February 1999 PBM 3960/1 Microstepping Controller/ Dual Digital-to-Analog Converter Description PBM 3960/1 is a dual 7-bit+sign, Digital-to-Analog Converter (DAC) especially developed to be used together with the PBL 3771/1, Precision Stepper Motor driver in micro-stepping applications.
The circuit has a set of input registers connected to an 8-bit data port for easy interfacing directly to a microprocessor.
Two registers are used to store the data for each seven-bit DAC, the eighth bit being a sign bit (sign/ magnitude coding).
A second set of registers are used for automatic fast/slow current decay control in conjunction with the PBL 3771/1, a feature that greatly improves high-speed micr...

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