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AD7329 Datasheet(PDF) 13 Page - Analog Devices

Part No. AD7329
Description  1 MSPS, 8-Channel, Software-Selectable, True Bipolar Input, 12-Bit Plus Sign ADC
Download  40 Pages
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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AD7329 Datasheet(HTML) 13 Page - Analog Devices

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AD7329
Rev. 0 | Page 13 of 40
8k
0
–3
CODE
7k
6k
5k
4k
3k
2k
1k
–2
–1
0
1
2
3
VCC = 5V
VDD = 12V, VSS = –12V
RANGE = ±10V
10k SAMPLES
TA = 25°C
023
1201
7600
1165
11
0
Figure 16. Histogram of Codes, Single-Ended Mode
–50
–100
0
RIPPLE FREQUENCY (kHz)
–55
–60
–65
–70
–75
–80
–85
–90
–95
200
400
600
800
1000
1200
DIFFERENTIAL MODE
fIN = 50kHz
VDD = 12V, VSS = –12V
fS = 1MSPS
TA = 25°C
VCC = 5V
VCC = 3V
Figure 17. CMRR vs. Common-Mode Ripple Frequency
2.0
–2.0
SUPPLY VOLTAGE (V) (VDD = +, VSS = –)
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
±5
±7
±9
±11
±13
±15
±17
±19
±5V RANGE
VCC = VDRIVE = 5V
INTERNAL REFERENCE
SINGLE-ENDED MODE
AD8021 BETWEEN MUXOUT+
AND ADCIN+ PINS
DNL = 500kSPS
DNL = 500kSPS
DNL = 1MSPS
DNL = 1MSPS
Figure 18. DNL Error vs. Supply Voltage at 500 kSPS and 1 MSPS
2.0
–2.0
SUPPLY VOLTAGE (V) (VDD = +, VSS = –)
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
±5
±7
±9
±11
±13
±15
±17
±19
±5V RANGE
VCC = VDRIVE = 5V
INTERNAL REFERENCE
SINGLE-ENDED MODE
AD8021 BETWEEN MUXOUT+
AND ADCIN+ PINS
INL = 1MSPS
INL = 1MSPS
INL = 500kSPS
INL = 500kSPS
Figure 19. INL Error vs. Supply Voltage at 500 kSPS and 1 MSPS
–50
–100
0
1200
SUPPLY RIPPLE FREQUENCY (kHz)
–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
fS = 1MSPS
VCC = 5V
VCC = 3V
VDD = 12V
VSS = –12V
Figure 20. PSRR vs. Supply Ripple Frequency Without Supply Decoupling
–50
–100
10
1000
ANALOG INPUT FREQUENCY (kHz)
DIFFERENTIAL MODE
VDD = 12V, VSS = –12V
VCC = VDRIVE = 5V
INTERNAL REFERENCE
AD8021 BETWEEN MUXOUT
AND ADCIN PINS
100
–55
–60
–65
–70
–75
–80
–85
–90
–95
RIN = 2000Ω
RIN = 1000Ω
RIN = 600Ω
RIN = 100Ω
RIN = 50Ω
±10V RANGE
RIN = 4000Ω
RIN = 1000Ω
RIN = 600Ω
RIN = 100Ω
RIN = 50Ω
±2.5V RANGE
Figure 21. THD vs. Analog Input Frequency for Various Source Impedances,
True Differential Mode


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