MICRF219

300MHz to 450MHz ASK Receiver with

RSSI, Auto-Poll, Bit-Check and Squelch

QwikRadio is a registered trademark of Micrel, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

January 20

9-011509

(408) 944-0800

09

M999

General Description

The MICRF219 is a 300MHz to 450M

heterodyne, image-reject, RF receiver with

Gain Control, OOK/ASK demodulator and an

output. The device integrates Auto-Poll,

Hz super-

• –110

Automatic

• Supports

alog RSSI

• 25dB Image-Re

Valid Bit-Check,

ject Mixer

Squelch and Desense features. It only requir

and a minimum number of external comp

implement. It is ideal for low-cost, low-po

TPMS, and remote actuation applications.

The MICRF219 achieves -110dBm sensitivit

rate of 1kbps (Manchester encoded). Four d

filter bandwidths are selectable in binary

1625Hz to 13kHz at 433MHz, allowing the

support data rates to 10kbps. The device ope

a supply voltage of 3.0V to 3.6V, and consum

of supply current at 315MHz and 6.0mA at 4

A shutdown mode reduces supply current to

Auto-Polling feature allows the MICRF219 to

poll for user defined periods, thus furthe

es a crystal

• No IF Filter Required

onents to

• 60dB Analog RSSI

wer, RKE,

• 3.0V to 3.6V Supply Voltage R

y at a data

at

emodulator

• 6.0mA supply current at 434M

steps from

• 0.5uA supply current

device to

• Optional Auto-Po

rates from

• Optio

es 4.0mA

nal Valid Bit-Che

• Optional Programm

3

0

sle

r

ode, fully awakes the receiver

the microcontroller once a valid

number of bits are detected. During normal operation an

optional Squelch feature disables the data output until

valid bits are detected. An optional Desense feature

reduces gain by 6dB to 42dB, distancing the receiver

from distantly placed, undesired transmitters.

dBm sensitivity at 1kbps with BER 10E-02

data rates up to 10kbps at 433.92MHz

Output

ange

315MHz (continuous receive)

Hz (continuous receive)

in Shutdown Mode

lling (sleep mode, current < 0.1mA)

ck in Auto-Poll Mode

able 6dB to 42dB Desense

Data Output Squelch until valid bits detected

• 1

kag

m x 6.0mm)

-4

Te

ange

• Evaluation board QR219BPF Available

Ordering Information

Part Number

Temperature Range

Package

3.92MHz.

.5uA. The

• Optional

ep and

reducing

•

supply current. The Valid Bit-Check feature, when

• 2kV HBM ESD Rating

enabled in Auto-Poll m

and sends bits to

Features

• 4.0mA supply current

6-pin QSOP Pac

e (4.9m

0˚C to +105˚C

mperature R

MICRF219AYQS

–40°C to +105°C

16-Pin QSOP

_______________________________________________________________________________________________

Typical Application