ATR4258-ILSH Atmel, ATR4258-ILSH Datasheet
ATR4258-ILSH
Specifications of ATR4258-ILSH
Related parts for ATR4258-ILSH
ATR4258-ILSH Summary of contents
Page 1
... Electrostatic sensitive device. Observe precautions for handling. 1. Description The ATR4258 is a highly integrated AM/FM front-end circuit manufactured using Atmel’s advanced BICMOS technology. It represents a complete, automatically adjustable AM/FM front end, containing a double-conversion system for FM and an up/down-conversion receiver for AM with IF1 = 10.7 MHz and IF2 = 450 kHz. The front end is suitable for digital or analog AF-signal processing ...
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... AM 3 MX1AMB 7 AMAGC 6 AMVREG AGC AMPLPF 8 1 MX1FMA FM MX1FMB 2 GNDMX 4 Divider OSCOUT Divider GNDOSC 15 OSCE OSC 14 Bandgap OSCB V57 VS GND ATR4258 2 IF1AMI V3 MX2OB IF1REF IF1OUT MX2IN MX2OA blanker AGC Offset Adj. Chan. Bus DATA METER MX2LO ADJAC FMAGC CLK IF2IN V3P ...
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... V57 12 33 OSCB 13 32 OSCE 14 31 GNDOSC 15 30 OSCOUT CLK 18 27 DATA 19 26 IF2OUT 20 25 INT 21 24 MX2LO 22 23 ATR4258 MX1OB MX1OA VS MX1AMA MULTIP IF1REF IF1FMI FILADJ IFAGCL IFAGCH SMUTE IF1AMI OPLPF DEV IF1OUT V3 IF2IN V3P MX2IN GND MX2OA MX2OB 3 ...
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... IF1FMI 1 39 IF1REF 1 40 MULTIP Multipath detection output 41 MX1AMA Supply voltage 43 MX1OA 1 44 MX1OB 1 ATR4258 4 st mixer FM input A st mixer FM input B st mixer AM input B st mixer, preamplifier AGC nd IF amplifier output nd mixer nd mixer output B nd mixer output A nd mixer input nd IF amplifier input ...
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... Functional Description The ATR4258 implements an AM up/down-conversion reception path from the RF input signal to the AM-demodulated audio frequency output signal, and for FM/WB reception a double-conver- sion reception path from the RF input signal to the FM-demodulated multiplex signal (MPX). A VCO and an LO prescaler for AM are integrated to generate the LO frequency for the 1 Automatic gain control (AGC) circuits are implemented to control the preamplifier and IF stages in the AM and FM reception path ...
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... FM). The divider factor of the prescaler buffer provides the signal of the buffered output (at pin 16) and the prescaler VCO provides the signal of the 1 Examples of VCO prescaler settings are described in section 29. The divider factor of the VCO and buffer prescaler can be selected according page 7. ATR4258 6 Operating Mode Bit 93 Standby 0 ...
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... The in-band AGC threshold refers to the FM mixer input (pin 1, pin 2) FM-AGC Threshold FM-AGC Threshold 100 dBµV 97 dBµV 94 dBµV 91 dBµV FM RF-AGC Bit 92 AGC Bit 12 Bit Figure Bit Pin 42 C111 Pin 5 PIN Diode B92 ATR4258 Bit 4-1) in order to limit Bit ...
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... Therefore prescaler is implemented to generate the necessary LO frequency from the VCO frequency. The divide factor of the AM prescaler can be selected according to Table 4-8. (The AM prescaler is only active in AM mode). Table 4-8. Divider (AM Prescaler) ATR4258 8 AM-AGC Threshold AM-AGC Threshold 91 dBµV 94 dBµV 97 dBµ ...
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... IF amplifier is controlled by the IF-AGC to extend the mixer is used in AM, FM and WB mode. The mixer input has 330 input resistance and nd 2 Mixer Output Resistance in FM Mode Bit 60 Output Resistance (Bit mixer (10.25 MHz) has to be applied at pin 22. This signal is usually ATR4258 Bit 91 Bit ...
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... In FM/WB mode, the output signal of the FM demodulator is applied to pin 35 via a series resis- tor of about This low-pass filtered output signal of the FM demodulator is used for the FM demodulator fine adjustment, for muting and as a reference for the deviation sensor. ATR4258 10 FM Bandwidth Mixer 2 Bit 60 ...
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... IF after the gain-controlled 2 IF amplifier is available at pin 20 (bit mode, Pin 20 Output Setting Pin output Multipath field strength Automatic IF Center Frequency Adjustment Automatic Pin 22 frequency 10.25 MHz adjustment Bit Pin 37 ATR4258 Bit Center FM-Demod frequency FM- Center frequency band filter Bit ...
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... Table 4-16. Table 4-17. ATR4258 Center Frequency IF Center Bit 59 450.00 kHz 0 456.25 kHz 0 462.50 kHz 0 468.75 kHz 0 475.00 kHz 0 481.25 kHz 0 487.50 kHz 0 493.75 kHz 0 450.00 kHz 1 443.75 kHz 1 437.50 kHz 1 431.25 kHz 1 425.00 kHz 1 418.75 kHz 1 412.50 kHz 1 406.25 kHz ...
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... Bandwidth of the Integrated Band Filter 220 195 ... ... 200 160 ... ... 165 120 ... ... 130 80 ... ... Not usable 70 Not usable 60 Not usable FM Demodulator Automatic Fine Tuning FM-Demod Center frequency - + Bit 53 Automatic frequency adjustment ATR4258 Bit 3 Bit 2 Bit ... ... ... ... ... ... ... ... ... ... ... ... ...
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... The field strength signal available at pin 9 is used for soft mute. Therefore, the soft mute thresh- old that referred to the input of the FM mixer depends on the gain from the FM mixer input to the field strength sensor and on the setting of field strength offset (bit 15 to bit 21). Table 4-21. ATR4258 14 Demodulator Gain in Weather Band Mode 14 dB ...
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... The bandwidth of the low-pass filter at the MPX output can be set by means of bit kHz or 180 kHz. Table 4-23. Table 4-24. 4.19 Receiving Condition Analyzer The ATR4258 implements several sensors that provide information about the receiving condition of the selected station. 4838B–AUDR–05/05 Maximum Soft Mute Maximum Value of Soft Mute 30 dB ...
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... The frequency of the IF signal is measured by counting the number of periods of the IF signal during a measurement time which is determined by bit 73 to bit 78. The inverted STOP signal is available at pin 21 according to quency of 10.25 MHz at pin 22 is used as a time reference. ATR4258 ...
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... MPINT = Multipath interrupt, Stop and MPINT signal are active low Deviation Sensor MPX Bit 78 Bit 77 Bit 76 Bit Bit INT (Pin 21) 1 NOT MPINT NOT STOP NOT (STOP AND NOT MPINT PIN ATR4258 Bit 74 Bit Bit 86 Bit Figure 4-5). 17 ...
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... The maximum depth of these drops is represented by the voltage of the peak detector at pin 40 (MULTIP). The level of this voltage represents the degree of disturbance in the received signal. Figure 4-7. ATR4258 18 Adjacent Channel Sensor IF SMeter ...
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... Muting of the MPX signal during multipath disturbances can be activated be set- Multipath Noise Canceller Multipath Noise Canceller Active Not active Sensitivity of the MNC Sensitivity MNC (Threshold) Off Low ... (–33 dB) ... Normal (–14 dB) ... High (–9 dB) Valid mode (bit Multipath Interrupt (MPINT) ATR4258 Table 4-32), the MPX signal Bit Bit 84 Bit 83 Bit ... ... ...
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... AM Noise Blanker The AM Noise Blanker of the ATR4258 can be activated by bit 5. The noise peak is detected in the field strength of the first IF and if the disturbance exceeds the level defined by the bits 85 to 87, the signal is muted at the second IF. Table 4-34. AM Noise Blanker Off On Table 4-35. ...
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... Figure 4-8. Pulse Diagram 8-bit command EN LSB BYTE 1 DATA CLK 24-bit command EN LSB BYTE 1 DATA CLK Figure 4-9. Bus Timing t R ENABLE DATA CLOCK 4838B–AUDR–05/05 MSB MSB LSB BYTE 2 t HDA ATR4258 MSB LSB BYTE 2 MSB HEN ...
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... A8_101 MSB BYTE 1 MP Band-path filter ADDR. INT Band width ATR4258 22 LSB MSB BYTE 2 AM OSC Search Width of window divider/multipath sensitivity B88 B87 B86 B85 B84 B83 B82 B81 LSB MSB BYTE 2 1 IF1 Soft AGC Mixer Tk-FM ampl. mute threshold ...
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... Value 60 Typ. Max. 8.5 10 +85 Min. Typ. Max. V 8.0 8 Stby 260 VCO 3.4 3.7 4.0 250 70 3.8 4.1 4.4 8.3 V – 0.2 S 115 ATR4258 Unit V mW °C °C °C Unit K/W Unit V °C Unit Type MHz mVrms dBµ ...
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... Conversion 6.2 conductance rd 6.3 3 -order intercept point Generator resistance 6.4 Noise figure (DSB) 200 6.5 Input resistance 6.6 Input capacitance Pin 2 AC-grounded *) Type means: A =100% tested 100% correlation tested Characterized on samples Design parameter ATR4258 24 = 8.5V 25°C S amb Pin Symbol 43, 44 ...
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... Max. 12 100 0.039 min TK 0.044 max 270 330 400 5 270 330 400 IFAM 10 1 270 330 400 Mix2 IP3 132 Mix2 100 12 1 270 330 400 80 500 1 2.8 3.0 3.2 ATR4258 Unit Type* Vpp dB dBµ Vpp D Vpp D D mVpp ...
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... MPX Output 14.1 DC output voltage Bit Bit 14.2 Mute gain FM dev. = ±75 kHz, f mod 14.3 Output resistance Small signal *) Type means: A =100% tested 100% correlation tested Characterized on samples Design parameter ATR4258 26 = 8.5V 25°C S amb Pin Symbol 28 28 kHz = 38 kHz ...
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... H t 250 L ATR4258 Unit Type µA D MHz ...
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... Set-up time 20.9 Hold time EN 20.10 Hold time DATA 21 Internally Generated Reference Voltages 21.1 Output voltage 21.2 Output voltage 21.3 Output voltage 21.4 Output voltage *) Type means: A =100% tested 100% correlation tested Characterized on samples Design parameter ATR4258 28 = 8.5V 25°C S amb Pin Symbol ...
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... Prescaler VCO Divider = 1 in this example. Maximum Reception Frequency [MHz] 38.4 20.033 13.85 8.94 5.667 3.329 1.575 0.211 0 ATR4258 [MHz] 51.3 30.633 20.3 14.1 9.967 7.014 4.8 3.078 1.7 29 ...
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... U4256 N- and R-divider Calculation 9.3.1 AM Mode N = --------------------------------------------------------------------------------------------- - VCO-divider f = rec 9.3.2 FM/WB Mode N = ------------------------------------------------- - VCO-divider f = rec ATR4258 30 gives an example for the VCO prescaler divider and AM prescaler divider settings and f = 195.9 MHz ... 237.9 MHz VCO f = +10.7 MHz or 10.7 MHz – VCO Prescaler VCO rec IF Minimum Reception ...
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... Frequency Deviation (kHz) Integrated band-filter BW setting: 120 kHz (bits bit 3 = 1); 1 kHz modulation frequency; 50 µs de-emphasis (THD) Figure 10-9). 1.0 0.9 0.8 0.7 +85°C 0.6 0.5 -40°C MPX 0.4 THD 0.3 -40°C 0.2 +85°C 0 100 ATR4258 31 ...
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... Figure 10-2. Multipath Sensor Note: Figure 10-3. Multipath Sensor Frequency Response Note: ATR4258 Modulation Depth (%) AM modulation frequency 20 kHz; generator level 40 dBµV 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 100 1000 AM Modulation Frequency (Hz) Generator level 40 dBµV +85°C -40° ...
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... Frequency Deviation (Hz) FM modulation frequency: 1 kHz; BW setting 2 demodulator fine tuning (bit 1.0 0.8 0.6 0.4 0.2 0 100 1000 FM Modulation Frequency (Hz) FM frequency deviation: 22.5 kHz +85°C -40°C 50000 70000 90000 nd IF filter = 120 kHz; 10000 10000 ATR4258 33 ...
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... Figure 10-6. FM Input Level Sweep Note: Figure 10-7. Selectivity Note: ATR4258 -10 -20 -30 -40 -50 -60 -70 - Input Level (dBµV) Soft mute threshold bits 68 bit soft mute gain bit gain FM IF amplifier bit -10 -20 -30 -40 -50 -60 -70 -300 -250 -200 -150 -100 -50 Frequency Offset (kHz) ...
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... Figure 10-8. Test Circuit 1.3 k Quarz- oscillator 10.25 MHz 10 k Test Point 4838B–AUDR–05/ ATR4258 1 µ Bus 100 P29 100 nF 100 200 k P29 100 P31 P29 330 100 ATR4258 35 ...
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... Figure 10-9. Application Circuit ATR4258 36 4838B–AUDR–05/05 ...
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... Ordering Information Extended Type Number ATR4258-ILSH ATR4258-ILQH 12. Package Information Package SSO44 Dimensions in mm 0.3 0 4838B–AUDR–05/05 Package Remarks SSO44 SSO44 18.05 17.80 0.25 0.10 16 ATR4258 Tube, lead-free Taped and reeled, lead-free 9.15 8.65 7.50 7.30 2.35 10.50 10.20 technical drawings ...
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... Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN ATMEL’S TERMS AND CONDI- TIONS OF SALE LOCATED ON ATMEL’S WEB SITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT ...