The AD548 is a low power, precision monolithic operational amplifier. It offers both low bias current (10 pA max, warmed up) and low quiescent current (200 µA max) and is fabricated with ion-implanted FET and laser wafer trimming technologies. Input bias current is guaranteed over the AD548's entire common-mode voltage range.
The economical J grade has a maximum guaranteed input offset voltage of less than 2 mV and an input offset voltage drift of less than 20µV/°C. The C grade reduces input offset voltage to less than 0.25 mV and offset voltage drift to less than 2 µV/°C. This level of dc precision is achieved utilizing Analog's laser wafer drift trimming process. The combination of low quiescent current and low offset voltage drift minimizes changes in input off-set voltage due to self-heating effects. Four additional grades are offered over the commercial, industrial and military temperature ranges.
The AD548 is recommended for any dual supply op amp application requiring low power and excellent dc and ac performance. In applications such as battery-powered, precision instrument front ends and CMOS DAC buffers, the AD548's excellent combination of low input offset voltage and drift, low bias current and low 1/f noise reduces output errors. High common-mode rejection (86 dB, min on the "C" grade) and high open-loop gain ensures better than 12-bit linearity in high impedance, buffer applications.
The AD548 is pinned out in a standard op amp configuration and is available in six performance grades. The AD548J and AD548K are rated over the commercial temperature range of 0°C to +70°C. The AD548A, AD548B and AD548C are rated over the industrial temperature range of -40°C to +85°C. The AD548S is rated over the military temperature range of -55°C to +125°C and is available processed to MIL-STD-883B, Rev. C.
The AD548 is available in an 8-pin plastic mini-DIP, cerdip, TO-99 metal can, surface mount (SOIC), or in chip form.
|Title||Content Type||File Type|
|AD548: Precision, Low Power BiFET Op Amp Data Sheet (Rev D, 06/2002) (pdf, 215 kB)||Data Sheets|
|AN-649: Using the Analog Devices Active Filter Design Tool (pdf, 5301 kB)||Application Notes|
|AN-253: Find Op Amp Noise with Spreadsheet (pdf, 77 kB)||Application Notes|
|RAQs index||Rarely Asked Questions||HTML|
|Glossary of EE Terms||Glossary||HTML|
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