Description/Ordering Information The LM4040 series of shunt voltage references are versatile, easy-to-use references catering to large array applications. 2-pin fixed output devices require operation without external capacitors and with all stable capacitive loads. In addition, this reference offers low dynamic impedance, low noise, and low temperature coefficient to ensure stable output voltage over a range of operating current and temperature. The LM4040 uses fuses and zener reverse breakdown voltage adjustment ZAP on wafer to provide four output voltage tolerances, from 0.1% Class A (max) to 1% Class D (max). Therefore, a great deal of flexibility is provided to the designer in choosing the best cost-to-performance ratio for the application. Packaged in space-saving SC-70 and SOT-23-3 packages and requiring a minimum current of about 45 mA (typ), the LM4040 is also ideal for portable applications. The LM4040xI is characterized to operate over an ambient temperature range of -40°C to 85°C and the LM4040xQ is characterized to operate over an ambient temperature range of -40°C to 125°C

Features 2.048V, 2.5V, 3V fixed output voltage, 4.096V, 5V and 10V Tight output and low tolerance temperature coefficient
- 0.1% max at 100 ppm/°C - Class A
- 0.2% max at 100 ppm/°C - Class B
- 0.5% max at 100 ppm/°C - Class C
- 1.0% max, 150 ppm/°C-Class D Low output noise typical ¼35 mVRMS
Wide operating current range from approximately 45 mA to ¼15 mA typical Stable with all capacitive loads; used on no output capacitors Available over extended temperature ¼ range -40°C to 125°C
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