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| U4289BM AM / FM - PLL Description The U4289BM is an integrated circuit in BICMOS technology for frequency synthesizers. It performs all the functions of a PLL radio tuning system and is controlled by an I2C bus. The device is designed for all frequency synthesizer applications in radio receivers, as well as RDS ( Radio Data System ) applications. Features D Reference oscillator up to 15 MHz D Two programmable 16 bit dividers adjustable from 2 to 65535 D High signal/noise ratio D Fine tuning steps: AM y 1 kHz FM y 2 kHz D Few external component required due to integrated loop-push-pull stage for AM/FM Ordering Information Extended Type Number U4289BM-MFP U4289BM-MFPG3 Package SO16 plastic SO16 plastic Remarks Taping according to IEC-286-3 Block Diagram OSCIN 14 Oscillator OSCOUT 15 SCL SDA AS FMOSC 2 3 4 6 Phase detector I2C bus interface Current sources 9 10 N-divider 1 VDD 16 GND1 12 13 PDAMO VA R-divider Switching output 5 11 SWO1 PDAM PDFMO PDFM AMOSC 8 AM/FM switch 7 GND2 95 10822 Figure 1. Block diagram Rev. A5, 14-Nov-01 1 (10) U4289BM Pin Description VDD SCL 1 2 3 4 5 6 7 8 95 10823 16 15 14 13 12 11 9 10 GND1 OSCOUT OSCIN VA PDAMO PDAM PDFM PDFMO Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol VDD SCL SDA AS SWO1 FMOSC GND 2 AMOSC PDFM PDFMO PDAM PDAMO VA OSCIN GND1 Function Supply voltage I2C bus clock I2C bus data Address selection Switching output FM oscillator input Ground 2 (analog) AM oscillator input FM current output FM analog output AM current output AM analog output Analog supply voltage Oscillator input Ground 1 (digital) SDA AS SWO1 FMOSC GND 2 AMOSC OSCOUT Oscillator output Figure 2. Pinning Functional Description The U4289BM is controlled via the 2-wire I2C bus. For programming there are one module address byte, two subaddress bytes and five data bytes. The module address contains a programmable address bit A 1 which with address select input AS (Pin 4) makes it possible to operate two U4289BM in one system. If bit A 1 is identical with the status of the address select input AS, the chip is selected . The subaddress determines which one of the data bytes is transmitted first. If subaddress of R-divider is transmitted, the sequence of the next data bytes is DB 0 (Status), DB 1 and DB 2. If subaddress of N-divider is transmitted, the sequence of the next data bytes is DB 3 and DB 4. The bit organisation of the module address, subaddress and 5 data bytes are shown in figure 6. Each transmission on the I2C bus begins with the "START"- condition and has to be ended by the "STOP"condition (see figure 7). The integrated circuit U4289BM has two separate inputs for AM and FM oscillator. Pre-amplified AM and FM signals are fed to the 16 bit N-divider via AM/FM switch. AM/FM switch is controlled by software. Tuning steps can be selected by 16 bit R-divider. Further there is a digital memory phase detector. There are two separate current sources for AM and FM amplifier (charge pump) as given in electrical characterisitics. It allows independent adjustment of gain, whereby providing high current for high speed tuning and low current for stable tuning. 2 (10) Rev. A5, 14-Nov-01 U4289BM Absolute Maximum Ratings Parameters Supply voltage Pin 1 Input voltage Pins 2, 3, 4, 6, 8, 14 and 15 Output current Pins 3 and 5 Output drain voltage Pin 5 Analog supply voltage Pin 13 with 220 W seriell resistance 2 minutes 1) Output current Pins 9 and 12 Ambient temperature range Storage temperature range Junction temperature Electrostatic handling (modified MIL STD 883 D method 3015.7: all supply pins connected together) 1) Symbol VDD VI IO VOD VA VA IAO Tamb Tstg Tj "VESD Value -0.3 to +6 -0.3 to VDD + 0.3 -1 to +5 15 6 to 15 24 -1 to +20 -30 to +85 -40 to +125 125 1000 Unit V V mA V V V mA _C _C _C V corresponding our application circuit (page 7) Thermal Resistance Parameters Junction ambient Symbol RthJA Value 160 Unit K/W Rev. A5, 14-Nov-01 3 (10) U4289BM Electrical Characteristics VDD = 5 V, VA = 10 V, Tamb = 25C, unless otherwise specified Parameters Supply voltage Quiescent supply current AM-mode FM-mode FM input sensitivity, RG = 50 W FMOSC fi = 70 to 120 MHz fi = 160 MHz AM input sensitivity, RG = 50 W AMOSC fi = 0.6 to 35 MHz Oscillator input sensitivity, RG = 50 W OSCIN fi = 0.1 to 15 MHz Phase detector PDFM Output current 1 Output current 2 Leakage current Phase detector PDAM Output current 1 Output current 2 Leakage current Analog output PDFMO, PDAMO Saturation voltage LOW HIGH I2C bus SCL, SDA, AS Input voltage HIGH LOW Output voltage Acknowledge LOW Clock frequency Rise time SDA, SCL Fall time SDA, SCL Period of SCL HIGH LOW Setup time Start condition Data Stop condition Time space 1) tsSTA tsDAT tsSTOP twSTA 4.7 250 4.7 4.7 ms ns ms ms HIGH LOW Pins 2, 3 and 4 ViBUS 3.0 0 Pin 3 ISDA = 3 mA Pin 2 Pins 2 and 3 Pins 2 and 3 Pin 2 tH tL 4.0 4.7 VO fSCL tr tf 0.4 100 1 300 V kHz ms ns ms ms VDD 1.5 V V Pins 9 and 12 I = 15 mA VsatL VsatH 9.5 200 9.95 400 mV V Pin 11 Pin 11 Pin 11 "IPDAM "IPDAM "IPDAML 160 40 200 50 240 60 20 mA mA nA Pin 10 Pin 10 Pin 10 "IPDFM "IPDFM "IPDFML 1600 400 2000 500 2400 600 20 mA mA nA Pin 14 VSOSC 100 mVrms Pin 8 VSAM 40 mVrms Test conditions / Pin Pin 1 Pin 1 Symbol VDD IDD Min. 4.5 Typ. 5.0 4.0 4.0 40 150 Max. 5.5 7.0 7.0 Unit V mA Pin 6 Pin 6 VSFM VSFM mVrms mVrms 4 (10) Rev. A5, 14-Nov-01 U4289BM Parameters Hold time Start condition DATA 1) Test conditions / Pin Symbol thSTA thDAT Min. 4.0 0 Typ. Max. Unit ms ms This is a space of time where the bus must be free from data transmission and before a new transmission can be started. 14 12 10 VSFM ( mV ) 8 6 4 2 0 20 13354 14 T = 85C 12 10 VDD = 5.5 V 5.0 V 4.5 V VSFM ( mV ) 8 6 4 2 0 20 13355 T = -30C VDD = 5.5 V 5.0 V 4.5 V 40 60 80 fiFM ( MHz ) 100 120 40 60 80 fiFM ( MHz ) 100 120 Figure 3. FM input sensitivity 100 T = 85C 100 T = -30C VSAM ( mV ) 10 VSAM ( mV ) VDD = 5.5 V 5.0 V 4.5 V 10 VDD = 5.5 V 5.0 V 4.5 V 1 0.1 13353 1.0 10.0 fiAM ( MHz ) 100.0 13356 1 0.1 1.0 10.0 fiAM ( MHz ) 100.0 Figure 4. AM input sensitivity Rev. A5, 14-Nov-01 5 (10) U4289BM Bus Timing SDA twSTA tr tf thSTA SCL P S thSTA tL thDAT tH tsSTA thDAT tsSTOP P P = Stop, S = Start Figure 5. Bus timing 95 10122 6 (10) Rev. A5, 14-Nov-01 U4289BM Bit Organization Module address MSB 1 A7 1 A6 0 A5 0 A4 1 A3 0 A2 0/1 A1 LSB 0 A0 Subaddress (R-divider) X X X 0 0 1 X X Subaddress (N-divider) X X X X 1 1 X X Data byte 0 (Status) MSB SWO1 D7 D6 D5 D4 AM/ FM D3 PD ANA D2 PD POL D1 LSB PD CUR D0 Data byte 1 215 R-divider 28 Data byte 2 27 R-divider 20 Data byte 3 215 N-divider 28 Data byte 4 27 N-divider 20 AM/FM PD - ANA PD - POL PD - CUR LOW FM-operation PD analog Negative polarity Output current 2 Figure 6. HIGH AM-operation TEST Positive polarity Output current 1 Rev. A5, 14-Nov-01 7 (10) U4289BM Transmission Protocol MSB S LSB Address A7 A0 A Subaddress R-divider A Data 0 A Data 1 A Data 2 A P MSB S LSB Address A7 A0 P = Stop A Subaddress N-divider A Data 3 A Data 4 A A P S = Start A = Acknowledge Figure 7. Application Circuit 6...15 V 110 100 F 16 V 110 3 k C6*) C1*) 27 pF 4 MHz 16 15 14 13 12 11 27 pF R2*) R1*) C5*) FMOSC C2*) 10 9 C3 100 nF U4289BM 1 2 3 4 5 1 nF 27 5V 12k 12k *) Values depend on the step frequency and used varicaps Figure 8. Application circuit 6 7 8 2.2 nF AMOSC 100 nF 95 10824 C4 100 F 6.3 V 8 (10) Rev. A5, 14-Nov-01 U4289BM Recommendations for Applications D C3 = 100 nF should be very close to Pin 1 (VDD) and Pin 16 (GND 1) D GND 2 (Pin 7 - analog ground) and GND 1 (Pin 16 - digital ground) must be connected according to figure 8 D 4 MHz crystal must be very close to Pin 14 and Pin 15 D Components of the charge pump (C1/R1 for AM and C2/R2 for FM) should be very close to Pin 11 with respect to Pin 10. PCB-Layout GND C1 C2 16 15 14 13 12 11 10 9 C4 VDD C3 1 2 3 4 5 6 7 8 95 10825 Figure 9. PCB layout Package Information Package SO16 Dimensions in mm 10.0 9.85 5.2 4.8 3.7 1.4 0.4 1.27 8.89 16 9 0.25 0.10 0.2 3.8 6.15 5.85 technical drawings according to DIN specifications 13036 1 8 Rev. A5, 14-Nov-01 9 (10) U4289BM 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. 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 10 (10) Rev. A5, 14-Nov-01 |
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