AD7298 Analog Devices, AD7298 Datasheet - Page 11

• Manufacturer Part Number: AD7298
• Description: 8-Channel, 1MSPS, 12-Bit SAR ADC with Temperature Sensor
• Manufacturer: Analog Devices

Specifications of AD7298

• Resolution (bits): 12bit
• # Chan: 8
• Sample Rate: 1MSPS
• Interface: SPI
• Analog Input Type: SE-Uni
• Ain Range: Uni (Vref),Uni 1.0V,Uni 1.25,Uni 2.0V,Uni 2.5V
• Adc Architecture: SAR
• Pkg Type: CSP

Figure 16. THD vs. Analog Input Frequency for Various Source Impedances
–60
–65
–70
–75
–80
–85
–90
–0.5
–1.0
–1.5
6
5
4
3
2
1
0
2.0
1.5
1.0
0.5
0
0
10
Figure 17. Average Supply Current vs. Throughput Rate
V
–40 –25 –10 0
DD
= V
R
SOURCE
Figure 15. Temperature Accuracy at 3 V
DRIVE
200
V
= 3V
DD
= 43Ω
V
CURRENT
SIGNAL FREQUENCY (kHz)
DRIVE
400
THROUGHPUT (kSPS)
R
10 20 25 30 35 45 60 85 105 125
SOURCE
TEMPERATURE (°C)
CURRENT
R
600
= 100Ω
R
SOURCE
SOURCE
100
= 0Ω
= 200Ω
800
R
SOURCE
R
SOURCE
1000
= 47Ω
= 33Ω
1200
500
Rev. B | Page 11 of 24
Figure 18. Power vs. Throughput in Normal Mode with V
Figure 19. Full Shutdown Current vs. Supply Voltage for Various
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
19
18
17
16
15
14
13
12
11
10
0
2.8
0
V
DD
100
–40°C
0°C
+25°C
= V
2.9
DRIVE
200
3.0
= 3V
+85°C
+105°C
+125°C
300
THROUGHPUT (kSPS)
3.1
Temperatures
400
V
500
DD
3.2
(V)
600
3.3
700
3.4
800
V
DRIVE
3.5
900
AD7298
DD
= 3V
= 3 V
1000
3.6