DAC8805_14 Datasheet, PDF (14/25 Pages) Texas Instruments – 14-Bit, Dual, Parallel Input, Multiplying Digital-to-Analog Converter

DAC8805
SBAS391A – DECEMBER 2006 – REVISED MAY 2007
TYPICAL CHARACTERISTICS: V_DD = +2.7V and +5V
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180
160
140
120
100
80
60
40
20
0
0
SUPPLY CURRENT
vs LOGIC INPUT VOLTAGE
V_DD = +5.0V
V_DD = +2.7V
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
Logic Input Voltage (V)
Figure 34.
6
0
-6
-12
-18
-24
-30
-36
-42
-48
-54
-60
-66
-72
-78
-84
-90
-96
-102
-108
-114
10
REFERENCE MULTIPLYING BANDWIDTH
UNIPOLAR MODE
0x3FFF
0x2000
0x1000
0x0800
0x0400
0x0200
0x0100
0x0080
0x0040
0x0020
0x0010
0x0008
0x0004
0x0002
0x0001
0x0000
100 1k 10k 100k 1M 10M 100M
Bandwidth (Hz)
Figure 35.
6
0
-6
-12
-18
-24
-30
-36
-42
-48
-54
-60
-66
-72
-78
-84
-90
-96
-102
-108
-114
10
REFERENCE MULTIPLYING BANDWIDTH
BIPOLAR MODE
DAC 0V output
limited by bipolar
zero error to
-84dB typical
(-76dB max).
0x3FFF
0x3000
0x2800
0x2400
0x2200
0x2100
0x2080
0x2040
0x2020
0x2010
0x2008
0x2004
0x2002
0x2001
0x2000
Codes from Midscale
to Positive Full-Scale
100 1k 10k 100k 1M 10M 100M
Bandwidth (Hz)
Figure 36.
6
0
-6
-12
-18
-24
-30
-36
-42
-48
-54
-60
-66
-72
-78
-84
-90
-96
-102
-108
-114
10
REFERENCE MULTIPLYING BANDWIDTH
BIPOLAR MODE
DAC 0V output
limited by bipolar
zero error to
-84dB typical
(-76dB max).
0x0000
0x1000
0x1800
0x1C00
0x1E00
0x1F00
0x1F80
0x1FC0
0x1FE0
0x1FF0
0x1FF8
0x1FFC
0x1FFE
0x1FFF
0x2000
Codes from Negative
Full-Scale to Midscale
100 1k 10k 100k 1M 10M 100M
Bandwidth (Hz)
Figure 37.
SUPPLY CURRENT vs TEMPERATURE
6
DAC SETTLING TIME
5
V_DD = 5.0V
4
3
V_DD = 2.7V
2
1
Unipolar Mode
Voltage Output Settling
Trigger Pulse
0
-50 -30 -10 10 30 50 70
Temperature (°C)
Figure 38.
90 110 130
Time (0.5ms/div)
Figure 39.
14
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