Analog Devices Inc. ADE1202 Isolated Digital Input

Analog Devices ADE1202 Isolated Digital Input is a dual-channel, configurable, isolated digital input monitoring solution for energy transmission and distribution applications. The ADE1202 is configured through the serial port interface (SPI) to perform an isolated measurement of the digital input that is also called binary input or contact input. The ADE1202 digital output signal on the DOUT1 pin reflects the state of the input signal after user-configurable signal conditioning. The SPI protocol supports addressing to allow up to eight devices sharing one 4-wire SPI port.

The ADE1202 application circuit accepts a wide range of input voltages from ±10V_DC to ±300V_DC or 8V_rms to 240V_rms. The programmable wetting current and robust application circuit enable the device to meet stringent, system-level electromagnetic capability (EMC) requirements. The ADE1202 includes an isoPower® integrated, isolated dc-to-dc converter that eliminates the need for an external isolated power supply. The iCoupler® chip-scale transformer technology is used to isolate the logic signals between the high voltage, isolated side, and the low voltage, nonisolated side of the digital input monitor. This technology creates a small form factor design that includes data and power isolation.

An integrated successive approximation register (SAR) analog-to-digital converter (ADC) and a programmable gain amplifier (PGA) from 1× to 10× measure the analog inputs. The ADC waveforms are available through the SPI port to allow system-level diagnostics.

Features

Dual-channel, configurable, isolated digital input
Programmable trip threshold
On-chip debounce filter
On-chip data and power Isolation
Application circuit monitors wide voltage range
- 10V_DC to 300V_DC
- 8V_rms to 240V_rms AC (with 10ms + pickup)
- Negative dc protected
Programmable wetting current
- Pulse up to 50mA
- Constant current up to 6.3mA
Safety and regulatory approvals
- UL recognition
  - 3750V_rms for 1 minute per UL 1577
- CSA Component Acceptance Notice #5A (pending)
  - CSA 61010-1: 300V_rms
- VDE certificate of conformity (pending)
  - DIN V VDE V 0884-11 (VDE V 0884-11):2017-1
  - V_IORM = 565V_peak

EMC robust solution supports relay protection system-level requirements
ADC samples available for system diagnostics
Internal SAR ADC with PGA
Single 3.3V Supply
- Integrated isoPower, isolated dc-to-dc converter
Interfaces
- SPI
- DOUTx output reflects state of digital input
- IRQ interrupt pin
Operating temperature: −40°C to +125°C
20-lead, LGA package with 6.8mm creepage