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| 型号： | THS1041IPWR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | ADC |
| 英文描述： | 1-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28 |
| 封装： | GREEN, PLASTIC, TSSOP-28 |
| 文件页数： | 27/41页 |
| 文件大小： | 810K |
| 代理商： | THS1041IPWR |
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THS1041
SLAS289C OCTOBER 2001 REVISED OCTOBER 2004
33
www.ti.com
APPLICATION INFORMATION
CLAMPOUT decoupling (when used as dc bias source)
When using CLAMPOUT as a dc biasing reference (e.g., MODE = AVDD), the CLAMPOUT pin should be
decoupled to the circuit board’s analog ground plane close to the THS1041 AGND pin via a 1-
F capacitor and
a 0.1-
F ceramic capacitor.
supply decoupling
The analog (AVDD, AGND) and digital (DVDD, DGND) power supplies to the THS1041 should be separately
decoupled for best performance. Each supply needs at least a 10-
F electrolytic or tantalum capacitor (as a
charge reservoir) and a 100-nF ceramic type capacitor placed as close as possible to the respective pins (to
suppress spikes and supply noise).
digital output loading and circuit board layout
The THS1041 outputs are capable of driving rail-to-rail with up to 10 pF of load per pin at 40-MHz clock frequency
and 3-V digital supply. Minimizing the load on the outputs improves THS1041 signal-to-noise performance by
reducing the switching noise coupling from the THS1041 output buffers to the internal analog circuits. The
output load capacitance can be minimized by buffering the THS1041 digital outputs with a low input capacitance
buffer placed as close to the output pins as physically possible, and by using the shortest possible tracks
between the THS1041 and this buffer. Inserting small resistors in the range 100
to 300 between the
THS1041 I/O outputs and their loads can help minimize the output-related noise in noise-critical applications.
Noise levels at the output buffers, which may affect the analog circuits within THS1041, increase with the digital
supply voltage. Where possible, consider using the lowest DVDD that the application can tolerate.
Use good layout practices when designing the application PCB to ensure that any off-chip return currents from
the THS1041 digital outputs (and any other digital circuits on the PCB) do not return via the supplies to any
sensitive analog circuits. The THS1041 should be soldered directly to the PCB for best performance. Socketing
the device degrades performance by adding parasitic socket inductance and capacitance to all pins.
user tips for obtaining best performance from the THS1041
D Choose differential input mode for best distortion performance.
D Choose a 2-V ADC input span for best noise performance.
D Choose a 1-V ADC input span for best distortion performance.
D Drive the clock input CLK from a low-jitter, fast logic stage, with a well-decoupled power supply and short
PCB traces.
D Use a small RC filter (typically 20 and 20 pF) between the signal source(s) the AIN+ (and AIN) input(s)
when the systems bandwidth requirements allow this.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| THS1041IPWRG4 | 功能描述:模数转换器 - ADC 10 Bit 40 MSPS Lo-Pwr 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 |
| THS10420RJ | 功能描述:线绕电阻器 - 底架安装 THS10 420R 5% RoHS:否 制造商:Vishay/Dale 电阻:7 Ohms 容差:1 % 功率额定值:100 W 温度系数:50 PPM / C 系列:RH 工作温度范围:- 55 C to + 250 C 尺寸:46.02 mm Dia. x 46.02 mm W x 88.9 mm L x 44.45 mm H 封装:Bulk 产品:Power Resistors Wirewound Aluminum Housed |
| THS10470RJ | 功能描述:线绕电阻器 - 底架安装 THS10 470R 5% RoHS:否 制造商:Vishay/Dale 电阻:7 Ohms 容差:1 % 功率额定值:100 W 温度系数:50 PPM / C 系列:RH 工作温度范围:- 55 C to + 250 C 尺寸:46.02 mm Dia. x 46.02 mm W x 88.9 mm L x 44.45 mm H 封装:Bulk 产品:Power Resistors Wirewound Aluminum Housed |
| THS10470RJ | 制造商:TE Connectivity 功能描述:RESISTOR WIREWOUND 470OHM 10W 5% |
| THS1047RJ | 功能描述:线绕电阻器 - 底架安装 THS10 47R 5% RoHS:否 制造商:Vishay/Dale 电阻:7 Ohms 容差:1 % 功率额定值:100 W 温度系数:50 PPM / C 系列:RH 工作温度范围:- 55 C to + 250 C 尺寸:46.02 mm Dia. x 46.02 mm W x 88.9 mm L x 44.45 mm H 封装:Bulk 产品:Power Resistors Wirewound Aluminum Housed |
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