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參數(shù)資料
| 型號： | TLV1571EVM |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | TLV1571 Evaluation Module(TLV1571評估板) |
| 中文描述： | TLV1571評估模塊（TLV1571評估板） |
| 文件頁數(shù)： | 11/50頁 |
| 文件大?。?/td> | 1324K |
| 代理商： | TLV1571EVM |
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ADC System Discussion
1-3
EVM Overview
1.2
ADC System Discussion
This printed wiring board (PWB) EVM supports three analog-to-digital
converters (ADCs).
TLV1578
TLV1571
TLV571
From a physical and functional viewpoint, the significant distinction between
these parts is that the TLV1578 features an 8
–
1 multiplexer (MUX). This allows
selection of the analog-input channel to be digitized. The TLV1571 and
TLV571 do not provide a MUX.
General features of these ADCs are given in Table 1
–
2.
Table 1
–
2.General ADC Features
Device
Resolution
Channels
Sweep
Mode
Self-Test
Output
Throughput
at 5 V
Available
Package
EVM Order
Number
TLV1578
10 bit
8
Yes
Yes
1.25 MSPS
DA
TLV1578
TLV1571
10 bit
1
No
Yes
1.25 MSPS
DW/PW
TLV1571
TLV571
8 bit
1
No
No
1.25 MSPS
DW/PW
TLV571
1.2.1
ADC
This successive approximation scheme relies on charge redistribution to
count and weigh each bit from MSB to LSB. Each bit of the ADC has a
corresponding capacitor. The procedure involves successively comparing the
charge on each capacitor to a reference value. As the process develops, the
digital bit corresponding to each capacitor is either set or cleared.
1.2.2
DAC
A 12-bit digital-to-analog converter (DAC) present on the EVM can be used
either as an independent device (via either the DSP starter kit (DSK) interface
or the peripheral component interconnect (PCI) interface), or can be arranged
to operate in synchronization with the ADC.
1.2.3
Signal Conditioning
Signal conditioning is available prior to conversion. The conditioning circuit
consists of an operational amplifier in a noninverting configuration. The
nominal gain for the circuit is one, but you can change it. The slew rate of the
amplifier should be sufficiently high (25 V/
μ
S) to respond to fast-changing
signals such as square-wave inputs.
1.2.4
Control/Interface
The control signals can be derived from either a DSK/microprocessor or a
dedicated PCI-based DSP. The signals from either source are the same. The
decision regarding which host system to use is left to the discretion of the user.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TLV1571IDW | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10bit 1.2 MSPS PA 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 |
| TLV1571IDWG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10bit 1.2 MSPS PA 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 |
| TLV1571IPW | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10bit 1.2 MSPS PA 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 |
| TLV1571IPWG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 1-Ch 10-Bit 1.25MSPS 8-Ch DSP/SPI 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 |
| TLV1572 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2.7 V TO 5.5 V, 10-BIT, 1.25 MSPS SERIAL ANALOG-TO-DIGITAL CONVERTER WITH AUTO-POWERDOWN |
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