MAMM-124B

The MAMM-124B-1 is a 24-channel, analog multiplexer designed for use in Curtiss-Wright's miniature series of Distributed Data Acquisition products (Miniature Programmable Data Acquisition Unit - MPDAU-2000). It can be configured with up to 24 single-ended, high-level input channels, up to 12 high-level differential input channels, or with any combination of single-ended and differential inputs that are required (i.e. 12 single-ended input channels and 6 differential input channels). The module can accept voltages from various system sources including sensors, transducers, batteries, and other pre-conditioned analog voltages. 

A 4x attenuator may be selected on a per-channel basis that allows measurement of input voltages up to ±40VDC. Each channel has a 3-pole analog low-pass Butterworth characteristic filter with -3 dB frequency at 4 KHz as well as a programmable moving average digital filter (MAV). MAV Filter options are: Last 1 sample (no MAV filter), last 2, 4, 8, 16, 32, 64 or 128 samples.

One of two modes of output sampling may be selected on a module-wide basis. Time Correlation or format-based mode samples channels as and when they appear in the PCM format. CVT mode employs a Current Value Table where channels are sampled in sequence, one channel every 10 µs. The most recent sample of any channel is then sent to the format as required. Data is output to the PCM format at up to 16-bit resolution with an overall accuracy of better than ±0.25% of the channel’s full-scale range over the module’s operating temperature range.