AD7329 Analog Devices, AD7329 Datasheet - Page 13

• Manufacturer Part Number: AD7329
• Description: 1 MSPS , 8-Channel, Software Selectable True Bipolar Input, 12-Bit Plus Sign A/D Converter
• Manufacturer: Analog Devices

Specifications of AD7329

• Resolution (bits): 13bit
• # Chan: 8
• Sample Rate: 1MSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Bip,Diff-Uni,SE-Uni
• Ain Range: Bip (Vref),Bip (Vref) x 2,Bip (Vref) x 4,Bip 10V,Bip 2.5V,Bip 5.0V,Uni (Vref),Uni 10V
• Adc Architecture: SAR
• Pkg Type: SOP

Figure 18. DNL Error vs. Supply Voltage at 500 kSPS and 1 MSPS
–100
–0.5
–1.0
–1.5
–2.0
–50
–55
–60
–65
–70
–75
–80
–85
–90
–95
2.0
1.5
1.0
0.5
8k
7k
6k
5k
4k
3k
2k
1k
0
0
±5
0
Figure 17. CMRR vs. Common-Mode Ripple Frequency
Figure 16. Histogram of Codes, Single-Ended Mode
V
CC
–3
0
= 5V
V
±7
DNL = 1MSPS
200
CC
SUPPLY VOLTAGE (V) (V
DNL = 500kSPS
= 3V
23
–2
±9
RIPPLE FREQUENCY (kHz)
400
1201
–1
±11
CODE
600
7600
0
±5V RANGE
V
INTERNAL REFERENCE
SINGLE-ENDED MODE
AD8021 BETWEEN MUX
±13
CC
AND ADC
DD
DIFFERENTIAL MODE
f
V
f
T
IN
S
A
= V
DD
1165
= 1MSPS
= +, V
= 50kHz
= 25°C
V
V
RANGE = ±10V
10k SAMPLES
T
800
1
DRIVE
A
= 12V, V
CC
DD
DNL = 500kSPS
= 25°C
±15
IN
= 5V
= 12V, V
SS
+ PINS
DNL = 1MSPS
= 5V
= –)
SS
11
2
1000
= –12V
±17
SS
= –12V
OUT
0
3
1200
+
±19
Rev. A | Page 13 of 40
Figure 21. THD vs. Analog Input Frequency for Various Source Impedances,
Figure 20. PSRR vs. Supply Ripple Frequency Without Supply Decoupling
–100
Figure 19. INL Error vs. Supply Voltage at 500 kSPS and 1 MSPS
–0.5
–1.0
–1.5
–2.0
–100
–50
–55
–60
–65
–70
–75
–80
–85
–90
–95
2.0
1.5
1.0
0.5
–50
–55
–60
–65
–70
–75
–80
–85
–90
–95
0
±5
0
10
100mV p-p SINE WAVE ON EACH SUPPLY
NO DECOUPLING
SINGLE-ENDED MODE
f
DIFFERENTIAL MODE
V
V
INTERNAL REFERENCE
AD8021 BETWEEN MUX
S
DD
CC
AND ADC
= 1MSPS
= 12V, V
= V
±7
INL = 1MSPS
200
DRIVE
SUPPLY VOLTAGE (V) (V
INL = 500kSPS
IN
SUPPLY RIPPLE FREQUENCY (kHz)
SS
ANALOG INPUT FREQUENCY (kHz)
PINS
= 5V
True Differential Mode
±9
= –12V
400
±11
OUT
600
100
±5V RANGE
V
INTERNAL REFERENCE
SINGLE-ENDED MODE
AD8021 BETWEEN MUX
±13
AND ADC
CC
DD
= V
INL = 500kSPS
INL = 1MSPS
V
V
= +, V
CC
DD
V
800
DRIVE
SS
= 3V
= 12V
±15
IN
= –12V
±10V RANGE
±2.5V RANGE
SS
+ PINS
= 5V
R
R
R
R
R
R
R
R
R
R
= –)
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
V
1000
CC
= 2000Ω
= 1000Ω
= 600Ω
= 100Ω
= 50Ω
= 4000Ω
= 1000Ω
= 600Ω
= 100Ω
= 50Ω
±17
= 5V
AD7329
OUT
1200
+
±19
1000