PBM3961

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 PBM3961 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 PBM3961 are used for automatic fast/slow current decay control in conjunction with the PBL 3771/1, a feature that greatly improves high-speed micro-stepping performance. The PBM 3960/1 is fabricated in a highspeed CMOS process.