Typical Characteristics - Texas Instruments ADS869 Series Manual

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7.7 Typical Characteristics

At T = 25°C, AVDD = 5 V, DVDD = 3 V, internal reference V
A
15
9
3
±3
±9
±15
±10 ±6
Figure 2. Input I-V Characteristic
350
280
210
140
70
0
±70
±40 ±7
Free-Air Temperature (
Figure 4. Input Impedance Variation vs Temperature
30000
25000
20000
15000
10000
5000
0
131062 131065 131068 131071 131074 131077 131080
Mean = 131072.3, sigma = 2.02, input = 0 V,
range = ±2.5 × V
Figure 6. DC Histogram for Mid-Scale Inputs (±2.5 × V
Copyright © 2015, Texas Instruments Incorporated
----- ± 2.5*V
REF
----- ] 1.25*V
REF
----- ] 0.625*V
REF
----- + 2.5*V
REF
-----+1.25*V
REF
2 6
±2
Input Voltage (V)
----- ± 2.5*V
REF
----- ] 1.25*V
REF
----- ] 0.625*V
REF
----- + 2.5*V
REF
-----+1.25*V
REF
26 59 92
o
C)
Output Codes
REF
Product Folder Links:
= 4.096 V, and f
REF SAMPLE
15
0
------- 25
0
--------40
--------125
9
3
±3
±9
±15
10 ±10 ±6
C001
Input range = ±2.5 × V
Figure 3. Input Current vs Temperature
800
640
480
320
160
0
125 0.85 0.88 0.91 0.94 0.97
C005
Number of samples = 1160
Figure 5. Typical Distribution of Input Impedance
24000
18000
12000
6000
0
131061 131065
C007
Mean = 131072.3, sigma = 2.21, input = 0 V,
) Figure 7. DC Histogram for Mid-Scale Inputs (±1.25 × V
REF
ADS8694 ADS8698
ADS8694, ADS8698
SBAS686 – JULY 2015
= 500 kSPS, unless otherwise noted.
C
C
0
C
2 6
±2
Input Voltage (V)
REF
1 1.03 1.06 1.09 1.12 1.15
Input Impedance (M )
131069 131073 131077
Output Codes
range = ±1.25 × V
REF
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10
C002
C006
131081
C008
)
REF
11