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| 型號(hào)： | AD7997BRU-0 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 8-Channel, 10- and 12-Bit ADCs with I2CCompatible |
| 中文描述： | 8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20 |
| 封裝： | MO-153-AC, TSSOP-20 |
| 文件頁(yè)數(shù)： | 17/32頁(yè) |
| 文件大小： | 1056K |
| 代理商： | AD7997BRU-0 |
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AD7997/AD7998
For ac applications, removing high frequency components from
the analog input signal is recommended, by using 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.
Rev. 0 | Page 17 of 32
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 imped-
ance increases, and performance degrades. Figure 23 shows the
THD vs. the analog input signal frequency when using supply
voltages of 3 V ± 10% and 5 V ± 10%. Figure 24 shows the THD
vs. the analog input signal frequency for different source
impedances.
–100
–90
–80
–70
–50
–40
T
10
1000
INPUT FREQUENCY(kHz)
0
100
–60
V
DD
= 5.5V
V
DD
= 5V
V
DD
= 4.5V
V
DD
= 3.3V
V
DD
= 3V
V
DD
= 2.7V
Figure 23. THD vs. Analog Input Frequency for Various
Supply Voltages, F
S
= 136 kSPS, Mode 1
–100
–90
–80
–70
–50
–40
T
10
1000
INPUT FREQUENCY(kHz)
0
100
–60
R
IN
= 50
R
IN
= 10
R
IN
= 100
R
IN
= 1000
V
DD
= 5V
Figure 24. THD vs. Analog Input Frequency for Various
Source Impedances for V
DD
= 5 V, 136 kSPS, Mode 1
相關(guān)PDF資料 |
PDF描述 |
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| AD7997BRU-0REEL | 8-Channel, 10- and 12-Bit ADCs with I2CCompatible |
| AD7997BRU-1 | 8-Channel, 10- and 12-Bit ADCs with I2CCompatible |
| AD7997BRU-1REEL | 8-Channel, 10- and 12-Bit ADCs with I2CCompatible |
| AD7997BRUZ-03 | 8-Channel, 10- and 12-Bit ADCs with I2CCompatible |
| AD7997BRUZ-0REEL3 | 8-Channel, 10- and 12-Bit ADCs with I2CCompatible |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7997BRU-0REEL | 功能描述:IC ADC 10BIT 8CHAN I2C 20TSSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 位數(shù):16 采樣率（每秒）:15 數(shù)據(jù)接口:MICROWIRE?，串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:480µW 電壓電源:單電源 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:38-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:38-QFN（5x7） 包裝:帶卷 (TR) 輸入數(shù)目和類型:16 個(gè)單端，雙極；8 個(gè)差分，雙極 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
| AD7997BRU-1 | 制造商:Analog Devices 功能描述:ADC Single SAR 188ksps 10-bit Serial 20-Pin TSSOP 制造商:Rochester Electronics LLC 功能描述:8-CHANNEL, 10-BIT ADC WITH 12C ITF I.C. - Bulk |
| AD7997BRU-1REEL | 制造商:Analog Devices 功能描述:ADC Single SAR 188ksps 10-bit Serial 20-Pin TSSOP T/R 制造商:Analog Devices 功能描述:ADC SGL SAR 188KSPS 10-BIT SERL 20SSOP - Tape and Reel |
| AD7997BRU-O | 制造商:Analog Devices 功能描述: |
| AD7997BRUZ-0 | 功能描述:IC ADC 10BIT 8CHAN I2C 20TSSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個(gè)單端，單極 |
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