U4255BM AM/FM Receiver IC Description The U4255BM is an integrated AM/FM front end circuit in BICMOS technology. It contains a double conversion system for FM and an up/down conversion circuit for AM (IF1 = 10.7 MHz, IF2 = 450 kHz). A complete automatically aligned high performance AM/FM tuner can be built together with the PLL U4256BM. This ICs are designed for high performance car radio applications. Electrostatic sensitive device. Observe precautions for handling. Features FM-double conversion system AM up/down conversion system Integrated second IF filter with software controlled bandwidth AM preamplifier with AGC and stereo capability Completely integrated FM demodulator 3-wire bus controlled Soft mute and multipath noise cancellation Stop signal generation for AM and FM Receiving condition analyzer Automatic alignment possible Block Diagram IF1AMI V3 IF2IN MX2OB MX1OA IF1FMI IF1REF IF1OUT MX2IN MX2OA V3P MX1OB AMPLPF 43 44 8 7 AMAGC 6 AMVREG 38 39 33 30 29 26 23 24 28 IF2OUT 27 20 AM AGC FM AM dem. MX1AMA MX1AMB 41 32 3 V3 AGC 36 35 GNDMX MX1FMB MX1FMA OSCOUT OPLPF AM IFAGCL IFAGCCH 4 2 FM Automatic adjustment 37 FMADJ AGC 1 16 Multi– path Divider 11 GNDOSC Adj. chan. 15 OSCE 14 OSCB 13 FM dem. Stop Soft mute MPX OSC V3 Bus Bandgap Dev. ana. INT 12 25 42 9 17 18 19 5 GND EN DATA FMAGC METER V57 VS CLK 22 MX2LO 10 ADJAC 21 40 INT MULTIP 34 SMUTE 31 DEV Figure 1. Block diagram Ordering Information Extended Type Number Package U4255BM-AFN SSO44 Tube U4255BM-AFNG3 SSO44 Taped and reeled Rev. A2, 11-Oct-00 Remarks 1 (14) U4255BM Pin Description ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Pin Symbol Function 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 MX1FMA MX1FMB MX1AMB GNDMX FMAGC AMVREG AMAGC AMPLPF METER ADJAC MPX V57 OSCB OSCE GNDOSC OSCOUT EN CLK DATA IF2OUT INT MX2LO MX2OB MX2OA GND MX2IN V3P 28 29 30 31 32 33 34 35 36 37 38 39 IF2IN V3 IF1OUT DEV OPLPF IF1AMI SMUTE IFAGCH IFAGCL FILADJ IF1FMI IF1REF 40 41 42 43 44 MULTIP MX1AMA VS MX1OA MX1OB 1st mixer FM input A 1st mixer FM input B 1st mixer AM input B Ground 1st mixer FM preamplifier AGC AM control voltage AM preamplifier AGC AM AGC LP filter Fieldstrength output Adjacent channel detection output Multiplex signal 5.7 V reference voltage Oscillator basis Oscillator emitter Oscillator ground Oscillator output 3-wire bus enable 3-wire bus clock 3-wire bus data 2nd IF amplifier output Interrupt, stop signal, test out 10.25 MHz input for 2nd mixer 2nd mixer output B 2nd mixer output A Ground 2nd mixer input 3 V reference for AMPIN, AMIFAGC, Control, IF2IN 2nd IF amplifier input 3 V reference for IF1OUT, MX2IN 1st IF amplifier output Deviation detect output Operating point LPF 1st IF AM amplifier input Soft MUTE control input IF AGC LP filter high time IF AGC LP filter low time constant Filter adjust 1st IF FM amplifier input 1st IF & MX1OUT reference, MX1AM A, MX1AM B Multipath detection output 1st mixer AM input A Supply voltage 1st mixer output A 1st mixer output B 2 (14) MX1FMA 1 44 MX1OB MX1FMB 2 43 MX1OA MX1AMB 3 42 VS GNDMX 4 41 MX1AMA FMAGC 5 40 MULTIP AMVREG 6 39 IF1REF AMAGC 7 38 IF1FMI AMPLPF 8 37 FILADJ METER 9 36 IFAGCL ADJAC 10 35 IFAGCH MPX 11 34 SMUTE V57 12 33 IF1AMI OSCB 13 32 OPLPF OSCE 14 31 DEV GNDOSC 15 30 IF1OUT OSCOUT 16 29 V3 EN 17 28 IF2IN CLK 18 27 V3P DATA 19 26 MX2IN IF2OUT 20 25 GND INT 21 24 MX2OA 23 MX2OB MX2LO 22 14856 Figure 2. Pinning Rev. A2, 11-Oct-00 U4255BM Absolute Maximum Ratings All voltages are referred to GND (Pin 25) Parameter Symbol Value Unit ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Supply voltage Pin 42 VS 10 V Power dissipation Ptot 800 mW Junction temperature Tj 150 °C Ambient temperature range Tamb –40 to +85 °C Storage temperature range Tstg –50 to +150 °C Parameter Symbol Value Unit soldered to PCB RthJA 80 K/W Thermal Resistance Junction ambient Operating Range All voltages are referred to GND (Pin 25) Parameter Supply voltage range Pin 42 Ambient temperature Symbol Min. Typ. Max. Unit VS 7.5 8.5 10 V Tamb –40 +85 °C Electrical Characteristics Test conditions (unless otherwise specified): VS = 8.5 V, Tamb = 25°C. For AC parameters: fiRF = 100 MHz, Rg = 50 , fMOD = 0.4 kHz, ∆f = 75 kHz, fIF = 450 kHz, reference point Pin 4 ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ Parameter Test Conditions / Pins Symbol Supply voltage Pin 42 VS Supply current Pin 42 IS Min. Typ. Max. Unit 8.5 10 V 70 mA AM Mixer (10.7 MHz) DC supply current Conversion conductance ioif/virf Maximum IF output Pins 43 and 44 Third order input intercept point Input resistance Rev. A2, 11-Oct-00 Pin 41 18 mA Sm1 4.1 mA/v voIF 8 vpp IP3 133 dBµV 2.5 k 3 (14) U4255BM Electrical Characteristics (continued) Test conditions (unless otherwise specified): VS = 8.5 V, Tamb = 25°C. For AC parameters: fiRF = 100 MHz, Rg = 50 , fMOD = 0.4 kHz, ∆f = 75 kHz, fIF = 450 kHz, reference point Pin 4 Parameter Test Conditions / Pins Symbol Min. Pin 33 Ri 10 RL = 330 Pins 30 to 33 G Typ. Max. Unit ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ AM-1st IF Amplifier (10.7 MHz) Input resistance 1st IF amplifier gain k 16 dB 26 dB 10 mA Sm2 2 mA/v voIF 8 vpp Output impedance Ro Co 1 3 M pF Third order input intercept point IP3 133 dBµV Input resistance Ri 330 Pin 28 Ri 3 k Pins 28 to 20 G 43 dB 37 dB 160 100 90 220 mV mV mV 160 MHz –15 dBc Preamplifier control range Mixer 2 (450 kHz) DC supply current Conversion conductance ioif2/viif1 Maximum IF output 2nd IF Amplifier Pins 23 and 24 (450 kHz) Input resistance IF preamplifier gain Preamplifier control range Oscillator (Pin 15, GND, connected to external oscillator components) Oscillator range Rg (Pin 13) = 220 , Q of Losc = 70, RL1 = 520 Frequency range Harmonics Pin16 Output resistance Pin 16 VLOB VLOE VLObuf 70 fOSC 70 RLO 70 IP3 120 dBV gc 7 mA/v NFdsb 10 dB FM Mixer Third order intercept point Load impedance: RL43, 44 = 200 Conversion transconductance Noise figure Input resistance Pins 1 to 2 Ri 1, 2 1.6 k Input capacitance Pins 1 to 2 Ci 1, 2 5 pF Input 1 resistance to ground f = 100 MHz Pin 1 Ri1 1.2 k Input 1 capacitance to ground f = 100 MHz Pin 1 Ci1 9 pF 4 (14) Rev. A2, 11-Oct-00 U4255BM Electrical Characteristics (continued) Test conditions (unless otherwise specified): VS = 8.5 V, Tamb = 25°C. For AC parameters: fiRF = 100 MHz, Rg = 50 , fMOD = 0.4 kHz, ∆f = 75 kHz, fIF = 450 kHz, reference point Pin 4 ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ Parameter Test Conditions / Pins Symbol Min. Typ. Max. Unit Input 2 resistance to ground f = 100 MHz Pin 2 Ri2 1.6 k Input 2 capacitance to ground f = 100 MHz Pin 2 Ci2 7 pF Output capacitance to GND Pins 43, 44 Co 43, 5 pF Gmin Gmax 19 30 dB dB o44 1st IF FM Amplifier Digitally adjustable gain 3 bit, 10.7 MHz Input resistance Pin 38 Ri38 330 Output resistance Pin 30 Ro30 330 Temperature coefficient of the gain at Gmin Gmin, Bit 66 = 0 TKmin 0.044 dB/K Temperature coefficient of the gain at Gmax Gmax, Bit 66 = 1 TKmax 0.039 dB/K vMPX 140 mV 0.3 % FM Demodulator (Pin 11) Output voltage viPin 23, 24 = 40 mV f = 450 kHz Deviation = ± 22.5kHz, fMOD = 1 kHz Total distortion Bandwidth 2nd IF filter = 120 kHz, deviation = 75 kHz 3-Wire Bus Description 8-bit command 14857 EN DATA LSB BYTE 1 MSB BYTE 1 MSB LSB CLK 24-bit command EN DATA LSB BYTE 2 MSB LSB BYTE 3 MSB CLK e.g., R-Divider IPD3 IPD1 20 21 22 23 24 25 26 27 28 29 2 10 2 11 2 12 2 13 2 14 2 15 P–2 0 P–2 1 P–2 2 Status 0 R–Divider OSCB IPD4 IPD2 0 0 Addr. Figure 3. Pulse diagram Rev. A2, 11-Oct-00 5 (14) U4255BM Data Transfer ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁ Á ÁÁ ÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁ Á ÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁ ÁÁÁÁ ÁÁÁ ÁÁ Á ÁÁÁÁ ÁÁÁ ÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁ Á ÁÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ A24_100 MSB BYTE 3 LSB MSB ADDR. AM/FM/WB Gain-FM IF-amplifier 1 0 0 AM FM B93 B92 B91 BYTE 2 Search B90 B89 B88 LSB Width of window OSC-divider/multipath sensitivity B87 B84 B86 B85 B83 B82 MSB BYTE 1 Field strength BWmpx. B80 B79 B81 LSB Time window stop signal B78 B77 B76 B75 B74 B73 A24_101 MSB BYTE 3 ADDR. WBDemod-Gain Start Smute LSB B72 B70 MSB BYTE 2 Smute Tk-fmzf B67 B66 LSB MSB BYTE 1 FM AGC AM-AGC FM BW IF2 IF2 center frequency B65 B63 B61 B59 LSB MP FS FM ext B55 B54 1 0 1 B71 B69 B68 B64 B62 B60 B58 B57 B56 Not used x x B53 B52 A8_100 MSB ADDR. 1 0 0 BYTE 1 Test LSB MPoff Mute B8 B7 NK-Sensor 0 B9 B6 B5 A8_101 MSB ADDR. 1 0 1 BYTE 1 Optimize LSB Band width 0 B4 B3 B2 B1 B0 Bus Timing tR tF Enable tHEN tS tF tR Data tHDA tS tR tF Clock tH tL 96 11826 Figure 4. Bus timing 6 (14) Rev. A2, 11-Oct-00 U4255BM Bus Control The operating mode is set by the Bits 92 and 93. In AM mode (Bits 92 and 93), Bits 81 to 83 set the divide factor of the AM prescaler AM/FM/Weather Channel Bit 93 Bit 92 Standby 0 0 Divider AM Mixer 1 Bit 93 Bit 92 Bit 84 Bit 83 Bit 82 Bit 81 FM 0 1 Divide by 10 1 0 x 0 0 0 AM 1 0 Divide by 6 1 0 x 0 0 1 Weather band 1 1 Divide by 7 1 0 x 0 1 0 Divide by 8 1 0 x 1 0 0 Divide by 4 1 0 x 1 0 1 The Bits 89 to 91 control gain of the FM IF amplifier. Gain FM-IF Bit 91 Bit 90 Bit 89 19 dB 0 0 0 21 dB 0 0 1 23 dB 0 1 0 25 dB 0 1 1 27 dB 1 0 0 28 dB 1 0 1 29 dB 1 1 30 dB 1 1 In FM mode and in weather band mode (bit 92), the Bits 81 to 84 set the sensitivity of the MNC Sensitivity Multipath Bit 93 Bit 92 Bit 84 Bit 83 Bit 82 Bit 81 Off x 1 0 0 0 0 Low x 1 0 0 0 1 x 1 0 0 1 0 0 x 1 0 0 1 1 1 x 1 0 1 0 0 x 1 0 1 0 1 x 1 0 1 1 0 x 1 0 1 1 1 Bit 88 switches the search mode on/off. Normal Station Search Bit 88 x 1 1 0 0 0 Receive 0 x 1 1 0 0 1 1 x 1 1 0 1 0 x 1 1 0 1 1 x 1 1 1 0 0 x 1 1 1 0 1 x 1 1 1 1 0 x 1 1 1 1 1 Search Bits 85 to 87 select the search-stop deviation from the center frequency. Search-Stop Window Bit 87 Bit 86 Bit 85 0.5 kHz 0 0 0 1.1 kHz 0 0 1 2.3 kHz 0 1 0 4.8 kHz 0 1 1 10 kHz 1 0 0 1 0 1 Field Strength Narrow Band / Wide Band Bit 80 20 kHz 40 kHz 1 1 0 Field strength at Pin 16 (wide band) 0 80 kHz 1 1 1 Field strength from AGC (narrow band) 1 Rev. A2, 11-Oct-00 High Bit 80 switches between narrow band field strength information and wide band field strength information. 7 (14) U4255BM Bit 79 controls the bandwidth of the lowpass filter of the MPX output. Bandwidth MPX Lowpass Filter Bit 79 90 kHz 0 180 kHz 1 The stop counter calculates an average center frequency during the time wich is set by the Bits 73 to 78. Time Window for Stop Signal Bit 78 Bit 77 Bit 76 Bit 75 Bit 74 Bit 73 1 3.1969 ms 0 0 0 0 0 1 ..... 63 3.1969 ms 1 1 1 1 1 Bit 67 sets the maximum reduction of the MPX signal level. Max Value of Soft Mute Bit 67 30 dB 0 26 dB 1 Temperature coefficient setting of FM IF amplifier. Temperature Coefficient (TC) of the IF amplifier Bit 66 TK 1 0 TK 2 1 1 The demodulator gain for the weather band mode is set by the Bits 71 and 72. Demodulator Gain in Weather Band Mode Bit 72 Bit 71 5 0 0 10 0 1 20 1 0 50 1 1 Level Control of the FM AGC threshold. FM AGC Threshold Bit 65 Bit 64 103 dBV 0 0 97 dBV 0 1 92 dBV 1 0 85 dBV 1 1 Level Control of the AM AGC threshold. For soft mute, the MPX signal level will be reduced depending on the input signal strength. Bits 68 to 70 set the input signal field strength, at which the MPX signal will be reduced by 3 dB (for soft mute). The absolute value depends on the IF-gain Bit 89 – 91. AM AGC Threshold Bit 63 Bit 62 102 dBV 0 0 105 dBV 0 1 107 dBV 1 0 108 dBV 1 1 Start Soft Mute Bit 70 Bit 69 Bit 68 at low fieldstrength 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 FM Bandwidth Mixer 2 Bit 61 Bit 60 1 0 1 150 kHz 0 0 1 1 0 200 kHz 0 1 1 1 1 250 kHz 1 0 450 kHz 1 1 at high fieldstrength 8 (14) Bits 60 and 61 control the bandwidth of the 2nd mixer output tank, in FM mode. Rev. A2, 11-Oct-00 U4255BM Setting of the center frequency of the integrated FM band filter and demodulator. The bit 52 is not used. Setting of the center frequency-offset of the integrated FM band filter. If Bit 4 = 0 the default setting (0 kHz) is used. IF Center Bit 59 Bit 58 Bit 57 Bit 56 450.00 kHz 0 0 0 0 456.25 kHz 0 0 0 1 – 0 kHz 0 0 0 0 461.50 kHz 0 0 1 0 – 6.25 kHz 0 0 0 1 468.75 kHz 0 0 1 1 – 12.50 kHz 0 0 1 0 475.00 kHz 0 1 0 0 – 8.75 kHz 0 0 1 1 481.25 kHz 0 1 0 1 – 25.00 kHz 0 1 0 0 487.50 kHz 0 1 1 0 – 31.25 kHz 0 1 0 1 493.75 kHz 0 1 1 1 – 37.50 kHz 0 1 1 0 450.00 kHz 1 0 0 0 – 43.75 kHz 0 1 1 1 443.75 kHz 1 0 0 1 + 0 kHz (default) 1 0 0 0 437.50 kHz 1 0 1 0 + 6.25 kHz 1 0 0 1 431.25 kHz 1 0 1 1 + 12.50 kHz 1 0 1 0 + 8.75 kHz 1 0 1 1 425.00 kHz 1 1 0 0 + 25.00 kHz 1 1 0 0 418.75 kHz 1 1 0 1 + 31.25 kHz 1 1 0 1 412.50 kHz 1 1 1 0 + 37.50 kHz 1 1 1 0 406.25 kHz 1 1 1 1 + 43.75 kHz 1 1 1 1 IF Correction Bit 17 Bit 16 Bit 15 Bit 14 Setting of the bandwidth of the adjacent channel detector filter. Function of Pin 20 setting is done by Bit 55. Pin 21: IF out/ Field Strength for Multipath Bit 55 2nd IF output 0 Multipath field strength 1 If Bit 4 = 0 the default setting (76 kHz) is used. IF Correction Setting Bit 54 = 1 enables the use of an additional external band filter (Pin 23/24 to Pin 28), in FM mode. 2nd IF Filter Bit 54 Internal filter 0 External and internal filter 1 Setting Bit 53 activates the automatic demodulator fine tuning which is used in weatherband mode. In FM the default setting is B53 = 1. Bit 13 Bit 12 Bit 11 Bit 10 3 kHz 0 0 0 0 46 kHz 0 0 0 1 17.5 kHz 0 0 1 0 60 kHz 0 0 1 1 31 kHz 0 1 0 0 76 kHz (default) 0 1 0 1 54 kHz 0 1 1 0 90 kHz 0 1 1 1 61 kHz 1 0 0 0 106 kHz 1 0 0 1 76 kHz 1 0 1 0 120 kHz 1 0 1 1 90 kHz 1 1 0 0 Demodulator Fine Adjust Bit 53 136 kHz 1 1 0 1 Fine tuning ON 0 105 kHz 1 1 1 0 Fine tuning OFF 1 151 kHz 1 1 1 1 Rev. A2, 11-Oct-00 9 (14) U4255BM Setting Bit 9 activates test mode. Bit 4 = 1 activates bit 10 to bit 17. If Bit 4 = 0 then the default seting is used. Mode Bit 9 Normal operation 0 Testmode 1 Activate Bit 10 to Bit 17 Bit 4 Disable Bits 10 to 17 0 Enable Bits 10 to 17 1 Bit 8 = 0 activates the multipath noise canceller. Bits 0 to 3 set the band width of the integrated band filter. Multipath Noise Canceller Bit 8 Active 0 Not active 1 Bit 7 = 1 mutes the MPX output. IF Band Width Bit 3 Bit 2 Bit 1 Bit 0 200 kHz 0 0 0 0 190 kHz 0 0 0 1 180 kHz 0 0 1 0 170 kHz 0 0 1 1 Mute of MPX Output Bit 7 160 kHz 0 1 0 0 MPX out, Pin 11 0 150 kHz 0 1 0 1 Mute MPX 1 140 kHz 0 1 1 0 130 kHz 0 1 1 1 120 kHz 1 0 0 0 110 kHz 1 0 0 1 100 kHz 1 0 1 0 90 kHz 1 0 1 1 Bits 6 and 5 set the center frequency of the adjacent channel sensor. Center Frequency Adjacent Channel Sensor Bit 6 450 kHz 0 0 80 kHz 1 1 0 0 300 kHz 0 1 70 kHz 1 1 0 1 700 kHz 1 0 60 kHz 1 1 1 0 Filter off 1 1 50 kHz 1 1 1 1 10 (14) Bit 5 Rev. A2, 11-Oct-00 U4255BM Test Circuit Test point 50 1 44 2 43 3 42 4 41 5 40 6 39 7 38 8 37 9 36 10 35 11 34 12 33 13 32 14 31 15 30 16 29 17 28 18 27 19 26 20 25 21 24 22 23 VS 50 VS 50 Pin 29 50 470 50 V VS V3 Pin 29 V 50 Bus V VS 50 14906 Figure 5. Test circuit Rev. A2, 11-Oct-00 11 (14) 12 (14) 1nF 220 nF C 117 10nF C 54 470k C 53 47 R 16 MPF102 J109 T301 BC848C 2.7k R 12 2.2 H L9 68 H 68 H 2 47k R 112 L 102 2.2 H 220 nF C 44 470 R 104 100 nF C 113 F102 C 40 6.8pF C 107 D 101 7 10nF 10nF S391D 3.9pF 5 H L 301 C 103 D 103 C 102 3 4 C 104 18pF FMV F101 BB804 D 102 68k R 102 1nF 2 C 110 1 4 3 10nF 10pF C 301 680 R 103 4 41 C 307 100nF C 201 10nF 42 4.7n F 43 C 109 1 44 270pF C 313 AM/ZF1 F201 C 108 3 BB804 1 6 390 R 10 10 R 105 220 nF T101 BFR93A 10pF C 106 1 3 2.2k R 11 T302 BC858C 1k R8 10 F C 112 C 306 15pF L8 L7 10nF C 209 2 6 7 100nF C 308 5 40 10 F C 303 7 38 T301 BC858C S391D D 302 S391D D 301 100nF C 311 6 39 KR201 10.7MHz R 201 270 68k R 122 68k R 121 8 37 470nF C 204 10k R 202 10nF C 202 22n F C 304 9 36 1nF 34 33 100nF 12 C 114 100nF C 116 R 151 8.2k R 113 10k 5.6k R 131 6.8pF C 133 220nF 11 U4255BM C 115 10 35 10nF 10 F R 111 200k C 206 C 205 C 203 14 31 22pF 1nF C 134 330pF C 152 D 131 7 FM0 1 20 1 15 30 C 132 F131 47pF C 131 BB804 3 13 32 220nF C 207 2 C 151 10nF 19 16 29 3 18 17 28 C 208 220nF 4 17 18 27 KF302 450kHz 220nF C 309 16 19 26 10nF 5 10nF C 157 6 2.2k R 303 21 7 14 22pF 13 8 3 9 12 100 F 10.25 MHz 22 23 C 153 1.5nF C 310 2 4 Q151 100nF C 313 F302 AM/ZF2 24 C 155 100nF 15 C 156 20 25 1 7 6 U4256BM KR202 10.7 MHz 22pF C 154 14522 10 11 10 R 152 10nF C 312 10 R 106 MP8 MP7 MP6 MP12 MP11 MP10 MP5 MP4 MP9 MP3 MP2 MP1 FELD ADJ MPX EN CLOCK DATA STOP IF2 HUB DPLPF UG10V U4255BM Application Board Schematic Figure 6. Application board schematic Rev. A2, 11-Oct-00 U4255BM Package Information Package SSO44 Dimensions in mm 9.15 8.65 18.05 17.80 7.50 7.30 2.35 0.3 0.25 0.10 0.8 0.25 10.50 10.20 16.8 44 23 technical drawings according to DIN specifications 13040 1 Rev. A2, 11-Oct-00 22 13 (14) U4255BM Ozone Depleting Substances Policy Statement It is the policy of Atmel Germany GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances (ODSs). The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs and forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on these substances. Atmel Germany GmbH has been able to use its policy of continuous improvements to eliminate the use of ODSs listed in the following documents. 1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively 2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental Protection Agency (EPA) in the USA 3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively. Atmel Germany GmbH can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances. 2. We reserve the right to make changes to improve technical design and may do so without further notice. Parameters can vary in different applications. All operating parameters must be validated for each customer application by the customer. Should the buyer use Atmel Wireless & Microcontrollers products for any unintended or unauthorized application, the buyer shall indemnify Atmel Wireless & Microcontrollers against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. Data sheets can also be retrieved from the Internet: http://www.atmel–wm.com Atmel Germany GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 (0)7131 67 2594, Fax number: 49 (0)7131 67 2423 14 (14) Rev. A2, 11-Oct-00