Datasheet

AD7694
Rev. A | Page 9 of 16
TYPICAL PERFORMANCE CHARACTERISTICS
4
–4
–3
–2
–1
0
1
2
3
0 3276816384 49152 65536
05003-005
CODE
INL (LSB)
POSITIVE INL = +0.68 LSB
NEGATIVE INL = –1.14 LSB
Figure 5. Integral Nonlinearity vs. Code
12000
10000
8000
6000
4000
2000
0
24E0 24E1 24E2 24E3 24E4 24E5 24E6 24E7 24E8
05003-006
CODE IN HEX
COUNTS
001 00
12500
10003
0
108568
VDD = REF = 5V
Figure 6. Histogram of a DC Input at the Code Center
0
–180
–160
–140
–120
–100
–80
–60
–40
–20
0 20 40 60 80 100 120
05003-007
FREQUENCY (kHz)
AMPLITUDE (dB OF FULL SCALE)
16384 POINT FFT
VDD = REF = 5V
f
S
= 250kSPS
f
IN
= 20.43kHz
SNR = 92.5dB
THD = –109.9dB
SFDR = –111.0dB
Figure 7. FFT Plot
2.0
–2.0
–1.5
–1.0
–0.5
0
0.5
1.0
1.5
0 3276816384 49152 65536
05003-008
CODE
DNL (LSB)
POSITIVE DNL = +0.59 LSB
NEGATIVE DNL = –0.56 LSB
Figure 8. Differential Nonlinearity vs. Code
8000
7000
6000
5000
4000
3000
2000
1000
0
251B 251C 251D 251E 251F 2520 2521 2522 2523 2524 2525 2526
05003-009
CODE IN HEX
COUNTS
VDD = REF = 2.5V
0027
2808
50
100
28148
65487
2133
32418
Figure 9. Histogram of a DC Input at the Code Center
0
–180
–160
–140
–120
–100
–80
–60
–40
–20
0 10203040506070
05003-010
FREQUENCY (kHz)
AMPLITUDE (dB OF FULL SCALE)
16384 POINT FFT
VDD = REF = 2.5V
f
S
= 150kSPS
f
IN
= 20.43kHz
SNR = 88.5dB
THD = –102.7dB
SFDR = –105.1dB
Figure 10. FFT Plot