ADS8284
SLAS628–MARCH 2009................................................................................................................................................................................................... www.ti.com
TYPICAL CHARACTERISTICS (continued)
TOTAL HARMONIC DISTORTION
vs
ANALOG SUPPLY VOLTAGE (+VA)
SPURIOUS FREE DYNAMIC RANGE
vs
ANALOG SUPPLY VOLTAGE (+VA)
EFFECTIVE NUMBER OF BITS
vs
ANALOG SUPPLY VOLTAGE (+VA)
-115
-116
-117
-118
-119
-120
125
124
123
122
121
120
16.1
Channel = 0
= 25°C,
Channel = 0
= 25°C,
T
A
T
A
VCC = 6 V,
VEE = -6 V,
V
V
V
= 6 V,
CC
16.075
16.05
= -6 V,
V
= 4.096 V,
EE
ref
= 4.096 V,
f = 1.9 kHz,
i
ref
f = 1.9 kHz,
i
Throughput = 1 MSPS
Channel = 0
= 25°C,
Throughput = 1 MSPS
T
A
VCC = 6 V,
VEE = -6 V,
V
= 4.096 V,
ref
119
118
117
16.025
16
f = 1.9 kHz,
i
Throughput = 1 MSPS
-121
-122
4.7
4.8
4.9
5
5.1
5.2
+VA - Analog Voltage - V
5.3
5.4
4.7
4.8
4.9
+VA - Analog Voltage - V
5
5.1
5.2
5.3
5.4
4.7
4.8
4.9
+VA - Analog Voltage - V
5
5.1
5.2
5.3
5.4
Figure 45.
Figure 46.
Figure 47.
SIGNAL-TO-NOISE RATIO
vs
REFERENCE VOLTAGE
TOTAL HARMONIC DISTORTION
SPURIOUS FREE DYNAMIC RANGE
vs
vs
REFERENCE VOLTAGE
REFERENCE VOLTAGE
-115
-116
-117
-118
-119
-120
125
124
123
122
121
120
99
98.5
98
Channel = 0
= 25°C,
Channel = 0
= 25°C,
T
T
A
A
VCC = 6 V,
VEE = -6 V,
+VA = 5 V,
VCC = 6 V,
VEE = -6 V,
+VA = 5 V,
f = 1.9 kHz,
i
f = 1.9 kHz,
i
Throughput = 1 MSPS
Throughput = 1 MSPS
97.5
97
Channel = 0
= 25°C,
T
A
VCC = 6 V,
VEE = -6 V,
+VA = 5 V,
119
118
117
96.5
f = 1.9 kHz,
i
-121
-122
Throughput = 1 MSPS
96
2.5
2.5
3
3.5 4
- Reference Voltage - V
4.5
2.5
3
3.5
4
4.5
3
3.5 4
- Reference Voltage - V
4.5
V
V
REF
V
- Reference Voltage - V
REF
REF
Figure 48.
Figure 49.
Figure 50.
EFFECTIVE NUMBER OF BITS
vs
SIGNAL-TO-NOISE RATIO
vs
OPA SUPPLY VOLTAGE (VCC)
TOTAL HARMONIC DISTORTION
vs
OPA SUPPLY VOLTAGE (VCC)
REFERENCE VOLTAGE
98.5
98.4
98.3
98.2
16.1
16.05
16
-115
-116
-117
-118
-119
-120
Channel = 0
T
Channel = 0
T
= 25°C,
= 25°C,
A
A
VCC = 6 V,
VEE = -6 V,
+VA = 5 V,
V
= 4.096 V,
ref
+VA = 5 V,
f = 1.9 kHz,
i
15.95
15.9
f = 1.9 kHz,
i
VCC = -VEE,
Throughput = 1 MSPS
Throughput = 1 MSPS
15.85
15.8
Channel = 0
= 25°C,
T
A
V
= 4.096 V,
ref
+VA = 5 V,
f = 1.9 kHz,
i
15.75
15.7
98.1
98
-121
-122
VCC = -VEE,
Throughput = 1 MSPS
15.65
8
5
6
- Supply Voltage - V
4
4.5
5
V
5.5
6
6.5
7
- Supply Voltage - V
7.5
8
7
4
2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3
- Reference Voltage - V
V
V
CC
CC
REF
Figure 51.
Figure 52.
Figure 53.
22
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