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
Source Current (mA)
Output Voltage (V)
0 1 2 3 4 5 6 7 8 9 10
2.450
2.455
2.460
2.465
2.470
2.475
2.480
2.485
2.490
2.495
2.500
2.455
2.465
2.475
2.485
2.495
Channel A
DAC Loaded With FFFh
External Reference = 2.5V
Sink Current (mA)
Output Voltage (V)
0 1 2 3 4 5 6 7 8 9 10
0.0
0.1
0.2
0.3
0.4
0.5
0.6
Channel A
DAC Loaded With 000h
External Reference = 2.5V
Source Current (mA)
Output Voltage (V)
0 1 2 3 4 5 6 7 8 9 10
2.450
2.455
2.460
2.465
2.470
2.475
2.480
2.485
2.490
2.495
2.500
2.455
2.465
2.475
2.485
2.495
Channel B
DAC Loaded With FFFh
External Reference = 2.5V
Sink Current (mA)
Output Voltage (V)
0 1 2 3 4 5 6 7 8 9 10
0.0
0.1
0.2
0.3
0.4
0.5
0.6
Channel B
DAC Loaded With 000h
External Reference = 2.5V
Source Current (mA)
Output Voltage (V)
0 1 2 3 4 5 6 7 8 9 10
2.450
2.455
2.460
2.465
2.470
2.475
2.480
2.485
2.490
2.495
2.500
2.455
2.465
2.475
2.485
2.495
Channel G
DAC Loaded With FFFh
External Reference = 2.5V
Sink Current (mA)
Output Voltage (V)
0 1 2 3 4 5 6 7 8 9 10
0.0
0.1
0.2
0.3
0.4
0.5
0.6
Channel G
DAC Loaded With 000h
External Reference = 2.5V
DAC5578
DAC6578
DAC7578
www.ti.com
SBAS496A –MARCH 2010–REVISED AUGUST 2010
TYPICAL CHARACTERISTICS: DAC AT AV
DD
= 2.7 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).
SOURCE CURRENT SINK CURRENT
AT POSITIVE RAIL AT NEGATIVE RAIL
Figure 89. Figure 90.
SOURCE CURRENT SINK CURRENT
AT POSITIVE RAIL AT NEGATIVE RAIL
Figure 91. Figure 92.
SOURCE CURRENT SINK CURRENT
AT POSITIVE RAIL AT NEGATIVE RAIL
Figure 93. Figure 94.
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