ADS8284
www.ti.com................................................................................................................................................................................................... SLAS628–MARCH 2009
TYPICAL CHARACTERISTICS (continued)
SPURIOUS FREE DYNAMIC RANGE
vs
OPA SUPPLY VOLTAGE (VCC)
EFFECTIVE NUMBER OF BITS
vs
OPA SUPPLY VOLTAGE (VCC)
SIGNAL-TO-NOISE RATIO
vs
SOURCE RESISTANCE (RIN)
16.05
16.04
16.03
16.02
16.01
16
98.5
98.4
98.3
98.2
98.1
98
125
124
123
122
121
120
Channel = 0
= 25°C,
T
A
V
= 4.096 V,
ref
+VA = 5 V,
f = 1.9 kHz,
i
Throughput = 1 MSPS
Channel = 0
= 25°C,
T
Channel = 0
= 25°C,
A
T
V
= 4.096 V,
A
ref
V
= 4.096 V,
+VA = 5 V,
f = 1.9 kHz,
i
ref
97.9
119
118
117
+VA = 5 V,
f = 1.9 kHz,
i
VCC = -VEE,
Throughput = 1 MSPS
97.8
97.7
VCC = - VEE,
Throughput = 1 MSPS
4
4.5
5
V
5.5
6
6.5
7
- Supply Voltage - V
7.5
8
0
200
400
600
800
1000 1200
4
5
V
6
- Supply Voltage -
7
V
8
CC
CC
R - Input Resistance - W
I
Figure 54.
Figure 55.
Figure 56.
TOTAL HARMONIC DISTORTION
vs
SOURCE RESISTANCE (RIN)
SPURIOUS FREE DYNAMIC RANGE
vs
EFFECTIVE NUMBER OF BITS
vs
SOURCE RESISTANCE (RIN)
SOURCE RESISTANCE (RIN)
125
124
123
122
121
120
119
118
117
-115
-116
-117
-118
-119
-120
16.1
16.05
16
Channel = 0
= 25°C,
Channel = 0
= 25°C,
Channel = 0
= 25°C,
T
A
T
T
A
A
V
= 4.096 V,
ref
V
= 4.096 V,
V
= 4.096 V,
ref
ref
+VA = 5 V,
f = 1.9 kHz,
i
+VA = 5 V,
f = 1.9 kHz,
i
+VA = 5 V,
f = 1.9 kHz,
i
Throughput = 1 MSPS
Throughput = 1 MSPS
Throughput = 1 MSPS
15.95
15.9
-121
-122
116
115
0
200
400
600
800
1000 1200
0
200
400
600
800
1000 1200
0
200
400
600
R - Input Resistance - W
800
1000
R - Input Resistance - W
R - Input Resistance - W
I
I
I
Figure 57.
Figure 58.
Figure 59.
SIGNAL-TO-NOISE RATIO
vs
MULTIPLEXER CHANNELS
TOTAL HARMONIC DISTORTION
vs
SPURIOUS FREE DYNAMIC RANGE
vs
MULTIPLEXER CHANNEL
MULTIPLEXER CHANNEL
98.5
98.4
98.3
98.2
-115
-116
-117
-118
-119
-120
125
124
123
122
121
120
T
= 25°C,
A
V
= 4.096 V,
ref
VCC = 6 V,
VEE = -6 V,
+VA = 5 V,
f = 1.9 kHz,
i
Throughput = 1MSPS
T
= 25°C,
T
= 25°C,
A
A
V
= 4.096 V,
V
= 4.096 V,
ref
ref
VCC = 6 V,
VEE = -6 V,
+VA = 5 V,
VCC = 6 V,
VEE = -6 V,
+VA = 5 V,
119
118
117
f = 1.9 kHz,
i
98.1
98
R = 50 W,
I
-121
-122
VCC = - VEE,
Throughput = 1 MSPS
f = 1.9 kHz,
i
Throughput = 1 MSPS
0
1
2
Multiplexer Channels
3
0
1
2
Multiplexer Channels
3
0
1
2
Multiplexer Channels
3
Figure 60.
Figure 61.
Figure 62.
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