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  Microchip Technology Semiconductor Electronic Components Datasheet  


MCP2035

Analog Front-End Device



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MCP2035 pdf
MCP2035
Analog Front-End Device for BodyCom Applications
Device Features:
• 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)
Typical Applications:
• BodyCom Applications
• Security Industry Applications
• Automotive Industry Applications
Description:
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.
Package Type:
MCP2035
TSSOP
VSS
CS
SCLK/ALERT
RSSI
NC
LFDATA/
CCLK/SDIO
VDD
1
2
3
4
5
6
7
14 VSS
13 LCCOM
12 NC
11 LCX
10 NC
9 NC
8 VDD
2012 Microchip Technology Inc.
DS22304A-page 1



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MCP2035 pdf
MCP2035
NOTES:
DS22304A-page 2
2012 Microchip Technology Inc.



Part Number MCP2035
Description Analog Front-End Device
Maker Microchip - Microchip
Total Page 30 Pages
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