AD7321 Analog Devices, AD7321 Datasheet - Page 10

• Manufacturer Part Number: AD7321
• Description: 500 kSPS, 2-Channel, Software-Selectable, True Bipolar Input, 12-Bit Plus Sign ADC
• Manufacturer: Analog Devices

Specifications of AD7321

• Resolution (bits): 13bit
• # Chan: 2
• Sample Rate: 500kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni,SE-Uni
• Ain Range: Bip 10V,Bip 2.5V,Bip 5.0V,Uni 10V
• Adc Architecture: SAR
• Pkg Type: SOP

AD7321
TYPICAL PERFORMANCE CHARACTERISTICS
–100
–120
–140
–100
–120
–140
–0.2
–0.4
–0.6
–0.8
–1.0
–20
–40
–60
–80
–20
–40
–60
–80
1.0
0.8
0.6
0.4
0.2
0
0
0
0
0
0
512
1024
Figure 6. Typical DNL True Differential Mode
1536
Figure 4. FFT True Differential Mode
50
50
Figure 5. FFT Single-Ended Mode
2048
2560
3072
FREQUENCY (kHz)
FREQUENCY (kHz)
100
100
3584
CODE
4096
4608
V
T
V
INT/EXT 2.5V REFERENCE
±10V RANGE
+DNL = +0.72LSB
–DNL = –0.22LSB
4096 POINT FFT
V
V
T
INT/EXT 2.5V REFERENCE
±10V RANGE
F
SNR = 74.67dB
SINAD = 74.03dB
THD = –82.68dB
SFDR = –85.40dB
4096 POINT FFT
V
V
T
INT/EXT 2.5V REFERENCE
±10V RANGE
F
SNR = 77.30dB
SINAD = 76.85dB
THD = –86.96dB
SFDR = –88.22dB
A
CC
DD
CC
DD
A
IN
CC
DD
A
IN
150
150
5120
= 25°C
= 25°C
= 25°C
= 50kHz
, V
= 50kHz
, V
, V
= V
= V
= V
SS
5632
SS
SS
DRIVE
DRIVE
DRIVE
= ±15V
= ±15V
= ±15V
6144
= 5V
= 5V
= 5V
200
200
6656
7168
7680
8192
250
250
Rev. A | Page 10 of 36
–0.2
–0.4
–0.6
–0.8
–1.0
–0.2
–0.4
–0.6
–0.8
–1.0
–0.2
–0.4
–0.6
–0.8
–1.0
1.0
0.8
0.6
0.4
0.2
1.0
0.8
0.6
0.4
0.2
1.0
0.8
0.6
0.4
0.2
0
0
0
0
0
0
V
T
V
V
T
V
INT/EXT 2.5V REFERENCE
512
512
512
CC
A
DD
A
CC
DD
= 25°C
= 25°C
1024
1024
1024
, V
, V
= V
Figure 7. Typical INL True Differential Mode
= V
Figure 8. Typical DNL Single-Ended Mode
Figure 9. Typical INL Single-Ended Mode
SS
SS
DRIVE
1536
DRIVE
1536
1536
= ±15V
= ±15V
2048
2048
2048
= 5V
= 5V
2560
2560
2560
3072
3072
3072
INT/EXT 2.5V REFERENCE
±10V RANGE
+INL = +0.55LSB
–INL = –0.68LSB
3584
3584
3584
CODE
CODE
CODE
4096
4096
4096
±10V RANGE
+DNL = +0.79LSB
–DNL = –0.38LSB
4608
4608
4608
V
T
V
INT/EXT 2.5V REFERENCE
±10V RANGE
+INL = +0.87LSB
–INL = –0.49LSB
A
CC
DD
5120
5120
5120
= 25°C
, V
= V
SS
5632
5632
5632
DRIVE
= ±15V
6144
6144
6144
= 5V
6656
6656
6656
7168
7168
7168
7680
7680
7680
8192
8192
8192