MCP2030A Three-Channel Analog Front-End Device with 1 mV Input Detection Sensitivity PP Device Features Description Three input pins for analog input signals The MCP2030A is a stand-alone Analog Front-End (AFE) device for Low-Frequency (LF) sensing and bidi- High input detection sensitivity (1 mV , typical) PP rectional communication applications. The device has High modulation depth sensitivity (as low as 8%) eight internal configuration registers. These registers, Three output selections: with the exception of the read-only Status register, are - Demodulated data readable and programmable by an external device. - Carrier clock The device has three low-frequency input channels. - RSSI Each input channel can be individually enabled or dis- Input carrier frequency: 125 kHz, typical abled. The device can detect an input signal with ampli- tude as low as ~1mV and can demodulate an Input data rate: 10 Kbps, maximum PP amplitude-modulated input signal with as low as 8% Eight internal configuration registers modulation depth. The device can also transmit data by Bidirectional transponder communication clamping and unclamping the input LC antenna (LF talk back) voltage. Programmable antenna tuning capacitance The device can output demodulated data, carrier clock, (up to 63 pF, 1 pF/step) or RSSI current, depending on the register setting. The Programmable output-enable filter demodulated data and carrier clock outputs are avail- Low standby current: 6.5 A (with three channels able on the LFDATA pin, while the RSSI output is avail- enabled), typical able on the RSSI pin. The RSSI current output is Low operating current: 19 A (with three channels linearly proportional to the input signal strength. enabled), typical The device has programmable internal tuning capaci- Serial Peripheral Interface (SPI) with external tors for each input channel. The user can program devices these capacitors up to 63 pF, 1 pF per step. These Supports Battery Backup mode and batteryless internal tuning capacitors can be used effectively for operation with external circuits fine-tuning of the external LC resonant circuit. Industrial and Extended Temperature Range: The device is optimized for very low current consump- -40C to +85C (industrial) tion and has various battery-saving low-power modes (Sleep, Standby, Active). The device can also be oper- Typical Applications ated in Battery Backup and Batteryless modes using a few external components. Automotive industry applications: This device is available in 14-pin PDIP, SOIC, and - Passive Keyless Entry (PKE) transponder TSSOP packages. - Remote door locks and gate openers - Engine immobilizer Package Types - LF initiator sensor for tire pressure monitoring MCP2030A systems PDIP, SOIC, TSSOP Security Industry applications: V V 1 14 - Long range access control transponder SS SS CS 2 13 LCCOM - Parking lot entry transponder SCLK/ALERT - Hands-free apartment door access 3 12 NC - Asset control and management RSSI LCX 4 11 NC LCY 5 10 LFDATA/ LCZ 6 9 CCLK/SDIO V 7 8 V DD DD 2011 Microchip Technology Inc. DS22235B-page 1MCP2030A NOTES: DS22235B-page 2 2011 Microchip Technology Inc.