AD7631BCPZ Analog Devices Inc, AD7631BCPZ Datasheet - Page 12

• Manufacturer Part Number: AD7631BCPZ
• Description: IC,A/D CONVERTER,SINGLE,18-BIT,CMOS,LLCC,48PIN
• Manufacturer: Analog Devices Inc
• Series: PulSAR®r

Specifications of AD7631BCPZ

• Number Of Bits: 18
• Sampling Rate (per Second): 250k
• Data Interface: Serial, Parallel
• Number Of Converters: 1
• Power Dissipation (max): 120mW
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-VFQFN, CSP Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD7631
TYPICAL PERFORMANCE CHARACTERISTICS
AVDD = DVDD = 5 V; OVDD = 5 V; VCC = 15 V; VEE = −15 V; V
–0.5
–1.0
–1.5
–2.0
–2.5
Figure 6. Integral Nonlinearity Distribution, Unipolar 10 V Range
2.5
2.0
1.5
1.0
0.5
70000
60000
50000
40000
30000
20000
10000
60
50
40
30
20
10
0
Figure 5. Integral Nonlinearity vs. Code, Bipolar 10 V Range
Figure 7. Histogram of 261,120 Conversions of a DC Input
–2.0
0
0
0
f
S
1FFFE
= 250kSPS
NEGATIVE INL
POSITIVE INL
–1.6
0
at the Code Center, Bipolar 5 V Range
0
–1.2
65536
20000
25
–0.8
INL DISTRIBUTION (LSB)
1997
–0.4
(86 Devices)
20002
32769
CODE IN HEX
131072
CODE
59925
0
POSITIVE INL = 1.15 LSB
NEGATIVE INL = –0.94 LSB
20004
34164
0.4
2172
196608
0.8
20006
1.2
20
σ = 0.80
1.6
0
262144
20008
0
2.0
Rev. A | Page 12 of 32
REF
= 5 V; T
A
Figure 9. Differential Nonlinearity Distribution, Bipolar 5 V Range
–0.5
–1.0
–1.5
–2.0
–2.5
60000
50000
40000
30000
20000
10000
Figure 8. Differential Nonlinearity vs. Code, Bipolar 10 V Range
2.5
2.0
1.5
1.0
0.5
= 25°C.
60
50
40
30
20
10
0
Figure 10. Histogram of 261,120 Conversions of a DC Input
–2.0
0
0
0
f
1FFFC
S
= 250kSPS
NEGATIVE DNL
POSITIVE DNL
0
–1.6
at the Code Transition, Bipolar 5 V Range
0
–1.2
65536
1FFFE
5
–0.8
DNL DISTRIBUTION (LSB)
349
–0.4
(86 Devices)
11838
20000
CODE IN HEX
131072
CODE
54874
0
POSITIVE DNL = 0.68 LSB
NEGATIVE DNL = –0.75 LSB
20002
56811
0.4
6901
0.8
196608
20004
294
1.2
σ = 0.75
1.6
0
20006
262144
0
2.0