参数资料
型号: AD7720BRUZ
厂商: Analog Devices Inc
文件页数: 15/16页
文件大小: 0K
描述: IC MODULATOR SIGMA-DELTA 28TSSOP
标准包装: 50
位数: 16
采样率(每秒): 12.5M
数据接口: 并联
转换器数目: 1
功率耗散(最大): 215mW
电压电源: 模拟和数字
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 28-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 28-TSSOP
包装: 管件
输入数目和类型: 1 个差分,单极;1 个差分,双极
(AVDD = DVDD = 5.0 V, TA = +25 C; CLKIN = 12.5 MHz, AIN = 20 kHz, Bipolar Mode; VIN(+) = 0 V to 2.5 V, VIN(–) = 1.25 V unless otherwise
noted)
AD7720–Typical Characteristics
–8–
REV. 0
INPUT LEVEL – dB
dB
110
100
50
–40
–30
0
–20
–10
90
80
70
60
SFDR
S/ (N+D)
Figure 5. S/(N+D) and SFDR vs.
Analog Input Level
INPUT FREQUENCY – kHz
dB
–85
–90
–115
0
20
100
40
60
80
–95
–100
–105
–110
THD
SNR
SFDR
VIN (+) = VIN(–) = 1.25Vpk–pk
VCM = 2.5V
Figure 8. SNR, THD, and SFDR vs.
Input Frequency
TEMPERATURE –
°C
dB
–94
–116
–50
–25
100
025
50
75
–96
–108
–110
–112
–114
–100
–102
–106
–104
–98
THD
3RD
4TH
2ND
Figure 11. THD vs. Temperature
OUTPUT DATA RATE – kSPS
dB
84
92
85
88
89
90
91
86
87
0
50
300
100
150
200
250
AIN = 1/5
BW
Figure 6. S/(N+D) vs. Output Sample
Rate
OUTPUT DATA RATE – kSPS
dB
84
92
85
88
89
90
91
86
87
0
50
300
100
150
200
250
AIN = 1/5
BW
VIN (+) = VIN(–) = 1.25Vpk–pk
VCM = 2.5V
Figure 9. S/(N+D) vs. Output Sample
Rate
CODES
FREQUENCY
OF
OCCURENCE
5000
0
n–3
n–2
n+3
n–1
n
n+1
n+2
4500
2000
1500
1000
500
4000
3500
2500
3000
VIN(+) = VIN(–)
CLKIN = 12.5MHz
8k SAMPLES
Figure 12. Histogram of Output Codes
with DC Input
INPUT FREQUENCY – kHz
dB
–85
–90
–115
0
20
100
40
60
80
–95
–100
–105
–110
SNR
SFDR
THD
Figure 7. SNR, THD, and SFDR vs.
Input Frequency
TEMPERATURE –
°C
92.0
91.5
88.0
–50
0
100
50
90.0
89.5
88.5
89.0
91.0
90.5
dB
Figure 10. SNR vs. Temperature
CODE
DNL
ERROR
LSB
1.0
0.8
–1.0
0
20000
65535
40000
–0.4
–0.8
–0.6
0
–0.2
0.6
0.2
0.4
Figure 13. Differential Nonlinearity
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