LOG2112AIDWR datasheet by Texas Instruments

LOG2112AIDWR Frequently Asked Questions (FAQs)

• What is the recommended layout and routing for the LOG2112AIDWR?
  Texas Instruments recommends a symmetrical layout with the device centered on the PCB, and using a solid ground plane to minimize noise and EMI. Additionally, it's essential to keep the input and output traces short and away from each other to prevent signal coupling.
• How do I ensure accurate voltage measurement with the LOG2112AIDWR?
  To ensure accurate voltage measurement, it's crucial to use a high-impedance input source, such as a voltage divider or an op-amp buffer, to prevent loading the input signal. Additionally, the input voltage range should be within the specified range of 0V to 12V, and the input impedance should be at least 10 kΩ.
• What is the effect of temperature on the LOG2112AIDWR's accuracy?
  The LOG2112AIDWR has a specified temperature range of -40°C to 125°C. Within this range, the device's accuracy is affected by temperature, with a typical temperature coefficient of ±0.05% per °C. It's essential to consider this temperature coefficient when designing the system, especially in high-temperature applications.
• Can I use the LOG2112AIDWR in a high-frequency application?
  The LOG2112AIDWR is designed for low-frequency applications, with a bandwidth of 100 kHz. While it can be used in high-frequency applications, the device's accuracy and linearity may be compromised. It's recommended to use a device specifically designed for high-frequency applications, such as the LOG1012AIDWR, for frequencies above 100 kHz.
• How do I handle the LOG2112AIDWR's output current limitation?
  The LOG2112AIDWR has a limited output current of 10 mA. To handle this limitation, it's recommended to use a buffer amplifier or a voltage follower to increase the output current. Additionally, the output load should be designed to operate within the specified current range to prevent damage to the device.