Rainbow Electronics MAX5233 - Manual (Page 10)

MAX5232/MAX5233
3V/5V, 10-Bit, Serial Voltage-Output Dual DACs
with Internal Reference
10 ______________________________________________________________________________________
PIN NAME FUNCTION
1 OSA DAC A Offset Adjust
2 OUTA DAC A Output
3 RSTV
Reset Value Input
1: Connect to V
DD to select midscale as the reset value.
0: Connect to DGND to select zero as the reset value.
4 LDAC Load DACs A and B
5 CLR
Clear Input. Both DAC outputs go to zero or midscale. Clears both DAC internal registers (input
register and DAC register) to its predetermined (RSTV) state.
6 CS Chip-Select Input
7 DIN Serial Data Input. Data is clocked in on the rising edge of SCLK.
8 SCLK Serial Clock Input
9 DGND Digital Ground
10 DOUT Serial Data Output
11 PDL Power-Down Lockout. Disables shutdown of both DACs when low.
12 REF Reference Output. Reference provides a 2.465V (MAX5233) or 1.234V (MAX5232) nominal output.
13 AGND Analog Ground
14 V DD
Positive Power Supply. Bypass V DD with a 0.1µF capacitor in parallel with a 4.7µF capacitor to
AGND, and bypass V DD with a 0.1µF capacitor to DGND.
15 OUTB DAC B Output
16 OSB DAC B Offset Adjust
Pin Description
CS
SCLK
DIN
COMMAND EXECUTED
9 8 16 (1) 1
C1 C2 S0 C0 D9 D8 D7 D6 D3 D2 D1 D0 S2
(MODE 0)
(MODE 1)
DOUT
DOUT
C2 C1
C2 C1
S1 D5 D4
Figure 1. Serial Interface Timing