Datasheet

AD7609 Data Sheet
Rev. A | Page 16 of 36
0
32,768
CODE
65,536 98,304
131,072 163,840 196,608 229,376
09760-013
DNL (LSB)
–1.0
0
1.0
0.8
0.6
0.4
0.2
–0.2
–0.4
–0.6
–0.8
±5V RANGE
AV
CC
, V
DRIVE
= 5V
T
A
= 25°C
f
SAMPLE
= 200 kSPS
WCP INL = 0.45 LSB
WCN INL = –0.38 LSB
Figure 14. Typical DNL, ±5 V Range
80
60
40
20
0
–20
–40
–60
–40 –25 –10 5 20 35 50 65 80
–80
NFS ERROR (LSB)
TEMPERATURE (°C)
200kSPS
AV
CC
, V
DRIVE
= 5V
EXTERNAL REFERENCE
±5V RANGE
±10V RANGE
09760-117
Figure 15. NFS Error vs. Temperature
80
60
40
20
0
–20
–40
–60
–40 –25 –10 5 20 35 50 65 80
–80
PFS ERROR (LSB)
TEMPERATURE (°C)
200kSPS
AV
CC
, V
DRIVE
= 5V
EXTERNAL REFERENCE
±5V RANGE
±10V RANGE
09760-118
Figure 16. PFS Error vs. Temperature
40
–40 –25 –10 5 20 35 50 65 80
–40
–32
–24
–16
–8
0
8
16
24
32
NFS/PFS CHANNEL MATCHING (LSB)
TEMPERATURE (°C)
±10V RANGE
AV
CC
, V
DRIVE
= 5V
EXTERNAL REFERENCE
PFS ERROR
NFS ERROR
09760-218
Figure 17. NFS and PFS Error Matching
10
8
6
4
2
0
0120k100k80k60k40k20k
–2
PFS/NFS ERROR (%FS)
SOURCE RESISTANCE (Ω)
AV
CC
, V
DRIVE
= 5V
f
SAMPLE
= 200 kSPS
T
A
= 25°C
EXTERNAL REFERENCE
SOURCE RESISTANCE IS MATCHED ON
THE V– INPUT
±10V AND ±5V RANGE
09760-219
Figure 18. PFS and NFS Error vs. Source Resistance
80
85
90
95
100
105
10 100 10k 10k 100k
SNR (dBs)
INPUT FREQUENCY (Hz)
NO OS
OS × 2
OS × 4
OS × 8
OS × 16
OS × 32
OS × 64
AV
CC
,V
DRIVE
= 5V
f
SAMPLE
CHANGES WITH OS RATE
T
A
= 25°C
INTERNAL REFERENCE
±10V RANGE
09760-017
Figure 19. SNR vs. Input Frequency, ±10 V Range