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参数资料
| 型号： | ADC08351CIMTC |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | ADC |
| 英文描述： | 8-Bit, 42 MSPS, 40 mW A/D Converter |
| 中文描述： | 1-CH 8-BIT RESISTANCE LADDER ADC, PARALLEL ACCESS, PDSO20 |
| 封装： | TSSOP-20 |
| 文件页数： | 14/15页 |
| 文件大小： | 492K |
| 代理商： | ADC08351CIMTC |
Applications Information
(Continued)
inject noise into the system and may be difficult to detect with
an oscilloscope. A resistor of about 50
to 100
in series
with the offending digital input will usually eliminate the prob-
lem.
Care should be taken not to overdrive the inputs of the
ADC08351 (or any device) with a device that is powered
from supplies outside the range of the ADC08351 supply.
Such practice may lead to conversion inaccuracies and even
to device damage.
Attempting to drive a high capacitance digital data bus.
The more capacitance the output drivers have to charge for
each conversion, the more instantaneous digital current is
required from V
and DGND. These large charging current
spikes can couple into the analog section, degrading dy-
namic performance. While adequate bypassing and main-
taining separate analog and digital ground planes will reduce
this problem on the board, this coupling can still occur on the
ADC08351 die. Buffering the digital data outputs (with a
74ACQ541, for example) may be necessary if the data bus
to be driven is heavily loaded.
Dynamic performance can also be improved by adding se-
ries resistors at each digital output, reducing the energy
coupled back into the converter output pins by limiting the
output slew rate. A reasonable value for these resistors is
about 47
.
Using an inadequate amplifier to drive the analog input.
As explained in Section 2.0, the capacitance seen at the in-
put alternates between 4 pF and 11 pF with the clock. This
dynamic capacitance is more difficult to drive than a fixed ca-
pacitance, so care should be taken in choosing a driving de-
vice. The CLC409, CLC440, LM6152, LM6154, LM6181 and
LM6182 are good devices for driving the ADC08351. Also,
an amplifier with insufficient gain-bandwidth may limit the
overall frequency response of the overall circuit.
Using an operational amplifier in an insufficient gain
configuration to drive the analog input.
Operational am-
plifiers, while some may be unity gain stable, generally ex-
hibit more distortion at low in-circuit gains than at higher
gains.
Using a clock source with excessive jitter, using exces-
sively long clock signal trace, or having other signals
coupled to the clock signal trace.
This will cause the sam-
pling interval to vary, causing excessive output noise and a
reduction in SNR performance. Simple gates with RC timing
is generally inadequate.
Not considering the timing relationships, especially t
.
Timing is always important and gets more critical with higher
speeds. If the output data is latched or looked at when that
data is in transition, you may see excessive noise and distor-
tion of the output signal.
A
www.national.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADC08351CIMTC/NOPB | 功能描述:IC ADC 8BIT 20-TSSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 位数:12 采样率（每秒）:3M 数据接口:- 转换器数目:- 功率耗散（最大）:- 电压电源:- 工作温度:- 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-23-6 包装:带卷 (TR) 输入数目和类型:- |
| ADC08351CIMTCE/NOPB | 制造商:Texas Instruments 功能描述: |
| ADC08351CIMTCX | 功能描述:模数转换器 - 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 |
| ADC08351CIMTCX/NOPB | 功能描述:模数转换器 - 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 |
| ADC08351EVAL | 功能描述:EVALUATION BOARD FOR ADC08351 RoHS:是 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 传感器类型:CMOS 成像，彩色（RGB） 传感范围:WVGA 接口:I²C 灵敏度:60 fps 电源电压:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相关产品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
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