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PBM39601QNS Datasheet(PDF) 1 Page - Ericsson |
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PBM39601QNS Datasheet(HTML) 1 Page - Ericsson |
1 / 10 page 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 high- speed CMOS process. 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. PBM 3960/1 Microstepping Controller/ Dual Digital-to-Analog Converter February 1999 Figure 1. Block Diagram. 22-pin plastic DIP 28-pin plastic PLCC VDD VRef CS A0 A1 WR D7 - D0 RESET V ss Sign 2 CD2 DA 2 Sign 1 CD 1 DA 1 E C D R E C D E C D R R E C D R Digit Comp Digit Comp E C D R E C D R D / A D / A E1 E2 E3 E4 POR E1 E4 PBM 3960/1 DA- Data 1 DA- Data 2 Level 1 Level 2 R |
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