
11
LTC1599
sn1599 1599fs
APPLICATIONS INFORMATION
WU
U
VCC
LTC1599
RFB
ROFS
5V
4
3
20
8
19
R1
RCOM
2
R2
1
REF
5
6
0.1F
7
IOUT1
33pF
VOUT
0V TO –VREF
1599 F01
DGND
VREF
–
+
LT1001
16-BIT DAC
R1
R2
Unipolar Binary Code Table
DIGITAL INPUT
BINARY NUMBER
IN DAC REGISTER
–VREF (65,535/65,536)
–VREF (32,768/65,536) = –VREF/2
–VREF (1/65,536)
0V
LSB
1111 1111 1111
0000 0000 0000
0000 0000 0001
0000 0000 0000
ANALOG OUTPUT
VOUT
MSB
1111
1000
0000
IOUT2F
9
IOUT2S
13
MLBYTE
14 TO 18,
21 TO 23
8
DATA
INPUTS
LD
12
11
24
10
WR
CLR
CLVL
CLR
CLVL
3
6
2
1599 F02
VCC
LTC1599
RFB
ROFS
5V
43
20
8
19
R1
RCOM
2
R2
1
REF
5
6
0.1F
7
IOUT1
33pF
VOUT
0V TO VREF
IOUT2F
9
IOUT2S
DGND
–
+
1/2 LT1112
14 TO 18,
21 TO 23
13
MLBYTE
VREF
–
+
1/2 LT1112
16-BIT DAC
R1
R2
8
DATA
INPUTS
LD
12
11
24
10
WR
CLR
CLVL
CLR
CLVL
Unipolar Binary Code Table
DIGITAL INPUT
BINARY NUMBER
IN DAC REGISTER
VREF (65,535/65,536)
VREF (32,768/65,536) = VREF/2
VREF (1/65,536)
0V
LSB
1111 1111 1111
0000 0000 0000
0000 0000 0001
0000 0000 0000
ANALOG OUTPUT
VOUT
MSB
1111
1000
0000
3
1
2
6
7
5
Figure 2. Noninverting Unipolar Operation (2-Quadrant Multiplication) VOUT = 0V to VREF
Figure 1. Unipolar Operation (2-Quadrant Multiplication) VOUT = 0V to – VREF