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MICRF008

Features: • Complete UHF receiver on a monolithic chip• 300MHz to 440MHz frequency range• Up to 4.8kbps data rate.• Automatic tuning, no manual adjustment• Very low RF antenna reradiation• CMOS logic interface for standard ICs• Low external part count̶...

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SeekIC No. : 004421147 Detail

MICRF008: Features: • Complete UHF receiver on a monolithic chip• 300MHz to 440MHz frequency range• Up to 4.8kbps data rate.• Automatic tuning, no manual adjustment• Very low RF ...

MICRF008 Data Sheet

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Part Number:
MICRF008
Supply Ability:
5000

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  • 1~5000
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  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

• Complete UHF receiver on a monolithic chip
• 300MHz to 440MHz frequency range
• Up to 4.8kbps data rate.
• Automatic tuning, no manual adjustment
• Very low RF antenna reradiation
• CMOS logic interface for standard ICs
• Low external part count
• Replaces superregenerative receivers design
• Manufacturability and same performance over the years
• Very small PCB area required




Application

• Garage door and gate openers
• Security systems
• Remote appliances control
• Toys
• Fan and light control




Pinout

Connection Diagram
Pin Number
Pin Name
 Pin Function
1
SEL0
 Bandwidth Selection Bit 0 (Input): Sets the desired demodulator filter
bandwidth. See Table 1. Internally pulled-up to VDD.
2
ANT
 Antenna (Input): High-impedance, internally AC-coupled receiver input.
Connect this pin to the matching network. See "Applications Information" for
optional band-pass filter information.
3
VDD
 Positive Supply Input: Connect a low ESL, low ESR decoupling capacitor
from this pin to VSS, as short as possible.
4
CTH
 [Data Slicing] Threshold Capacitor (External Component): Capacitor
extracts the DC average value from the demodulated waveform which
becomes the reference for the internal data slicing comparator. See "Applications
Information" for selection.
5
DO
 Digital Output (Output): CMOS-level compatible data output signal.
6
VSS
 Negative Supply Input: Connect this pin to the RF ground.
7
CAGC
 AGC Capacitor (External Component): Integrating capacitor for on-chip
AGC (automatic gain control). The decay/attack time-constant () ratio is
nominally 10:1. See "Applications Information" for capacitor selection.
8
REFOSC
 Reference Oscillator (External Component or Input): Timing reference for
on-chip tuning and alignment. Connect either a ceramic resonator or a
crystal between this pin and VSS, or drive the input with an AC-coupled
0.5VPP input clock.





Specifications

Supply Voltage (VDDRF, VDDBB) .......................................+7V
Reference Oscillator Input Voltage (VREFOSC) ............. VDDBB
Input/Output Voltage (VI/O) ................. .VSS0.3 to VDD+0.3
Junction Temperature (TJ) ........................................ +150°C
Storage Temperature Range (TS) ............65°C to +150°C
Lead Temperature (soldering, 10 sec.) ................... ...+260°C




Description

The MICRF008 QwikRadio™ UHF receiver is a single-chip OOK (on-off keyed) receiver IC designed for remote wireless applications. This device is a true single-chip, "antenna-in, data-out" device, and it is easy to implement. MICRF008 receiver requires very few peripheral passive components. All tunings, RF and IF, are accomplished within the IC. Ease of use and minimal parts count translate to cost savings and shorter time to market. MICRF008 receiver offers a robust and low-cost solution for high volume wireless applications.

The MICRF008 sweeps the internal local oscillator at rates greater than the baseband data rate. This effectively broadens the RF bandwidth of the receiver to a value equivalent to conventional superregenerative receivers. This allows the MICRF008 to operate with less expensive LC transmitters without additional components or tuning, even though the receiver topology is still superheterodyne. In this mode the reference crystal can be replaced with a less expensive ±0.5% ceramic resonator.

Since all post-detection (demodulator) data filtering is provided on the MICRF008, no external IF filters are required. One of the two internal filter bandwidths must be externally selected based on data rate and code modulation format.






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