Features
- 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
Description
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).
Applications
- 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 |
Filters
Applied Filters
- Product Change NoticePDF 152 KB PCN12085 Nov 07, 2012
- Product Change NoticePDF 117 KB PCN11059 Jun 17, 2011
- Application NotePDF 843 KB an535 Jun 05, 2002AI-generated Summary: 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.
- Application NotePDF 503 KB an9675 Aug 13, 1999AI-generated Summary: 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.
- Application NotePDF 1.08 MB an002 Nov 19, 1998AI-generated Summary: 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.
- Application NotePDF 287 KB an9705 Feb 21, 1997AI-generated Summary: 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.
Recommended Documents (1)
Datasheets (1)
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- Application NotePDF 843 KB an535 Jun 05, 2002AI-generated Summary: 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.
- Application NotePDF 503 KB an9675 Aug 13, 1999AI-generated Summary: 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.
- Application NotePDF 1.08 MB an002 Nov 19, 1998AI-generated Summary: 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.
- Application NotePDF 287 KB an9705 Feb 21, 1997AI-generated Summary: 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.
Application Notes & White Papers (4)
- Product Change NoticePDF 152 KB PCN12085 Nov 07, 2012
- Product Change NoticePDF 117 KB PCN11059 Jun 17, 2011
Product Notices (PCN, EOL, etc) (4)
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Support Communities
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Suggestion for external ADC on S7G2-SK
Hi everyone, I'm kind of new in this environment so I've have been asking around lots of questions about everything to use the Renesas Synergy platform in the best way possible. (It's been going great with all the community's support, thank you guys.) Anyways returning to ...
Mar 20, 2017