Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages The LM4040BIX3-2.1 is a precision voltage reference manufactured by Texas Instruments (formerly National Semiconductor, NS).  

### **Specifications:**  
- **Output Voltage:** 2.1V  
- **Tolerance:** ±0.1% (A-grade)  
- **Temperature Coefficient:** 20ppm/°C (typical)  
- **Operating Current Range:** 60µA to 15mA  
- **Package Type:** SOT-23 (3-pin)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Long-Term Stability:** 20ppm/1000hrs (typical)  
- **Line Regulation:** 0.2mV (typical)  
- **Load Regulation:** 0.1mV (typical)  

### **Descriptions:**  
The LM4040BIX3-2.1 is a high-precision, low-power shunt voltage reference that provides a stable 2.1V output. It is designed for applications requiring tight voltage accuracy and low temperature drift.  

### **Features:**  
- **High Accuracy:** ±0.1% initial tolerance  
- **Low Noise:** Low output noise performance  
- **Wide Operating Current:** 60µA to 15mA  
- **Small Form Factor:** SOT-23 package for space-constrained designs  
- **No Output Capacitor Required:** Stable without external compensation  
- **Reverse Breakdown Protection:** Protects against accidental reverse bias  

This device is commonly used in precision analog circuits, data converters, power supplies, and battery-powered systems.

Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages