Datasheet

AD7626 Data Sheet
Rev. B | Page 12 of 28
92.0
90.0
90.2
90.4
90.6
90.8
91.0
91.2
91.4
91.6
91.8
–40 806040200–20
SNR (dB)
TEMPERATURE (°C)
07648-212
EXTERNAL REFERENCE
INTERNAL REFERENCE
Figure 17. SNR vs. Temperature (−0.5 dB, 20 kHz Input Tone)
0.35
–0.10
–0.05
0
0.05
0.10
0.15
0.20
0.25
0.30
–6–4–20246
INPUT URRENT (mA)
INPUT COMMON-MODE VOLTAGE (V)
+INPUT CURRENT
–INPUT CURRENT
07648-121
Figure 18. Input Current (IN+, IN−) vs. Differential Input Voltage (10 MSPS)
–
103.0
–107.0
–106.5
–106.0
–105.5
–105.0
–104.5
–104.0
–103.5
–40 806040200–20
THD (dB)
TEMPERATURE (°C)
07648-214
EXTERNAL REFERENCE
INTERNAL REFERENCE
Figure 19. THD vs. Temperature (−0.5 dB, 20 kHz Input Tone)
92.0
90.0
90.2
90.4
90.6
90.8
91.0
91.2
91.4
91.6
91.8
–40 806040200–20
SINAD (dB)
TEMPERATURE (°C)
07648-215
EXTERNAL REFERENCE
INTERNAL REFERENCE
Figure 20. SINAD vs. Temperature (−0.5 dB, 20 kHz Input Tone)
0
7648-301
7
6
5
4
3
2
1
0
–1
–40 806040200–20
ZERO ERROR AND GAIN ERROR (LSB)
TEMPERATURE (°C)
ZERO ERROR
GAIN ERROR
Figure 21. Zero Error and Gain Error vs. Temperature
COUNT
CODE (HEX)
0
54
30,651
201,320
30,073
46
0
0
50,000
100,000
150,000
200,000
250,000
FEC7 FEC8 FEC9 FECA FECB FECC FECD
262,144 SAMPLES
STD DEVIATION = 0.4829
0
7648-022
Figure 22. Histogram of 262,144 Conversions of a DC Input
at the Code Center (Internal Reference)