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參數(shù)資料
| 型號： | ADS7883SDBVR |
| 廠商： | Texas Instruments |
| 文件頁數(shù)： | 3/19頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 12-BIT 3MSPS SOT23-6 |
| 標(biāo)準(zhǔn)包裝： | 3,000 |
| 位數(shù)： | 12 |
| 采樣率（每秒）： | 3M |
| 數(shù)據(jù)接口： | 串行 |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 20mW |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | SOT-23-6 |
| 供應(yīng)商設(shè)備封裝： | SOT-23-6 |
| 包裝： | 帶卷 (TR) |
| 輸入數(shù)目和類型： | 1 個單端，單極 |
APPLICATION INFORMATION
50 W
20 pF
20 W
7 pF
VDD
IN
GND
Driving the VIN and VDD Pins
VDD
VIN
GND
CS
SDO
SCLK
10 nF
1 mF
VDD
VDD
VIN
GND
CS
SDO
SCLK
10nF
1 mF
GND
IN
OUT
3V/5V
1mF
5V/7V
REF5030/REF5050
www.ti.com ....................................................................................................................................................................................................... SLAS594 – JULY 2008
Figure 24. Typical Equivalent Sampling Circuit
The VIN input to the ADS7883 should be driven with a low impedance source. In most cases additional buffers
are not required. In cases where the source impedance exceeds 200
, using a buffer would help achieve the
rated performance of the converter. The THS4031 is a good choice for the driver amplifier buffer.
The reference voltage for the ADS7883 A/D converter is derived from the supply voltage internally. The device
offers limited low-pass filtering functionality on-chip. The supply to these converters should be driven with a low
impedance source and should be decoupled to the ground. A 1-F storage capacitor and a 10-nF decoupling
capacitor should be placed close to the device. Wide, low impedance traces should be used to connect the
capacitor to the pins of the device. The ADS7883 draws very little current from the supply lines. The supply line
can be driven by either:
Directly from the system supply.
A reference output from a low drift and low drop out reference voltage generator like the REF5030 or
REF5050. The ADS7883 can operate with a wide range of supply voltages. The actual choice of the
reference voltage generator depends upon the system. Figure 26 shows one possible application circuit.
A low-pass filtered version of the system supply followed by a buffer like the zero-drift OPA735 can also be
used in cases where the system power supply is noisy. Care should be taken to ensure that the voltage at the
VDD input does not exceed 7 V (especially during power up) to avoid damage to the converter. This can be
done easily using single supply CMOS amplifiers like the OPA735. Figure 27 shows one possible application
circuit.
Figure 25. Supply/Reference Decoupling Capacitors
Figure 26. Using the REF5030/REF5050 Reference
Copyright 2008, Texas Instruments Incorporated
11
Product Folder Link(s): ADS7883
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADS7883SDBVT | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 2.7V-5.5V 12B 3MSPS Serial ADC 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 |
| ADS7884 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:12-BIT, 3-MSPS, MICROPOWER, MINIATURE SAR ANALOG-TO-DIGITAL CONVERTER |
| ADS7884EVM | 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 ADS7884 Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
| ADS7884SDBVR | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 2.7V-5.5V 10B 3MSPS Serial ADC 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 |
| ADS7884SDBVT | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 2.7V-5.5V 10B 3MSPS Serial ADC 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 |
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