ADS8382_16 Datasheet, PDF (8/36 Pages) Texas Instruments – 18-BIT, 600-kHz, FULLY DIFFERENTIAL PSEUDO-BIPOLAR INPUT, MICROPOWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH SERIAL INTERFACE AND REFERENCE

ADS8382
SLAS416B – JUNE 2004 – REVISED NOVEMBER 2004
www.ti.com
TYPICAL CHARACTERISTICS
SIGNAL-TO-NOISE RATIO
vs
REFERENCE VOLTAGE
97
f_i = 1 kHz,
+VA = 5 V,
96 _{+VBD = 5 V,}
T_A = 25°C
95
94
93
92
91
2.5
3
3.5
4
V_ref − Reference Voltage − V
Figure 1.
SPURIOUS FREE DYNAMIC RANGE
vs
REFERENCE VOLTAGE
121.5
121
120.5
f_i = 1 kHz,
+VA = 5 V,
+VBD = 5 V,
T_A = 25°C
120
119.5
119
118.5
118
117.5
2.5
3
3.5
4
V_ref − Reference Voltage − V
Figure 3.
EFFECTIVE NUMBER OF BITS
vs
REFERENCE VOLTAGE
15.7
15.6
f_i = 1 kHz,
+VA = 5 V,
15.5
+VBD = 5 V,
T_A = 25°C
15.4
15.3
15.2
15.1
15
14.9
14.8
2.5
3
3.5
4
V_ref − Reference Voltage − V
Figure 5.
SIGNAL-TO-NOISE
AND DISTORTION
vs
REFERENCE VOLTAGE
97
f_i = 1 kHz,
96
+VA = 5 V,
+VBD = 5 V,
T_A = 25°C
95
94
93
92
91
2.5
3
3.5
4
V_ref − Reference Voltage − V
Figure 2.
TOTAL HARMONIC DISTORTION
vs
REFERENCE VOLTAGE
−116.2
−116.4
−116.6
f_i = 1 kHz,
+VA = 5 V,
+VBD = 5 V,
T_A = 25°C
−116.8
−117
−117.2
−117.4
−117.6
−117.8
2.5
3
3.5
4
V_ref − Reference Voltage − V
Figure 4.
EFFECTIVE NUMBER OF BITS
vs
FREE-AIR TEMPERATURE
16
+VA = 5 V,
15.9 _{+VBD = 5 V,}
15.8
REFIN = 4.096 V,
f_i = 1 kHz
15.7
15.6
15.5
15.4
15.3
15.2
15.1
15
−40 −25 −10 5 20 35 50 65 80
T_A − Free-Air Temperature − °C
Figure 6.
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