ISO124 Isolation Amplifiers:Pinout, Price and Datasheet PDF
1 Channels 15mA per Channel 140 dB Instrumentational OP Amps ±4.5V~18V ISO124 16-DIP (0.300, 7.62mm), 8 Leads









1 Channels 15mA per Channel 140 dB Instrumentational OP Amps ±4.5V~18V ISO124 16-DIP (0.300, 7.62mm), 8 Leads
The ISO124 is a precision isolation amplifier incorporating a novel duty cycle modulationdemodulation technique.This article mainly introduce its pinout, price, datasheet PDF and other detailed information about Texas Instruments ISO124.

ISO124
ISO124 Description
The ISO124 is a precision isolation amplifier incorporating a novel duty cycle modulationdemodulation technique. The signal is transmitted digitally across a 2-pF differential capacitive barrier. With digital modulation, the barrier characteristics do not affect signal integrity, thus resulting in excellent reliability and good high-frequency transient immunity across the barrier. Both barrier capacitors are imbedded in the plastic body of the package. The ISO124 is easy to use. No external components are required for operation. The key specifications are 0.010% maximum nonlinearity, 50-kHz signal bandwidth, and 200-µV/°C VOS drift. A power supply range of ±4.5 V to ±18 V, and quiescent currents of ±5 mA on VS1 and ±5.5 mA on VS2 make the ISO124 device a good choice for a wide range of applications. The ISO124 is available in 16-pin PDIP and 28-lead SOIC plastic surface-mount packages.
ISO124 Pinout

ISO124 CAD Model
Symbol

Footprint

3D Model

ISO124 Features
• 100% Tested for High-Voltage Breakdown
• Rated 1500 Vrms
• High IMR: 140 dB at 60 Hz
• Maximum Nonlinearity: 0.010%
• Bipolar Operation: VO = ±10 V
• Packages: PDIP-16 and SOIC-28
• Ease of Use: Fixed Unity Gain Configuration
• Supply Range: ±4.5-V to ±18-V
Specifications
- TypeParameter
- Lifecycle Status
Lifecycle Status refers to the current stage of an electronic component in its product life cycle, indicating whether it is active, obsolete, or transitioning between these states. An active status means the component is in production and available for purchase. An obsolete status indicates that the component is no longer being manufactured or supported, and manufacturers typically provide a limited time frame for support. Understanding the lifecycle status is crucial for design engineers to ensure continuity and reliability in their projects.
ACTIVE (Last Updated: 4 days ago) - Factory Lead Time6 Weeks
- Mounting Type
The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.
Through Hole - Package / Case
refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.
16-DIP (0.300, 7.62mm), 8 Leads - Surface Mount
having leads that are designed to be soldered on the side of a circuit board that the body of the component is mounted on.
NO - Number of Pins8
- Weight930.006106mg
- Operating Temperature
The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.
-25°C~85°C - Packaging
Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.
Tube - JESD-609 Code
The "JESD-609 Code" in electronic components refers to a standardized marking code that indicates the lead-free solder composition and finish of electronic components for compliance with environmental regulations.
e4 - Pbfree Code
The "Pbfree Code" parameter in electronic components refers to the code or marking used to indicate that the component is lead-free. Lead (Pb) is a toxic substance that has been widely used in electronic components for many years, but due to environmental concerns, there has been a shift towards lead-free alternatives. The Pbfree Code helps manufacturers and users easily identify components that do not contain lead, ensuring compliance with regulations and promoting environmentally friendly practices. It is important to pay attention to the Pbfree Code when selecting electronic components to ensure they meet the necessary requirements for lead-free applications.
yes - Part Status
Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.
Active - Moisture Sensitivity Level (MSL)
Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures
1 (Unlimited) - Number of Terminations8
- ECCN Code
An ECCN (Export Control Classification Number) is an alphanumeric code used by the U.S. Bureau of Industry and Security to identify and categorize electronic components and other dual-use items that may require an export license based on their technical characteristics and potential for military use.
EAR99 - Resistance
Resistance is a fundamental property of electronic components that measures their opposition to the flow of electric current. It is denoted by the symbol "R" and is measured in ohms (Ω). Resistance is caused by the collisions of electrons with atoms in a material, which generates heat and reduces the flow of current. Components with higher resistance will impede the flow of current more than those with lower resistance. Resistance plays a crucial role in determining the behavior and functionality of electronic circuits, such as limiting current flow, voltage division, and controlling power dissipation.
200kOhm - Terminal Finish
Terminal Finish refers to the surface treatment applied to the terminals or leads of electronic components to enhance their performance and longevity. It can improve solderability, corrosion resistance, and overall reliability of the connection in electronic assemblies. Common finishes include nickel, gold, and tin, each possessing distinct properties suitable for various applications. The choice of terminal finish can significantly impact the durability and effectiveness of electronic devices.
Nickel/Palladium/Gold (Ni/Pd/Au) - Terminal Position
In electronic components, the term "Terminal Position" refers to the physical location of the connection points on the component where external electrical connections can be made. These connection points, known as terminals, are typically used to attach wires, leads, or other components to the main body of the electronic component. The terminal position is important for ensuring proper connectivity and functionality of the component within a circuit. It is often specified in technical datasheets or component specifications to help designers and engineers understand how to properly integrate the component into their circuit designs.
DUAL - Number of Functions1
- Supply Voltage
Supply voltage refers to the electrical potential difference provided to an electronic component or circuit. It is crucial for the proper operation of devices, as it powers their functions and determines performance characteristics. The supply voltage must be within specified limits to ensure reliability and prevent damage to components. Different electronic devices have specific supply voltage requirements, which can vary widely depending on their design and intended application.
15V - Terminal Pitch
The center distance from one pole to the next.
2.54mm - Base Part Number
The "Base Part Number" (BPN) in electronic components serves a similar purpose to the "Base Product Number." It refers to the primary identifier for a component that captures the essential characteristics shared by a group of similar components. The BPN provides a fundamental way to reference a family or series of components without specifying all the variations and specific details.
ISO124 - Output Voltage
Output voltage is a crucial parameter in electronic components that refers to the voltage level produced by the component as a result of its operation. It represents the electrical potential difference between the output terminal of the component and a reference point, typically ground. The output voltage is a key factor in determining the performance and functionality of the component, as it dictates the level of voltage that will be delivered to the connected circuit or load. It is often specified in datasheets and technical specifications to ensure compatibility and proper functioning within a given system.
12.5V - Number of Channels1
- Operating Supply Current
Operating Supply Current, also known as supply current or quiescent current, is a crucial parameter in electronic components that indicates the amount of current required for the device to operate under normal conditions. It represents the current drawn by the component from the power supply while it is functioning. This parameter is important for determining the power consumption of the component and is typically specified in datasheets to help designers calculate the overall power requirements of their circuits. Understanding the operating supply current is essential for ensuring proper functionality and efficiency of electronic systems.
5mA - Nominal Supply Current
Nominal current is the same as the rated current. It is the current drawn by the motor while delivering rated mechanical output at its shaft.
5mA - Slew Rate
the maximum rate of output voltage change per unit time.
2V/μs - Amplifier Type
Amplifier Type refers to the classification or categorization of amplifiers based on their design, functionality, and characteristics. Amplifiers are electronic devices that increase the amplitude of a signal, such as voltage or current. The type of amplifier determines its specific application, performance capabilities, and operating characteristics. Common types of amplifiers include operational amplifiers (op-amps), power amplifiers, audio amplifiers, and radio frequency (RF) amplifiers. Understanding the amplifier type is crucial for selecting the right component for a particular circuit or system design.
Isolation - Common Mode Rejection Ratio
Common Mode Rejection Ratio (CMRR) is a measure of the ability of a differential amplifier to reject input signals that are common to both input terminals. It is defined as the ratio of the differential gain to the common mode gain. A high CMRR indicates that the amplifier can effectively eliminate noise and interference that affects both inputs simultaneously, enhancing the fidelity of the amplified signal. CMRR is typically expressed in decibels (dB), with higher values representing better performance in rejecting common mode signals.
140 dB - Max Input Voltage
Max Input Voltage refers to the maximum voltage level that an electronic component can safely handle without getting damaged. This parameter is crucial for ensuring the proper functioning and longevity of the component. Exceeding the specified maximum input voltage can lead to overheating, electrical breakdown, or permanent damage to the component. It is important to carefully adhere to the manufacturer's guidelines regarding the maximum input voltage to prevent any potential issues and maintain the reliability of the electronic device.
12.5V - Voltage - Supply, Single/Dual (±)
The parameter "Voltage - Supply, Single/Dual (±)" in electronic components refers to the power supply voltage required for the proper operation of the component. This parameter indicates whether the component requires a single power supply voltage (e.g., 5V) or a dual power supply voltage (e.g., ±15V). For components that require a single power supply voltage, only one voltage level is needed for operation. On the other hand, components that require a dual power supply voltage need both positive and negative voltage levels to function correctly.Understanding the voltage supply requirements of electronic components is crucial for designing and integrating them into circuits to ensure proper functionality and prevent damage due to incorrect voltage levels.
±4.5V~18V - Output Current per Channel
Output Current per Channel is a specification commonly found in electronic components such as amplifiers, audio interfaces, and power supplies. It refers to the maximum amount of electrical current that can be delivered by each individual output channel of the component. This parameter is important because it determines the capacity of the component to drive connected devices or loads. A higher output current per channel means the component can deliver more power to connected devices, while a lower output current may limit the performance or functionality of the component in certain applications. It is crucial to consider the output current per channel when selecting electronic components to ensure they can meet the power requirements of the intended system or setup.
15mA - Input Offset Voltage (Vos)
Input Offset Voltage (Vos) is a key parameter in electronic components, particularly in operational amplifiers. It refers to the voltage difference that must be applied between the two input terminals of the amplifier to nullify the output voltage when the input terminals are shorted together. In simpler terms, it represents the voltage required to bring the output of the amplifier to zero when there is no input signal present. Vos is an important parameter as it can introduce errors in the output signal of the amplifier, especially in precision applications where accuracy is crucial. Minimizing Vos is essential to ensure the amplifier operates with high precision and accuracy.
50mV - Bandwidth
In electronic components, "Bandwidth" refers to the range of frequencies over which the component can effectively operate or pass signals without significant loss or distortion. It is a crucial parameter for devices like amplifiers, filters, and communication systems. The bandwidth is typically defined as the difference between the upper and lower frequencies at which the component's performance meets specified criteria, such as a certain level of signal attenuation or distortion. A wider bandwidth indicates that the component can handle a broader range of frequencies, making it more versatile for various applications. Understanding the bandwidth of electronic components is essential for designing and optimizing circuits to ensure proper signal transmission and reception within the desired frequency range.
50 kHz - Neg Supply Voltage-Nom (Vsup)
The parameter "Neg Supply Voltage-Nom (Vsup)" in electronic components refers to the nominal negative supply voltage that the component requires to operate within its specified performance characteristics. This parameter indicates the minimum voltage level that must be provided to the component's negative supply pin for proper functionality. It is important to ensure that the negative supply voltage provided to the component does not exceed the maximum specified value to prevent damage or malfunction. Understanding and adhering to the specified negative supply voltage requirements is crucial for the reliable operation of the electronic component in a circuit.
-15V - Voltage Gain
Voltage gain is a measure of how much an electronic component or circuit amplifies an input voltage signal to produce an output voltage signal. It is typically expressed as a ratio or in decibels (dB). A higher voltage gain indicates a greater amplification of the input signal. Voltage gain is an important parameter in amplifiers, where it determines the level of amplification provided by the circuit. It is calculated by dividing the output voltage by the input voltage and is a key factor in determining the overall performance and functionality of electronic devices.
0dB - Voltage - Input Offset
Voltage - Input Offset is a parameter that refers to the difference in voltage between the input terminals of an electronic component, such as an operational amplifier, when the input voltage is zero. It is an important characteristic that can affect the accuracy and performance of the component in various applications. A low input offset voltage is desirable as it indicates that the component will have minimal error in its output when the input signal is near zero. Manufacturers typically provide this specification in the component's datasheet to help users understand the component's behavior and make informed decisions when designing circuits.
20mV - -3db Bandwidth
The "-3dB bandwidth" of an electronic component refers to the frequency range over which the component's output signal power is reduced by 3 decibels (dB) compared to its maximum output power. This parameter is commonly used to describe the frequency response of components such as amplifiers, filters, and other signal processing devices. The -3dB point is significant because it represents the half-power point, where the output signal power is reduced to half of its maximum value. Understanding the -3dB bandwidth is important for designing and analyzing electronic circuits to ensure that signals are accurately processed within the desired frequency range.
50MHz - Dual Supply Voltage
Dual Supply Voltage refers to an electronic component's requirement for two separate power supply voltages, typically one positive and one negative. This configuration is commonly used in operational amplifiers, analog circuits, and certain digital devices to allow for greater signal handling capabilities and improved performance. The use of dual supply voltages enables the device to process bipolar signals, thereby enhancing its functionality in various applications.
9V - Isolation Voltage
Isolation voltage refers to a test of the ability of an insulator to minimize the flow of electric current with a high applied voltage.
1.5kV - Height5.33mm
- Length20.01mm
- Width6.61mm
- Thickness
Thickness in electronic components refers to the measurement of how thick a particular material or layer is within the component structure. It can pertain to various aspects, such as the thickness of a substrate, a dielectric layer, or conductive traces. This parameter is crucial as it impacts the electrical, mechanical, and thermal properties of the component, influencing its performance and reliability in electronic circuits.
3.94mm - REACH SVHC
The parameter "REACH SVHC" in electronic components refers to the compliance with the Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) regulation regarding Substances of Very High Concern (SVHC). SVHCs are substances that may have serious effects on human health or the environment, and their use is regulated under REACH to ensure their safe handling and minimize their impact.Manufacturers of electronic components need to declare if their products contain any SVHCs above a certain threshold concentration and provide information on the safe use of these substances. This information allows customers to make informed decisions about the potential risks associated with using the components and take appropriate measures to mitigate any hazards.Ensuring compliance with REACH SVHC requirements is essential for electronics manufacturers to meet regulatory standards, protect human health and the environment, and maintain transparency in their supply chain. It also demonstrates a commitment to sustainability and responsible manufacturing practices in the electronics industry.
No SVHC - Radiation Hardening
Radiation hardening is the process of making electronic components and circuits resistant to damage or malfunction caused by high levels of ionizing radiation, especially for environments in outer space (especially beyond the low Earth orbit), around nuclear reactors and particle accelerators, or during nuclear accidents or nuclear warfare.
No - RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
ROHS3 Compliant - Lead Free
Lead Free is a term used to describe electronic components that do not contain lead as part of their composition. Lead is a toxic material that can have harmful effects on human health and the environment, so the electronics industry has been moving towards lead-free components to reduce these risks. Lead-free components are typically made using alternative materials such as silver, copper, and tin. Manufacturers must comply with regulations such as the Restriction of Hazardous Substances (RoHS) directive to ensure that their products are lead-free and environmentally friendly.
Lead Free
ISO124 Functional Block Diagram

ISO124 Application
• Industrial Process Control:
–Transducer Isolator, Isolator for Thermocouples, RTDs, Pressure Bridges, and Flow Meters, 4-mA to 20-mA Loop Isolation
• Ground Loop Elimination
• Motor and SCR Control
• Power Monitoring
• PC-Based Data Acquisition
• Test Equipment
ISO124 Typical Application

Battery Monitor for a 600-V Battery Power System

Input-Side Powered ISO Amplifier Schematic

ISO124 With Output Filter for Improved Ripple

Isolated 4- to 20-mA Instrument Loop (RTD Shown)

Programmable-Gain Isolation Channel With Gains of 1, 10, and 100

Single-Supply Operation of the ISO124 Isolation Amplifier Schematic

Thermocouple Amplifier With Ground Loop Elimination,

Powered ISO Amplifier With Three-Port Isolation Schematic
ISO124 Mechanical Data

ISO124 Manufacturer
As a global semiconductor company operating in 35 countries, Texas Instruments (TI) is first and foremost a reflection of its people. From the TIer who unveiled the first working integrated circuit in 1958 to the more than 30,000 TIers around the world today who design, manufacture and sell analog and embedded processing chips, we are problem-solvers collaborating to change the world through technology.
Trend Analysis
1.Where can the chip ISO124 be used in automotive electronics? How many chips can be used in each place?
Two chips can be used in the hybrid battery monitoring circuit.
2.I am using ISO124 as a data acquisition system. Since the offset voltage of ISO itself is about 20mV, it has a relatively large impact on the sampling accuracy. Is there any way to reduce the impact of the offset voltage?
According to the signal frequency to be processed, use a capacitor of about 100uF (impedance of about 30ohm at 50Hz) after blocking, add a resistance to ground of a few k ohms, and then select an op amp with a small offset as a buffer to ensure that it will not affect the final The sampling accuracy of AD.
3.There is a voltage of about 17V that needs to be collected. Is there any hidden danger in using ISO124? What should be paid attention to? Is it ok to collect signals lower than the supply voltage?
It is recommended to refer to the electrical conditions in "Recommended Operating Conditions". The typical values of the two voltages of ISO124 are VS1=+-15V, VS2=+-15V, and the typical value of Vin is +-10V, so it is not recommended to exceed this voltage range.
4.Does the output voltage of the ISO124P chip follow the input voltage?
The typical value of ISO124P voltage gain is 1, and the accuracy is ±0.05% (typical value) ~ ±0.5% (maximum value) of full-scale output, so its output voltage basically follows the input voltage, but when the load is too heavy or There will be distortion when the frequency is too high.
5.When do I need to use isolated amplifiers such as ISO124?
In some cases, the signal input and output terminals cannot share the ground. In this case, an isolated amplifier or a linear optocoupler must be used to achieve signal isolation.
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