300MHz to 450MHz ASK Receiver w

RSSI, Auto-Poll, Bit-Che

MICRF219

ith

ck and Squelch

NOT RECOMMENDED

REFER TO MICRF219A FOR NEW DESIGNS

QwikRadio is a registered trademark of Micrel, Inc.

June 2011

M9999-060811

(408) 944-0800

3

0

s

r

l mode, 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 1% BER

data rates up to 10kbps at 433.92MHz

Output

ange

315MHz (continuous receive)

Hz (continuous receive)

in Shutdown Mode

ling (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)

−40

C Te

e

• Evaluation board QR219BPF Available

Ordering Information

Part Number

Temperature Range

Package

General Description

The MICRF219 is a 300MHz to 450MH

heterodyne, image-reject, RF receiver with

Gain Control, OOK/ASK demodulator and a

output. The device integrates Auto-Poll,

z super-

• –110

Automatic

• Supports

nalog RSSI

• 25dB Image-Re

Valid Bit-Check,

ject Mixer

Squelch, and Desense features. It only

crystal and a minimum number of external c

to 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

requires a

• No IF Filter Required

omponents

• 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-Pol

rates from

• Optio

es 4.0mA

nal Valid Bit-Che

• Optional Programm

3.92MHz.

.5

• Optional

uA. The

leep and

reducing

•

supply current. The Valid Bit-Check feature, when

• 2kV HBM ESD Rating

enabled in Auto-Pol

and sends bits to

Features

• 4.0mA supply current

6-pin QSOP Pac

e (4.9m

°C to +105°

mperature Rang

MICRF219AYQS

−40°C to +105°C

16-Pin QSOP

_______________________________________________________________________________________________

Typical Application