Overview
The CS8190ENF16, produced by onsemi, 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 direct sensor input, high output torque, and low pointer flutter. The CS8190 enhances industry standard tachometer drivers by utilizing differential drivers, eliminating the need for a zener reference, and offering more torque. It also withstands 60 V transients, reducing the protection circuitry required, and is more precise than existing devices, allowing for fewer trims and use in speedometers.
Key Specifications
| Characteristic | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage, VCC | < 100 ms Pulse Transient | - | - | 60 | V |
| Supply Voltage, VCC | Continuous | - | - | 24 | 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 |
| VCC Normal Operation Range | - | 8.5 | - | 16 | V |
| Positive Input Threshold | - | 1.0 | 2.0 | 3.0 | V |
| Input Hysteresis | - | 200 | 500 | - | mV |
| Output Voltage (VREG) | - | 6.25 | 7.00 | 7.50 | V |
Key Features
- Direct Sensor Input: The CS8190 accepts input directly from speed sensors.
- High Output Torque: Differential drivers provide higher torque, eliminating the need for a zener reference.
- Low Pointer Flutter: Reduces ripple voltage on the output, minimizing pointer or needle flutter.
- High Input Impedance: Ensures minimal loading on the input signal.
- Overvoltage Protection: Withstands 60 V transients, reducing the need for additional protection circuitry.
- Return to Zero: Ensures the meter pointer returns to the zero position when power is removed.
- Internally Fused Leads: Available in PDIP-16 and SO-20W packages with internally fused leads for added reliability.
Applications
- Speedometers: Ideal for use in automotive and industrial speedometers due to its precision and high output torque.
- Tachometers: Suitable for tachometer applications requiring accurate and stable output signals.
- Air-Core Meter Movements: Specifically designed to drive air-core meter movements, providing differential output signals.
- Industrial Automation: Can be used in various industrial automation applications where precise speed measurement is critical.
Q & A
- What is the primary function of the CS8190?
The CS8190 is a precision air-core tachometer/speedometer driver designed to generate sine and cosine related output signals to drive an air-core meter.
- What are the key enhancements of the CS8190 over industry standard tachometer drivers?
The CS8190 offers differential drivers, eliminates the need for a zener reference, provides more torque, withstands 60 V transients, and is more precise than existing devices.
- What is the operating temperature range of the CS8190?
The operating temperature range is -40°C to +105°C.
- What is the storage temperature range of the CS8190?
The storage temperature range is -40°C to +165°C.
- What is the typical supply current of the CS8190 at VCC = 16 V and -40°C?
The typical supply current is 50 mA.
- How does the CS8190 handle overvoltage protection?
The CS8190 withstands 60 V transients, reducing the need for additional protection circuitry.
- What is the purpose of 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.
- What types of packages are available for the CS8190?
The CS8190 is available in PDIP-16 and SO-20W packages.
- How does the CS8190 reduce pointer flutter?
The CS8190 reduces pointer flutter by minimizing ripple voltage on the output signals.
- Can the CS8190 be used in industrial automation applications?
Yes, the CS8190 can be used in various industrial automation applications where precise speed measurement is critical.
