Datasheet

AD7631 Data Sheet
Rev. B | Page 12 of 32
TYPICAL PERFORMANCE CHARACTERISTICS
AVDD = DVDD = 5 V; OVDD = 5 V; VCC = 15 V; VEE = −15 V; V
REF
= 5 V; T
A
= 25°C.
06588-005
CODE
INL (LSB)
2.5
2.0
1.5
1.0
0.5
0
–2.5
–2.0
–1.5
–1.0
–0.5
655360 131072 196608 262144
POSITIVE INL = 1.15 LSB
NEGATIVE INL = –0.94 LSB
f
S
= 250kSPS
Figure 5. Integral Nonlinearity vs. Code, Bipolar 10 V Range
06588-006
INL DISTRIBUTION (LSB)
NUMBER OF UNITS
0
10
20
30
40
50
60
–2.0 –1.6 –1.2 –0.8 –0.4 0 0.4 0.8 1.2 1.6 2.0
NEGATIVE INL
POSITIVE INL
Figure 6. Integral Nonlinearity Distribution, Unipolar 10 V Range
(86 Devices)
70000
0
1FFFE 20008
COUNTS
CODE IN HEX
20000 20002 20004 20006
60000
50000
40000
20000
30000
10000
06588-007
σ = 0.80
00
25
34164
2172
20
00
1997
32769
59925
Figure 7. Histogram of 261,120 Conversions of a DC Input
at the Code Center, Bipolar 5 V Range
06588-008
CODE
DNL (LSB)
2.5
2.0
1.5
1.0
0.5
0
–2.5
–2.0
–1.5
–1.0
–0.5
655360 131072 196608 262144
POSITIVE DNL = 0.68 LSB
NEGATIVE DNL = –0.75 LSB
f
S
= 250kSPS
Figure 8. Differential Nonlinearity vs. Code, Bipolar 10 V Range
06588-009
DNL DISTRIBUTION (LSB)
NUMBER OF UNITS
0
10
20
30
40
50
60
–2.0 –1.6 –1.2 –0.8 –0.4 0 0.4 0.8 1.2 1.6 2.0
NEGATIVE DNL
POSITIVE DNL
Figure 9. Differential Nonlinearity Distribution, Bipolar 5 V Range
(86 Devices)
COUNTS
CODE IN HEX
200061FFFC 1FFFE 20000 20002 20004
60000
0
50000
40000
30000
20000
10000
06588-010
00
σ = 0.75
56811
54874
005
6901
294349
11838
Figure 10. Histogram of 261,120 Conversions of a DC Input
at the Code Transition, Bipolar 5 V Range