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PBM39601QNS Datasheet(PDF) 1 Page - Ericsson

Part # PBM39601QNS
Description  Microstepping Controller/Dual Digital-to-Analog Converter
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Manufacturer  ERICSSON [Ericsson]
Direct Link  http://www.ericsson.com
Logo ERICSSON - Ericsson

PBM39601QNS Datasheet(HTML) 1 Page - Ericsson

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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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