Home > Industry Information > PAMC0311SQDWVRQ1: High-Precision Isolated Amplifier
PAMC0311SQDWVRQ1 is an automotive-grade enhanced isolated amplifier produced by Texas Instruments. The following is the main information of this model:
· Operating temperature range: -40 °C to +125°C
· Package type: 8-pin SOIC
· Input voltage range: 0V to 2.25V
· High input impedance: 1GΩ (typical value)
· Power supply voltage range:
High side (VDD1) : 3.0V to 5.5V
Low side (VDD2) : 3.0V to 5.5V
· Low DC error:
Offset voltage error: ±1.5mV (maximum value)
Offset voltage temperature drift: ±25µV/°C (maximum value)
Gain error: ±0.25% (maximum value)
Gain drift: ±40ppm/°C (maximum value)
Nonlinearity: 0.05% (maximum value)
PAMC0311SQDWVRQ1, as an automotive-grade enhanced isolated amplifier, has the following main characteristic advantages:
Input impedance up to 1GΩ : This feature enables the chip to be directly connected to high-impedance resistor voltage dividers or other voltage signal sources with high
output resistance without the need for additional buffer amplifiers, simplifying circuit design and reducing costs.
Low offset voltage error: The maximum value is only ±1.5mV, ensuring high-precision voltage measurement.
Low offset voltage temperature drift: maximum ±25µV/°C, ensuring the stability of measurement under different temperature conditions.
Low gain error: maximum ±0.25%, ensuring the accuracy of the measurement.
Low gain drift: maximum ±40ppm/°C, further enhancing the long-term stability of the measurement.
Low nonlinearity: maximum value 0.05%, ensuring high-precision measurement throughout the entire measurement range.
High CMTI: With a minimum value of 50V/ns, it can effectively suppress common-mode interference and ensure accurate signal transmission in high-noise environments.
It is particularly suitable for complex electromagnetic environment application scenarios such as automobiles.
4. Low electromagnetic interference (EMI)
Low EMI: Compliant with CISPR-11 and CISPR-25 standards, it ensures that no excessive electromagnetic interference is generated in electromagnetically sensitive environments
such as automobiles, and also resists external electromagnetic interference, guaranteeing the reliability of the system.
PAMC0311SQDWVRQ1, as an automotive-grade high-precision isolated amplifier, its characteristics are suitable for the following application fields:
1.Automotive high-voltage battery management system
Battery voltage monitoring: It is used to monitor the voltage of high-voltage battery packs in electric vehicles (EV) and hybrid electric vehicles (HEV). The high input impedance and low DC error characteristics
ensure precise measurement of battery voltage, which helps optimize the performance of the battery management system and extend battery life.
Battery balancing control: During the battery balancing process, precise voltage measurement is crucial for ensuring the balancing and safety of the battery pack.
The high precision and low drift characteristics of PAMC0311SQDWVRQ1 make it an ideal solution.
2. Motor control
Motor driver: In the motor drive systems of electric vehicles and hybrid vehicles, it is used to monitor the voltage and current of the motor driver. Its high common-mode transient immunity (CMTI) and low electromagnetic
interference (EMI) characteristics ensure signal integrity in high-noise environments.
Inverter control: It is used in the inverter to monitor the DC bus voltage to ensure the stable operation of the inverter. Its enhanced isolation feature provides the necessary electrical isolation, ensuring the safety of the system.
3. Automotive electronic control unit
Power supply monitoring: It is used to monitor the power supply voltage of the ECU to ensure the stability and reliability of the power supply. Its high input impedance and low power consumption characteristics make it suitable for use in compact ECUs.
Signal isolation: It is used in the ECU to isolate signals of different potentials, ensuring the accurate transmission of signals and the electrical safety of the system.
4. Automotive safety system
Airbag system: It is used to monitor the power supply voltage and sensor signals of the airbag system to ensure reliable triggering of the system in emergency situations.
Braking system: In the electronic parking brake system (EPB) and the electronic power steering system (EPS), it is used to monitor the voltage and current of the motor to ensure the precise control and safe operation of the system.
PAMC0311SQDWVRQ1, with its high input impedance, high common-mode transient immunity, low electromagnetic interference, and enhanced isolation features, has become an ideal isolation amplifier for automotive applications.
It is applicable to application scenarios that require high precision, high reliability and high isolation voltage, such as automotive high-voltage battery management systems, motor control, and automotive electronic control units.
Industry Information
