TDA7427D STMicroelectronics, TDA7427D Datasheet
TDA7427D
Specifications of TDA7427D
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TDA7427D Summary of contents
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... IN-LOCK detection and Search/Stop sta- tion. 5 BIT PROG. INLOCK CNT DETECTOR SWITCH SWM/DIR PHASE CHARGE COMP PUMP 11 BIT PROG CNT TEST CONTROL LOGIC PORT EXTENSION 12 7 SSTOP DOUT3 TDA7427 SO20 TDA7427D (SO20) 13 DOUT1/INLOCK 2 LP_HC 3 LP_AM SWITCH 1 LP1/LP2 LP_FM - 20 LPOUT + VDD1 4 VREF 18 GNDan/GNDdig POWER ON RESET 1/21 ...
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TDA7427 ABSOLUTE MAXIMUM RATINGS Symbol V Supply Voltage DD1 V Supply Voltage DD2 P Total Power Dissipation tot T Storage Temperature stg T Ambient Temperature amb PIN CONNECTION LP_FM LP_HC LP_AM VREF OSCIN OSCOUT DOUT3 SCL SDA IF_AM THERMAL DATA ...
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PIN DESCRIPTION (TDA7427/D) PIN SYMBOL 1 LP_FM Filter OPAMP input, charge pump output (FM mode) Filter OPAMP input, charge pump output (high current LP_HC 2 mode) 3 LP_AM Filter OPAMP input, charge pump output (AM mode) 4 VREF OPAMP reference ...
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TDA7427 ELECTRICAL CHARACTERISTICS (T wise specified). Symbol Parameter V Supply Voltage DD1 V Supply Voltage DD2 I Supply Current DD1 I Supply Current DD2 I Supply Current DD1 STB RF INPUT (AM_IN, FM_IN) f Input Frequency AM iAM f Input ...
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ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter V Input Low Voltage IL V Input High Voltage IH I Input Current IN V Output Voltage SDA OUT acknowledge OSCILLATOR t Build Up Time bu C Internal Capacitance in C Internal Capacitance OUT Z ...
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TDA7427 GENERAL DESCRIPTION This circuit contains a frequency synthesiser and a loop filter for use in FM/AM radio tuning sys- tems. Only a VCO is required to build a complete PLL system. For auto search/stop operation an IF counter system ...
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Figure 1. FM and AM (SW) operation (swallow mode) OSC Table 2. Control Register Functions. REGISTER NAME PC Programmable counter for VCO frequency RC Reference counter PLL IRC Reference counter IF IFCM IF counter mode ...
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TDA7427 Figure 2. AM direct mode operation for SW, MW and LW OSC DIVIDER FROM VCO FREQUENCY TO REFERENCE FREQUENCY This divider provides a low frequency f phase is compared with the reference frequency f ...
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Figure 3. Phase comparator waveforms Figure 4. IF Counter internal block diagram IFENA IF-AM IF-FM OSC 14 BIT COUNTER IFC-REGISTER EW-REGISTER 11-21 BIT COUNTER ZD CF-REGISTER UP/DOWN COUNTER 3 BIT COUNTER DECODE IFS-REGISTER D95AU377A TDA7427 SSTOP 9/21 ...
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TDA7427 The negative input is switchable to three input pins ( LPIN 1, LPIN 2 and LPIN 3) to increase the flexibility in application. This feature allows two separate active filters for different applications A logical ”1” in the LPIN ...
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I C BUS INTERFACE DESCRIPTION 2 The TDA7427 supports the I C bus protocol. This protocol defines any device that sends data into the bus as a transmitter and the receiving device as the receiver. The device that controls ...
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TDA7427 dress being transmitted. After this comparison, the TDA7427 will generate an ”acknowledge” on the SDA line and will per- form either a read or write operation according to the state of R/W bit. Write Operation Following a START condition ...
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Data Byte Specification CHARGE PUMP CONTROL MSB LPIN1/2 CURRH PLL COUNTER 1 (LSB) MSB ...
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TDA7427 PLL COUNTER 2 (MSB) MSB ...
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LOCK DETECTOR & PLL MODE CONTROL MSB LDENA INLOCK COUNTER REFERENCE CONTROL 1 (LSB) MSB ...
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TDA7427 IF COUNTER REFERENCE CONTROL 2 (MSB) AND IF COUNTER MODE SELECT MSB ...
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IF COUNTER CONTROL 2 MSB ...
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TDA7427 OSCILLATOR ADJUST MSB ...
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DIM. MIN. TYP. MAX. MIN. TYP. a1 0.254 0.010 B 1.39 1.65 0.055 b 0.45 0.018 b1 0.25 0.010 D 25.4 E 8.5 0.335 e 2.54 0.100 e3 22.86 0.900 F 7.1 I 3.93 L 3.3 0.130 Z ...
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TDA7427 mm DIM. MIN. TYP. MAX. MIN. A 2.35 2.65 0.093 A1 0.1 0.3 0.004 B 0.33 0.51 0.013 C 0.23 0.32 0.009 D 12.6 13 0.496 E 7.4 7.6 0.291 e 1. 10.65 0.394 h 0.25 0.75 ...
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... STMicroelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics 1999 STMicroelectronics – ...