ATR4256-TKSY Atmel, ATR4256-TKSY Datasheet
ATR4256-TKSY
Specifications of ATR4256-TKSY
Related parts for ATR4256-TKSY
ATR4256-TKSY Summary of contents
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... Integrated Band Gap – Only One Supply Voltage Necessary 1. Description The ATR4256 is a synthesizer IC for FM receivers and an AM up-conversion system in BiCMOS technology. Together with the AM/FM IC ATR4258 or ATR4255, it com- prises a complete AM/FM car radio front-end, which is also recommended for RDS (Radio Data System) applications ...
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... OSCIN MX2LO 16 DATA 17 CLK FMOSCIN 20 GNDAN ATR4256 2 Function Phase detector output Pulsed current output Digital-to-analog converter 1 Digital-to-analog converter 2 Digital-to-analog converter 3 Supply voltage, analog part Switching output 1 Switching output 2 Switching output 3 Switching output 4 Ground, digital part Reference oscillator output Reference oscillator input ...
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... The ATR4256 has a very fast response time of maximum 800 µs (at 2 mA, f sured on the MPX signal). It has a high signal to noise ratio. Only one supply voltage is necessary, due to an integrated band gap. 4867D– ...
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... The loop filter has to be designed corresponding to the chosen pump current and the internal reference frequency. A recommendation can be found in the application circuit. The charge-pump current can be chosen by setting Bit 71 and B Table 4-1. Figure 4-1. VS PDO ATR4256 4 Current Charge-pump Output IPD (µA) B71 25 100 ...
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... MX2LO is the buffered output of the crystal oscillator. This signal can be used as a reference fre- quency for ATR4255 or ATR4258. The oscillator buffer output can be switched by the OSCB bit (B69) as follows. Table 4-2. Figure 4-3. 4867D–AUDR–01/08 Internal Components at FMOSCIN V5 FMOSCIN MX2LO Settings MX2LO AC Voltage ON OFF Internal Components at MX2LO V5 OSCIN ATR4256 B69 MX2LO 5 ...
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... Function of DAC1, DAC2 in FM and AM Mode (Pin 3 and Pin 4) For automatic tuner alignment, the DAC1 and DAC2 of the ATR4256 can be controlled by set- ting the gain of VPDO and offset values. Mode the gain is in the range of 0.69 –0.59V. For alignment, DAC1 and DAC2 are connected to the varicaps of the preselection fil- ters ...
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... V (PDO) (PDO The gain of DAC1 can be controlled by B36 to (PDO) B40 B39 B38 B37 ... ... ... ... ... ... ... ... B47 B46 B45 B11 B10 ... ... ... ... ... ... ATR4256 . V is the PLL (PDO) Decimal B36 Gain Decimal B0 Gain ... ... 1 53 ... ... 1 253 0 254 1 255 Decimal B44 Gain Decimal B8 Gain ... ... 1 31 ... ... ...
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... B44 to B49 (bits DAC1 Offset) and the offset of DAC2 B13 (bits DAC2 Offset) as follows: Table 4-7. Offset DAC1 Approximately Offset DAC2 Approximately 1.4606V 1.4138V 1.3665V 1.3196V –0.0079V –1.3975V –1.4447V –1.4917V Gain = 53 (intermediate position) ATR4256 8 (PDO 3. 255 = 0.01007 3V. The gain of DAC1 can be controlled by B36 to B43 DAC Gain, AM Mode B43 B42 B41 B7 B6 ...
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... Figure 4-7. 4867D–AUDR–01/08 DAC3 Offset Setting DAC3 Offset, Approximately 0.55V 1.25V 1.90V 2.60V 3.30V 4.10V 4.80V 5.45V Internal Components at DAC3 DAC3 “3-wire Bus Description” on page Internal Components at EN, DATA, CLK EN DATA CLK ATR4256 B68 B67 ...
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... OSCIN, OSCOUT (Pin 12 and Pin 13) A crystal resonator ( MHz) is connected between OSCIN and OSCOUT in order to gen- erate the reference frequency. By using the ATR4256 in connection with ATR4255 or ATR4258, the crystal frequency must be 10.25 MHz. The complete application circuit is shown in 6- reference is available, it can be applied at OSCIN. The minimum voltage should be 100 mVrms ...
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... Figure 4-9. Figure 4-10. Internal Connection of Tuning Capacity for Crystal Oscillator B78 B84 B85 4867D–AUDR–01/08 Internal Components at OSCIN and OSCOUT V5 OSCIN V5 OSCOUT Cx1 0 ... ATR4256 Cx2 INV 0 ... ...
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... Application Information Figure 5-1. 6. 3-wire Bus Description The register settings of ATR4256 are programmed by a 3-wire bus protocol. The bus protocol consists of separate commands. A defined number of bits are transmitted sequentially during each command. One command is used to program all the bits of one register. The different registers available (see “ ...
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... EN DATA LSB BYTE 1 CLK e.g. R-Divider 4867D–AUDR–01/08 t HDA MSB LSB BYTE 2 MSB LSB BYTE R-Divider HEN MSB MSB LSB BYTE 3 MSB IPD OSCB P-2 P-2 P-2 0 DAC3 Status 0 Addr. ATR4256 V HIGH V LOW V HIGH V LOW V HIGH V LOW 0 13 ...
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... BYTE 2 ADDR. DAC2 OFFSET O-2 O-2 O-2 O-2 O-2 B13 B12 B11 B10 B9 E MSB BYTE 2 ADDR. Oscillator tuning function B85 B84 B83 B82 B81 ATR4256 14 LSB MSB BYTE P B65 B64 B63 B62 B61 B60 B59 B58 LSB MSB BYTE 2 SWO1 ...
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... Symbol Value –0 – –40 to +85 amb T –40 to +125 stg T 125 j V 300 ESD Symbol Value R 140 thJA Symbol Min. Typ 8 –40 amb fXTAL 0.1 ATR4256 Unit °C °C °C V Unit K/W Max. Unit 12 V +85 °C 160 MHz 65535 15 MHz 15 ...
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... Output voltage LOW DAC1, DAC2 9.1 Output current 9.2 Output voltage Maximum offset range 9.3 Offset = 0, Gain = 53 (FM) Minimum offset range 9.4 Offset = 63, Gain = 53 (FM) *) Type means 100% tested 100% correlation tested Characterized on samples Design parameter ATR4256 16 = 8.5V 25°C. S amb Pin Symbol OSC 15 ...
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... V DAC3 5 V DAC3 5 V DAC3 BUSH 18 V BUSL HEN 16 t HDA ATR4256 Min. Typ. Max. Unit 0.63 0.69 0.75 2.1 2.16 2. 0.4 0.55 0.7 V 1.1 1.25 1.4 V 1.8 1.90 2.1 V 2.4 2.60 2.8 V 3.2 3.30 3.5 V 3.8 4.10 4.3 V 4.5 4.80 5 ...
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... Figure 10-1. Application Circuit 600 OSC FM VCO 1 V tune R 4 8.2k 330 ATR4256 18 EN CLK DATA BUS LOGIC DACs 100 DAC1 DAC2 DAC3 12V GND C 100 ( (1) 5.1k (1) depends on 10.25 MHz OSC Switches 100 100 SWO1 SWO2 SWO3 SWO4 crystal 4867D–AUDR–01/08 ...
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... Figure 10-2. Application Board Schematic 4867D–AUDR–01/08 ATR4256 19 ...
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... Ordering Information Extended Type Number ATR4256-TKSY ATR4256-TKQY 12. Package Information Package SSO20 Dimensions in mm 0.25 0. 13. Revision History Please note that the following page numbers referred to in this section refer to the specific revision mentioned, not to this document. Revision No. 4867D-AUDR-01/08 4867C-AUDR-10/07 4867B-AUDR-06/06 ATR4256 ...
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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 ...