The LT1461 is a family of low dropout micropower bandgap references that combine very high accuracy and low drift with low supply current and high output drive. These series references use advanced curvature compensation techniques to obtain low temperature coefficient and trimmed precision thin-film resistors to achieve high output accuracy. The LT1461 family draws only 35µA of supply current, making them ideal for low power and portable applications, however their high 50mA output drive makes them suitable for higher power requirements, such as precision regulators. In low power applications, a dropout voltage of less than 300mV ensures maximum battery life while maintaining full reference performance. Line regulation is nearly immeasur- able, while the exceedingly good load and thermal regulation will not add significantly to system error budgets. The shutdown feature can be used to switch full load currents and can be used for system power down. Thermal shutdown protects the part from overload conditions.
The LT1461 family provides high‑accuracy voltage references for low‑power and portable applications. It combines a trimmed 0.04 % maximum accuracy with a low temperature coefficient of 3 ppm/°C and a low supply current of 50 µA, while still delivering up to 50 mA of output current.
Typical applications include A/D and D/A converters, precision regulators, handheld instruments and power supplies. The device operates over a wide temperature range (‑40 °C to 125 °C) and is available in several voltage options (2.5 V, 3 V, 3.3 V, 4.096 V, 5 V).
| Accuracy (typical) | 0.04 % Max |
|---|---|
| Temperature Coefficient | 3 ppm/°C Max |
| Supply Current (no load) | 50 µA Max |
| Output Current | 50 mA Min |
| Dropout Voltage | 300 mV Max |
| Operating Temperature Range | ‑40 °C to 125 °C |
| Available Voltage Options | 2.5 V, 3 V, 3.3 V, 4.096 V, 5 V |
The LT1461 draws a maximum of 50 µA supply current.
The dropout voltage is specified as up to 300 mV.
It is guaranteed to function from –40 °C to 125 °C.
The device can source a minimum of 50 mA output current.