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The MAX14001AAP is a configurable isolated 10-bit analog-to-digital converter (ADC) suitable for multi-range binary input signals.

Its main features include:

The MAX14001AAP supports reliable detection of binary input:

Programmable input bias current suppresses line noise

3.75kVRMS isolation, lasting for 60 seconds

5.5mm creepage distance and clearance

Class II CTI grade packaging materials

MAX14001AAP highly integrated reduces BOM and circuit board space:

10-bit, 10ksps ADC

Binary threshold comparator

The control circuit for driving the depletion-mode FET

Dual isolation of data and DC-DC power supply

20-SSOP packaging

MAX14001AAP improves equipment "running time" and simplifies system maintenance:

Support on-site side diagnosis

Automatic self-check

The MAX14001AAP has unparalleled flexibility:

Programmable input threshold upper and lower limits

Programmable surge current activation threshold, amplitude and duration

Daisy chains are connected to the SPI interface

Application scenarios

The MAX14001AAP is suitable for application scenarios that require high-precision and low-power isolated ADCs, including:

Distribution automation

High-voltage binary input (12V - 300V)

Industrial control, multi-range, digital input module, independent isolated input

Substation automation

Overview

The MAX14001AAP is an isolated, single-channel analog-to-digital converter (ADC) with a programmable voltage comparator and surge current control, optimized for configurable binary input applications. The MAX14001AAP offers 3.75kVRMS integrated isolation on the binary input side (field side) and the comparator output /SPI side (logic side). Integrated, isolated, DC-DC converters power all field-side circuits, so field-side diagnostics can be performed even without input signals. The 20-pin SSOP package offers a creepage distance and clearance of 5.5mm, with a Class II CTI rating.

The MAX14001AAP continuously digitizes the input voltage on the field side of the isolation barrier and sends the data to the logic side of the device through the isolation barrier. Then, the input voltage can be compared with the programmable threshold. If the input voltage is higher than the upper limit or lower than the lower limit, the output pin of the binary comparator is at a high level. When filtering is prohibited, the response time of the comparator to input changes is less than 150μs. When enabling filtering, the comparator adopts the moving average of the latest 2, 4 or 8 ADC readings. Both filtered and unfiltered ADC readings are provided through the 5MHz SPI port, which is also used to set comparator thresholds and other device configurations.

The MAX14001AAP controls the current of the binary input through an external, high-voltage FET. This current cleans the relay contacts and attenuates the input noise. The surge comparator that monitors the ADC reading triggers the surge current or wetting pulse. The surge trigger threshold, current amplitude and current duration are all programmable in the MAX14001AAP, but they are fixed values in the MAX14002. When the high-voltage FET does not provide inrush current, switch to bias voltage mode. The bias mode provides a small current load on the binary input to attenuate the capacitive coupling noise. In the MAX14001AAP, the bias current can be programmed within the range of 50μA to 3.75mA. This allows for the best balance between noise attenuation and power consumption.

Basic information

Model: MAX14001AAP

Digit number: 10

Sampling rate (per second) : 10k

Input number: 1

Input type: Single-ended

Data interface: SPI

Configuration: S/H-ADC

Ratio -S /H:ADC: 1:1

Number of A/D converters: 1

Architecture: SAR

Reference types: External, Internal

Voltage - Power supply, simulation: 3V to 3.6V

Voltage - Power supply, digital: 1.71V to 5.5V

Feature: -

Operating temperature: -40°C to 125°C

Package/Shell: 20-SSOP

Installation type: Surface mount type

If you need to know more about the specific price of [MAX14001AAP] products, you can visit the official website of Mingjiada Electronics (www.hkmjd.com).