特性
- First Reading Overrange Recovery in One Conversion Period
- Guaranteed Zero Reading for 0V Input on All Scales
- True Polarity at Zero for Precise Null Detection
- 1pA Typical Input Current
- True Differential Input and Reference, Direct Display Drive
- LCD ICL7136
- Low Noise - Less Than 15µVP-P
- On Chip Clock and Reference
- No Additional Active Circuits Required
- Low Power - Less Than 1mW
- Surface Mount Package Available
- Drop-In Replacement for ICL7126, No Changes Needed
- Pb-Free Plus Anneal Available (RoHS Compliant)
ICL7136 Functional Diagram
描述
The Intersil ICL7136 is a high performance, low power 31/2 digit, A/D converter. Included are seven segment decoders, display drivers, a reference, and a clock. The ICL7136 is designed to interface with a liquid crystal display (LCD) and includes a multiplexed backplane drive. The ICL7136 brings together a combination of high accuracy, versatility, and true economy. It features auto-zero to less than 10µV, zero drift of less than 1µV/oC, input bias current of 10pA (Max), and rollover error of less than one count. True differential inputs and reference are useful in all systems, but give the designer an uncommon advantage when measuring load cells, strain gauges and other bridge type transducers. Finally, the true economy of single power supply operation, enables a high performance panel meter to be built with the addition of only 10 passive components and a display. The ICL7136 is an improved version of the ICL7126, eliminating the overrange hangover and hysteresis effects, and should be used in its place in all applications. It can also be used as a plug-in replacement for the ICL7106 in a wide variety of applications, changing only the passive components.
| Part Number | Status | Samples | Stock | RoHS | Package | Budgetary Price (USD) | Lead Count (#) | Carrier Type | Moisture Sensitivity Level (MSL) | Pitch (mm) | Pkg. Dimensions (mm) | Pb (Lead) Free | Pb Free Category | Temp. Range (°C) | Country of Assembly | Country of Wafer Fabrication |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ICL7136CM44Z | Last Time Buy | Available | In Stock | RoHS:EN | MQFP | 1ku | $7.22 | 44# | Tray | 3 | 0.8mm | 10.0 x 10.0 x 2.02 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | 0 to +70°C | PHILIPPINES, MALAYSIA | USA |
| ICL7136CM44ZT | Last Time Buy | Available | Out of Stock | RoHS:EN | MQFP | 1ku | $7.22 | 44# | Reel | 3 | 0.8mm | 10.0 x 10.0 x 2.02 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | 0 to +70°C | PHILIPPINES, MALAYSIA | USA |
| ICL7136CPLZ | Obsolete | N/A | In Stock | RoHS:EN | PDIP | 1ku | $9.41 | 40# | Tube | Not Applicable | 2.5mm | 52.1 x 14.0 x 4.06 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | 0 to +70°C | MALAYSIA, TAIWAN, PHILIPPINES | USA |
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- 应用说明英语PDF 374 KB an017 2001年12月13日AI 生成的摘要: The document analyzes the ICL7135 integrating A/D converter's performance, focusing on errors such as offset due to charge injection, rollover errors from stray capacitance, buffer nonlinearity, and comparator delay. It explains capacitor leakage, charge injection effects, and dielectric absorption impacts. The maximum clock frequency is limited by comparator delay but can be extended with compensation. Noise characteristics and methods to reduce noise via buffer gain are also discussed.
- 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 523 KB an046 1999年5月13日AI 生成的摘要: The document explains building a battery-operated auto-ranging digital voltmeter using the ICL7106. It details the input divider network, clock generation, and timing for auto-ranging logic. The circuit operates on a 9V battery with low power consumption. Additional circuits include low voltage detection and voltage conversion from +5V to -5V. It also covers measuring resistance, transconductance, and current using the ICL7106. Adaptations for ICL7126 and ICL7107 are discussed, including power supply requirements and logic modifications.
- 应用说明英语PDF 471 KB an052 1999年4月23日AI 生成的摘要: The document provides detailed guidance on using single-chip 3 1/2 digit A/D converters, specifically the ICL7106, ICL7107, and ICL7126. It covers maximum power supply voltages, display options for LCD and LED types, timing and operating frequencies, ratiometric operation, temperature effects on readings, and recommended external components. Troubleshooting sections address accuracy, display, and functional issues, including causes and corrective actions. It also explains normal waveform behavior and battery operation with internal voltage references.
- 应用说明英语PDF 529 KB an023 1999年3月30日AI 生成的摘要: This document details low-cost digital panel meter designs with instructions for LCD and LED kits using ICL7106 and ICL7107. It covers component values for full-scale options, LCD segment drive methods, LED display characteristics, clock oscillator setup for noise rejection, reference voltage configurations including external references, power supply requirements, input filtering, and preliminary test procedures such as auto zero and over-range indications. It also discusses capacitor selection and provides circuits for generating negative supply voltages.
- 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 299 KB an9609 1998年8月19日AI 生成的摘要: The document addresses common mode range issues in integrating converters by analyzing operational amplifier configurations and their impact on ADC input measurements. It explains how output voltage relates to input voltage and common mode voltage, demonstrating a method to display battery voltage correctly despite measurement offsets. The document also includes important legal notices about product usage, liability disclaimers, quality grades, and compliance with regulations. Contact information for Renesas Electronics sales offices worldwide is provided.
- 应用说明英语PDF 508 KB an9510 1998年8月19日AI 生成的摘要: The document explains fundamental analog circuit concepts for digital designers, focusing on superposition, Thevenin equivalent circuits, and feedback principles. It details the operation and assumptions of inverting and non-inverting op amps, differential amplifiers, and the use of T networks in feedback paths. The text highlights the importance of feedback in controlling closed-loop gain and stability, and distinguishes between voltage and current feedback op amps, especially in high-frequency applications like video amplifiers.
- 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 374 KB an017 2001年12月13日AI 生成的摘要: The document analyzes the ICL7135 integrating A/D converter's performance, focusing on errors such as offset due to charge injection, rollover errors from stray capacitance, buffer nonlinearity, and comparator delay. It explains capacitor leakage, charge injection effects, and dielectric absorption impacts. The maximum clock frequency is limited by comparator delay but can be extended with compensation. Noise characteristics and methods to reduce noise via buffer gain are also discussed.
- 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 523 KB an046 1999年5月13日AI 生成的摘要: The document explains building a battery-operated auto-ranging digital voltmeter using the ICL7106. It details the input divider network, clock generation, and timing for auto-ranging logic. The circuit operates on a 9V battery with low power consumption. Additional circuits include low voltage detection and voltage conversion from +5V to -5V. It also covers measuring resistance, transconductance, and current using the ICL7106. Adaptations for ICL7126 and ICL7107 are discussed, including power supply requirements and logic modifications.
- 应用说明英语PDF 471 KB an052 1999年4月23日AI 生成的摘要: The document provides detailed guidance on using single-chip 3 1/2 digit A/D converters, specifically the ICL7106, ICL7107, and ICL7126. It covers maximum power supply voltages, display options for LCD and LED types, timing and operating frequencies, ratiometric operation, temperature effects on readings, and recommended external components. Troubleshooting sections address accuracy, display, and functional issues, including causes and corrective actions. It also explains normal waveform behavior and battery operation with internal voltage references.
- 应用说明英语PDF 529 KB an023 1999年3月30日AI 生成的摘要: This document details low-cost digital panel meter designs with instructions for LCD and LED kits using ICL7106 and ICL7107. It covers component values for full-scale options, LCD segment drive methods, LED display characteristics, clock oscillator setup for noise rejection, reference voltage configurations including external references, power supply requirements, input filtering, and preliminary test procedures such as auto zero and over-range indications. It also discusses capacitor selection and provides circuits for generating negative supply voltages.查看更多 (9)
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