Overview
The MAX1400CAI+T is a 18-bit, low-power, multichannel, oversampling (sigma-delta) analog-to-digital converter (ADC) produced by Analog Devices Inc./Maxim Integrated. This ADC utilizes a sigma-delta modulator with a digital decimation filter to achieve true 16-bit accuracy at an output data rate of up to 480 samples per second (SPS). The device is housed in a 28-pin SSOP package and operates with a +5V analog supply and +3V or +5V digital supply. It features programmable gain and offset, fully differential reference inputs, and automatic channel scanning with continuous data output mode.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Resolution | 18-bit | |
| Sampling Rate | Up to 480 SPS | |
| Input Channel Type | Differential/Pseudo-Differential | |
| Supply Voltage Range | 4.75V to 5.25V | V |
| Operating Temperature Range | 0°C to 70°C | °C |
| Quiescent Current (Operating Mode) | 250 µA | µA |
| Quiescent Current (Power-Down Mode) | 2 µA | µA |
| Data Interface | SPI/QSPI Compatible 3-Wire Serial Interface | |
| Package Type | 28-Pin SSOP |
Key Features
- Three fully differential input channels with programmable gain between +1V/V and +128V/V, and five pseudo-differential input channels configuration option.
- Two additional fully differential system-calibration channels for gain and offset error correction.
- External access to the multiplexer output for additional signal processing.
- Automatic channel scanning and continuous data output mode.
- User-selectable decimation factor for adjustable conversion resolution and output data rate.
- Low power dissipation with 250 µA in operating mode and 2 µA in power-down mode.
- SPI/QSPI compatible 3-wire serial interface.
Applications
- Signal processing in various industrial and medical devices.
- Portable devices requiring low power consumption and high accuracy ADCs.
Q & A
- What is the resolution of the MAX1400CAI+T ADC?
The MAX1400CAI+T has an 18-bit resolution.
- What is the maximum sampling rate of the MAX1400CAI+T?
The maximum sampling rate is up to 480 SPS.
- What types of input channels does the MAX1400CAI+T support?
The device supports three fully differential and five pseudo-differential input channels.
- What is the operating temperature range of the MAX1400CAI+T?
The operating temperature range is from 0°C to 70°C.
- What is the quiescent current in operating and power-down modes?
The quiescent current is 250 µA in operating mode and 2 µA in power-down mode.
- What type of data interface does the MAX1400CAI+T use?
The device uses an SPI/QSPI compatible 3-wire serial interface.
- What is the package type of the MAX1400CAI+T?
The device is housed in a 28-pin SSOP package.
- Does the MAX1400CAI+T support automatic channel scanning?
Yes, it supports automatic channel scanning and continuous data output mode.
- Can the gain and offset of the input channels be programmed?
Yes, the gain can be programmed between +1V/V and +128V/V, and it can compensate an input-referred DC offset up to 117% of the selected full-scale range.
- Are there any additional calibration channels available?
Yes, two additional fully differential system-calibration channels are provided for gain and offset error correction.
