Datasheet
Table Of Contents
- FEATURES
- APPLICATIONS
- DESCRIPTION
- ABSOLUTE MAXIMUM RATINGS
- THERMAL INFORMATION
- ELECTRICAL CHARACTERISTICS
- PIN CONFIGURATIONS
- TIMING DIAGRAM
- TIMING REQUIREMENTS
- TYPICAL CHARACTERISTICS: DAC at AVDD = 5.5 V
- TYPICAL CHARACTERISTICS: DAC AT AVDD = 3.6 V
- TYPICAL CHARACTERISTICS: DAC AT AVDD = 2.7 V
- THEORY OF OPERATION
- DIGITAL-TO-ANALOG CONVERTER (DAC)
- RESISTOR STRING
- OUTPUT AMPLIFIER
- TWO-WIRE, I2C-COMPATIBLE INTERFACE
- DACx578 I2C UPDATE SEQUENCE
- POWER-ON RESET TO ZERO-SCALE OR MIDSCALE
- LDAC FUNCTIONALITY
- POWER-DOWN COMMANDS
- CLEAR CODE REGISTER AND CLR PIN
- SOFTWARE RESET FUNCTION
- OPERATING EXAMPLES: DAC7578
- Example 1: Write Mid Scale to Data Buffer A and Update Channel A Output
- Example 2: Power-Down Channel B, C, and H with Hi-Z Output
- Example 3: Read-back the value of the input register of DAC Channel G
- Example 4: Write multiple bytes of data to Channel F. Write Full Scale and then Quarter Scale to Channel F
- Example 5: Write Mid Scale and then Full Scale to all DAC channels.
- APPLICATION INFORMATION
- PARAMETER DEFINITIONS
- Revision History
Pull-Up Resistors
1k to 10k (typ)W W
Microcontroller or
Microprocessor
with I C Port
2
VDD
5
6
7
8
12
11
10
9
V D
OUT
V F
OUT
V H
OUT
CLR
V C
OUT
V E
OUT
V G
OUT
V
REFIN
DACx578
Top
View
1
2
3
4
16
15
14
13
SCL
SDA
GND
V B
OUT
LDAC
ADDR0
AV
DD
V A
OUT
SCL
SDA
VDD
5
6
7
8
12
11
10
9
V D
OUT
V F
OUT
V H
OUT
CLR
V C
OUT
V E
OUT
V G
OUT
V
REFIN
DACx578
Top
View
1
2
3
4
16
15
14
13
SCL
SDA
GND
V B
OUT
LDAC
ADDR0
AV
DD
V A
OUT
5
6
7
8
12
11
10
9
V D
OUT
V F
OUT
V H
OUT
CLR
V C
OUT
V E
OUT
V G
OUT
V
REFIN
DACx578
Top
View
1
2
3
4
16
15
14
13
SCL
SDA
GND
V B
OUT
LDAC
ADDR0
AV
DD
V A
OUT
Leave
Floating
DAC5578
DAC6578
DAC7578
SBAS496A –MARCH 2010–REVISED AUGUST 2010
www.ti.com
CONNECTING MULTIPLE DEVICES
Multiple devices of DACx578 family can be connected
on the same bus. Using the address pin, the
DACx578 can be set to one of three different I
2
C
addresses for the TSSOP package and one of eight
addresses for the QFN package. An example
showing three DACx578 devices in TSSOP package
is shown if Figure 120. Note that only one set of
pull-up resistors is needed per bus. The pull-up
resistor values may need to be lowered slightly to
compensate for the additional bus capacitance due to
multiple devices and increased bus length.
Figure 120. Typical Connections of the Multiple
DACx578 on the Same Bus
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