Overview
The MAX14002AAP+T, produced by Analog Devices Inc./Maxim Integrated, is an isolated, single-channel analog-to-digital converter (ADC) designed with programmable voltage comparators and inrush current control. This device is optimized for configurable binary input applications and features integrated isolation, making it suitable for high-density, multi-range, individually isolated binary input modules. The MAX14002AAP+T includes an integrated, isolated DC-DC converter that powers all field-side circuitry, enabling field-side diagnostics even without an input signal.
Key Specifications
| Parameter | Value |
|---|---|
| ADC Resolution | 10-bit |
| ADC Architecture | SAR (Successive Approximation Register) |
| Nominal Sampling Rate | 10 ksps |
| Input Voltage Range | 0V to +1.25V with respect to AGND |
| Isolation Voltage | 3.75 kVRMS |
| Package Type | 20-pin SSOP |
| Creepage and Clearance | 5.5 mm with Group II CTI rating |
| SPI Interface | 5 MHz |
| Comparator Response Time | < 150 µs (without filtering) |
| Inrush Current Control | Programmable (fixed in MAX14002) |
| Bias Current Range | 50 µA to 3.75 mA |
Key Features
- Integrated, isolated DC-DC converter for powering field-side circuitry.
- Programmable voltage comparators with adjustable thresholds.
- Programmable inrush current for cleaning relay contacts (fixed in MAX14002).
- Programmable input bias current to reduce capacitively coupled noise.
- 5 MHz SPI interface for data transmission and device configuration.
- Filtered and unfiltered ADC readings available.
- High-voltage FET control for inrush current and bias mode.
- Isolation barrier with 3.75 kVRMS integrated isolation.
Applications
The MAX14002AAP+T is ideally suited for various industrial and automation applications, including:
- High-density, multi-range, individually isolated binary input modules.
- Industrial control systems requiring isolated ADCs.
- Relay contact cleaning and noise attenuation in binary input applications.
- Field-side diagnostics in power systems and industrial automation.
Q & A
- What is the resolution of the ADC in the MAX14002AAP+T?
The ADC resolution is 10-bit. - What is the nominal sampling rate of the ADC?
The nominal sampling rate is 10 ksps. - What is the input voltage range of the ADC?
The input voltage range is 0V to +1.25V with respect to AGND. - What is the isolation voltage provided by the MAX14002AAP+T?
The isolation voltage is 3.75 kVRMS. - How does the device control inrush current?
The device controls inrush current through an external high-voltage FET, with programmable thresholds, magnitude, and duration (fixed in MAX14002). - What is the purpose of the bias current in the MAX14002AAP+T?
The bias current is used to attenuate capacitively coupled noise and is programmable between 50 µA and 3.75 mA. - How does the MAX14002AAP+T communicate with other devices?
The device communicates through a 5 MHz SPI interface. - What is the response time of the comparator in the MAX14002AAP+T?
The response time of the comparator is less than 150 µs without filtering. - Can the MAX14002AAP+T perform field-side diagnostics without an input signal?
Yes, the integrated, isolated DC-DC converter allows for field-side diagnostics even without an input signal. - What is the package type of the MAX14002AAP+T?
The package type is a 20-pin SSOP.
