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TL441-EP Datasheet(PDF) 1 Page - Texas Instruments |
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TL441-EP Datasheet(HTML) 1 Page - Texas Instruments |
1 / 18 page TL441EP LOGARITHMIC AMPLIFIER SGLS268 − OCTOBER 2004 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Controlled Baseline − One Assembly/Test Site, One Fabrication Site D Extended Temperature Performance of −55 °C to 125°C D Enhanced Diminishing Manufacturing Sources (DMS) Support D Enhanced Product-Change Notification D Qualification Pedigree† D Excellent Dynamic Range D Wide Bandwidth D Built-In Temperature Compensation D Log Linearity (30-dB Sections) ...1 dB Typ D Wide Input Voltage Range † Component qualification in accordance with JEDEC and industry standards to ensure reliable operation over an extended temperature range. This includes, but is not limited to, Highly Accelerated Stress Test (HAST) or biased 85/85, temperature cycle, autoclave or unbiased HAST, electromigration, bond intermetallic life, and mold compound life. Such qualification testing should not be viewed as justifying use of this component beyond specified performance and environmental limits. DESCRIPTION This amplifier circuit contains four 30-dB logarithmic stages. Gain in each stage is such that the output of each stage is proportional to the logarithm of the input voltage over the 30-dB input voltage range. Each half of the circuit contains two of these 30-dB stages summed together in one differential output that is proportional to the sum of the logarithms of the input voltages of the two stages. The four stages may be interconnected to obtain a theoretical input voltage range of 120-dB. In practice, this permits the input voltage range typically to be greater than 80-dB with log linearity of ±0.5-dB (see application data). Bandwidth is from dc to 40 MHz. This circuit is useful in data compression and analog compensation. This logarithmic amplifier is used in log IF circuitry as well as video and log amplifiers. The TL441M is characterized for operation over the full military temperature range of −55 °C to 125°C. ORDERING INFORMATION TA PACKAGE† ORDERABLE PART NUMBER TOP-SIDE MARKING −55 °C to 125°C SOP (NS) Tape and reel TL441MNSREP TL441MEP † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. Copyright 2004, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 CA2 VCC − CA2′ A1 Y Y A2 VCC + NC CB2 CB2′ GND B1 Z Z B2 NS PACKAGE (TOP VIEW) NC — No internal connection 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. |
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