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LF398

Precision Sample and Hold Amplifier

Partnumber Manufacturer Quantity Availability
LF398 88 In Stock

Description and Introduction

Precision Sample and Hold Amplifier The LF398 is a monolithic sample-and-hold integrated circuit manufactured by various companies, including Texas Instruments and National Semiconductor. Below are its key specifications, descriptions, and features:

### **Specifications:**
1. **Supply Voltage Range:** ±5V to ±18V  
2. **Input Voltage Range:** ±10V (with ±15V supplies)  
3. **Hold Capacitor Range:** 0.001µF to 0.1µF (external)  
4. **Acquisition Time:**  
   - 6µs (to 0.1% with 0.01µF capacitor)  
   - 20µs (to 0.01% with 0.01µF capacitor)  
5. **Droop Rate:** 0.5mV/ms (with 1µF hold capacitor)  
6. **Gain Error:** ±0.002% (typical)  
7. **Nonlinearity:** ±0.006% (typical)  
8. **Operating Temperature Range:** -25°C to +85°C (commercial)  
   -55°C to +125°C (military)  

### **Description:**  
The LF398 is a high-performance sample-and-hold amplifier designed for precision analog signal acquisition. It features a fast acquisition time, low droop rate, and high accuracy, making it suitable for data conversion, signal processing, and instrumentation applications.  

### **Features:**  
- **Low Droop Rate:** Minimizes voltage decay during hold mode.  
- **High Accuracy:** Low gain error and nonlinearity for precise signal retention.  
- **Wide Bandwidth:** Operates effectively in high-speed applications.  
- **Low Input Offset Voltage:** Ensures minimal signal distortion.  
- **Internal Hold Capacitor Drive:** Simplifies external circuit design.  
- **TTL, PMOS, and CMOS Logic Compatible:** Flexible control input options.  
- **Operates from Dual or Single Supply:** Supports ±5V to ±18V or +5V to +36V.  

The LF398 is commonly used in analog-to-digital converters (ADCs), digital voltmeters, and data acquisition systems.

Application Scenarios & Design Considerations

Precision Sample and Hold Amplifier

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