DAC7678_10 Datasheet, PDF (11/52 Pages) Texas Instruments – 12-Bit, Octal-Channel, Ultra-Low Glitch, Voltage Output, Two-Wire Interface Digital-to-Analog Converter with 2.5V Internal Reference

DAC7678
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SBAS493A – FEBRUARY 2010 – REVISED AUGUST 2010
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, unless
otherwise noted
SOURCE CURRENT
AT POSITIVE RAIL
SINK CURRENT
AT NEGATIVE RAIL
5.00
Channel D
4.95
0.60
AV_DD = 5.5 V,
Internal Reference Enabled,
0.50 DAC Loaded with 000h
0.40
Channel D
4.90
4.85
AV_DD = 5.5 V,
Internal Reference Enabled,
DAC Loaded with FFFh
4.80
0
1
2
3
4
5
6
7
8
9
10
I_SOURCE - mA
Figure 26.
5.00
Channel H
SOURCE CURRENT
AT POSITIVE RAIL
4.95
0.30
0.20
0.10
0.00
0
1
2
3
4
5
6
7
8
I_SINK - mA
Figure 27.
9 10
SINK CURRENT
AT NEGATIVE RAIL
0.60
AV_DD = 5.5 V,
Internal Reference Enabled,
0.50 ^{DAC Loaded with 000h}
Channel H
0.40
4.90
0.30
4.85
4.80
0
AV_DD = 5.5 V,
Internal Reference Enabled,
DAC Loaded with FFFh
1
2
3
4
5
6
7
8
9 10
I_SOURCE - mA
Figure 28.
2.20
2.10
2.00
1.90
1.80
1.70
1.60
1.50
1.40
1.30
1.20
1.10
0
POWER SUPPLY CURRENT
vs DIGITAL INPUT CODE
AV_DD = 5.5 V,
Internal Reference Enabled,
Code Loaded to all Eight DAC Channels
512 1024 1536 2048 2560 3072 3584 4096
Digital Input Code
Figure 30.
0.20
0.10
0.00
0
1
2
3
4
5
6
7
8
9 10
I_SINK - mA
Figure 29.
POWER SUPPLY CURRENT
vs DIGITAL INPUT CODE
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.00
0
AV_DD = 5.5 V,
External Reference = 5 V,
Internal Reference Disabled,
Code Loaded to all Eight DAC Channels
512 1024 1536 2048 2560 3072 3584 4096
Digital Input Code
Figure 31.
Copyright © 2010, Texas Instruments Incorporated
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