Datasheet

REV. 0
–9–
AD7650
Typical Performance Characteristics–
CODE
INL – LSB
4
3
–4
0 16384 65536
32768 49152
0
–1
–2
–3
2
1
TPC 1. Integral Nonlinearity
vs. Code
CODE – Hexa
COUNTS
8001
7FFC 8000
7FFD 7FFF
7000
6000
5000
4000
8000
8002
8003
8004
8005
3000
2000
1000
0
7FFE
12000014
850759
7396
7353
TPC 4. Histogram of 16,384
Conversions of a DC Input at the
Code Center
FREQUENCY – kHz
THD, HARMONICS – dB
–60
0
–65
–70
–75
–80
–85
–90
–95
–100
–105
–110
–115
10 100 1k
110
105
100
95
90
85
80
75
70
65
60
SFDR – dB
SFDR
THD
2
ND
HARMONIC
3
RD
HARMONIC
115
TPC 7. THD, Harmonics, and SFDR
vs. Frequency
CODE
DNL – LSB
3
0 16384 65536
32768 49152
0
–1
–2
–3
2
1
TPC 2. Differential Nonlinearity
vs. Code
FREQUENCY – kHz
AMPLITUDE – dB of Full Scale
0
0 57 228
114 171
–60
–80
–100
–120
–20
–40
–140
–160
285
f
S
= 571kSPS
f
IN
= 45.01kHz
SNR = 87dB
THD = –96dB
SFDR = 98dB
SINAD = 86.5dB
TPC 5. FFT Plot
SAMPLING RATE – SPS
OPERATING CURRENT – ␮A
100k
0.001
0.1
10k
1k
100
10
1
0.1
0.01
1 10 100 1k 10k 100k 1M
AVDD, WARP/NORMAL
DVDD, WARP/NORMAL
AVDD, IMPULSE
DVDD, IMPULSE
OVDD, ALL MODES
TPC 8. Operating Currents
vs. Sample Rate
CODE – Hexa
COUNTS
10000
8002
7FFD 8001
7FFE 8000
7000
6000
5000
4000
9000
8000
8003
8004
8005
8006
3000
2000
1000
0
0 0 79 151 1 0 0
7FFF
3336
3303
9514
TPC 3. Histogram of 16,384
Conversions of a DC Input at the
Code Transition
FREQUENCY – kHz
SNR AND S/[N+D] – dB
100
110 1k
100
85
80
75
70
95
90
ENOB
SNR
SINAD
15.0
14.5
14.0
13.5
13.0
12.5
12.0
ENOB – Bits
TPC 6. SNR, S/(N+D), and ENOB
vs. Frequency
50
0
t
12
DELAY – ns
C
L
– pF
200
50
20
10
0
100 150
30
40
OVDD = 2.7V, 85ⴗC
OVDD = 2.7V, 25ⴗC
OVDD = 5V, 85ⴗC
OVDD = 5V, 25ⴗC
TPC 9. Typical Delay vs. Load
Capacitance C
L