The LT6657 is a precision voltage reference that combines robust operating characteristics with extremely low drift and low noise. With advanced curvature compensation, this bandgap reference achieves 1.5ppm/°C drift with predictable temperature behavior, and an initial voltage accuracy of 0.1%. It also offers 0.5ppmP-P noise and very low temperature cycling hysteresis.
The LT6657 is a low dropout reference that can be powered from as little as 50mV above the output voltage, up to 40V. The buffered output supports ±10mA of output drive with low output impedance and precise load regulation. The high sink current capability allows operation as a negative voltage reference with the same precision as a positive reference. This part is safe under reverse battery conditions, and includes current protection when the output is short-circuited and thermal shutdown for overload conditions. A shutdown is included to allow power reduction while enabling a quick turn-on.
The LT6657 is fully specified over the temperature range of –40°C to 125°C. It is available in the 8-lead MSOP package.
Feature
- Low Drift
- A Grade: 1.5ppm/°C Max
- B Grade: 3ppm/°C Max
- Low Noise:
- 0.5ppmP-P (0.1Hz to 10Hz)
- 0.8ppmRMS (10Hz to 1kHz)
- Wide Supply Range to 40V
- Sources and Sinks 10mA Min
- Line Regulation: 0.2ppm/V
- Load Regulation: 2μV/mA
- Reverse Supply Protection
- Reverse Output Protection
- Low Power Shutdown: <4μA Max
- 1.5V Min Supply for 1.25V Option
- Thermal Protection
- Can Operate in Shunt Mode
- Configurable as a Negative Reference
- Available Output Voltage Options: 1.25V, 2.5V, 3V, 4.096V, 5V
- MSOP-8 Package
Applications
- High Temperature Industrial
- High Resolution Data Acquisition Systems
- Instrumentation and Process Control
- Automotive Control and Monitoring
- Medical Equipment
- Shunt and Negative Voltage References
