Datasheet

100
98
96
94
92
90
88
86
Spurious-FreeDynamicRange(dB)
-40 -25 -10 5 20 35 50 65 125
Temperature( C)°
80 95 110
ADS8556
ADS8558
ADS8557
AVDD=BVDD=5V
HVSS= 15V,HVDD=15V
f =10kHz,f =Max
Range= 4 V
InternalReference
-
± ´
SIGNAL DATA
REF
0
20
40
60
80
100
120
140
160
180
-
-
-
-
-
-
-
-
-
Amplitude(dB)
0 25 50 75 100 125 150 175 250
Frequency(kHz)
200 225
AVDD=BVDD=5V
HVSS= 15V
HVDD=15V
f =500kSPS
f =10kHz
Range= 4 V
InternalReference
T=+25 C
-
± ´
°
SAMPLE
SIGNAL
REF
0
20
40
60
80
100
120
140
160
180
-
-
-
-
-
-
-
-
-
Amplitude(dB)
0 25 50 75 100 125 150 175 250
Frequency(kHz)
200 225
AVDD=BVDD=5V
HVSS= 15V,HVDD=15V
f =500kSPS
f =10kHz
Range= 2 V
InternalReference
T=+25 C
-
± ´
°
SAMPLE
SIGNAL
REF
120
115
110
105
100
95
90
85
80
Isolation(dB)
0
30
60 90 120 150 180 210 300
NoiseFrequency(kHz)
240 270
AVDD=BVDD=5V
HVSS= 15V
HVDD=15V
f =Max
Range= 2 V
InternalReference
-
± ´
DATA
REF
2.504
2.503
2.502
2.501
2.500
2.499
2.498
2.497
2.496
V (V)
REF
4.5
4.6
4.7 4.8 4.9 5.0 5.1 5.2 5.5
AVDD(V)
5.3 5.4
V
REF
2.504
2.503
2.502
2.501
2.500
2.499
2.498
2.497
2.496
V (V)
REF
-40 -25 -10 5 20 35 50 65 125
Temperature( C)°
80 95 110
ADS8556
ADS8557
ADS8558
SBAS404B –OCTOBER 2006– REVISED JANUARY 2012 www.ti.com
TYPICAL CHARACTERISTICS (continued)
At +25°C, over entire supply voltage range, V
REF
= 2.5V (internal), and f
DATA
= maximum, unless otherwise noted.
FREQUENCY SPECTRUM
SFDR vs TEMPERATURE (2048-Point FFT, f
IN
= 10kHz, ±10V
IN
Range)
Figure 23. Figure 24.
FREQUENCY SPECTRUM CHANNEL-TO-CHANNEL ISOLATION vs
(2048-Point FFT, f
IN
= 10kHz, ±5V
IN
Range) INPUT NOISE FREQUENCY
Figure 25. Figure 26.
INTERNAL REFERENCE VOLTAGE vs INTERNAL REFERENCE VOLTAGE vs TEMPERATURE
ANALOG SUPPLY VOLTAGE (2.5V Mode) (2.5V Mode)
Figure 27. Figure 28.
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