AD7799 Analog Devices, AD7799 Datasheet - Page 12

• Manufacturer Part Number: AD7799
• Description: 3-Channel, Low Noise, Low Power, 24-Bit, Sigma Delta ADC with On-Chip In-Amp
• Manufacturer: Analog Devices

Specifications of AD7799

• Resolution (bits): 24bit
• # Chan: 3
• Sample Rate: n/a
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref/PGA Gain) p-p
• Adc Architecture: Sigma-Delta
• Pkg Type: SOP

AD7798/AD7799
TYPICAL PERFORMANCE CHARACTERISTICS
Figure 6. AD7799 Noise (V
Figure 8. AD7799 Noise (V
8388640
8388630
8388620
8388610
8388600
8388590
8388580
8388680
8388660
8388640
8388620
8388600
8388580
8388560
8388540
Figure 7. AD7799 Noise Distribution Histogram (V
50
40
30
20
10
0
0
0
Gain = 64, Update Rate = 4.17 Hz)
200
200
REF
REF
= AV
= AV
400
400
DD
DD
CODE
SAMPLES
SAMPLES
/2, Gain = 64, Update Rate = 4.17 Hz)
/2, Gain = 64, Update Rate = 16.7 Hz)
600
600
REF
800
800
= AV
DD
/2,
999
999
Rev. A | Page 12 of 28
Figure 9. AD7799 Noise Distribution Histogram (V
3.0
2.5
2.0
1.5
1.0
0.5
30
25
20
15
10
5
0
0
0
Figure 10. RMS Noise vs. Reference Voltage (Gain = 1)
V
UPDATE RATE = 16.6Hz
T
DD
A
= 25°C
0.5
= 5V
1.0
Gain = 64, Update Rate = 16.7 Hz)
1.5
REFERENCE VOLTAGE (V)
2.0
CODE
2.5
3.0
3.5
4.0
REF
= AV
4.5
DD
/2,
5.0