LF398N

The LF398N is a monolithic sample-and-hold IC in an 8-pin DIP package. In sample mode its output follows the input signal; when the logic input switches to hold, it stores the voltage on an external hold capacitor and keeps the output steady. This lets an ADC or other circuit measure a fast-changing analog signal at an exact moment in time.

LF398N Specifications

• Function: sample-and-hold amplifier, BiFET technology
• Supply voltage: ±5 V to ±18 V
• Acquisition time: less than 10 µs
• Gain accuracy: 0.002% (typical)
• Hold step: 0.5 mV typical with a 0.01 µF hold capacitor
• Logic input: compatible with TTL, PMOS and CMOS levels
• Package: 8-pin DIP (N suffix)

LF398N Applications

• Holding signals steady for analog-to-digital conversion
• Multiplexed data acquisition systems
• Capturing levels in test and measurement equipment
• Deglitching DAC outputs
• Analog signal processing experiments and university labs

What's in the Box

• 1 × LF398N sample-and-hold IC

Tip: Use a low-leakage polystyrene or polypropylene capacitor as the hold capacitor. A larger capacitor reduces droop and hold step but makes acquisition slower. Decouple both supply pins with 100 nF capacitors placed close to the chip.

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.