Electronic Components Datasheet Search |
|
A3845SLW Datasheet(PDF) 1 Page - Allegro MicroSystems |
|
A3845SLW Datasheet(HTML) 1 Page - Allegro MicroSystems |
1 / 8 page This noise blanker integrated circuit contains all of the necessary circuitry for adding an extremely efficient (patented) noise-blanking technique to any type of AM tuner or receiver with RF input frequen- cies (or a first IF) to 30 MHz. The A3845ELW and A3845SLW feature dual audio channels and are intended for AM-stereo or indepen- dent sideband applications. A high input impedance, high-gain, broadband RF amplifier permits these devices to be directly connected to the RF stage of a tuner. Internal AGC circuitry ensures that the noise detection threshold remains constant with changes in input signal level. The RF gate response time is sufficiently fast to blank the noise pulse at the output of the mixer before the IF filter. Short blanking times effectively suppress most of the interfering noise. Residual audio noise is re- moved by an audio sample-and-hold gate. The RF blanking time, audio gate delay time, and audio gate blanking time can all be indepen- dently adjusted to suit the particular application. These AM noise blankers are packaged in plastic SOICs and are rated for operation over the a standard temperature range of -20 °C to +85 °C (suffix ‘SLW’) or an extended temperature range to -40°C (suffix ‘ELW’). AM NOISE BLANKER ABSOLUTE MAXIMUM RATINGS at TA = +25 °C Supply Voltage, VCC . . . . . . . . . . . . . . 12 V Package Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . 1.78 W Operating Temperature Range, TA Suffix ‘ELW’ . . . . . . . . -40 °C to +85°C Suffix ‘SLW’ . . . . . . . . -20 °C to +85°C Storage Temperature Range, TS . . . . . . . . . . . . . . . . -55 °C to +125°C FEATURES I RF Blanking to 30 MHz I Single-Channel or Stereo Audio Blanking I Adjustable RF and Audio Blanking Time I Adjustable Audio Blanking Delay I Sample-and-Hold MOS Audio Gates I Internal Voltage Regulation I Minimum External Components APPLICATIONS I AM and AM-Stereo Automotive Radios I CB Transmitter/Receivers I Short-Wave Receivers I Mobile Communications Equipment 3845 Always order by complete part number: Part Number Function A3845ELW Stereo Noise Blanker, Extended Temp. Range A3845SLW Stereo Noise Blanker, Standard Temp. Range GROUND 13 14 15 16 17 19 12 18 20 11 1 2 3 8 9 4 5 6 7 10 RF AGC SUPPLY CC V AUDIO DELAY RF BIAS AUDIO BLANK TIME (R) AUDIO BLANK TIME (C) RF BLANK TIME AUDIO OUT1 NO CONNECT NO CONNECT NC NC Dwg. PS-003-1A RF GATE LOW RF IN RF BYPASS AUDIO IN1 AUDIO OUT2 AUDIO IN 2 NO CONNECT NC RF GATE HIGH DET NOISE DIFFERENTIATOR |
Similar Part No. - A3845SLW |
|
Similar Description - A3845SLW |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |