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| 型号： | ADS6243IRGZT |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | ADC |
| 英文描述： | 2-CH 14-BIT PROPRIETARY METHOD ADC, SERIAL ACCESS, PQCC48 |
| 封装： | 7 X 7 MM, GREEN, PLASTIC, QFN-48 |
| 文件页数： | 36/76页 |
| 文件大小： | 3497K |
| 代理商： | ADS6243IRGZT |
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www.ti.com
APPLICATION INFORMATION
THEORY OF OPERATION
ANALOG INPUT
INP
INM
25 W
RCR Filter
50 W
3.2 pF
C
1pF
par2
C
1pF
par2
L
3nH
pkg
L
3nH
pkg
C
2pF
bond
C
2pF
bond
R
200
esr
W
R
200
esr
W
C
0.8 pF
par1
Sampling
Switch
Sampling
Switch
Sampling
Capacitor
Sampling
Capacitor
R
15
on
W
R
15
on
W
R
10
on
W
C
4.0 pF
samp
C
4.0 pF
samp
S0237-01
SLAS542A – MAY 2007 – REVISED JULY 2007
The ADS6245/ADS6244/ADS6243 (ADS624X) is a family of dual channel, 14-bit pipeline ADC based on
switched capacitor architecture in CMOS technology.
The conversion is initiated simultaneously by all the four channels at the rising edge of the external input clock.
After the input signals are captured by the sample and hold circuit of each channel, the samples are sequentially
converted by a series of low resolution stages. The stage outputs are combined in a digital correction logic block
to form the final 14-bit word with a latency of 12 clock cycles. The 14-bit word of each channel is serialized and
output as LVDS levels. In addition to the data streams, a bit clock and frame clock are also output. The frame
clock is aligned with the 14-bit word boundary.
The analog input consists of a switched-capacitor based differential sample and hold architecture, shown in
Figure 82. This differential topology results in very good AC performance even for high input frequencies. The
INP and INM pins have to be externally biased around a common-mode voltage of 1.5 V, available on VCM pin
13. For a full-scale differential input, each input pin INP, INM has to swing symmetrically between VCM + 0.5 V
and VCM – 0.5 V, resulting in a 2-Vpp differential input swing. The maximum swing is determined by the internal
reference voltages REFP (2.0V nominal) and REFM (1.0 V, nominal). The sampling circuit has a 3 dB bandwidth
that extends up to 500 MHz (Figure 83, shown by the transfer function from the analog input pins to the voltage
across the sampling capacitors, TF_ADC).
Figure 82. Input Sampling Circuit
Copyright 2007, Texas Instruments Incorporated
41
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADS6243IRGZTG4 | 功能描述:模数转换器 - ADC Dual 14B 80MSPS 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 |
| ADS6244 | 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 SERIAL LVDS OUTPUTS |
| ADS6244EVM | 功能描述:数据转换 IC 开发工具 ADS6244 Evaluation Module 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 |
| ADS6244IRGZ25 | 功能描述:模数转换器 - ADC Dual 14B 105MSPS 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 |
| ADS6244IRGZR | 功能描述:模数转换器 - ADC Dual 14B 105MSPS 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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