.024MHz |
Key Features
- 18-bit resolution, sigma-delta ADC with 16-bit accuracy and no missing codes up to 480sps
- Low quiescent current: 250µA (operating mode) and 2µA (power-down mode)
- Matched on-board current sources (200µA) for sensor excitation
- Three fully differential or five pseudo-differential signal input channels
- Gain range from +1V/V to +128V/V
- DC offset compensation up to 117% of the selected full-scale range
- Two additional fully differential system-calibration channels for gain and offset error correction
- Programmable digital decimation filter to optimize for lowest power dissipation or highest throughput rate
- Excellent line rejection without further post-filtering when used with specific master clock frequencies
Applications
- Portable industrial instruments
- Portable weigh scales
- Loop-powered systems
- Pressure transducers
Q & A
- What is the resolution of the MAX1402CAI+ ADC?
The MAX1402CAI+ has an 18-bit resolution. - What is the accuracy of the MAX1402CAI+ at 480sps?
The MAX1402CAI+ achieves 16-bit accuracy with no missing codes up to 480sps. - What is the quiescent current of the MAX1402CAI+ in operating and power-down modes?
The quiescent current is 250µA in operating mode and 2µA in power-down mode. - How many input channels does the MAX1402CAI+ offer?
The device offers three fully differential or five pseudo-differential input channels. - What is the gain range of the input channels?
The gain range is from +1V/V to +128V/V. - What type of package is the MAX1402CAI+ available in?
The MAX1402CAI+ is available in a 28-pin SSOP package. - What are the master clock frequencies supported by the MAX1402CAI+?
The device supports master clock frequencies of 2.4576MHz or 1.024MHz. - Does the MAX1402CAI+ have built-in current sources for sensor excitation?
Yes, it features matched on-board current sources (200µA) for sensor excitation. - Can the MAX1402CAI+ compensate for DC offset?
Yes, it can compensate an input-referred DC offset up to 117% of the selected full-scale range. - What are some common applications of the MAX1402CAI+?
Common applications include portable industrial instruments, portable weigh scales, loop-powered systems, and pressure transducers.
