MLX71121 Datasheet, PDF (1/28 Pages) Melexis Microelectronic Systems – 300 to 930MHz FSK/FM/ASK Receiver

MLX71121
300 to 930MHz
FSK/FM/ASK Receiver
Features
ˆ Dual RF input for antenna space and frequency diversity, LNA cascading or differential feeding
ˆ Fully integrated PLL-based synthesizer
ˆ 2^nd mixer with image rejection
ˆ Reception of ASK or FSK modulated signals
ˆ Wide operating voltage and temperature ranges
ˆ Very low standby current consumption
ˆ Low operating current consumption
ˆ Internal IF filter
ˆ Internal FSK demodulator
ˆ Average or peak detection data slicer mode
ˆ RSSI output with high dynamic range for RF level indication
ˆ Output noise cancellation filter
ˆ MCU clock output
ˆ High over-all frequency accuracy
ˆ 32-pin Quad Flat No-Lead Package (QFN)
Ordering Information
Part Number
Temperature Code
MLX71121
K (-40 °C to 125 °C)
Package Code
LQ (32 L QFN 5x5 Quad)
Delivery Form
73 pc/tube
5000 pc/T&R
Application Examples
ˆ General digital and analog RF receivers
at 300 to 930MHz
ˆ Tire pressure monitoring systems (TPMS)
ˆ Remote keyless entry (RKE)
ˆ Low power telemetry systems
ˆ Alarm and security systems
ˆ Active RFID tags
ˆ Remote controls
ˆ Garage door openers
ˆ Home and building automation
Pin Description
top
bottom
LNAI1
VEE
LNAO1
MIXP
MIXN
LNAO2
VEE
LNAI2
MLX71121
RSSI
CINT
VCC
PDN
PDP
SLC
DFO
DF1
General Description
The MLX71121 is a multi-band, single-channel/dual-channel RF receiver based on a double-conversion
super-heterodyne architecture. It can receive FSK and ASK modulated signals. The IC is designed for gen-
eral purpose applications for example in the European bands at 433MHz and 868MHz or for similar applica-
tions in North America or Asia, e.g. at 315MHz or 915MHz.
The receiver’s extended temperature and supply voltage ranges make the device a perfect fit for automotive
or similar applications where harsh environmental conditions are expected.
39010 71121
Rev. 007
Page 1 of 28
Data Sheet
Feb/08