特性
- Drop-in Compatible with AD7450
- Differential Input
- Simple SPI-compatible Serial Digital Interface
- Guaranteed No Missing Codes
- 1MHz Sampling Rate
- 3V or 5V Operation
- Low Operating Current
- 1.25mA at 833kSPS with 3V Supplies
- 1.7mA at 1MSPS with 5V Supplies
- Power-down Current between Conversions: 1μA
- Excellent Differential Non-Linearity
- Low THD: -83dB (typ)
- Pb-Free (RoHS Compliant)
- Available in SOIC and MSOP Packages
ISL267450 Functional Diagram
描述
The ISL267450 is a 12-bit, 1MSPS sampling SAR-type ADC with a differential input span of 2*VREF volts. The ISL267450 features excellent linearity over supply and temperature variations and is drop-in compatible with the AD7450. The device can operate from a supply voltage of either 5V or 3V and maintain measurement accuracy with input signals up to the supply rails. The serial digital interface is SPI compatible and is easily interfaced to popular FPGAs and microcontrollers. Power dissipation is 9. 0mW at a sampling rate of 1MSPS, and just 5μW between conversions utilizing Auto Power-Down mode (with a 3V supply). The ISL267450 is available in 8 Ld SOIC or MSOP packages, and are specified for operation over the Industrial temperature range (–40°C to +85°C).
应用
- Remote Data Acquisition
- Battery Operated Systems
- Industrial Process Control
- Energy Measurement
- Data Acquisition Systems
- Pressure Sensors
- Flow Controllers
| Part Number | Status | Samples | Stock | RoHS | Package | Lead Count (#) | Carrier Type | Moisture Sensitivity Level (MSL) | Pitch (mm) | Pkg. Dimensions (mm) | Pb (Lead) Free | Pb Free Category | Temp. Range (°C) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ISL267450IBZ | Obsolete | N/A | Out of Stock | RoHS:EN | SOIC | 8# | Tube | 1 | 1.3mm | 4.9 x 3.9 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C |
| ISL267450IBZ-T | Obsolete | N/A | In Stock | RoHS:EN | SOIC | 8# | Reel | 1 | 1.3mm | 4.9 x 3.9 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C |
| ISL267450IBZ-T7A | Obsolete | N/A | In Stock | RoHS:EN | SOIC | 8# | Reel | 1 | 1.3mm | 4.9 x 3.9 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C |
| ISL267450IUZ | Obsolete | N/A | In Stock | RoHS:EN | MSOP | 8# | Tube | 1 | 0.7mm | 3.0 x 3.0 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C |
| ISL267450IUZ-T | Obsolete | N/A | Out of Stock | RoHS:EN | MSOP | 8# | Reel | 0.7mm | 3.0 x 3.0 x 0.00 | No | -40 to +85°C | ||
| ISL267450IUZ-T7A | Obsolete | N/A | In Stock | RoHS:EN | MSOP | 8# | Reel | 1 | 0.7mm | 3.0 x 3.0 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C |
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- 产品变更通告英语PDF 152 KB PCN12085 2012年11月07日
- 产品变更通告英语PDF 117 KB PCN11059 2011年6月17日
- 应用说明英语PDF 843 KB an535 2002年6月05日AI 生成的摘要: A Data Acquisition System (DAS) requires careful design of signal conditioning, transducer selection, and signal transmission to ensure high accuracy. Signal conditioning includes multiplexing, amplification, filtering, and calibration, ideally performed near the transducer. Transducers convert physical variables to electrical signals, often voltage, with low source resistance preferred. Signal paths can be single-ended or differential; differential paths better reject common mode noise, especially for low-level signals. Shielded twisted pairs and balanced lines reduce interference. Filters, typically Butterworth low-pass, prevent aliasing and maintain signal integrity.
- 应用说明英语PDF 503 KB an9675 1999年8月13日AI 生成的摘要: Effective Number of Bits (ENOB) depends critically on precise coherence in A/D sampling, with small frequency shifts significantly impacting accuracy. Unwrapping reconstructs coherently sampled sine waves, while windowing controls spectral leakage by shaping the acquisition window. Resampling and interpolation adjust sample sets to avoid leakage in FFT analysis. Different window functions balance side lobe levels and bandwidth, affecting spectral resolution and leakage reduction.
- 应用说明英语PDF 1.08 MB an002 1998年11月19日AI 生成的摘要: Data acquisition and conversion involve quantization, where the smallest resolvable analog difference (quantum) depends on the full scale range and resolution. Quantization introduces an irreducible error called quantizing error or noise. Aperture time, the conversion time uncertainty, causes amplitude errors when signals change during conversion. Sample-hold circuits reduce aperture time by storing sampled signals. The Sampling Theorem states that sampling frequency must be at least twice the highest signal frequency to avoid distortion from frequency folding or aliasing. Natural binary code is commonly used for digital representation in converters, with the most and least significant bits defining the code's resolution and value.
- 应用说明英语PDF 287 KB an9705 1997年2月21日AI 生成的摘要: Coherent sampling requires the ratio of signal frequency to sampling frequency to be a rational number, expressed as ko/N. When this condition is not met, frequency smearing occurs across bins. Data Acquisition Systems (DAS) can mitigate this by windowing, fixing sampling frequency and tuning input frequency, or fixing input frequency and tuning sampling frequency. The latter two methods are practical for most systems. Pseudo-code illustrates the frequency response for non-integer ko values.
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- 应用说明英语PDF 843 KB an535 2002年6月05日AI 生成的摘要: A Data Acquisition System (DAS) requires careful design of signal conditioning, transducer selection, and signal transmission to ensure high accuracy. Signal conditioning includes multiplexing, amplification, filtering, and calibration, ideally performed near the transducer. Transducers convert physical variables to electrical signals, often voltage, with low source resistance preferred. Signal paths can be single-ended or differential; differential paths better reject common mode noise, especially for low-level signals. Shielded twisted pairs and balanced lines reduce interference. Filters, typically Butterworth low-pass, prevent aliasing and maintain signal integrity.
- 应用说明英语PDF 503 KB an9675 1999年8月13日AI 生成的摘要: Effective Number of Bits (ENOB) depends critically on precise coherence in A/D sampling, with small frequency shifts significantly impacting accuracy. Unwrapping reconstructs coherently sampled sine waves, while windowing controls spectral leakage by shaping the acquisition window. Resampling and interpolation adjust sample sets to avoid leakage in FFT analysis. Different window functions balance side lobe levels and bandwidth, affecting spectral resolution and leakage reduction.
- 应用说明英语PDF 1.08 MB an002 1998年11月19日AI 生成的摘要: Data acquisition and conversion involve quantization, where the smallest resolvable analog difference (quantum) depends on the full scale range and resolution. Quantization introduces an irreducible error called quantizing error or noise. Aperture time, the conversion time uncertainty, causes amplitude errors when signals change during conversion. Sample-hold circuits reduce aperture time by storing sampled signals. The Sampling Theorem states that sampling frequency must be at least twice the highest signal frequency to avoid distortion from frequency folding or aliasing. Natural binary code is commonly used for digital representation in converters, with the most and least significant bits defining the code's resolution and value.
- 应用说明英语PDF 287 KB an9705 1997年2月21日AI 生成的摘要: Coherent sampling requires the ratio of signal frequency to sampling frequency to be a rational number, expressed as ko/N. When this condition is not met, frequency smearing occurs across bins. Data Acquisition Systems (DAS) can mitigate this by windowing, fixing sampling frequency and tuning input frequency, or fixing input frequency and tuning sampling frequency. The latter two methods are practical for most systems. Pseudo-code illustrates the frequency response for non-integer ko values.
应用说明和白皮书 (4)
- 产品变更通告英语PDF 152 KB PCN12085 2012年11月07日
- 产品变更通告英语PDF 117 KB PCN11059 2011年6月17日
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