Datasheet

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TYPICAL CHARACTERISTICS
0
10000
20000
30000
40000
50000
60000
70000
80000
65295
65292
65289
+VA = 5 V,
+VBD = 3.3 V,
T
A
= 25°C,
Code = 65292
85.2
85.4
85.6
85.8
86
86.2
86.4
86.6
86.8
−40 −25 −10 5 20 35 50 65 80
SNR − Signal-to-Noise Ratio − dB
T
A
− Free-Air Temperature − C
f
i
= 50 kHz,
Full Scale Input,
+VA = 5 V,
+VBD = 3 V,
Int Ref = 4.096 V
81.8
82
82.2
82.4
82.6
82.8
83
83.2
83.4
83.6
−40 −25 −10
5
20 35 50 65 80
SINAD − Signal-to-Noise and Distortion − dB
T
A
− Free-Air Temperature − C
f
i
= 50 kHz,
Full Scale Input,
+VA = 5 V,
+VBD = 3 V,
Int Ref = 4.096 V
13.25
13.3
13.35
13.4
13.45
13.5
13.55
13.6
−40 −25 −10 5 20 35 50 65 80
ENOB − Effective Number of Bits − Bits
T
A
− Free-Air Temperature − C
f
i
= 50 kHz,
Full Scale Input,
+VA = 5 V,
+VBD = 3 V,
Int Ref = 4.096 V
ADS8405
SLAS427 – DECEMBER 2004
At –40 ° C to 85 ° C, +VA = 5 V, +VBD = 5 V, REFIN = 4.096 V (internal reference used) and f
sample
= 1.25 MHz
(unless otherwise noted)
SIGNAL-TO-NOISE RATIO
HISTOGRAM (DC Code Spread) vs
HALF SCALE 131071 CONVERSIONS FREE-AIR TEMPERATURE
Figure 6. Figure 7.
SIGNAL-TO-NOISE AND DISTORTION EFFECTIVE NUMBER OF BITS
vs vs
FREE-AIR TEMPERATURE FREE-AIR TEMPERATURE
Figure 8. Figure 9.
13