TV TUNER IC

www.DataSheet4U.com SN761678B TV TUNER IC www.ti.com SLES185 – JUNE 2006 FEATURES • • • • • • • Single-Chip Mixer/Oscillator and Phase-Locked Loop (PLL) Synthesizer Three-Band Local Oscillator I2C Bus Protocol (Bidirectional Data Transmission) 30-V Tuning Voltage Output Four NPN-Type Band-Switch Drivers Programmable Reference Divider Ratio (512, 640, or 1024) External 4-Pin Intermediate Frequency (IF) Filter Between Mixer Output and IF Amplifier Input 5-V Power Supply 30-Pin Thin Shrink Small-Outline Package (TSSOP) DBT PACKAGE (TOP VIEW) • • VHI OSC C VHI OSC B OSC GND VLO OSC C VLO OSC B UHF OSC B1 UHF OSC C1 UHF OSC C2 UHF OSC B2 IF GND VCC IF OUT CP VTU XTAL 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 UHF RF IN VHF RF IN BS4 RF GND MIX OUT2 MIX OUT1 IF IN2 IF IN1 BS2 BS1 BS3 ADC AS SDA SCL P0038-01 APPLICATIONS • • • TVs VCR/DVD Recorders Set-Top Boxes DESCRIPTION The SN761678B is a synthesized tuner IC designed for TV tuning systems. The circuit consists of a phase-locked loop (PLL) synthesizer, three-band local oscillator and mixer, 30-V output tuning amplifier, and four NPN band-switch drivers. The device is available in a small-outline package. A 15-bit programmable counter and reference divider are controlled by I2C bus protocol. Tuning step frequency is selectable by this reference divider ratio for a crystal oscillator. blk blk blk blk blk blk This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2006, Texas Instruments Incorporated SN761678B TV TUNER IC SLES185 – JUNE 2006 www.ti.com FUNCTIONAL BLOCK DIAGRAM UHF OSC B1 UHF OSC C1 UHF OSC C2 UHF OSC B2 VLO OSC B VLO OSC C VHI OSC B VHI OSC C MIX OUT1 MIX OUT2 OSC GND IF IN1 IF IN2 VHF-L Oscillator VHF-H Oscillator UHF Oscillator IF Amplifier IF OUT VCC VHF RF IN VHF Mixer UHF Mixer IF GND UHF RF IN CP 1/8 Prescaler RF GND XTAL Oscillator 4 MHz 1/32, 1/33 Prescaler 15-Bit Counter Operational Amplifier VTU XTAL 512/640/1024 Divider Phase Detector Charge Pump NPN Band-Switch Port SCL SDA AS 5-Level ADC I C Bus Interface 2 BS2 ADC BS1 BS3 BS4 B0089-02 2 Submit Documentation Feedback www.ti.com SN761678B TV TUNER IC SLES185 – JUNE 2006 Terminal Functions TERMINAL NAME ADC AS BS1 BS2 BS3 BS4 CP IF GND IF IN1 IF IN2 IF OUT MIX OUT1 MIX OUT2 OSC GND RF GND SCL SDA UHF OSC B1 UHF OSC B2 UHF OSC C1 UHF OSC C2 UHF RF IN VCC VHF RF IN VHI OSC B VHI OSC C VLO OSC B VLO OSC C VTU XTAL NO. 19 18 21 22 20 28 13 10 23 24 12 25 26 3 27 16 17 6 9 7 8 30 11 29 2 1 5 4 14 15 ADC input Address selection input Band-switch 1 output (NPN emitter follower) Band-switch 2 output (NPN emitter follower) Band-switch 3 output (NPN emitter follower) Band-switch 4 output (NPN emitter follower) Charge-pump output IF ground IF amplifier input 1 IF amplifier input 2 IF output Mixer output 1 Mixer output 2 Oscillator ground RF ground Serial clock input Serial data input/output UHF oscillator base 1 UHF oscillator base 2 UHF oscillator collector 1 UHF oscillator collector 2 UHF RF input Supply voltage for mixer/oscillator/PLL: 5 V VHF RF input VHF HIGH oscillator base VHF HIGH oscillator collector VHF LOW oscillator base VHF LOW oscillator collector Tuning voltage amplifier output 4-MHz crystal oscillator input Figure 12 Figure 13 Figure 13 Figure 14 Figure 14 Figure 15 Figure 16 Figure 8 Figure 9 Figure 10 Figure 10 Figure 10 Figure 10 Figure 11 Figure 3 Figure 3 Figure 6 Figure 7 Figure 7 DESCRIPTION SCHEMATIC Figure 1 Figure 2 Figure 4 Figure 4 Figure 4 Figure 4 Figure 5 150 kW 19 18 50 kW S0159-01 S0133-03 Figure 1. Figure 2. Submit Documentation Feedback 3 SN761678B TV TUNER IC SLES185 – JUNE 2006 www.ti.com 23 20 p 24 20 p 20 21 22 50 kW 28 S0138-02 Figure 3. Figure 4. 12 13 S0155-01 S0156-01 Figure 5. 25 26 Figure 6. 16 S0160-01 S0136-03 Figure 7. Figure 8. 4 Submit Documentation Feedback www.ti.com SN761678B TV TUNER IC SLES185 – JUNE 2006 8 17 9 3 kW 3 kW 7 6 S0133-02 S0130-01 Figure 9. Figure 10. 30 29 S0142-05 S0142-04 Figure 11. Figure 12. 1 4 2 5 3 kW 3 kW 3 kW 3 kW S0129-01 S0129-02 Figure 13. Figure 14. Submit Documentation Feedback 5 SN761678B TV TUNER IC SLES185 – JUNE 2006 www.ti.com 14 15 S0158-01 S0157-01 Figure 15. Figure 16. Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) Supply voltage range, VCC (2) Input voltage 1, VGND (2) Input voltage 2, VVTU (2) Input voltage 3, VIN (2) (1) VCC (pin 11) OSC GND, RF GND (pins 3, 27) VTU (pin 14) Other pins (1, 2, 4–9, 12, 13, 15–26, 28–30) TA ≤ 25°C –0.4 V to 6.5 V –0.4 V to 0.4 V –0.4 V to 35 V –0.4 V to 6.5 V 1071 mW –20°C to 85°C –65°C to 150°C 150°C Continuous total dissipation, PD (3) Operating free-air temperature range, TA Storage temperature range, Tstg Maximum junction temperature, TJ Maximum short-circuit time, tSC(max) (1) (2) (3) Each pin to VCC or to GND 10 s Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. Voltage values are with respect to the IF GND of the circuit. Derating factor is 8.57 mW/°C for TA ≥ 25°C. Recommended Operating Conditions MIN Supply voltage, VCC Tuning supply voltage, VTU Output current of band switch, IBS Operating free-air temperature, TA One port on –20 4.5 NOM 5 30 MAX 5.5 33 10 85 UNIT V V mA °C 6 Submit Documentation Feedback www.ti.com SN761678B TV TUNER IC SLES185 – JUNE 2006 Electrical Characteristics – Total Device and Serial Interface VCC = 4.5 V to 5.5 V, TA = –20°C to 85°C (unless otherwise noted) PARAMETER ICC1 ICC2 VIH VIL IIH IIL VPOR Supply current 1 Supply current 2 High-level input voltage (SCL, SDA) Low-level input voltage (SCL, SDA) High-level input current (SCL, SDA) Low-level input current (SCL, SDA) Power-on-reset supply voltage (threshold of supply voltage between reset and operation mode) Address-select high-input voltage (AS) Address-select mid1-input voltage (AS) Address-select mid2-input voltage (AS) Address-select low-input voltage (AS) Address-select high-input current (AS) Address-select low-input current (AS) ADC input voltage ADC high-level input current ADC low-level input current Low-level output voltage (SDA) High-level output leakage current (SDA) Clock frequency (SCL) I2C Timing (see Figure 17) thd(DAT) t(BUF) thd(STA) t(Low) t(High) tsu(STA) tsu(DAT) tr tf tsu(STO) Data hold time Bus free time Start hold time SCL-low hold time SCL-high hold time Start setup time Data setup time SCL, SDA rise time SCL, SDA fall time Stop setup time 0.6 0 1.3 0.6 1.3 0.6 0.6 0.1 0.3 0.3 µs µs µs µs µs µs µs µs µs µs VCC = 5 V VCC = 5 V VCC = 5 V VCC = 5 V VCC = 5 V, TA = 25°C VCC = 5 V, TA = 25°C See Table 8 VADC = VCC VADC = 0 V VCC = 5 V, IOL = 3 mA VSDA = 5.5 V 100 –50 0.4 10 400 –50 0 VCC 10 –10 2.1 2.8 3.6 One band switch on (IBS = 10 mA) 2.8 TEST CONDITIONS MIN TYP 60 70 VCC 1.4 10 MAX UNIT mA mA V V µA µA V I2C Interface VASH VASM1 VASM2 VASL IASH IASL VADC IADH IADL VOL lSDAH fSCL 4.5 2 1 5 3 1.5 0.5 140 V V V V µA µA V µA µA V µA kHz Submit Documentation Feedback 7 SN761678B TV TUNER IC SLES185 – JUNE 2006 www.ti.com Electrical Characteristics – PLL and Band Switch VCC = 4.5 V to 5.5 V, TA = –20°C to 85°C (unless otherwise noted) PARAMETER N fXTAL ZXTAL VIXTAL2 VVTUL IVTUOFF ICPH ICPL VCP ICPOFF IBS VBS1 VBS2 IBSOFF Divider ratio Crystal oscillator frequency Crystal oscillator input impedance Minimum reference input sensitivity (XTAL) Tuning amplifier low-level output voltage Tuning amplifier leakage current (off) Charge-pump high-level input current Charge-pump low-level input current Charge-pump output voltage Charge-pump leakage current Band-switch driver output current Band-switch driver output voltage Band-switch driver leakage current IBS = 10 mA IBS = 10 mA, VCC = 5 V, TA = 25°C VBS = 0 V 3 3.5 3.9 3 4 MHz, ac coupling with 0.1-µF capacitor RL = 22 kΩ, VTU = 33 V OS = 1, VTU = 33 V CP = 1 CP = 0 PLL locked T2 = 0, T1 = 1, VCP = 2 V, TA = 25°C –15 280 60 1.95 15 10 0.4 TEST CONDITIONS 15-bit frequency word RXTAL = 25 Ω to 300 Ω MIN 256 3.2 4 1.6 100 0.5 10 TYP MAX 32767 4.48 MHz kΩ mVp-p V µA µA µA V nA mA V µA UNIT 8 Submit Documentation Feedback www.ti.com SN761678B TV TUNER IC SLES185 – JUNE 2006 Electrical Characteristics – Mixer, Oscillator, IF Amplifier VCC = 5 V, TA = 25°C, measured in Figure 18 reference measurement circuit at 50-Ω system, IF filter characteristics: fpeak = 43 MHz (unless otherwise noted) PARAMETER Gc11 Gc13 Gc14 Gc16 Gc17 Gc19 Gc21 Gc23 Gc24 Gc26 Gc27 Gc29 NF1 NF3 NF4 NF6 NF7 NF9 CM1 CM3 CM4 CM6 CM7 CM9 VIFO1 VIFO3 VIFO4 VIFO6 VIFO7 VIFO9 ΦOSC1 ΦOSC3 ΦOSC4 ΦOSC6 ΦOSC7