Datasheet

www.ti.com
DEVICE INFORMATION
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
GND
DB11(MSB)
DB10
DB9
DB8
DB7
DB6
DB5
DB0(LSB)
DB1
DB2
DB3
DB4
DAC7821
TSSOP-20
I 1
OUT
R
FB
V
REF
V
DD
I 2
OUT
R/W
CS
DAC7821
SBAS365B – OCTOBER 2005 – REVISED JULY 2007
TERMINAL FUNCTIONS
TERMINAL
TSSOP
NO. NAME DESCRIPTION
1 I
OUT
1 DAC current output.
2 I
OUT
2 DAC analog ground. This pin is normally tied to the analog ground of the system.
3 GND Ground pin.
4–15 DB11 – DB0 Parallel data bits 11 to 0.
Chip select input. Active low. Used in conjunction with R/ W to load parallel data to the input latch or
16 CS
read data from the DAC register. Rising edge of CS loads data.
Read/Write. When low, use in conjunction with CS to load parallel data. When high, use with CS to
17 R/ W
read back contents of DAC register.
18 V
DD
Positive power supply input. These parts can be operated from a supply of 2.5V to 5.5V.
19 V
REF
DAC reference voltage input.
DAC feedback resistor pin. Establish voltage output for the DAC by connecting to external amplifier
20 R
FB
output.
5
Submit Documentation Feedback