R901G and R902DRM

Highly integrated EPC Gen 2 reader ICs

The R901G and R902DRM are EPC Gen2 RFID reader chips enabling battery-powered, small form-factor handheld and embedded UHF reader systems. The chips fully support ISO 18000-6C, and ISO 18000-6A/B as well as proprietary protocols are supported through the direct mode.
Adding a simple low-cost 8-bit microcontroller completes a portable UHF reader system. In embedded systems, the R901G / R902DRM can share a common CPU with the rest of the system. Hence reducing BOM and enabling cost-efficient solutions with minimum form factor. The R902DRM also includes dense reader mode function, which prevents reading conflicts in a multi-reader environment.
Complete development kits including R901G reader boards are available. The kits come with demo application and GUI software with source codes.

Description:

The R901G and R902DRM are highly integrated analog front-end and data framing reader ICs for 900MHz RFID reader systems. Built-in programming options make the devices suitable for a wide range of applications in UHF RFID systems, especially portable and embedded systems, due to the low power consumption and simple BOM.
The reader configuration is achieved by selecting the desired settings in control registers. Direct access to all control registers also allows fine-tuning of different reader parameters, if needed.
The R901G and R902DRM comply with EPC Gen 2 protocol (ISO 18000-6C).


Key Features:

• Supply voltage range 5.0 to 5.5V
• Protocol: ISO 18000-6C / EPC Gen2
• Supports ISO18000-6A/B and proprietary protocols in direct mode
• Antenna driver using OOK or PR-ASK modulation
• Dual receiver input with automatic I/Q selection provides both AM and PM demodulation, avoids communication holes
• Reception automatic gain control
• 3.3V voltage regulator providing up to 20 mA for external MCU
• Dense reader mode function (only R902DRM)
• Significant increase of PSRR through on-chip RF output supply regulator
• Power-down, standby and active mode
• Temperature range: -40°C to 110°C
• Supports frequency hopping
• Selectable clock output for MCU

Applications:

• UHF RFID embedded reader systems
• Handheld UHF RFID readers

Package:

• 64-LD QFN (9x9 mm; RoHS)

Application Diagram: