LT6656 Datasheet

• Ultralow Supply Current: 850nA
• Low Drift
  • A Grade: 10 ppm/°C Max
  • B Grade: 20 ppm/°C Max
• High Accuracy
  • A Grade: 0.05% Max
  • B Grade: 0.1% Max
• Long-Term Drift: 15ppm/√kHr (LS8 Package)
• No Humidity Sensitivity (LS8 Package)
• High Output Drive Current: 5mA Min
• Low Dropout Voltage: 10mV Max
• Fully Specified from –40°C to 85°C
• Operational from –55°C to 125°C
• Wide Supply Range to 18V
• Reverse Input/Output Protection
• Available Output Voltage Options: 1.25V, 2.048V, 2.5V, 2.8V, 3V, 3.3V, 4.096V and 5V
• Available in Low Profile (1mm) ThinSOT^™, (2mm × 2mm) DFN and High Stability Hermetic (5mm × 5mm) LS8 Packages

• Precision A/D and D/A Converters
• Portable Gas Monitors
• Battery- or Solar-Powered Systems
• Precision Regulators
• Low Voltage Signal Processing
• Micropower Remote Sensing

The LT6656 is a tiny precision voltage reference that draws less than 1μA of supply current and can operate with a supply voltage within 10mV of the output voltage. The LT6656 offers an initial accuracy of 0.05% and temperature drift of 10ppm/°C. The combined low power and precision characteristics are ideal for portable and battery powered instrumentation.

The LT6656 can supply up to 5mA of output drive with 65ppm/mA of load regulation, allowing it to be used as the supply voltage and the reference input to a low power ADC. The LT6656 can accept a supply voltage up to 18V and withstand the reversal of the input connections.

The LT6656 output is stable with 1μF or larger output capacitance and operates with a wide range of output capacitor ESR.

This reference is fully specified for operation from –40°C to 85°C, and is functional over the extreme temperature range of –55°C to 125°C. Low hysteresis and a consistent temperature drift are obtained through advanced design, processing and packaging techniques.

The LT6656 is offered in the 6-lead SOT-23, (2mm × 2mm) DFN, and 8-lead LS8 Packages. The LS8 is a 5mm × 5mm surface mount hermetic package that provides outstanding stability.