MCP2030A-I/P【PDF 1/66 页】IC KEYLESS ENTRY AFE 3CH 14PDIP

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MCP2030

Three-Channel Analog Front-End Device

Device Features:

Description:

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 μ A (with 3 channels

enabled), typical

Low operating current: 13 μ 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)

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

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

(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

- Parking lot entry transponder

- Hands-free apartment door access

V SS

LCCOM

- Asset control and management

SCLK/ALERT

12 NC

? 2005 Microchip Technology Inc.

RSSI

LFDATA/

CCLK/SDIO

V DD

NC 5

LCX

LCY

LCZ

V DD

DS21981A-page 1

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