Overview
The MAX1402EAI+ 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 MAX1402EAI+ utilizes a sigma-delta modulator with a digital decimation filter to achieve 16-bit accuracy and an 18-bit resolution. It operates from a +5V supply and features matched 200µA current sources for sensor excitation.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 18 bits |
| Accuracy | 16 bits with no missing codes up to 480sps |
| Output Data Rate | Up to 480sps |
| Quiescent Current | 250µA (operating mode), 2µA (power-down mode) |
| Supply Voltage | +5V |
| Digital Supply Voltage | 2.7V to 5.25V |
| Operating Temperature | -40°C to +85°C |
| Input Channels | 3 fully differential or 5 pseudo-differential |
| Gain Range | +1V/V to +128V/V |
| Package Type | 28-pin SSOP |
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
- User-selectable decimation factor for adjustable conversion resolution and output data rate
- Programmable gain between +1V/V and +128V/V
- Compensation for input-referred DC offset up to 117% of the selected full-scale range
- 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 and accuracy of the MAX1402EAI+ ADC?
The MAX1402EAI+ has an 18-bit resolution and achieves 16-bit accuracy with no missing codes up to 480sps.
- What is the quiescent current of the MAX1402EAI+ in operating and power-down modes?
The quiescent current is 250µA in operating mode and 2µA in power-down mode.
- What type of input channels does the MAX1402EAI+ offer?
The MAX1402EAI+ offers three fully differential or five pseudo-differential signal input channels.
- What is the gain range of the MAX1402EAI+?
The gain range is programmable between +1V/V and +128V/V.
- How does the MAX1402EAI+ 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 is the operating temperature range of the MAX1402EAI+?
The operating temperature range is -40°C to +85°C.
- What package type is the MAX1402EAI+ available in?
The MAX1402EAI+ is available in a 28-pin SSOP package.
- Can the MAX1402EAI+ compensate for input-referred DC offset?
Yes, it can compensate for an input-referred DC offset up to 117% of the selected full-scale range.
- What are some common applications of the MAX1402EAI+?
Common applications include portable industrial instruments, portable weigh scales, loop-powered systems, and pressure transducers.
- Is the MAX1402EAI+ suitable for low-power applications?
Yes, the MAX1402EAI+ is designed for low-power applications, making it suitable for battery-powered devices and other low-power systems.
