Describes the micropower voltage LM385/385B bandgap reference two-terminal reference diode designed and optimized for accurate low-power operation in portable and other power-sensitive systems. Operating current is guaranteed to be as low as 15µA up to 20mA for the LM385/385B-1.2, and 20µA for the LM385/385B-2.5 up to 20mA, giving designers great flexibility in optimizing power consumption, noise and eventual application performance. With an added feature, the reference output impedance is very low quiescent current over the entire operating range. This enables overall reference accuracy over a fairly wide dynamic load range with little effect. The LM385 series offers fixed 1.2V and 2.5V reference values. Process circuit design and optimization provides high accuracy with initial tolerance values of 1% for the LM385B- 1.2, 2% for the LM385- 1.2, 1.5 times for the LM385B- 2.5%, and 3% for the LM385- 2.5. Complementing its initial accuracy, the bandgap reference temperature is compensated by 20ppm, providing performance over the 0° to 70°C operating temperature range. The LM385 family from Linfinity is a pin-to-pin replacement for the LM385/385B series of voltage references.

Applications Portable Energy Meters Reference Portable Test Instruments Battery-Powered System Level Current Loop Instrumentation

Key Features Guaranteed 1% Initial Accuracy (LM385B-1.2)
Guaranteed 2.5% initial accuracy (LM385-1.2)
Guaranteed 1.5% initial accuracy (LM385B-2.5)
Guaranteed 3% initial accuracy (LM385-2.5)
Guaranteed operating current is 20µA
Low temperature coefficient operating at 20µA to 20mA current very low dynamic impedance.....1 watt