Rainbow-electronics MAX5144 Manual do Utilizador descarregar pdf (Página 6)

MAX5141–MAX5144

+3V/+5V, Serial-Input,

Voltage-Output, 14-Bit DACs

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Pin Descriptions

MAX5141

MAX5143

MAX5142

MAX5144

NAME FUNCTION

1 1 REF Voltage Reference Input

22CS Chip-Select Input

3 3 SCLK Serial Clock Input. Duty cycle must be between 40% and 60%.

4 4 DIN Serial Data Input

55CLR

Clear Input. Logic low asynchronously clears the DAC to code 0

(MAX5141/MAX5143) or code 8192 (MAX5142/MAX5144).

6 6 OUT DAC Output Voltage

— 7 INV

Junction of Internal Scaling Resistors. Connect to external op amp’s inverting input in

bipolar mode.

— 8 RFB Feedback Resistor. Connect to external op amp’s output in bipolar mode.

79V

Supply Voltage. Use +3V for MAX5143/MAX5144 and +5V for MAX5141/MAX5142.

8 10 GND Ground

CSHO

CSSO

CSH1

CSS1

LDACS

SCLK

DIN

D13 D12

Figure 1. Timing Diagram

1 2 3 4 5 6 7 8 9 10 11 12

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