AD7626 Analog Devices, AD7626 Datasheet - Page 12

• Manufacturer Part Number: AD7626
• Description: 16-Bit, 10 MSPS, PulSAR Differential ADC
• Manufacturer: Analog Devices

Specifications of AD7626

• Resolution (bits): 16bit
• # Chan: 1
• Sample Rate: 10MSPS
• Interface: LVDS,Ser
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref) p-p
• Adc Architecture: SAR
• Pkg Type: CSP

AD7626
Figure 18. Input Current (IN+, IN−) vs. Differential Input Voltage (10 MSPS)
–103.0
–103.5
–104.0
–104.5
–105.0
–105.5
–106.0
–106.5
–107.0
–0.05
–0.10
92.0
91.8
91.6
91.4
91.2
91.0
90.8
90.6
90.4
90.2
90.0
0.35
0.30
0.25
0.20
0.15
0.10
0.05
Figure 19. THD vs. Temperature (−0.5 dB, 20 kHz Input Tone)
Figure 17. SNR vs. Temperature (−0.5 dB, 20 kHz Input Tone)
–40
0
–40
–6
–20
–20
–4
INPUT COMMON-MODE VOLTAGE (V)
0
0
–2
TEMPERATURE (°C)
TEMPERATURE (°C)
INTERNAL REFERENCE
20
20
INTERNAL REFERENCE
0
EXTERNAL REFERENCE
EXTERNAL REFERENCE
40
40
+INPUT CURRENT
–INPUT CURRENT
2
60
60
4
80
80
6
Rev. A | Page 12 of 2
250,000
200,000
150,000
100,000
92.0
91.8
91.6
91.4
91.2
91.0
90.8
90.6
90.4
90.2
90.0
50,000
Figure 20. SINAD vs. Temperature (−0.5 dB, 20 kHz Input Tone)
–1
7
6
5
4
3
2
1
0
Figure 22. Histogram of 262,144 Conversions of a DC Input
–40
–40
0
Figure 21. Zero Error and Gain Error vs. Temperature
ZERO ERROR
GAIN ERROR
262,144 SAMPLES
STD DEVIATION = 0.4829
FEC7
0
–20
–20
at the Code Center (Internal Reference)
FEC8
54
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
30,651
FEC9
20
20
CODE (HEX)
INTERNAL REFERENCE
201,320
FECA
EXTERNAL REFERENCE
40
40
FECB
30,073
60
60
FECC
46
80
80
FECD
0