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參數(shù)資料
| 型號： | ADS820U |
| 英文描述： | 10-Bit, 20MHz Sampling ANALOG-TO-DIGITAL CONVERTER |
| 中文描述： | 10位，20MHz的采樣模擬數(shù)字轉(zhuǎn)換器 |
| 文件頁數(shù)： | 12/14頁 |
| 文件大小： | 295K |
| 代理商： | ADS820U |
12
ADS820
604
301
301
301
604
49.9
301
604
2.49k
2.49k
+2.25V
OPA642
OPA130
301
0.1μF
OPA642
OPA642
+5V
–5V
+5V
(2)
+5V
–5V
+5V
+5V
+5V
–5V
BAS16
(1)
BAS16
(1)
301
24.9
Input Level
Shift Buffer
Optional
High Impedance
Input Amplifier
DC-Coupled
Input Signal
26 IN
22 CM
27 IN
ADS820
NOTES: (1) A Philips BAS16 diode or equivalent may be used.
(2) Supply bypassing not shown. (3) OPA620 or OPA650 may be
substituted. See "Driving the ADS820" section.
22pF
22pF
604
0.1μF
0.1μF
(3)
(3)
22
26
27
CM
IN
IN
ADS820
0.1μF
Single-Ended
Input Signal
Full Scale = +0.25V to +4.25V with internal references.
FIGURE 8. Single-Ended Input Connection.
22pF
The ADS820 can also be configured with a single-ended
input full scale range of +0.25V to +4.25V by tying the
complementary input to the common-mode reference voltage
as shown in Figure 8. This configuration will result in
increased even-order harmonics, especially at higher input
frequencies. However, this tradeoff may be quite acceptable
for time-domain applications. The driving amplifier must
give adequate performance with a +0.25V to +4.25V output
swing in this case.
FIGURE 6. A Low Distortion DC-Coupled, Single-Ended to Differential Input Driver Circuit.
50
1k
OTA
OPA660
OPA660
+1
+1
OPA130
1nF
OTA
+5V
–5V
–5V
+5V
DC-Coupled
Input Signal
27 IN
22 CM
26 IN
ADS820
NOTE: Power supplies and bypassing not shown. The measured SNR performance with 12.5MHz input signal is 57dB with this driver circuit.
1k
500
500
1k
200
243
200
3
B
2
3
2
8
5
C
6
6
1
8
5
C
E
E
3
2
7
4
B
200
C
1
15pF
22pF
22pF
0.1μF
2k
V
OUT
–5V
243
FIGURE 7. A Wideband DC-Coupled, Single-Ended to Differential Input Driver Circuit.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADS820U/1K | 功能描述:視頻模擬/數(shù)字化轉(zhuǎn)換器集成電路 10-Bit 20 MSPS SE/ Diff Input RoHS:否 制造商:Texas Instruments 輸入信號類型:Differential 轉(zhuǎn)換器數(shù)量:1 ADC 輸入端數(shù)量:4 轉(zhuǎn)換速率:3 Gbps 分辨率:8 bit 結(jié)構(gòu): 輸入電壓:3.3 V 接口類型:SPI 信噪比: 電壓參考: 電源電壓-最大:3.45 V 電源電壓-最小:3.15 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TCSP-48 封裝:Reel |
| ADS820U/1KG4 | 功能描述:視頻模擬/數(shù)字化轉(zhuǎn)換器集成電路 10-Bit 20 MSPS SE/ Diff Input RoHS:否 制造商:Texas Instruments 輸入信號類型:Differential 轉(zhuǎn)換器數(shù)量:1 ADC 輸入端數(shù)量:4 轉(zhuǎn)換速率:3 Gbps 分辨率:8 bit 結(jié)構(gòu): 輸入電壓:3.3 V 接口類型:SPI 信噪比: 電壓參考: 電源電壓-最大:3.45 V 電源電壓-最小:3.15 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TCSP-48 封裝:Reel |
| ADS820UG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10-Bit 20 MSPS SE/ Diff Input RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS821 | 制造商:BB 制造商全稱:BB 功能描述:10-Bit, 40MHz Sampling ANALOG-TO-DIGITAL CONVERTER |
| ADS821E | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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