SN761663 www.ti.com SLES151 – OCTOBER 2005 AGC Amplifier FEATURES • • • • Low-Distortion AGC Amplifier Wide Gain-Control Range 5-V Power Supply 8-Pin MSOP Package APPLICATIONS • • Digital TV Digital CATV, STB DESCRIPTION DGK PACKAGE (TOP VIEW) VCC 1 8 GND1 IN1 2 7 OUT1 IN2 3 6 OUT2 AGC 4 5 GND2 AGC Control P0026-03 The SN761663 is an AGC amplifier for the TV tuner system of a digital TV, CATV, or STB. The circuit consists of three stages of controlled-gain amplification, followed by a fixed-gain output amplifier. The device is packaged in an 8-pin MSOP suitable for surface mounting. 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 © 2005, Texas Instruments Incorporated SN761663 www.ti.com SLES151 – OCTOBER 2005 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. ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range (unless otherwise noted) (1) SN761663 Supply voltage, VCC (pin 1) (2) –0.4 V to 6.5 V Input voltage (2), AGC (pin 4), IN1 (pin 2), IN2 (pin 3) –0.4 V to VCC Continuous total dissipation 477 mW Operating free-air temperature, TA –20°C to 85°C Junction temperature, TJ (1) (2) (3) (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. At TA≤ 25°C. For TA > 25°C, the derating factor is 3.82 mW/°C. RECOMMENDED OPERATING CONDITIONS over operating free-air temperature range MIN NOM MAX 5 5.5 V 85 °C VCC Supply voltage 4.5 TA Operating free-air temperature –20 UNIT DC ELECTRICAL CHARACTERISTICS VCC = 5 V, TA = 25°C PARAMETER TEST CONDITIONS MIN TYP MAX 23 UNIT ICC Supply current IIAGC Input current (AGC) VAGC = 3 V 60 µA VAGCMAX AGC maximum gain control voltage Maximum gain 3 VCC V VAGCMIN AGC minimum gain control voltage Minimum gain 0 1 V 30 mA AC ELECTRICAL CHARACTERISTICS VCC = 5 V, TA = 25°C. Parameters measured in test circuit of Figure 9 or Figure 10. MIN TYP MAX GMAX Maximum gain PARAMETER VAGC = 3 V 56 60 64 dB GMIN Minimum gain VAGC = 0 V –10 –7 –4 dB GCR Gain control range VAGC = 0 V–3 V 67 dB VOUT Output voltage Single-ended output 2.6 Vp-p NF Noise figure Maximum gain IM3 Third-order intermodulation distortion fIN1 = 43 MHz, fIN2 = 44 MHz, VOUT = –2 dBm, maximum gain IIP3 Input intercept point Minimum gain RIN Input resistance (IN1, IN2) 2 TEST CONDITIONS UNIT 10 dB –50 dBc 11 dBm 1 kΩ SN761663 www.ti.com SLES151 – OCTOBER 2005 DEVICE INFORMATION DGK PACKAGE (TOP VIEW) VCC IN1 IN2 AGC 1 8 2 7 3 6 4 5 GND1 OUT1 OUT2 GND2 P0026-02 TERMINAL FUNCTIONS TERMINAL NAME NO. I/O EQUIVALENT CIRCUIT DESCRIPTION 4 kΩ 4 AGC 4 I Gain-control voltage 100 kΩ S0118-01 GND1 8 – Ground GND2 5 – Ground IN1 2 I IN2 3 I Vbias AGC amplifier input 1 kΩ 1 kΩ 2 AGC amplifier input 3 S0117-01 OUT1 7 O AGC amplifier output OUT2 6 O AGC amplifier output 15 Ω 6 7 S0119-01 VCC 1 – 5-V power supply 3 SN761663 www.ti.com SLES151 – OCTOBER 2005 TYPICAL CHARACTERISTICS GAIN vs VAGC NOISE FIGURE vs GAIN 70 30 TA = 25°C TA = 25°C 60 VCC = 5.5 V 25 Gain − dB 40 30 Noise Figure − dB 50 VCC = 4.5 V VCC = 5 V 20 10 VCC = 5.5 V 20 VCC = 5 V 15 VCC = 4.5 V 10 0 −10 0.5 5 1.0 1.5 2.0 2.5 3.0 3.5 10 20 30 AGC Control Voltage − V 40 50 60 Gain − dB G001 G002 Figure 1. Figure 2. OUTPUT LEVEL vs INPUT LEVEL GAIN vs FREQUENCY 70 20 VCC= 5.5 V 10 60 VAGC = 3 V 0 VCC = 5.5 V −10 VAGC = 1.8 V 50 VCC = 5.5 V VCC= 4.5 V VCC= 5 V VCC = 5 V −20 VCC = 4.5 V Gain − dB Output Level − dBm 70 VCC = 5 V VAGC = 0 V −30 VCC = 4.5 V VCC = 5.5 V −40 40 30 VCC = 5 V −50 20 VCC = 4.5 V −60 10 Gain = Max TA = 25°C −70 TA = 25°C −80 −80 −60 −40 −20 0 10 0 100 f − Frequency − MHz Input Level − dBm G004 G003 Figure 3. 4 Figure 4. SN761663 www.ti.com SLES151 – OCTOBER 2005 TYPICAL CHARACTERISTICS (continued) IM3 vs GAIN IM3 (GAIN = MIN) 10 10 0 0 −10 43 MHz (−2 dBm) −20 Output Level − dBm Output Level − dBm −10 −30 −40 42 MHz −50 −60 −20 Gain = Min VAGC = 0 V VCC = 5 V TA = 25°C 43/44 MHz −30 −40 −50 42 MHz −60 −70 VCC = 5 V TA = 25°C −70 −80 −80 0 10 20 30 40 50 −90 −30 60 −20 Gain − dB −10 0 Input Level − dBm G005 G006 Figure 5. Figure 6. IM3 (GAIN = MID) IM3 (GAIN = MAX) 20 10 10 Gain = Mid VAGC = 1.8 V VCC = 5 V TA = 25°C 0 −10 −10 Output Level − dBm Output Level − dBm 0 43/44 MHz −20 −30 −40 42 MHz −50 −20 −40 −50 42 MHz −60 −70 −70 −80 −40 −30 −20 −10 Input Level − dBm 43/44 MHz −30 −60 −80 −50 10 −90 −80 Gain = Max VAGC = 3 V VCC = 5 V TA = 25°C −70 −60 G007 Figure 7. −50 −40 Input Level − dBm G008 Figure 8. 5 SN761663 www.ti.com SLES151 – OCTOBER 2005 APPLICATION INFORMATION TEST CIRCUITS Figure 9 and Figure 10 are test circuits for the SN761663. Figure 9 is the circuit for measurement of gain and output voltage. Figure 10 is the circuit for measurement of intermodulation distortion and input intercept point. This application information is advisory, and a performance check is required for actual application circuits. VCC Spectrum Analyzer (50 Ω) 47 µF 0.1 µF SG (50 Ω) 0.1 µF 0.1 µF 51 Ω 1 VCC GND1 8 2 IN1 OUT1 7 3 IN2 OUT2 6 4 AGC GND2 5 0.1 µF 200 Ω 0.1 µF 200 Ω 51 Ω 0.1 µF S0120-01 Figure 9. Measurement Circuit for Gain and Output Voltage SG1 (50 Ω) VCC Spectrum Analyzer (50 Ω) 47 µF 0.1 µF 0.1 µF + 51 Ω SG2 (50 Ω) 0.1 µF 1 VCC GND1 8 2 IN1 OUT1 7 3 IN2 OUT2 6 4 AGC GND2 5 0.1 µF 200 Ω 0.1 µF 200 Ω 51 Ω 0.1 µF S0121-01 Figure 10. Measurement Circuit for IM3 and IIP3 6 PACKAGE OPTION ADDENDUM www.ti.com 17-Nov-2005 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty SN761663DGK ACTIVE MSOP DGK 8 100 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN761663DGKG4 ACTIVE MSOP DGK 8 100 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN761663DGKR ACTIVE MSOP DGK 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN761663DGKRG4 ACTIVE MSOP DGK 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Lead/Ball Finish MSL Peak Temp (3) (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) 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. 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. 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