MAX5547
Dual, 10-Bit, Current-Sink Output DAC
10 ______________________________________________________________________________________
CONTROL BITS
MSB
DATA BITS LSB REGISTER FUNCTION
C3 C2 C1 C0 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 S1 S0
0000XXXXXXXXXX00
External reference mode (default
state). Connect an external voltage
source at REF from +2.45V to
+2.55V.
1000XXXXXXXXXX00
Internal reference mode. Internal
reference is +2.5V.
0 0 1 0 10-bit data 0 0
Load DAC register A and set I
OUTA
full-scale range to 1.2mA.
0 0 1 1 10-bit data 0 0
Load DAC register A and set I
OUTA
full-scale range to 3.6mA.
0 1 0 0 10-bit data 0 0
Load DAC register B and set I
OUTB
full-scale range to 1.2mA.
0 1 0 1 10-bit data 0 0
Load DAC register B and set I
OUTB
full-scale range to 3.6mA.
0 1 1 0 10-bit data 0 0
Load DAC registers A and B and
set I
OUTA
and I
OUTB
full-scale
ranges to 1.2mA (default state).
0 1 1 1 10-bit data 0 0
Load DAC registers A and B and
set I
OUTA
and I
OUTB
ranges to
3.6mA.
Table 1. Command Word Summary
X = Don’t care. Unused codes are reserved for factory use.
BINARY DAC CODE I
OUT
_
11 1111 1111
10 0000 0000
00 0000 0001
00 0000 0000 0
Table 2. Ideal DAC Output Code Table
1023
1023
×
I
FS
512
1023
×
I
FS
1023
I
FS
REF
GND
DIN
1
+
2
OUTA
OUTB
CS
SCLK
V
DD
TDFN
TOP VIEW
3
4
MAX5547
8
76
5
