ADI LT6657AHMS8-1.25#PBF

The LT6657 is a precision voltage reference combining robust operation with ultralow drift and low noise. Using advanced curvature correction, this bandgap reference achieves 1.5ppm/°C drift with predictable temperature characteristics and 0.1% initial accuracy. It also provides 0.5ppmₚ₋ₚ noise and very low temperature cycling hysteresis.

The LT6657 is a low dropout voltage reference that can be powered by a supply as little as 50mV above the output voltage (up to 40V). The buffered output supports ±10mA output drive (under low output impedance conditions) with precise load regulation. High source current capability allows it to be used as a negative voltage reference with the same accuracy as a positive reference. The device is safe under reverse battery conditions and includes built-in output short-circuit current protection and overload thermal shutdown. A shutdown mode is included to reduce power consumption while enabling fast turn-on.

The LT6657 is rated over a -40°C to 125°C temperature range and is available in an 8-pin MSOP package.

• Low drift: Grade A: 1.5ppm/°C (max); Grade B: 3ppm/°C (max)
• Low noise: 0.5ppmₚ₋ₚ (0.1Hz to 10Hz); 0.8ppm RMS (10Hz to 1kHz)
• Wide supply voltage range (up to 40V)
• Source and sink current 10mA (min)
• Line regulation: 0.2ppm/V
• Load regulation: 2μV/mA
• Reverse supply protection
• Reverse output protection
• Low-power shutdown mode: <4μA (max)
• 1.5V minimum supply voltage (for 1.25V option)
• Thermal protection
• Shunt mode operation
• Configurable as negative voltage reference
• Output voltage options: 1.25V, 2.5V, 3V, 4.096V, and 5V
• MSOP-8 package

• High-temperature industrial
• High-resolution data acquisition systems
• Instrumentation and process control
• Automotive control and monitoring
• Medical equipment
• Shunt and negative reference voltage sources