register offers a readback capability. The converter can be
powered from a single +5V supply or a dual ±5V supply.
The device offers a reset function which immediately sets
the DAC output voltage and DAC register to mid-scale
(code 800H) or to zero-scale (code 000H), depending on the
status of the reset selection. See Figures 1 and 2 for the basic
operation of the DAC7613.
THEORY OF OPERATION
The DAC7613 is a 12-bit, voltage output Digital-to-Analog
Converter (DAC). The architecture is a classic R-2R ladder
configuration followed by an operational amplifier that serves
as a buffer. The minimum voltage output (“zero-scale”) and
maximum voltage output (“full-scale”) are set by the exter-
nal voltage references (VREFL and VREFH, respectively). The
digital input is a 12-bit parallel word and the DAC input
DAC7613E
1
2
3
4
5
6
7
8
9
DB11
DB10
DB9
DB8
DB7
DB6
DB5
DB4
DB3
R/W 24
CS 23
Read/Write
Chip Select
RESETSEL 22
RESET 21
LOADDAC 20
VOUT 19
Reset Select
Reset DAC
Load DAC Register
0V to +2.5V
Data Bus
VDD 18
+5V
+
0.1µF
1µF
GND 17
VSS 16
+2.5V
10 DB2
11 DB1
12 DB0
VREFH 15
NIC 14
0.1µF
VREFL 13
FIGURE 1. Basic Single-Supply Operation of the DAC7613.
DAC7613E
1
2
3
4
5
6
7
8
9
DB11
DB10
DB9
DB8
DB7
DB6
DB5
DB4
DB3
R/W 24
CS 23
Read/Write
Chip Select
Reset Select
Reset DAC
RESETSEL 22
RESET 21
LOADDAC 20
VOUT 19
Load DAC Register
–2.5V to +2.5V
Data Bus
VDD 18
+5V
+
0.1µF
1µF
1µF
GND 17
–5V
VSS 16
+
0.1µF
0.1µF
0.1µF
10 DB2
11 DB1
12 DB0
VREFH 15
NIC 14
+2.5V
–2.5V
VREFL 13
FIGURE 2. Basic Dual-Supply Operation of the DAC7613.
®
7
DAC7613
TI [ TEXAS INSTRUMENTS ]
