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參數(shù)資料
| 型號： | AD7457BRT-REEL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | Low Power, Pseudo Differential, 100 kSPS 12-Bit ADC in an 8-Lead SOT-23 |
| 中文描述： | 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8 |
| 封裝： | MO-178BA, SOT-23, 8 PIN |
| 文件頁數(shù)： | 19/20頁 |
| 文件大小： | 532K |
| 代理商： | AD7457BRT-REEL7 |
AD7457
Rev. A | Page 8 of 20
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, fS = 100 kSPS, fSCLK = 10 MHz, VDD = 2.7 V to 5.25 V, VREF = 2.5 V, unless otherwise noted.
FREQUENCY (kHz)
65
10
S
INAD
(dB)
20
50
70
75
VDD = 3V
30
40
VDD = 5V
03157-0-014
Figure 5. SINAD vs. Analog Input Frequency for VDD = 3 V and 5 V
0
–20
–40
–80
–60
–120
–100
–140
03157-0-015
SUPPLY RIPPLE FREQUENCY (kHz)
0
100
200
300
400
500
P
S
RR
(dB)
900
1000
VDD = 5V
VDD = 3V
100mV p-p SINE WAVE ON VDD
NO DECOUPLING ON VDD
600
700
800
Figure 6. PSRR vs. Supply Ripple Frequency Without Supply Decoupling
FREQUENCY (kHz)
S
NR
(dB)
0
–20
–40
–80
–60
–120
–100
–140
0
100
8192 POINT FFT
fSAMPLE = 100kSPS
fIN = 30kHz
SINAD = 71dB
THD = –82dB
SFDR = –83dB
03157-0-016
30
50
Figure 7. Dynamic Performance for VDD = 5 V
CODE
DNL
E
RROR
(LS
B
)
1.0
0.8
0.6
0.2
0.4
–0.2
–0.4
–0.6
–0.8
0
–1.0
0
1024
3072
2048
4096
03157-0-017
Figure 8. Typical DNL for the AD7457 for VDD = 5 V
CODE
INL
E
RROR
(LS
B
)
1.0
0.8
0.6
0.2
0.4
–0.2
–0.4
–0.6
–0.8
0
–1.0
0
1024
3072
2048
4096
03157-0-018
Figure 9. Typical INL for the AD7457 for VDD = 5 V
CODES
0
2046
2047
2048
2049
2050
2051
27 CODES
24 CODES
9949
CODES
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
03157-0-019
COUNTS
Figure 10. Histogram of 10,000 Conversions of a DC Input
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