MCP2030

• 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 A (with 3 channels enabled), typical
• Low operating current: 13 A (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)

Absolute Maximum Ratings(†)
Ambient temperature under bias...............-40°C to +125°C
Storage temperature ............................... -65°C to +150°C
Voltage on V_DD with respect to V_SS ............... -0.3V to +6.5V
Voltage on all other pins with
respect to V_SS ..................................... -0.3V to (V_DD + 0.3V)
Maximum current out of V_SS pin ................................300 mA
Maximum current into V_DD pin ...................................250 mA
Maximum LC Input Voltage
(LCX, LCY, LCZ) loaded, with device........................10.0 V_PP
Maximum LC Input Voltage
(LCX, LCY, LCZ) unloaded, without device.............700.0 V_PP
Maximum Input Current (rms) into device
per LC Channel............................................................10 mA
Human Body ESD rating....................................2000 (min.) V
Machine Model ESD rating ..................................200 (min.) V

† Notice: Stresses above those listed under "Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operation listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.

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 MCP2030 has three low-frequency input channels. Each input channel can be individually enabled or disabled. The device can detect an input signal with a mplitude as low as ~1 mV_PP and can demodulate an amplitude-modulated input signal with as low as 8% modulation depth. The MCP2030 can also transmit data by clamping and unclamping the input LC antenna voltage.

The MCP2030 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 MCP2030 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 MCP2030 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.

This MCP2030 is available in 14-pin PDIP, SOIC, and TSSOP packages. This device is also used as the AFE in the PIC16F639.