AFE General Purpose 1ADC 3V 14-Pin TSSOP T/R

The MCP2035 is a single-channel, stand-alone Analog Front-End (AFE) device for low-frequency (LF) signal detection and low-power short range transponder applications, such as BodyCom communications.The device can detect an input signal with amplitude as low as ~1 mVPP, and can demodulate an amplitude modulated input signal with as low as 8% modulation depth. The device can also transmit data (LF talk-back) by clamping and unclamping the input LC antenna voltage.The device can output demodulated data, carrier clock or RSSI current, depending on the output-type selection configuration register bit settings. 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 the input channel. The user can program the input tuning capacitors up to 63 pF, 1 pF per step. The internal tuning capacitors can be used effectively for fine-tuning of the external LC resonant circuit.The device has eight volatile internal configuration registers for dynamic configurations of the device operation on-the-fly. All registers are readable and programmable using the serial SPI commands, except the read-only STATUS register.The device is optimized for very low current consumption and has various battery-saving low power modes (Sleep, Standby, Active). This device is available in a 14-pin TSSOP package.

• Single Analog Input Pin for Signal Detection
• High Input Detection Sensitivity (3 mVPP, typical)
• High Modulation Depth Sensitivity (as low as 8%)
• Three Output Type Selections:
  • Demodulated Data
  • Carrier Clock
  • Received Signal Strength Indicator (RSSI)
• Input Carrier Frequency: 125 kHz, typical
• Input Data Rate: 10 Kbps, maximum
• 8 Internal Configuration Registers
• Bidirectional Transponder Communication via the same input pin (LF talk-back)
• Programmable Antenna Tuning Capacitance (up to 63 pF, 1 pF/step)
• Programmable Output Enable Filter
• Low Standby Current: 2 µA, typical
• Low Operating Current: 10 µA, typical
• Serial Peripheral Interface (SPI) with external devices
• Industrial and Extended Temperature Range: -40°C to +85°C (Industrial)
• Tape and Reel Packaging