MAX14002AAP+ by Analog Devices

Configurable, Isolated 10-bit ADCs for Multi-Range Binary Inputs

Status: Active
Series: MAX14002
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock
The MAX14001/MAX14002 are isolated, single-channel analog-to-digital converters (ADCs) with programmable voltage comparators and inrush current control optimized for configurable binary input applications. 3.75kVRMS of integrated isolation is provided between the binary input side (field-side) and the comparator output/SPI-side (logic-side) of the MAX14001/MAX14002. An integrated, isolated, DC-DC converter powers all field-side circuitry, and this allows running field-side diagnostics even when no input signal is present. The 20-pin SSOP package provides 5.5mm of creepage and clearance with group II CTI rating. These devices continually digitize the input voltage on the field-side of an isolation barrier and transmit the data across the isolation barrier to the logic-side of the device where the magnitude of the input voltage is compared to programmable thresholds. The binary comparator output pin is high when the input voltage is above the upper threshold and low when it is below the lower threshold. Response time of the comparator to an input change is less than 150μs with filtering disabled. With filtering enabled, the comparator uses the moving average of the last 2, 4, or 8 ADC readings. Both filtered and unfiltered ADC readings are available through the 5MHz SPI port, which is also used to set comparator thresholds and other device configuration. The MAX14001/MAX14002 control the current of a binary input through an external, high-voltage FET. This current cleans relay contacts and attenuates input noise. An inrush comparator monitoring the ADC readings triggers the inrush current, or wetting pulse. The inrush trigger threshold, current magnitude, and current duration are all programmable in the MAX14001 but are fixed in the MAX14002. When the high-voltage FET is not providing inrush current, it switches to bias mode. Bias mode places a small current load on the binary input to attenuate capacitively coupled noise. The level of bias current is programmable between 50μA and 3.75mA in both the MAX14001 and MAX14002. This allows optimization of the tradeoff between noise attenuation and power dissipation. Design Solution: Isolated ADC with Integrated DC-DC Converter Simplifies Field-Side Circuitry ›

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Features

Enables Robust Detection of Binary Inputs Programmable Input Bias Current Rejects Line Noise 3.75kVRMS of Isolation for 60 Seconds 5.5mm of Creepage and Clearance Group II CTI Package Material
Programmable Input Bias Current Rejects Line Noise
3.75kVRMS of Isolation for 60 Seconds
5.5mm of Creepage and Clearance
Group II CTI Package Material
Reduces BOM and Board Space Through High Integration 10-bit, 10ksps ADC Binary Threshold Comparators Control Circuit for Driving a Depletion Mode FET Isolation for Both Data and DC-DC Supply 20-SSOP Package
10-bit, 10ksps ADC
Binary Threshold Comparators
Control Circuit for Driving a Depletion Mode FET
Isolation for Both Data and DC-DC Supply
20-SSOP Package
Increases Equipment “Up Time” and Simplifies System Maintenance Enables Field-Side Diagnostics Automatic Self-Diagnostics
Enables Field-Side Diagnostics
Automatic Self-Diagnostics
Provides Unparalleled Flexibility Programmable Upper and Lower Input Thresholds Programmable Inrush Current Activation Threshold, Magnitude, and Duration Daisy-Chainable SPI Interface
Programmable Upper and Lower Input Thresholds
Programmable Inrush Current Activation Threshold, Magnitude, and Duration
Daisy-Chainable SPI Interface

Specifications

Sensor Interface Type Multi-level Binary Input
µC Interface Type ParallelSPI
# Channels 1
VSUPPLY (V) (min) 3
VSUPPLY (V) (max) 3.6
ISUPPLY (µA) (typ) 4800
Low Power Shutdown No
Oper. Temp. (°C) -40 to +125
Package/Pins SSOP HYBRID/20
BudgetaryPrice (See Notes) 4.74

MAX14002AAP+ Data & Signal Conversion by Analog Devices

ADC SINGLE SAR 10BIT 10KSPS SSOP-20

Semiconductors - ICs
> Data & Signal Conversion
> Analog-to-Digital Converters - ADC
Status: Unknown
Series: Single 10-Bit SAR ADCs
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock
The MAX14001/MAX14002 are isolated, single-channel analog-to-digital converters (ADCs) with programmable voltage comparators and inrush current control optimized for configurable binary input applications. 3.75kVRMS of integrated isolation is provided between the binary input side (field-side) and the comparator output/SPI-side (logic-side) of the MAX14001/MAX14002. An integrated, isolated, DC-DC converter powers all field-side circuitry, and this allows running field-side diagnostics even when no input signal is present. The 20-pin SSOP package provides 5.5mm of creepage and clearance with group II CTI rating. These devices continually digitize the input voltage on the field-side of an isolation barrier and transmit the data across the isolation barrier to the logic-side of the device where the magnitude of the input voltage is compared to programmable thresholds. The binary comparator output pin is high when the input voltage is above the upper threshold and low when it is below the lower threshold. Response time of the comparator to an input change is less than 150µs with filtering disabled. With filtering enabled, the comparator uses the moving average of the last 2, 4, or 8 ADC readings. Both filtered and unfiltered ADC readings are available through the 5MHz SPI port, which is also used to set comparator thresholds and other device configuration. The MAX14001/MAX14002 control the current of a binary input through an external, high-voltage FET. This current cleans relay contacts and attenuates input noise.An inrush comparatormonitoringtheADCreadingstriggerstheinrush current, or wetting pulse. The inrush trigger threshold, cur- rent magnitude, and current duration are all programmable in the MAX14001 but are fixed in the MAX14002. When the high-voltage FET is not providing inrush current, it switches to bias mode. Bias mode places a small current load on the binary input to attenuate capacitively coupled noise. The level of bias current is programmable between 50µA and 3.75mA in both the MAX14001 and MAX14002. This allows optimization of the tradeoff between noise attenuation and power dissipation.

Specifications

Resolution (Bits) 10bit
Sampling Rate 10kSPS
Input Channel Type Differential
Data Interface SPI
Supply Voltage Type Single
Supply Voltage Min 3V
Supply Voltage Max 3.6V
ADC / DAC Case Style SSOP
No. of Pins 20Pins
Operating Temperature Min -40°C
Operating Temperature Max 125°C
Product Range Single 10-Bit SAR ADCs
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

Industrial isolated "universal | Analog Devices
Adc, Single, Sar, 10Bit, 10Ksps, Ssop-20 | Newark Electronics
ADC, SINGLE, SAR, 10BIT, 10KSPS, SSOP-20 | element14

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