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AD7298BCPZ-RL7

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P25
AD7298
Rev. B | Page 9 of 24
TYPICAL PERFORMANCE CHARACTERISTICS
–120
–100
–80
–60
–40
–20
0
0 50 100 150 200 250 300
FREQUENCY (kHz)
AMPLITUDE (dB)
350 400 450 500
V
DD
= V
DRIVE
= 3V
f
SAMPLE
= 1.17647MHz
f
IN
= 50kHz
f
SCLK
= 20MHz
SNR = 72.621
THD = –82.562
08754-035
Figure 3.Typical FFT
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.2
0.4
0.6
0.8
1.0
0
256
512
768
1024
1280
1536
1792
2048
2304
2560
2816
3072
3328
3584
3840
4096
INL (LSB)
CODE
T
A
= 25°C
V
DRIVE
= 3V
V
REF
= 2.5V
V
DD
= 3 V
08754-017
Figure 4.Typical ADC INL
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.2
0.4
0.6
0.8
1.0
0
256
512
768
1024
1280
1536
1792
2048
2304
2560
2816
3072
3328
3584
3840
4096
DNL (LSB)
CODE
T
A
= 25°C
V
DRIVE
= 3V
V
REF
= 2.5V
V
DD
= 3 V
08754-016
Figure 5. Typical ADC DNL
0.6
0.4
0.2
0
0.2
0.4
0.6
1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75
INL (LSB)
REFERENCE VOLTAGE (V)
T
A
= 25°C
V
DRIVE
= 3V
V
DD
= 3V
INL MAX
INL MIN
08754-018
Figure 6. INL vs. V
REF
–0.6
–0.4
–0.2
0.2
0
0.4
0.6
1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75
INL (LSB)
REFERENCE VOLTAGE (V)
DNL MAX
DNL MIN
T
A
= 25°C
V
DRIVE
= 3V
V
DD
= 3V
Figure 7. DNL vs. V
REF
2
3
4
5
6
7
8
9
10
11
12
00.51.01.52.02.5
EFFECTIVE NUMBER OF BITS
V
DD
= 3V
V
DRIVE
= 3V
V
REF
(V)
08754-020
Figure 8. Effective Number of Bits vs. V
REF
AD7298
Rev. B | Page 10 of 24
0
0.5
1.0
1.5
2.0
2.5
3.0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
CURRENT LOAD (mA)
V
REF
(V)
V
DD
= V
DRIVE
= 3V
08754-021
Figure 9. V
REF
vs. Reference Output Current Drive
20
25
30
35
40
45
50
55
0 20406080100
TEMPE
R
A
TURE READING (°C)
TIME (Seconds)
08754-028
Figure 10. Response to Thermal Shock from Room Temperature
into 50°C Stirred Oil
–110
–108
–106
–104
–102
–100
–98
–96
–94
–92
–
90
1k 10k 100k 1M 10M 100M
PSRR (dB)
RIPPLE FREQUENCY (Hz)
V
DD
=3V
V
DRIVE
=3V
08754-027
Figure 11. PSRR vs. Supply Ripple Frequency Without Supply Decoupling
70
75
80
85
90
95
100
105
110
0 50 100 150 200 250 300 350 400 450 500 550
ISOL
A
TION (dB)
f
NOISE
(kHz)
08754-029
Figure 12. Channel-to-Channel Isolation, f
IN
= 50 kHz
08754-024
60
62
64
66
68
70
72
74
76
10 100 500
SINAD (dB)
INPUT FREQUENCY (kHz)
R
IN
=0Ω
R
IN
= 200Ω
R
IN
= 100Ω
R
IN
=47Ω
R
IN
=47Ω
R
IN
=33Ω
Figure 13. SINAD vs. Analog Input Frequency for Various Source Impedances
15
20
25
30
35
40
45
50
55
60
65
70
75
0 0.5 1.0 1.5 2.0 2.5
SINAD (dB)
V
DD
= 3V
V
DRIVE
= 3V
V
REF
(V)
0
8754-022
Figure 14. SINAD vs. Reference Voltage
AD7298
Rev. B | Page 11 of 24
–1.5
–1.0
–0.5
0
0.5
1.0
1.5
2.0
TEMPERATURE (°C)
TEMPER
TURE ERROR (°C)
–40 –25 –10 0 10 20 25 30 35 45 60 85 105 125
08754-034
10
11
12
13
14
15
16
17
18
19
0 100 200 300 400 500 600 700 800 900 1000
POWER (mW)
THROUGHPUT (kSPS)
V
DD
= V
DRIVE
= 3V
08754-025
Figure 15. Temperature Accuracy at 3 V
Figure 18. Power vs. Throughput in Normal Mode with V
DD
= 3 V
THD (dB)
SIGNAL FREQUENCY (kHz)
–
60
–65
–70
–75
–80
–85
–90
R
SOURCE
= 0Ω
R
SOURCE
= 33Ω
R
SOURCE
= 100Ω
10 100 500
R
SOURCE
= 43Ω
R
SOURCE
= 200Ω
R
SOURCE
= 47Ω
08754-036
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6
TOTAL CURRENT
(
µA)
V
DD
(V)
–40°C
0°C
+25°C
V
DRIVE
= 3V
+85°C
+105°C
+125°C
0
8754-031
Figure 16. THD vs. Analog Input Frequency for Various Source Impedances
Figure 19. Full Shutdown Current vs. Supply Voltage for Various
Temperatures
0
1
2
3
4
5
6
0 200 400 600 800 1000 1200
CURRENT (mA)
THROUGHPUT (kSPS)
V
DD
CURRENT
V
DRIVE
CURRENT
08754-026
V
DD
= V
DRIVE
= 3V
Figure 17. Average Supply Current vs. Throughput Rate
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P25

AD7298BCPZ-RL7

Mfr. #:
Buy AD7298BCPZ-RL7
Manufacturer:
Analog Devices Inc.
Description:
Analog to Digital Converters - ADC 8-Ch 1 MSPS 10B SAR
Lifecycle:
New from this manufacturer.
Delivery:
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