Datasheet

Data Sheet AD7322
Rev. B | Page 11 of 36
8k
0
–3
CODE
NUMBER OF OCCURRENCES
7k
6k
5k
4k
3k
2k
1k
–2 –1 0 1 2 3
V
CC
= 5V
V
DD
/V
SS
= ±12V
RANGE = ±10V
10k SAMPLES
T
A
= 25°C
023
1201
7600
1165
11 0
04863-014
Figure 16. Histogram of Codes, Single-Ended Mode
–
50
–100
0
RIPPLE FREQUENCY (kHz)
CMRR (dB)
–55
–60
–65
–70
–75
–80
–85
–90
–95
200 400 600 800 1000 1200
DIFFERENTIAL MODE
f
IN
= 50kHz
V
DD
/V
SS
= ±12V
f
S
= 1MSPS
T
A
= 25°C
V
CC
= 5V
V
CC
= 3V
0
4863-055
Figure 17. CMRR vs. Common-Mode Ripple Frequency
2.0
–2.0
±V
DD
/V
SS
SUPPLY VOLTAGE (V)
DNL ERROR (LSB)
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
5 7 9 11 13 15 17 19
±5V RANGE
V
CC
=V
DRIVE
=5V
INTERNAL REFERENCE
SINGLE-ENDED MODE
DNL = 750kSPS
DNL = 750kSPS
DNL = 500kSPS
DNL = 500kSPS
DNL = 1MSPS
DNL = 1MSPS
04863-049
Figure 18. DNL Error vs. Supply Voltage at 500 kSPS, 750 kSPS, and 1 MSPS
2.0
–2.0
±V
DD
/V
SS
SUPPLY VOLTAGE (V)
INL ERROR (LSB)
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
5 7 9 11 13 15 17 19
±5V RANGE
V
CC
=V
DRIVE
=5V
INTERNAL REFERENCE
SINGLE-ENDED MODE
INL = 750kSPS
INL = 500kSPS
INL = 1MSPS
INL = 750kSPS
INL = 500kSPS
INL = 1MSPS
04863-050
Figure 19. INL Error vs. Supply Voltage at 500 kSPS, 750 kSPS, and 1 MSPS
–
50
–100
0 1200
SUPPLY RIPPLE FREQUENCY (kHz)
PSRR (dB)
–55
–60
–65
–70
–75
–80
–85
–90
–95
200 400 600 800 1000
100mV p-p SINE WAVE ON EACH SUPPLY
NO DECOUPLING
SINGLE-ENDED MODE
f
S
=1MSPS
V
CC
=5V
V
CC
=3V
V
DD
=12V
V
SS
=–12V
04863-054
Figure 20. PSRR vs. Supply Ripple Frequency Without Supply Decoupling
10
1000
ANALOG INPUT FREQUENCY (kHz)
THD (dB)
100
–
50
–55
–60
–65
–70
–75
–80
–85
–90
–95
V
CC
=V
DRIVE
=5V
V
DD
/V
SS
= ±12V
T
A
=25°C
INTERNAL REFERENCE
RANGE = ±10V AND ±2.5V
R
IN
=50Ω,
±2.5V RANGE
R
IN
=50Ω,
±10V RANGE
R
IN
=100Ω,
±2.5V RANGE
R
IN
=1000Ω,
±2.5V RANGE
R
IN
=2000Ω,
±2.5V RANGE
R
IN
=4700Ω,
±2.5V RANGE
R
IN
= 2000Ω, ±10V RANGE
R
IN
= 1000Ω, ±10V RANGE
R
IN
= 100Ω, ±10V RANGE
04863-015
Figure 21. THD vs. Analog Input Frequency for Various Source Impedances,
True Differential Mode