MCP2030 Datasheet, PDF (1/66 Pages) Microchip Technology – Three-Channel Analog Front-End Device

MCP2030
Three-Channel Analog Front-End Device
Device Features:
• Three input pins for analog input signals
• High input detection sensitivity (3 mV_PP, 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)
Typical Applications:
• 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
Description:
The MCP2030 is a stand-alone Analog Front-End
(AFE) device for Low-Frequency (LF) sensing and bidi-
rectional 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 dis-
abled. The device can detect an input signal with ampli-
tude as low as ~1 mV_PP 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 avail-
able on the LFDATA pin, while the RSSI output is avail-
able on the RSSI pin. The RSSI current output is
linearly proportional to the input signal strength.
The device has programmable internal tuning capaci-
tors 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 consump-
tion and has various battery-saving low-power modes
(Sleep, Standby, Active). The device can also be oper-
ated in Battery Back-up and Batteryless modes using a
few external components.
This device is available in 14-pin PDIP, SOIC, and
TSSOP packages. This device is also used as the AFE
in the PIC16F639.
Package Types:
MCP2030
PDIP, SOIC, TSSOP
V_SS
1
CS ₂
SCLK/ALERT ₃
RSSI ₄
NC 5
LFDATA/
CCLK/SDIO
6
V_DD
7
14
V_SS
13 LCCOM
12 NC
11 LCX
10 LCY
9 LCZ
8
V_DD
© 2005 Microchip Technology Inc.
DS21981A-page 1