SN761688 DOWN CONVERTER www.ti.com SLES178 – APRIL 2006 FEATURES • • • • RF AGC Amplifier, Mixer, and IF Amplifier Circuits Low Distortion 5-V Power Supply 16-Pin TSSOP Package APPLICATION • CATV 16-PIN TSSOP (TOP VIEW) AGC IN1 AGC IN2 VAGC GND LO IN1 LO IN 2 VCC1 VCC2 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 MIXOUT1 MIXOUT2 GND IF IN1 IF IN 2 GND IFOUT1 IFOUT2 DESCRIPTION The SN761688 is a monolithic IC designed as an out-of-band tuner for CATV. The circuit consists of an RF AGC amplifier, mixer, and IF amplifier, and is available in a small-outline package. FUNCTIONAL BLOCK DIAGRAM AGC Amplifier AGC IN1 1 AGC IN2 Mixer 16 MIXOUT1 2 15 MIXOUT2 VAGC 3 14 GND GND 4 13 IF IN1 LO IN1 5 12 IF IN2 LO IN2 6 11 GND 10 IFOUT 2 9 IFOUT 1 Buffer VCC 1 7 IF Amplifier VCC2 8 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 SN761688 DOWN CONVERTER www.ti.com SLES178 – APRIL 2006 TERMINAL FUNCTIONS TERMINAL NAME AGC IN1 1 AGC IN2 2 VAGC 3 GND DESCRIPTION NO. 4, 11, 14 SCHEMATIC Input of AGC amplifier Figure 1 Input of gain control voltage Figure 2 Ground LO IN1 5 LO IN2 6 Input of local OSC VCC1 7 5 V power supply; AGC/Mixer/Buffer VCC2 8 5 V power supply; IF amplifier IF OUT1 9 Output of IF amplifier Figure 4 IF OUT2 10 IF IN2 12 Input of IF amplifier Figure 5 IF IN1 13 MIXOUT2 15 Output of Mixer Figure 6 MIXOUT1 16 1 k Figure 3 30 k 1 k 3 1 2 100 k Figure 1. 3 k Figure 2. 3 k 5 6 15 Ω 9 10 Figure 3. 1 k Figure 4. 1 k 12 13 16 Ω 15 16 Figure 5. 2 Figure 6. Submit Documentation Feedback SN761688 DOWN CONVERTER www.ti.com SLES178 – APRIL 2006 ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range (unless otherwise noted) Supply voltage, VCC (2) Input voltage (2) (1) VCC1,2 (Pin 7, 8) –0.4 V to 6.5 V VIN (Pins 1, 2, 3, 5, 6, 12, 13) –0.4 V to VCC TA ≤ 25°C Continuous total dissipation, PD (3) 775 mW Maximum junction temperature, TJ (1) (2) (3) 150°C 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 GND of the circuit. Derating factor is 6.2 mW/°C for TA ≥ 25°C. RECOMMENDED OPERATING CONDITIONS over operating free-air temperature range (unless otherwise noted) MIN NOM MAX Supply voltage, VCC 4.5 5 5.5 UNIT V Operating free-air temperature, TA –20 85 °C DC ELECTRICAL CHARACTERISTICS VCC = 5 V, TA = 25°C, unless otherwise noted PARAMETER TEST CONDITIONS MIN TYP ICC Supply current No signal, VAGC = 0 V 67 IIAGC Input current (VAGC) VAGC = 3 V 22 VAGCMAX AGC voltage high at maximum gain VAGCMIN AGC voltage low at minimum gain MAX UNIT mA 33 µA 3 VCC V 0 0.5 V AC ELECTRICAL CHARACTERISTICS VCC = 5 V, TA = 25°C, unless otherwise noted PARAMETER AGC amplifier and TEST CONDITIONS MIN TYP MAX UNIT mixer (1) GCMAX Maximum conversion gain VAGC = 3 V 27 30 33 dB GCMIN Minimum conversion gain VAGC = 0 V -21 -18 -15 dB GCRMIX Gain control range VAGC = 0 V to 3 V VMIXOUT Mixer output voltage VAGC = 3 V, Single-ended output NF Noise figure (2) VAGC = 3 V IM3GMX Third order intermodulation distortion fIN1 = 79.5 MHz, fIN2 = 80.5 MHz, VOUT = -10 dBm, VAGC = 3 V OIP3GMX Output intercept point 48 dB 117 dBµV 10 dB -60 dBc fIN1 = 79.5 MHz, fIN2 = 80.5 MHz, VAGC =3V 20 dBm IF amplifier (3) GVIFMAX Maximum voltage gain VAGC = 3 V 51 dB GVIFMIN Minimum voltage gain VAGC = 0 V 46 dB GVRIF Gain control range VAGC = 0 V to 3 V 5 dB IM3IF Third order intermodulation distortion fIN1 = 43.5 MHz, fIN2 = 445 MHz, VIFOUT = 1 dBm, VAGC = 3 V -60 dBc VIFOUT IF amplifier output voltage VAGC = 3 V, Single-ended output 122 dBµV (1) (2) (3) Measurement Circuit 1 except for Noise Figure measurement. AGC IN = 80 MHz/-37 dBm, LO IN = 36 MHz / -20 dBm, IF = 44 MHz, unless otherwise noted. Measurement Circuit 2. Measurement Circuit 3. IF IN = 44 MHz / -50 dBm, unless otherwise noted. Submit Documentation Feedback 3 SN761688 DOWN CONVERTER www.ti.com SLES178 – APRIL 2006 APPLICATION INFORMATION MEASUREMENT CIRCUITS SG 50 50 0.1 F 1 AGC IN1 MIXOUT1 16 0.1 F 0.1 F 2 AGC IN2 MIXOUT2 15 0.1 F 3 VAGC 4 GND IF IN1 13 0.1 F 5 LO IN1 IF IN2 12 0.1 F 6 LO IN2 GND 11 0.1 F GND 14 50 50 Spectrum Analyzer SG 50 50 7 VCC1 IF OUT2 10 8 VCC2 IF OUT1 9 VCC 0.1 F VCC 0.1 F Figure 7. Measurement Circuit 1 NF Meter Noise Source 0.1 F 1 AGC IN1 MIXOUT1 16 0.1 F 0.1 F 2 AGC IN2 MIXOUT2 15 0.1 F 3 VAGC 4 GND IF IN1 13 0.1 F 5 LO IN1 IF IN2 12 0.1 F 6 LO IN2 GND 11 0.1 F GND 14 SG 50 50 7 VCC1 IF OUT2 10 8 VCC2 IF OUT1 9 VCC 0.1 F VCC 0.1 F Figure 8. Measurement Circuit 2 4 Submit Documentation Feedback 50 50 SN761688 DOWN CONVERTER www.ti.com SLES178 – APRIL 2006 APPLICATION INFORMATION (continued) 1 AGC IN1 MIXOUT1 16 2 AGC IN2 MIXOUT2 15 3 VAGC SG GND 14 50 0.1 F 4 GND IF IN1 13 5 LO IN1 IF IN2 12 6 LO IN2 GND 11 7 VCC1 IF OUT2 10 8 VCC2 IF OUT1 9 50 0.1 F Vout = Vmeas + 14 dB 0.1 F 200 VCC 0.1 F VCC 200 0.1 F 0.1 F Vmeas 50 50 Spectrum Analyzer Figure 9. Measurement Circuit 3 NOTE: This application information is advisory and a performance check is required at the actual application circuits. Texas Instruments assumes no responsibility for the consequences of use of these application circuits, such as infringement of intellectual property rights or other rights, including patents, of third parties. Submit Documentation Feedback 5 SN761688 DOWN CONVERTER www.ti.com SLES178 – APRIL 2006 TYPICAL CHARACTERISTICS Mixer Conversion Gain vs AGC Control Voltage Mixer Conversion Gain vs AGC Control Voltage 40 40 VCC = 5 V TA = 25C 30 30 20 VCC = 4.5 V 10 Gain [dB] Gain [dB] 20 TA = −20C 0 VCC = 5 V −10 10 TA = 25C 0 −10 TA = 85C VCC = 5.5 V −20 −20 −30 0.0 0.5 1.0 1.5 2.0 2.5 −30 3.0 0.0 0.5 1.0 AGC control voltage [V] 2.0 Figure 10. Figure 11. Mixer Output Level vs AGC IN lnput Level Mixer Output Level vs LO IN lnput Level 3.0 VCC = 5 V, VAGC = 3 V VCC = 5.5 V TA = 25C, VAGC = 3 V 110 110 VCC = 5 V VCC = 4.5 V 100 90 80 70 60 −80 −70 −60 −50 −40 −30 −20 −10 AGC IN Input Level [dBm] 0 10 20 MIXOUT Output Level [dBuV] 120 TA = −20C 100 90 TA = 25C 80 TA = 85C 70 60 −80 −70 −60 −50 −40 −30 −20 LO IN Input Level [dBm] Figure 12. 6 2.5 120 130 MIXOUT Output Level [dBuV] 1.5 AGC control voltage [V] Figure 13. Submit Documentation Feedback −10 0 10 20 SN761688 DOWN CONVERTER www.ti.com SLES178 – APRIL 2006 TYPICAL CHARACTERISTICS (continued) Mixer NF vs Gain Mixer IM3 (VAGC = 3 V) 40 40 VCC = 5 V, TA = 25C 30 NF [dB] VCC = 5 V, TA = 25C 20 MIXOUT Output Level [dBm] 35 25 20 15 10 5 43.5 MHz 0 −20 42.5 MHz −40 −60 −80 AGC IN = 79.5 MHz / 80.5 MHz, LO IN = 36 MHz −100 −120 0 10 20 30 40 50 −70 −50 −40 −30 −20 AGC IN Input Level [dBm] Figure 14. Figure 15. Mixer Frequency Response IF Amp Gain vs AGC Control Voltage −10 0 55 40 VCC = 5 V, TA = 25C 30 VCC = 5 V VCC = 4.5 V VCC = 5 V, TA = 25C 20 50 VAGC = 3 V 10 VCC = 5.5 V Gain [dB] MIXER GAIN [dB] −60 Gain [dB] 0 −10 45 VAGC = 0 V −20 −30 40 0 100 200 300 400 500 600 0.0 AGC IN Input Freq [MHz] 0.5 1.0 1.5 2.0 2.5 3.0 AGC control voltage [V] Figure 16. Figure 17. Submit Documentation Feedback 7 SN761688 DOWN CONVERTER www.ti.com SLES178 – APRIL 2006 TYPICAL CHARACTERISTICS (continued) IF Amp Gain vs AGC Control Voltage IF Amp IM3 (AGC = 3 V) 55 40 TA = −20C 20 IFOUT output level [dBm] VCC = 5 V Gain [dB] 50 TA = 25C TA = 85C 45 VCC = 5 V, TA = 25C 43.5 MHz 0 42.5 MHz −20 −40 −60 −80 IF IN = 43.5 MHz / 44.5 MHz −100 40 0.0 0.5 1.0 1.5 2.0 2.5 −80.0 3.0 −70.0 −60.0 −50.0 AGC control voltage [V] Figure 18. Figure 19. IF Amp NF vs Gain 12.0 VCC = 5 V, TA = 25C NF [dB] 11.0 10.0 9.0 8.0 40.0 45.0 50.0 55.0 IFAMP Gain [dB] Figure 20. 8 −40.0 IF IN input level [dBm] Submit Documentation Feedback 60.0 −30.0 −20.0 −10.0 SN761688 DOWN CONVERTER www.ti.com SLES178 – APRIL 2006 TYPICAL CHARACTERISTICS (continued) S-PARAMETER Figure 21. AGC IN Figure 22. IF IN Submit Documentation Feedback 9 SN761688 DOWN CONVERTER www.ti.com SLES178 – APRIL 2006 TYPICAL CHARACTERISTICS (continued) Figure 23. IF OUT 10 Submit Documentation Feedback PACKAGE OPTION ADDENDUM www.ti.com 22-May-2006 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty 90 TBD Lead/Ball Finish Call TI MSL Peak Temp (3) SN761688PW ACTIVE TSSOP PW 16 SN761688PWR ACTIVE TSSOP PW 16 2000 Green (RoHS & no Sb/Br) CU NIPDAU Call TI Level-1-260C-UNLIM SN761688PWRG4 ACTIVE TSSOP PW 16 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. Addendum-Page 1 MECHANICAL DATA MTSS001C – JANUARY 1995 – REVISED FEBRUARY 1999 PW (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE 14 PINS SHOWN 0,30 0,19 0,65 14 0,10 M 8 0,15 NOM 4,50 4,30 6,60 6,20 Gage Plane 0,25 1 7 0°– 8° A 0,75 0,50 Seating Plane 0,15 0,05 1,20 MAX PINS ** 0,10 8 14 16 20 24 28 A MAX 3,10 5,10 5,10 6,60 7,90 9,80 A MIN 2,90 4,90 4,90 6,40 7,70 9,60 DIM 4040064/F 01/97 NOTES: A. B. C. D. All linear dimensions are in millimeters. This drawing is subject to change without notice. Body dimensions do not include mold flash or protrusion not to exceed 0,15. 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