MAX14890EATJ+

MAX14890EATJ+ is an incremental encoder interface for RS-422, HTL, and TTL with digital inputs. The MAX14890E incremental encoder receiver contains four differential receivers and two single-ended receivers. The auxiliary IEC 61131-2 Type-1/Type-3 digital inputs are designed for operation with switches or proximity sensors and can be individually configured for TTL operation. All receiver input signals are fault-protected to voltage shorts in the ±40V range. Per channel fault detection provides warning of irregular conditions such as small differential signals, shorts, opens, overvoltages, and undervoltages. The MAX14890E features a pin-selectable SPI or parallel logic interface. SPI control provides detailed diagnostics and individual configurations for receivers. Applications include encoder interfaces, motor controllers, pulse counters, and servo control commutation.

• High flexibility supports all encoder types, selectable RS-422/HTL/TTL/DI receivers
• RS-422 maximum data rate is 35Mbps at VCC=5V±10%, VL=1.62V to VCC, TA=-40°C to +125°C
• TTL maximum switching rate is 5MHz at TTL mode, CL=15pF, 0V ≤ VIN ≤ +5V
• Single-ended (SE-HTL) maximum switching rate is 400KHz at SE-HTL mode, HITH is high or low
• SPI or pin-controlled operation, 1.62V to 5.5V logic interface
• SPI interface allows per-receiver configuration
• Integrated fault detection reduces down-time
• Open-wire and short-circuit detection, overvoltage and undervoltage fault detection
• 32 TQFN EPpackage
• Temperature range from -40°C to +125°C

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