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
Zoomed Rising Edge
100 V/divm
Rising Edge
2 V/div
Trigger Pulse
5 V/div
Time (5 s/div)m
From Code 400h to C00h
Zoomed Falling Edge
100 V/divm
Falling Edge
2 V/div
Trigger Pulse
5 V/div
Time (5 s/div)m
From Code C00h to 400h
V - 2 mV/div
OUT
AV - 2 V/div
DD
Time (10 ms/div)
~2 mV
PP
DAC Unloaded
DAC at Zero Scale
G045
AV = 5.5 V,
Clock Feedthrough Impulse ~1.5 nV-s
DD
t - Time - 1 s/divm
V - 5 mV/div
OUT
SCL - 5 V/div
V - 2 V/div
OUT
AV - 2 V/div
DD
Time (20 ms/div)
DAC Unloaded
DAC at Zero Scale
V - 1 mV/div
OUT
AV - 2 V/div
DD
Time (10 ms/div)
DAC Unloaded
DAC at Zero Scale
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).
HALF-SCALE SETTLING TIME: HALF-SCALE SETTLING TIME:
5V RISING EDGE 5V FALLING EDGE
Figure 43. Figure 44.
CLOCK FEEDTHROUGH POWER-ON GLITCH
400 kHz MIDSCALE RESET TO ZERO SCALE
Figure 45. Figure 46.
POWER-ON GLITCH
RESET-TO-MID SCALE POWER-OFF GLITCH
Figure 47. Figure 48.
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