参数资料
型号: EVAL-AD7920CBZ
厂商: Analog Devices Inc
文件页数: 2/24页
文件大小: 0K
描述: BOARD EVALUATION FOR AD7920
标准包装: 1
ADC 的数量: 1
位数: 12
采样率(每秒): 250k
数据接口: 串行
输入范围: 0 ~ Vdd
在以下条件下的电源(标准): 12.5mW @ 250kSPS,5V
工作温度: -40°C ~ 85°C
已用 IC / 零件: AD7920
已供物品: 板,CD
相关产品: AD7920BKSZ-500RL7TR-ND - IC ADC 12BIT SRL 250KSPS SC70-6
AD7920AKSZ-REEL7-ND - IC ADC 12BIT SRL 250KSPS SC70-6
AD7920AKSZ-500RL7TR-ND - IC ADC 12BIT SRL 250KSPS SC70-6
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AD7910/AD7920
Rev. C | Page 10 of 24
TYPICAL PERFORMANCE CHARACTERISTICS
Figure 7 and Figure 8 show a typical FFT plot for the AD7920 and
AD7910, respectively, at a 250 kSPS sampling rate and a 100 kHz
input frequency.
Figure 9 shows the signal-to-(noise + distortion) ratio performance
vs. input frequency for various supply voltages while sampling at
250 kSPS with an SCLK frequency of 5 MHz for the AD7920.
Figure 10 and Figure 11 show typical INL and DNL performance
for the AD7920.
Figure 12 shows a graph of the total harmonic distortion vs. analog
input frequency for different source impedances when using a
supply voltage of 3.6 V and sampling at a rate of 250 kSPS. See the
Figure 13 shows a graph of the total harmonic distortion vs.
analog input signal frequency for various supply voltages while
sampling at 250 kSPS with an SCLK frequency of 5 MHz.
FREQUENCY (kHz)
–5
–55
–115
0
125
25
S
NR
(dB)
50
75
100
–15
–35
–75
–95
8192 POINT FFT
VDD = 2.7V
fSAMPLE = 250kSPS
fIN = 100kHz
SINAD = 72.05dB
THD = –82.87dB
SFDR = –87.24dB
02976-007
Figure 7. AD7920 Dynamic Performance at 250 kSPS
FREQUENCY (kHz)
–45
–105
S
NR
(dB)
–5
15
–25
–65
–85
0
125
25
50
75
100
02976-008
8192 POINT FFT
VDD = 2.35V
fSAMPLE = 250kSPS
fIN = 100kHz
SINAD = 61.67dB
THD = –79.59dB
SFDR = –82.93dB
Figure 8. AD7910 Dynamic Performance at 250 kSPS
FREQUENCY (kHz)
–72.0
10
1000
S
INAD
(dB)
100
–73.0
–73.5
VDD = 5.25V
VDD = 2.35V
VDD = 2.7V
VDD = 4.75V V
DD = 3.6V
–72.5
–71.0
–71.5
02976-009
Figure 9. AD7920 SINAD vs. Input Frequency at 250 kSPS
CODE
1.0
0.4
–0.2
0
1024
INL
E
RROR
(LS
B
)
512
0.8
0.6
0.2
0
–0.4
–0.6
–0.8
–1.0
1536
2048
2560
3072
3584
4096
VDD = 2.35V
TEMP = 25
°C
fSAMPLE = 250kSPS
02976-010
Figure 10. AD7920 INL Performance
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