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| 型号： | ADS62P44IRGCT |
| 厂商： | Texas Instruments |
| 文件页数： | 47/78页 |
| 文件大小： | 0K |
| 描述： | IC ADC 14BIT DUAL 105MSPS 64VQFN |
| 产品培训模块： | Data Converter Basics |
| 标准包装： | 1 |
| 位数： | 14 |
| 采样率（每秒）： | 105M |
| 数据接口： | 串行，并联 |
| 转换器数目： | 2 |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-VFQFN 裸露焊盘 |
| 供应商设备封装： | 64-VQFN 裸露焊盘（9x9） |
| 包装： | 标准包装 |
| 输入数目和类型： | 2 个差分，单极 |
| 其它名称： | 296-23137-6 |
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165 mA
Fs
125 MSPS
S0165-05
VCM
REFM
REFP
INTREF
EXTREF
1kW
4kW
Internal
Reference
ADS62P4x
SLAS561C
– JULY 2007 – REVISED FEBRUARY 2012
Input Common-Mode
To ensure a low-noise common-mode reference, the VCM pin is filtered with a 0.1-
μF low-inductance capacitor
connected to ground. The VCM pin is designed to directly drive the ADC inputs. The input stage of the ADC
sinks a common-mode current in the order of 165
μA (at 125 MSPS). Equation 1 describes the dependency of
the common-mode current and the sampling frequency.
(1)
This equation helps to design the output capability and impedance of the VCM driving circuit accordingly.
REFERENCE
ADS62P4X has built-in internal references REFP and REFM, requiring no external components. Design schemes
are used to linearize the converter load seen by the references; this and the on-chip integration of the requisite
reference capacitors eliminates the need for external decoupling. The full-scale input range of the converter can
be controlled in the external reference mode as explained below. The internal or external reference modes can
be selected by programming the serial interface register bit ( REF).
Figure 89. Reference Section
Internal Reference
When the device is in internal reference mode, the REFP and REFM voltages are generated internally.
Common-mode voltage (1.5 V nominal) is output on VCM pin, which can be used to externally bias the analog
input pins.
External Reference
When the device is in external reference mode, the VCM acts as a reference input pin. The voltage forced on the
VCM pin is buffered and gained by 1.33 internally, generating the REFP and REFM voltages. The differential
input voltage corresponding to full-scale is given in Equation 2.
Full-scale differential input pp = (Voltage forced on VCM)
× 1.33
(2)
In this mode, the 1.5-V common-mode voltage to bias the input pins has to be generated externally.
Copyright
2007–2012, Texas Instruments Incorporated
51
Product Folder Link(s): ADS62P45, ADS62P44 ADS62P43, ADS62P42
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADS62P44IRGCTG4 | 功能描述:模数转换器 - ADC DUAL 14B 105MSPS Para ADC 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 |
| ADS62P44RGC | 制造商:TI 制造商全称:Texas Instruments 功能描述:Dual Channel 14-Bit, 125/105/80/65 MSPS ADC with Parallel CMOS/DDR LVDS outputs |
| ADS62P45 | 制造商:TI 制造商全称:Texas Instruments 功能描述:Dual Channel 14-Bit, 125/105/80/65 MSPS ADC with Parallel CMOS/DDR LVDS outputs |
| ADS62P45_08 | 制造商:TI 制造商全称:Texas Instruments 功能描述:DUAL CHANNEL, 14-BITS, 125/105/80/65 MSPS ADC WITH DDR LVDS/CMOS OUTPUTS |
| ADS62P45EVM | 功能描述:数据转换 IC 开发工具 ADS62P25 Eval Mod RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
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