PBM3960 Microstepping Controller / Dual Digital to Analog Converter common ic chips

PBM3960 Microstepping Controller/Dual Digital-to-Analog Converter common ic chips digital ic circuits

Key Features

• Analog control voltages from 3 V down to 0.0 V.

• High-speed microprocessor interface.

• Automatic fast/slow current decay control.

• Full-scale error ±1 LSB.

• Interfaces directly with TTL levels and CMOS devices.

• Fast conversion speed, 3 µs.

• Matches PBL 3771.

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 micro-stepping performance. The PBM 3960/1 is fabricated in a highspeed CMOS process.

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