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Product Descriptions

The AD648 is a matched pair of low power, precision monolithic operational amplifiers. It offers both low bias current (10 pA max, warmed up) and low quiescent current (400 μA max) and is fabricated with ion-implanted FET and laser wafer trimming technologies. Input bias current is guaranteed over the AD648’s entire common-mode voltage range.

The economical J grade has a maximum guaranteed offset voltage of less than 2 mV and an offset voltage drift of less than 20 μV/°C. The C grade reduces offset voltage to less than 0.30 mV and offset voltage drift to less than 3 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 offset voltage due to self-heating effects. Five additional grades are offered over the commercial, industrial and military temperature ranges.

The AD648 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 AD648’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 AD648 is pinned out in a standard dual op amp configuration and is available in seven performance grades. The AD648J and AD648K are rated over the commercial temperature range of 0°C to +70°C. The AD648A, AD648B and AD648C are rated over the industrial temperature range of –40°C to +85°C.

Product Features

DC Performance 

400 mA max Quiescent Current 

10 pA max Bias Current, Warmed Up (AD648C) 

300 μV max Offset Voltage (AD648C) 

3 μV/8 C max Drift (AD648C) 

2 μV p-p Noise, 0.1 Hz to 10 Hz 

AC Performance 

1.8 V/m s Slew Rate 

1 MHz Unity Gain Bandwidth 

Available in Plastic Mini-DIP, Cerdip, Plastic SOIC and Hermetic Metal Can Packages 

MIL-STD-883B Parts Available 

Surface Mount (SOIC) Package Available in Tape and Reel in Accordance with EIA-481A Standard 

Single Version: AD548

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