Overview
The MAX1402CAI+T is a low-power, multichannel, serial-output analog-to-digital converter (ADC) produced by Analog Devices Inc./Maxim Integrated. This device features a sigma-delta modulator with a digital decimation filter, achieving 16-bit accuracy. It is designed for applications requiring high precision and low power consumption. The MAX1402 operates from a +5V supply and offers matched 200µA current sources for sensor excitation. The device is available in a 28-pin SSOP package.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Resolution | 18-bit (16-bit accuracy) | No missing codes up to 480sps |
| Output Data Rate | Up to 480sps | Dependent on decimation factor |
| Input Channels | 3 fully differential or 5 pseudo-differential | Independently programmable gain (+1V/V to +128V/V) |
| DC Offset Compensation | Up to 117% of selected full-scale range | |
| Power Supply | +5V | |
| Quiescent Current | 250µA (operating), 2µA (power-down) | |
| Current Sources | Matched 200µA for sensor excitation | |
| Package | 28-pin SSOP |
Key Features
- 18-bit resolution with 16-bit accuracy and no missing codes up to 480sps
- Low quiescent current: 250µA in operating mode and 2µA in power-down mode
- Matched on-board current sources (200µA) for sensor excitation
- Three fully differential or five pseudo-differential signal input channels with programmable gain (+1V/V to +128V/V)
- DC offset compensation up to 117% of the selected full-scale range
- Sequential scanning of all signal inputs with minimal communications overhead
- 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+T ADC?
The MAX1402CAI+T has an 18-bit resolution with 16-bit accuracy and no missing codes up to 480sps.
- What is the power supply requirement for the MAX1402CAI+T?
The device operates from a +5V supply.
- How many input channels does the MAX1402CAI+T have?
The MAX1402CAI+T has three fully differential or five pseudo-differential input channels.
- What is the quiescent current of the MAX1402CAI+T in operating and power-down modes?
The quiescent current is 250µA in operating mode and 2µA in power-down mode.
- Does the MAX1402CAI+T have built-in current sources for sensor excitation?
Yes, it features matched 200µA current sources for sensor excitation.
- Can the MAX1402CAI+T compensate for DC offset?
Yes, it can compensate an input-referred DC offset up to 117% of the selected full-scale range.
- What package type is the MAX1402CAI+T available in?
The device is available in a 28-pin SSOP package.
- How does the MAX1402CAI+T handle line rejection?
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 post-filtering.
- What are some typical applications of the MAX1402CAI+T?
Typical applications include portable industrial instruments, portable weigh scales, loop-powered systems, and pressure transducers.
- Is there an evaluation kit available for the MAX1402CAI+T?
Yes, an evaluation kit (EV kit) and a complete evaluation system (EV system) are available for comprehensive evaluation of the MAX1402CAI+T.
