Rainbow Electronics MAX5144 - Manual (Page 6)

MAX5141–MAX5144
+3V/+5V, Serial-Input,
Voltage-Output, 14-Bit DACs
6 _______________________________________________________________________________________
Pin Descriptions
PIN
MAX5141
MAX5143 MAX5142
MAX5144 NAME FUNCTION
1 1 REF Voltage Reference Input
2 2 CS Chip-Select Input
3 3 SCLK Serial Clock Input. Duty cycle must be between 40% and 60%.
4 4 DIN Serial Data Input
5 5 CLR
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.
7 9 V DD Supply Voltage. Use +3V for MAX5143/MAX5144 and +5V for MAX5141/MAX5142.
8 10 GND Ground
;; ;; ;;;;;;;;; ;; ;;
t CSHO
t CH t CSSO t CL
t DH
t
DS
t CSH1
t CSS1
t LDACS
CS
SCLK
DIN
D13 D12 S0
Figure 1. Timing Diagram