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SMART I/O User’s Manual

Chapter 5 Analog Modules

5.5 SM-DAC1

5.5.1 Introduction

The SM-DAC1 provides a fast, 12-bit, bipolar (± 10V DC), 2/6-channel

digital to analog converter. Two configurable red LEDs on the front panel

form the user interface while an on-board EEPROM stores unique calibra-

tion data required by the signal converter.

A version of the SM-DAC1 for current output (0 .. 20mA) is also available.

5.5.2 Specifications

† The conversion time applies per channel for a full scale voltage swing of

(-10V .. +10V)

Isolation 1.0 kV Optoisolated from the system

Output

2/6 Outputs

Output Range ± 10V DC (0 .. 20mA)

12-bit DAC with 1-bit non-linearity

11-bit Repeating Accuracy

Glitch-Free Power-On-Reset

2mA (max.) output current (voltage version)

75µs Conversion Time @ 1MHz SCLK †

Ext. Vcc 24V DC (-10% .. +20%)

EEPROM 256 Byte serial EEPROM for Calibration Data

Front Panel 2 Red LEDs (User Configurable)

Power Cons. 660mW (max. voltage version)

400mW (max. current version)

Temperature Range Standard (0°C to +70°C), Ext./Storage (-40°C to +85°C)

Module Weight 70g

ID Byte $40, read by the SPI Interface

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Pepper-computer Modular Computers RS485 Bedienungsanleitung Seite 263