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参数资料
| 型号： | TLV1562IDWR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | ADC |
| 英文描述： | 4-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28 |
| 封装： | 1.27 MM PITCH, GREEN, SOIC-28 |
| 文件页数： | 14/41页 |
| 文件大小： | 600K |
| 代理商： | TLV1562IDWR |
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TLV1562
2.7 V TO 5.5 V, HIGH-SPEED LOW-POWER RECONFIGURABLE ANALOG-TO-DIGITAL
CONVERTER WITH 4-INPUT, DUAL S/H, PARALLEL INTERFACE, AND POWER DOWN
SLAS162 – SEPTEMBER 1998
21
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Full-Scale Error
(Before Calibrayion)
Ideal Transfer Function
Transfer Function Before
Mid-Scale Calibration
Mid-Scale Error
(Before Calibration)
Mid-Scale Error
(After Calibration)
Analog Input
REFP
V-Mid (REFCM)
Zero-Scale Error
(Before Calibration)
Zero-Scale Error
(After Calibration)
Full-Scale Error
(After Calibration)
Transfer Function After
Mid-Scale Calibration
REFM
Zero Scale
Mid Scale
Full Scale
Code Output
Figure 16. Mid-Scale Error Calibration
resume normal conversion from mid-scale error calibration modes
A follow on write operation sets CR0.(7,6) to 00 which resumes the normal conversion mode. Typically
mid-scale error calibration needs to be performed only once after power up. If however the operation mode is
changed from single ended to differential, then preferably mid-scale error calibration should be performed
again.
The user writes a bit to enable mid-scale error calibration. Inputs to the ADC are internally shorted therefore
the offset value can be converted to a digital word. The result (a digital word representing the offset) is stored
in a latch. This offset value is then subtracted from the digital output of all conversions except when in mid-scale
error calibration mode.
system design consideration regarding to mid-scale error calibration
Mid-scale error calibration may limit the dynamic range of the ADC. If the offset is negative and has a magnitude
x, then the range of the converter codes is x to 1023. If the offset is positive and has a magnitude of x, then the
range of converter codes is 1 to 1023 –x. Thus the ADCs dynamic range is reduced by x (say x = 20 codes) on
either side of the range effectively with mid-scale error calibration. However this should not be a limitation for
most users.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TLV1562IDWRG4 | 功能描述:模数转换器 - ADC 10-Bit 2 MSPS Quad Channel 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 |
| TLV1562IPW | 功能描述:模数转换器 - ADC 10bit Programmable 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 |
| TLV1562IPWG4 | 功能描述:模数转换器 - ADC 10-Bit 2 MSPS Quad Channel 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 |
| TLV1570 | 制造商:TI 制造商全称:Texas Instruments 功能描述:2.7 V TO 5.5 V 8-CHANNEL 10-BIT 1.25-MSPS SERIAL ANALOG-TO-DIGITAL CONVERTER |
| TLV1570CDW | 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 |
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