Features
- 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 ICL7106, LED lCL7107
- Low Noise - Less Than 15µVP-P
- On Chip Clock and Reference
- Low Power Dissipation - Typically Less Than 10mW
- No Additional Active Circuits Required
- Enhanced Display Stability
- Pb-Free Plus Anneal Available (RoHS Compliant)
ICL710x_ICL7107x Functional Diagram
Description
The Intersil ICL7106 and ICL7107 are high performance, low power, 31/2 digit A/D converters. Included are seven segment decoders, display drivers, a reference, and a clock. The ICL7106 is designed to interface with a liquid crystal display (LCD) and includes a multiplexed backplane drive; the ICL7107 will directly drive an instrument size light emitting diode (LED) display. The ICL7106 and ICL7107 bring together a combination of high accuracy, versatility, and true economy. It features autozero 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 (ICL7106), enables a high performance panel meter to be built with the addition of only 10 passive components and a display.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ICL7107CM44Z | Last Time Buy | Available | In Stock | RoHS:EN | MQFP | 1ku | $5.74 | 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 |
| ICL7107CM44ZT | Last Time Buy | Available | Out of Stock | RoHS:EN | MQFP | 1ku | $5.74 | 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 |
| ICL7107CPLZ | Obsolete | N/A | In Stock | RoHS:EN | PDIP | 1ku | $11.34 | 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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- Application NotePDF 374 KB an017 Dec 13, 2001AI-generated Summary: 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.
- 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 523 KB an046 May 13, 1999AI-generated Summary: 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.
- Application NotePDF 471 KB an052 Apr 23, 1999AI-generated Summary: 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.
- Application NotePDF 529 KB an023 Mar 30, 1999AI-generated Summary: 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.
- 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 299 KB an9609 Aug 19, 1998AI-generated Summary: 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.
- Application NotePDF 508 KB an9510 Aug 19, 1998AI-generated Summary: 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.
- 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.
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- Application NotePDF 374 KB an017 Dec 13, 2001AI-generated Summary: 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.
- 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 523 KB an046 May 13, 1999AI-generated Summary: 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.
- Application NotePDF 471 KB an052 Apr 23, 1999AI-generated Summary: 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.
- Application NotePDF 529 KB an023 Mar 30, 1999AI-generated Summary: 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.View More (9)
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Knowledge Base
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How can I get the least significant digit on the ICL7107 to settle?
Question:We have tested the ICL7107 and found the "1's" is very unstable; when we raise the clock to 48kHz, the "1's" digit refresh keeps changing. This may be because it needs some change of the external components. Can we get help to solve this? We are using ...
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