MAX296EWE+

Overview

The MAX296EWE+ is an 8th-order, lowpass, switched-capacitor Bessel filter manufactured by Analog Devices Inc./Maxim Integrated. It operates within a corner frequency range of 0.1Hz to 50kHz and features a clock-to-corner-frequency ratio of 50:1. The device supports single +5V or dual ±5V supplies, with supply voltage ranges from +4.75V to +11.0V (single) or +2.375V to +5.500V (dual). It includes an internal oscillator controlled by an external capacitor, an uncommitted operational amplifier, and operates in the -40°C to +85°C temperature range. Packaged in a 16-pin Wide SOIC.

Feature Summary

• Bessel filter response providing low overshoot and fast settling times for multiplexer applications
• Integrated uncommitted operational amplifier for post-filtering or anti-aliasing stages
• Clock-tunable corner frequency utilizing either internal oscillator or external clock signal

Applications

• ADC Anti-Aliasing Filter
• DAC Post-Filtering
• Noise Analysis
• 50Hz/60Hz Line-Noise Filtering

Procurement Notes

Verify the specific suffix 'EWE+' against the manufacturer's current ordering guide to confirm package type and RoHS compliance status. Confirm that the 16-pin Wide SO package matches the target PCB footprint. Ensure the operating temperature range meets system requirements.

Selection Notes

Select the MAX296EWE+ when a Bessel response is required for minimal phase distortion and fast settling. Choose this part over the MAX295 series if the maximum corner frequency requirement does not exceed 50kHz. Verify that the available clock frequency allows for the desired 50:1 tuning ratio.

Part Context

This component belongs to the MAX291/MAX292/MAX295/MAX296 family of 8th-order lowpass switched-capacitor filters. The MAX296 variant specifically implements a Bessel transfer function, distinguishing it from the Butterworth response found in the MAX291 and MAX295 models within the same product line.

Replacement Considerations

MAX296CWE+

FAQ

How is the corner frequency determined?

The corner frequency is set by the clock frequency applied to the CLK pin, maintaining a fixed 50:1 ratio between the clock frequency and the corner frequency.

What is the purpose of the uncommitted op amp?

The uncommitted op amp can be configured as a continuous-time lowpass filter for anti-aliasing or clock-noise filtering at the output.

Can the device operate with a single supply?

Yes, the device operates with a single +5V supply or dual ±5V supplies, provided the GND pin is biased correctly for single-supply operation.