Datasheet

Data Sheet AD7877
Rev. D | Page 11 of 44
3145
3135
3125
3115
3105
3095
3085
3075
3065
3055
3045
–50 –30 –10 10 30 50 70 90
03796-041
TEMPERATURE (°C)
ADC CODE (Decimal)
Figure 18. ADC Code vs. Temperature (2.7 V Supply)
1183
1176
1177
1178
1179
1180
1181
1182
2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6
03796-042
V
CC
(V)
TEMP1 CODE
Figure 19. Temp1 vs. V
CC
982
975
976
977
978
979
980
981
2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6
03796-043
V
CC
(V)
TEMP0 CODE
Figure 20. Temp0 vs. V
CC
03796-047
INTERNAL V
REF
(V)
TURN-ON TIME (µs)
0
2.5
6
20 40 60 80 100 120–20 0
NO CAP
0.711µs SETTLING TIME
100nF CAP
54.64µs SETTLING TIME
Figure 21. Internal V
REF
vs. Turn-On Time
10
–150
–130
–110
–90
–70
–50
–30
–10
0 10k 20k 30k
SNR 70.25dB
THD 78.11dB
40k
03796-035
FREQUENCY
INPUT TONE AMPLITUDE (dB)
Figure 22. Typical FFT Plot for the Auxiliary Channels of the AD7877
at 90 kHz Sample Rate and 10 kHz Input Frequency
3.50
0
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
2.75
3.00
3.25
0 1 2 3 4 5 6 7 8 9 10
03796-036
SOURCE/SINK CURRENT (mA)
DAC O/P LEVEL (V)
DAC O/P SOURCE ABILITY
DAC O/P SINK ABILITY
Figure 23. DAC Source and Sink Current Capability