In recent years, with the development of new energy
vehicles, the automotive industry has shown a trend of intelligence and
enhanced safety, putting forward higher requirements for chip performance,
adaptability, reliability, and safety.
AWINIC has launched the AWS79062SPR-Q1, an
automotive-grade low-noise CMOS dual-channel operational amplifier. It boasts
excellent performance such as low-voltage operation, rail-to-rail input and
output, outstanding bandwidth and slew rate, and ultra-low distortion. These efeatures enable the device to perform exceptionally well in processing complex
signals, meeting the demands for high-precision and high-stability signal
amplification in automotive systems.
Picture 1
AWS79062-Q1 Package
Key Parameters of
AWS79062-Q1
Complies with AEC-Q100 Grade 1 temperature rating (TA =
-40℃ to +125℃)
Wide operating voltage range: 1.8V ~ 5.5V
Low input offset voltage: 0.4mV (typical), 1mV (maximum)
Slew rate: 13V/µs
Low quiescent current: 850µA per channel
Gain bandwidth product: 10MHz
Rail-to-rail input and output
Main Applications
of AWS79062-Q1
Infotainment and instrument clusters
Passive safety systems
Body electronics and lighting
HEV/EV inverters and motor control
On-board chargers (OBC) and wireless chargers
Power system current sensors
Advanced Driver Assistance Systems (ADAS)
Highlight 1:
Higher Precision with Low Input Offset Voltage (VOS)
Input offset voltage VOS refers to the additional voltage
that needs to be compensated at the input terminal to make the output voltage
zero when the two input voltages of the operational amplifier are equal. The
magnitude of VOS affects the accuracy and error of the entire system's output.
Picture 2 Output
Voltage Curve
Highlight 2:
High Gain Bandwidth Product (GBW)
The gain bandwidth product is an important parameter used
to simply measure the performance of an operational amplifier. This parameter
represents the product of gain and bandwidth. The unity-gain bandwidth of an
operational amplifier refers to the -3dB bandwidth when the operational
amplifier's gain is 1, which is numerically equal to the gain bandwidth product
of the operational amplifier.
Picture 3 Signal
Amplification Schematic
Highlight 3:
Faster Output Response with High Slew Rate (SR)
The slew rate is the conversion rate of the output
voltage of an operational amplifier, an indicator of the operational amplifier
in terms of speed. It represents the ability of the operational amplifier to
respond to the speed of signal changes and is a parameter to measure the
operating speed of the operational amplifier under the action of
large-amplitude signals.
Picture 4 Output
Settling Response Curve
Application
Solution 1: High-Side Current Sensing
The following circuit diagram shows a high-side current
sensing circuit, which operates at a high common-mode input voltage close to
the power rail. High-side current sensing eliminates the ground interference
generated in the low-side sensing scheme and can also detect load open and
short-circuit faults.
Picture 5
High-Side Current Sensing
Application
Solution 2: Low-Side Current Sensing
The following circuit diagram shows a low-side current
sensing circuit, which operates at a low common-mode input voltage close to the
ground rail. Low-side current sensing has low requirements for OPA and features
a simple and easy-to-implement circuit.
Picture 6 Low-Side
Current Sensing
Application
Solution 3: Application as a Comparator
A comparator is used to distinguish between two different
signal levels. For example, a comparator can be used to distinguish between
overvoltage, undervoltage, and normal operating states. The AWS79062-Q1 can be
used as a comparator, featuring rail-to-rail input and output stages, with an
input common-mode range exceeding the power rail by 100mV.
Picture 7
Comparator Application
Product Selection
Table
AWINIC focuses on the design of high-performance
digital-analog mixed-signal, power management, signal chain, and other ICs,
mastering core chip design technologies. The AWINIC operational amplifier
product family will successively launch a variety of high-quality products with
high voltage, high precision, zero drift, and other performances, committed to
providing customers with comprehensive products and solutions.
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