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参数资料
| 型号： | TLV1570IDW |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | ADC |
| 英文描述： | 8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20 |
| 封装： | GREEN, SOIC-20 |
| 文件页数： | 27/32页 |
| 文件大小： | 634K |
| 代理商： | TLV1570IDW |
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TLV1570
2.7 V TO 5.5 V 8-CHANNEL 10-BIT 1.25-MSPS
SERIAL ANALOG-TO-DIGITAL CONVERTER
SLAS169B – DECEMBER 1997– REVISED OCTOBER 2000
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
sampling frequency, fs
The TLV1570 requires 16 SCLKs for each sampling and conversion, therefore the equivalent maximum
sampling frequency achievable with a given SCLK frequency is:
fs(MAX) = (1/16)fSCLK
power down
The TLV1570 offers two different power-down options. With autopower-down mode enabled, (DI4=0) the ADC
proceeds to power down if FS is not detected on the 17th falling SCLK edge of a cycle (a cycle starts with FS
being detected on a falling edge of SCLK) in DSP mode and after 16 SCLKs in
C mode. The TLV1570 will
recover from auto power down when FS goes high in DSP mode or when the next SCLK comes in
C mode.
In the case of software power down, the ADC goes to the software power-down state one cycle after CR.DI15
is set to 1. Unlike autopower down which recovers in 1 SCLK, software power down takes 16 SCLKs to recover.
DESCRIPTION
AUTOPOWER DOWN
SOFTWARE
POWERDOWN
CS = DVDD
Maximum power down dissipation current
300
A
10
A
Comparator
Power down
Powerdown
Clock buffer
Power down
Powerdown
Reference
Active
Powerdown
Register
Not saved
Minimum power down time
1 SCLK
1
s
Minimum resume time
1 SCLK
800 ns
Power down
DSP mode
No FS present one SCLK after previous conversion completed
CR.DI15 set to 1
Power down
Microprocessor mode (FS = 1)
SCLK stopped after previous conversion completed
CR.DI15 set to 1
Power up
DSP mode
FS present
CR.DI15 set to 1
Power up
Microprocessor mode (FS = 1)
SCLK present
CR.DI15 set to 1
Only in DSP mode is input buffer of clock in power-down mode.
The software power down enable/disable bit is not acted until the start of the next cycle (see section configuring the TLV1570 for more information.
configuring the TLV1570
The TLV1570 is to be configured by writing the control bits to SDIN. The configuration will not take affect until
the next cycle. A new configuration is needed for each conversion. Once the channel input and other options
are selected, the conversion takes place in the next cycle. Conversion results are shifted out as conversion
progresses ( see Figure 2).
17
32
One Cycle
Second Cycle
ts
tconv
ts
tconv
Result 0
Result 1
Configure Data 1
Configure Data 2
SCLK
SDOUT
SDIN
Figure 2. TLV1570 Configuration Cycle Timing
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| TLV1570CPW | 8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20 |
| TLV1570IDWR | 8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20 |
| TLV1570IPWRG4 | 8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20 |
| TLV1570CDWR | 8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20 |
| TLV1570IPWG4 | 8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TLV1570IDWG4 | 功能描述:模数转换器 - ADC 10-Bit 1.25 MSPS 8-Ch DSP RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| TLV1570IDWR | 制造商:Texas Instruments 功能描述: |
| TLV1570IPW | 功能描述:模数转换器 - ADC 10bit 1.25MSPS Ser RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| TLV1570IPWG4 | 功能描述:模数转换器 - ADC 10-Bit 1.25 MSPS 8-Ch DSP RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| TLV1570IPWR | 功能描述:模数转换器 - ADC 10-Bit 1.25 MSPS 8-Ch DSP RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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