LD209a DIP IC

🔹 LD209A DIP IC – Metal Proximity Detector ASIC (CS209A Replacement)

The LD209A is a bipolar monolithic integrated circuit designed for metal detection and proximity sensing applications, serving as a direct replacement for the CS209A. It integrates two on-chip current regulators, an oscillator with low-level feedback, a peak demodulator, a comparator, and two complementary open-collector output stages.

✅ Specifications:

• Function: Metal Proximity Detector / Inductive Sensor IC

• Package: DIP-8 (also available in SOP-8/SOP-14)

• Supply Voltage (VCC): 4V – 24V

• Supply Current: 6mA typical @ VCC = 12V

• Output Type: Complementary Open-Collector (sink 20mA @ 4VCC, 100mA @ 24VCC)

• Detection Threshold: 1440mV typical

• Release Threshold: 1200mV typical

• Operating Temperature: -40°C to +150°C

• Power Dissipation: <200mW (TA = 125°C)

• Replacement For: CS209A

📦 Features:
✔️ Integrated oscillator with external LC tank for adjustable detection range
✔️ Variable low-level feedback maintains oscillation in low-Q conditions
✔️ Peak demodulator senses negative envelope for reliable metal detection
✔️ Built-in negative transient suppression at tank terminal
✔️ Improved thermal performance with overheat protection

📦 Applications:
✔️ Automotive speed sensor circuits
✔️ Metal proximity detection and inductive sensing
✔️ Rotating gear tooth detection
✔️ Industrial position and presence sensing
✔️ Replacement for CS209A-based designs