SN761666 AGC AMPLIFIER www.ti.com SLES183 – JUNE 2006 FEATURES • • • Low-Distortion Automatic Gain Control (AGC) Amplifier 5-V Power Supply 8-Pin Mini Small-Outline Package (MSOP) APPLICATIONS • • • Digital TVs Digital CATVs Digital Set-Top Boxes (STBs) DGK PACKAGE (TOP VIEW) VCC 1 8 GND1 IN1 2 7 OUT1 IN2 3 6 OUT2 AGC 4 5 GND2 AGC Control P0026-03 DESCRIPTION The SN761666 is an automatic gain control (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. 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 SN761666 AGC AMPLIFIER www.ti.com SLES183 – JUNE 2006 TERMINAL FUNCTIONS TERMINAL NAME NO. I/O EQUIVALENT CIRCUIT DESCRIPTION 4 kΩ 4 AGC 4 I Gain-control voltage 100 kΩ S0118-01 GND1 GND2 8 5 – Ground Vbias 1 kΩ 1 kΩ 2 IN1 IN2 2 3 3 I AGC amplifier input S0117-01 OUT1 OUT2 7 6 O 15 Ω AGC amplifier output 6 7 S0119-01 VCC 2 1 – 5-V power supply Submit Documentation Feedback SN761666 AGC AMPLIFIER www.ti.com SLES183 – JUNE 2006 Absolute Maximum Ratings (1) over operating free-air temperature range (unless otherwise noted) MIN MAX VCC Supply voltage range (2) VCC (pin 1) –0.4 6.5 V VI Input voltage range (2) AGC (pin 4) –0.4 VCC + 0.4 V Continuous total TJC (1) (2) (3) dissipation (3) Maximum junction temperature UNIT 477 mW 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 MIN VCC Supply voltage 4.5 TOPE Operating free-air temperature –20 NOM MAX 5 UNIT 5.5 V 85 °C DC Electrical Characteristics VCC = 5 V, TA = 25°C (unless otherwise noted) PARAMETER TEST CONDITIONS ICC Supply current IIAGC Input current (AGC) VAGC = 3 V VAGCMAX AGC maximum gain control voltage Maximum gain VAGCMIN AGC minimum gain control voltage Minimum gain MIN TYP MAX 32 UNIT mA 60 µA 2.5 VCC V 0 0.4 V 30 AC Electrical Characteristics VCC = 5 V, TA = 25°C, parameters measured in test circuit (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT GMAX Maximum gain VAGC = 3 V 49 53 57 dB GMIN Minimum gain VAGC = 0 V –5 –2 –1 dB GCR Gain control range VAGC = 0 V–3 V 55 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) Submit Documentation Feedback 7 dB –50 dBc 11 dBm 1 kΩ 3 SN761666 AGC AMPLIFIER www.ti.com SLES183 – JUNE 2006 TYPICAL CHARACTERISTICS 30 60 50 25 VCC = 4.5 V 20 30 NF − dB Gain − dB 40 VCC = 5 V 20 15 VCC = 5.5 V 10 10 0 −10 5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 10 20 30 AGC Control Voltage − V Figure 1. Gain vs VAGC (TA = 25°C) 30 20 40 60 Figure 2. Noise Figure vs Gain (VCC = 5 V, TA = 25°C) 60 VCC = 5.5 V VCC = 5 V VCC = 4.5 V 50 Gain − dB VCC = 5.5 V VAGC = 2 V 50 10 VCC = 4.5 V VCC = 5 V VAGC = 1.3 V −10 −20 40 VCC = 5.5 V VCC = 5 V VCC = 4.5 V Gain − dB Output Level − dBm 0 VAGC = 0 V −30 VCC = 5.5 V VCC = 5 V VCC = 4.5 V −40 −50 30 20 −60 10 −70 −80 −60 −50 −40 −30 −20 −10 0 Input Level − dBm Figure 3. Output Level vs Input Level (TA = 25°C) 4 10 0 10 Frequency − MHz 100 Figure 4. Gain vs Frequency (Gain = Max, TA = 25°C) Submit Documentation Feedback SN761666 AGC AMPLIFIER www.ti.com SLES183 – JUNE 2006 TYPICAL CHARACTERISTICS (continued) 10 10 43.5 MHz (–2 dBm) 0 0 −10 −20 −30 42.5 MHz −40 −50 43.5 MHz −30 Output Level − MHz −20 −40 −50 −60 42.5 MHz −70 −80 −60 −90 −70 −100 −80 0 10 20 30 40 50 60 −110 −40 −30 Gain − dB Figure 5. IM3 vs Gain (VCC = 5 V, TA = 25°C) −20 −10 Input Level − dBm 0 10 Figure 6. IM3 (Gain = Min, VCC = 5 V, TA = 25°C) 20 10 43.5 MHz 0 −10 Output Level − MHz Output Level − dBm −10 −20 42.5 MHz −30 −40 −50 −60 −70 −80 −90 −100 −70 −60 −50 −40 −30 Input Level − dBm Figure 7. IM3 (Gain = Max, VCC = 5 V, TA = 25°C) Submit Documentation Feedback 5 SN761666 AGC AMPLIFIER www.ti.com SLES183 – JUNE 2006 APPLICATION INFORMATION Test Circuits Figure 8 and Figure 9 are test circuits for the SN761666. Figure 8 is the circuit for measurement of gain and output voltage. Figure 9 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 8. 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 9. Measurement Circuit for IM3 and IIP3 6 Submit Documentation Feedback PACKAGE OPTION ADDENDUM www.ti.com 5-Dec-2006 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty SN761666DGKR ACTIVE MSOP DGK 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN761666DGKRG4 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), 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. 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