Texas Instruments LM4040 Precision Micropower Voltage References
Texas Instruments LM4040 Precision Micropower Shunt Voltage References are versatile, easy-to-use devices for many applications. The 2-pin fixed-output LM4040 needs no external capacitors and is stable with all capacitive loads. Furthermore, the references deliver low dynamic impedance, noise, and temperature coefficients to support a stable output voltage over a wide range of operating currents and temperatures.
The TI LM4040 uses fuse and Zenerzap reverse breakdown voltage trim during wafer sort to offer four output voltage tolerances, ranging from 0.1% (maximum) for the A grade to 1% (maximum) for the D grade. These features allow flexibility in selecting the best cost-to-performance ratio for applications.
The LM4040 is available in space-saving SC-70 and SOT-23-3 packages and requires a minimum current of 45μA. These parameters make the LM4040 ideal for portable applications. The LM4040xI is characterized for operation over an ambient temperature range of -40°C to +85°C.
Features
- Fixed output voltages of 2.048V, 2.5V, 3V, 4.096V, 5V, 8.192V, and 10V
- Low output noise of 35μVRMS typical
- Wide operating current range of 45μA typical to 15mA
- Stable with all capacitive loads; no output capacitor required
- Available in extended temperature range of -40°C to +125°C
- Tight output tolerances and low-temperature coefficient
- Maximum 0.1%, 100ppm/°C – A Grade
- Maximum 0.2%, 100ppm/°C – B Grade
- Maximum 0.5%, 100ppm/°C – C Grade
- Maximum 1.0%, 150ppm/°C – D Grade
Applications
- Data-Acquisition Systems
- Energy infrastructure
- Analog input module
- Field transmitters
- Precision audio
- Automotive electronics
Associated Products
Texas Instruments LM4040-N/-Q1 Micropower Shunt Voltage References
Ideal for space-critical applications, design effort reduced by several features.
Simplified Schematic
Inilathala: 2025-01-07
| Na-update: 2025-05-06