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| 型号： | AD7992BRMZ-1REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 8/29页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT 2CHAN I2C 10MSOP |
| 标准包装： | 3,000 |
| 位数： | 12 |
| 采样率（每秒）： | 79k |
| 数据接口： | I²C，串行 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 2.2mW |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 2 个单端，单极 |
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AD7992
Rev. 0 | Page 15 of 28
For ac applications, removing high frequency components from
the analog input signal is recommended by use of an RC band-
pass filter on the relevant analog input pin. In applications
where harmonic distortion and signal-to-noise ratio are critical,
the analog input should be driven from a low impedance
source. Large source impedances significantly affect the ac
performance of the ADC. This may necessitate the use of an
input buffer amplifier. The choice of the op amp is a function
of the particular application.
When no amplifier is used to drive the analog input, the source
impedance should be limited to low values. The maximum
source impedance depends on the amount of total harmonic
distortion (THD) that can be tolerated. THD increases as the
source impedance increases, and performance degrades.
Figure 22 shows the THD vs. the analog input signal frequency
when using supply voltages of 3 V ± 10% and 5 V ± 10%.
Figure 23 shows the THD vs. the analog input signal frequency
for different source impedances.
–100
–95
–90
–85
–80
–75
–70
–65
–60
–55
–50
10
100
INPUT FREQUENCY (kHz)
THD
(dB)
1
VREF = 2.5V
VDD = 2.7V
VDD = 3.0V
VDD = 3.3V
VDD = 5.5V
VDD = 5.0V
VDD = 4.5V
03263-0-022
Figure 22. THD vs. Analog Input Frequency for Various
Supply Voltages, FS = 136 kSPS, Mode 1
–100
–90
–80
–70
–60
–50
–40
1
10
100
INPUT FREQUENCY (kHz)
THD
(dB)
VDD = 5.5V
VREF = 2.5V
RSOURCE = 1k
RSOURCE = 100
RSOURCE = 0
RSOURCE = 10
03263-0-023
RSOURCE = 50
Figure 23. THD vs. Analog Input Frequency for Various
Source Impedances for VDD = 5.5 V, 136 kSPS, Mode 1
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相关代理商/技术参数 |
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|---|---|
| AD7993 | 制造商:AD 制造商全称:Analog Devices 功能描述:4-Channel, 12-/10-Bit ADCs with I2C Compatible Interface in 16-Lead TSSOP |
| AD7993-0 | 制造商:AD 制造商全称:Analog Devices 功能描述:4-Channel, 10- and 12-Bit ADCs with I2C Compatible Interface in 16-Lead TSSOP |
| AD7993-1 | 制造商:AD 制造商全称:Analog Devices 功能描述:4-Channel, 10- and 12-Bit ADCs with I2C Compatible Interface in 16-Lead TSSOP |
| AD7993BRU | 制造商:Analog Devices 功能描述:ADC SGL SAR 188KSPS 10-BIT SERL 16TSSOP - Bulk |
| AD7993BRU-0 | 功能描述:IC ADC 10BIT 4CH W/I2C 16-TSSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
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