Overview
The CS8190EDWFR20G, produced by ON Semiconductor, is a precision air-core tachometer/speedometer driver designed specifically for use with air-core meter movements. This integrated circuit (IC) provides all the necessary functions for an analog tachometer or speedometer, including the ability to take a speed sensor input and generate sine and cosine related output signals to differentially drive an air-core meter.
The CS8190 offers several enhancements over industry standard tachometer drivers, such as the CS289 or LM1819. It features differential drivers that eliminate the need for a zener reference, providing more torque and precision. The device is also capable of withstanding 60 V transients, reducing the need for additional protection circuitry.
Key Specifications
| Characteristic | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage, VCC | - | 8.5 | 16 | V |
| Operating Temperature | -40 | - | 105 | °C |
| Storage Temperature | -40 | - | 165 | °C |
| Junction Temperature | -40 | - | 150 | °C |
| ESD (Human Body Model) | - | - | 4.0 | kV |
| ICC Supply Current (VCC = 16 V, -40°C, No Load) | - | 50 | 125 | mA |
| Input Frequency Range | - | - | 20 | kHz |
| Output Voltage (Voltage Regulator) | 6.25 | 7.00 | 7.50 | V |
| Output Load Current (Voltage Regulator) | - | - | 10 | mA |
Key Features
- Direct Sensor Input
- High Output Torque
- Low Pointer Flutter
- High Input Impedance
- Overvoltage Protection
- Return to Zero Function
- Internally Fused Leads in PDIP-16 and SO-20W Packages
- Pb-Free, Halogen Free/BFR Free and RoHS Compliant
Applications
The CS8190 is primarily used in analog tachometers and speedometers, particularly those employing air-core meter movements. It is suitable for automotive and industrial applications where precise speed measurement is required.
Additional applications include:
- Speedometer circuits
- Tachometer circuits
- Odometer circuits when combined with other ICs like the CS8441
- Any system requiring precise and robust speed sensing and display.
Q & A
- What is the primary function of the CS8190?
The CS8190 is a precision air-core tachometer/speedometer driver designed to take a speed sensor input and generate sine and cosine related output signals to differentially drive an air-core meter.
- What are the key enhancements of the CS8190 over industry standard tachometer drivers?
The CS8190 features differential drivers that eliminate the need for a zener reference, provides more torque, and is more precise, allowing for fewer trims and robust operation in speedometers.
- What is the operating temperature range of the CS8190?
The operating temperature range of the CS8190 is -40°C to 105°C.
- What is the maximum ESD rating for the CS8190?
The CS8190 has an ESD rating of 4.0 kV (Human Body Model).
- What is the typical supply current of the CS8190 at 16 V and -40°C?
The typical supply current is 50 mA.
- What is the input frequency range of the CS8190?
The input frequency range is up to 20 kHz.
- How does the CS8190 provide overvoltage protection?
The CS8190 can withstand 60 V transients, reducing the need for additional protection circuitry.
- What is the return to zero function in the CS8190?
The return to zero function ensures that the meter pointer returns to the zero position when power is removed or the input signal is lost.
- Is the CS8190 RoHS compliant?
Yes, the CS8190 is Pb-Free, Halogen Free/BFR Free and RoHS compliant.
- What are the typical output voltages of the voltage regulator in the CS8190?
The typical output voltage of the voltage regulator is between 6.25 V and 7.50 V.
