MICROCHIP MCP2030A-I/SL

The MCP2030 is a stand-alone Analog Front-End (AFE) device for Low-Frequency (LF) sensing and bidirectional communication applications. The device has eight internal Configuration registers which are readable and programmable, except the read-only STATUS register, by an external device. The device has three low-frequency input channels. Each input channel can be individually enabled or disabled. The device can detect an input signal with amplitude as low as ~10 mVPP and can demodulate an amplitude-modulated input signal with as low as 8% modulation depth. The device can also transmit data by clamping and unclamping the input LC antenna voltage. The device can output demodulated data, carrier clock or RSSI current depending on the register setting. The demodulated data and carrier clock outputs are available on the LFDATA pin, while the RSSI output is available on the RSSI pin. The RSSI current output is linearly proportional to the input signal strength. The device has programmable internal tuning capacitors for each input channel. The user can program these capacitors up to 63 pF, 1 pF per step. These internal tuning capacitors can be used effectively for fine-tuning of the external LC resonant circuit. The device is optimized for very low current consumption and has various battery-saving low-power modes (Sleep, Standby, Active). The device can also be operated in Battery Back-up and Batteryless modes using a few external components.

• Three input pins for analog input signals
• High input detection sensitivity (3 mVPP typical)
• High modulation depth sensitivity (as low as 8%)
• Three output selections: Demodulated data, Carrier clock, RSSI
• Input carrier frequency: 125 kHz, typical
• Input data rate: 10 Kbps, maximum
• 8 internal Configuration registers
• Bidirectional transponder communication (LF talk back)
• Programmable antenna tuning capacitance (up to 63 pF, 1 pF/step)
• Programmable output enable filter
• Low standby current: 4 μA (with 3 channels enabled), typical
• Low operating current: 13 μA (with 3 channels enabled), typical
• Serial Peripheral Interface (SPI) with external devices
• Supports Battery Back-Up mode and batteryless operation with external circuits
• Industrial and Extended Temperature Range: -40°C to +85°C (industrial)

• Automotive industry applications:
  • Passive Keyless Entry (PKE) transponder
  • Remote door locks and gate openers
  • Engine immobilizer
  • LF initiator sensor for tire pressure monitoring systems
• Security Industry applications:
  • Long range access control transponder
  • Parking lot entry transponder
  • Hands-free apartment door access
  • Asset control and management