MAX280EPA+

The MAX280EPA+ is a 5th-order, zero DC error, switched capacitor low pass filter in 8 pin DIP package. The MAX280 is a 5th order all pole instrumentation low pass filters with no DC error. The filter uses an external resistor and capacitor to isolate the integrated circuit from the DC signal path, thus providing excellent DC accuracy. The resistor and capacitor, along with on-chip 4th order switched capacitor filter form a 5th order low pass filter. Two MAX280 can be cascaded to form a 10th order low pass filter. The filter cut-off frequency is set by an internal clock which can be externally driven. The clock to cut-off frequency ratio is 100:1 allowing clock ripple to be easily removed. Typical applications include anti-aliasing filter, data loggers, digital voltmeters, weigh scales and strain gauges.

• Operating supply voltage range from 4.75V to 16V (single supply), ±2.375 to ±8V (dual supply)
• Operating temperature range from -40°C to 85°C
• Low pass filter with no DC error
• Low pass band noise, internal or external clock
• DC to 20KHz cut-off frequency
• 100 ± 1 clock to cut-off frequency ratio
• Cascadable for higher order roll off
• Power supply current of 5mA at TA = 25°C
• Internal oscillator frequency is 35KHz at Cosc = 100PF
• Maximum clock frequency of 4KHz, offset voltage is 0.2mV

Applications

Signal Processing

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party