Datasheet

30
40
50
60
70
80
90
-
-
-
-
-
-
-
Power-SupplyRejectionRatio(dB)
0 20 40 60 80 100 120 140 200
AVDDNoiseFrequency(kHz)
160 180
C =100nFonAVDD
SUPPLY
1.40
1.35
1.30
1.25
1.20
1.15
1.10
1.05
1.00
0.95
0.90
ConversionTime( s)m
-40 -25 -10 5 20 35 50 65 125
Temperature( C)°
80 95 110
ADS8556
ADS8557
ADS8558
5500
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
NumberofOccurrences
-3 -2 -1 0 1 2
Code
AVDD=BVDD=5V
HVSS= 15V
HVDD=15V
8192Samples
Range=+4 V
InternalReference
T=+25 C
-
´
REF
°
94
92
90
88
86
84
82
80
78
76
74
72
70
Signal-to-NoiseRatio(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
94
92
90
88
86
84
82
80
78
76
74
72
70
Signal-to-NoiseRatioandDistortion(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
-86
88
90
92
94
96
98
-
-
-
-
-
-
TotalHarmonicDistortion(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
ADS8556
ADS8557
ADS8558
www.ti.com SBAS404B –OCTOBER 2006– REVISED JANUARY 2012
TYPICAL CHARACTERISTICS (continued)
At +25°C, over entire supply voltage range, V
REF
= 2.5V (internal), and f
DATA
= maximum, unless otherwise noted.
PSRR vs AVDD NOISE FREQUENCY CONVERSION TIME vs TEMPERATURE
Figure 17. Figure 18.
CODE HISTOGRAM
(8192 Hits) SNR vs TEMPERATURE
Figure 19. Figure 20.
SINAD vs TEMPERATURE THD vs TEMPERATURE
Figure 21. Figure 22.
Copyright © 2006–2012, Texas Instruments Incorporated 19