TL441A Texas instruments

TL441A

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TL441A

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Описание

This monolithic 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 to be typically 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 military weapons systems, broadband radar, and infrared reconnaissance systems. It serves for data compression and analog compensation. This logarithmic amplifier is used in log IF circuitry as well as video and log amplifiers. The TL441AM is characterized for operation over the full military temperature range of - 55°C to 125°C.

Excellent Dynamic Range
Wide Bandwidth
Built-In Temperature Compensation
Log Linearity (30 dB Sections)...1 dB Typ
Wide Input Voltage Range

Scale factor (V/decade)	0.008
Offset voltage (input amplifiers) (max) (mV)	70
Vs (±) (min) (V)	-6
Vs (±) (max) (V)	6
Iq (max) (mA)	23
Dynamic range (typ) (dB)	120
Full-scale output voltage (min) (±V)	5.45
Full-scale output voltage (max) (±V)	5.85
Operating temperature range (°C)	-55 to 125
Specified voltage (±V)	6
Rating	Military