ADS8865_14 Datasheet, PDF (10/49 Pages) Texas Instruments – 16-Bit, 400-kSPS, Serial Interface, microPower, Miniature, True-Differential Input, SAR Analog-to-Digital Converter

ADS8865
SBAS573A – MAY 2013 – REVISED DECEMBER 2013
www.ti.com
TYPICAL CHARACTERISTICS
At T_A = +25°C, AVDD = 3 V, DVDD = 3 V, V_REF = 5 V, and f_SAMPLE = 400 kSPS, unless otherwise noted.
1
1
AVDD = 3 V
AVDD = 3 V
0.75
REF = 2.5 V
0.75
REF = 2.5 V
0.5
T_A = 25ƒC
0.5
T_A = 25ƒC
0.25
0.25
0
0
-0.25
-0.25
-0.5
-0.5
-0.75
-0.75
-1
±32768
±19661 ±6554
6553
19660
ADC Output Code
Figure 6. TYPICAL INL (V_REF = 2.5 V)
32767
C001
-1
±32768
±19661
±6554
6553
19660
ADC Output Code
Figure 7. TYPICAL DNL (V_REF = 2.5 V)
32767
C002
1.00
AVDD = 3 V
0.75
REF = 5 V
0.50
T_A = 25ƒC
0.25
0.00
±0.25
±0.50
±0.75
±1.00
±32768
±19661 ±6554
6553
19660
ADC Output Code
Figure 8. TYPICAL INL (V_REF = 5 V)
32767
C003
1
0.75
0.5
AVDD = 3 V
REF = 5 V
T_A = 25ƒC
0.25
0
-0.25
-0.5
-0.75
-1
±32768
±19661 ±6554
6553
19660
ADC Output Code
Figure 9. TYPICAL DNL (V_REF = 5 V)
32767
C004
1
0.75
0.5
0.25
0
-0.25
-0.5
-0.75
-1
-40
Maximum INL
AVDD = 3 V
REF = 5 V
Minimum INL
-15
10
35
60
85
Free-Air Temperature (^oC)
C00
Figure 10. INL vs TEMPERATURE
1
0.75
0.5
0.25
0
-0.25
-0.5
-0.75
-1
-40
Maximum DNL
AVDD = 3 V
REF = 5 V
Minimum DNL
-15
10
35
60
85
Free-Air Temperature (^oC)
C00
Figure 11. DNL vs TEMPERATURE
10
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