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
Frequency (Hz)
Voltage Noise (nV/
√Hz)
0
50
100
150
200
250
300
20 100 100k
Zero Scale
Mid Scale
Full Scale
DAC Output Unloaded
External Reference = 5V
1k 10k
~3 Vm
PP
V (1 V/div)
OUT
m
Time (2 s/div)
DAC5578
DAC6578
DAC7578
SBAS496A –MARCH 2010–REVISED AUGUST 2010
www.ti.com
TYPICAL CHARACTERISTICS: DAC at AV
DD
= 5.5 V (continued)
At T
A
= 25°C, external reference used, DAC output not loaded, and all DAC codes in straight binary data format, DAC7578
graphs shown (unless otherwise noted).
DAC OUTPUT NOISE
DAC OUTPUT NOISE DENSITY
vs FREQUENCY 0.1 Hz to 10 Hz
Figure 55. Figure 56.
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