Typical Performance Characteristics–AD7804/AD7805/AD7808/AD7809
0.150000
0.125000
0.100000
0.075000
0.050000
0.025000
0.000000
2.0
MAIN DAC = ZERO SCALE
SUB DAC = MID SCALE
AV = DV = 5V
DD
DD
1.5
1.0
V
T
= V /2
DD
BIAS
V
= V /2
BIAS
DD
= +25؇C
A
T
= +25؇C
A
SUB DAC LOADED WITH
1/2 SCALE
V
= 5.5V
0.5
DD
0.0
–0.5
–1.0
–1.5
–2.0
V
= 3V
DD
SINK CURRENT
0.1 0.2 0.3
SOURCE CURRENT
–0.5 –0.4 –0.3 –0.2 –0.1 0.0
0.4 0.5
0
100 200 300 400 500 600 700 800 900 1023
DAC CODE
CURRENT – mA
Figure 29. Sink and Source Current with Zero Scale
Loaded to DAC. VDD = 5 V and VDD = 3 V
Figure 32. Integral Linearity with 5 V Operation
5.200000
2.0
V
= 5.5V
DD
AV = DV = 3V
DD
DD
MAIN DAC = FULL SCALE
SUB DAC = MID SCALE
1.5
1.0
V
T
= V /2
DD
BIAS
5.180000
5.160000
5.140000
5.120000
5.100000
= +25؇C
V
= V /2
A
BIAS
DD
SUB DAC LOADED WITH
1/2 SCALE
T
= +25؇C
A
R
=
L
0.5
0.0
R
= 2k⍀
L
–0.5
–1.0
–1.5
–2.0
SOURCE CURRENT SINK CURRENT
–6.0
–4.0
–2.0
0.0
2.0
4.0
6.0
0
100 200 300 400 500 600 700 800 900 1023
DAC CODE
CURRENT – mA
Figure 30. Sink and Source Current at Full Scale with
Figure 33. Integral Linearity with 3 V Operation
VDD = 5 V
2.850000
2.830000
2.810000
2.790000
2.770000
2.750000
1.225
V
= 3V
DD
V
= 3V
DD
MAIN DAC = FULL SCALE
SUB DAC = MID SCALE
1.224
1.223
1.222
1.221
1.220
1.219
1.218
1.217
1.216
R
= 2k⍀||100pF
L
CODE CHANGE
011111 1111 TO
100000 0000
V
= V /2
BIAS
DD
T
= +25؇C
A
T
= +25؇C
A
R
=
L
R
= 2k⍀
L
SOURCE CURRENT
–4.0 –2.0
SINK CURRENT
2.0
–6.0
0.0
4.0
6.0
0
20
40
60
80 100 120 140 160 180 200
ns
CURRENT – mA
Figure 31. Sink and Source Current at Full Scale with
DD = 3 V
Figure 34. Digital-to-Analog Glitch Impulse
V
REV. A
–21–
ETC [ ETC ]
