LT6657 Series

1.5ppm/°C Drift, Low Noise, Buffered Reference

Catalog

1.5ppm/°C Drift, Low Noise, Buffered Reference

Part	Voltage - Input [Max]	Voltage - Input [Min]	Output Type	Operating Temperature [Min]	Operating Temperature [Max]	Tolerance	Noise - 0.1Hz to 10Hz	Temperature Coefficient	Package / Case	Package / Case [custom]	Package / Case	Current - Output	Current - Supply	Reference Type	Noise - 10Hz to 10kHz	Voltage - Output (Min/Fixed)	Mounting Type	Supplier Device Package
Analog Devices LT6657AHMS8-5#PBF	40 V	5.5 V	1.81 mOhm	-40 °C	125 ¯C	0.1 %	0.5 ppmp-p	1.5 ppm/°C	8-MSOP 8-TSSOP	0.118 in	3 mm	10 mA	1.2 mA	Series	0.8 ppmrms	5 V	Surface Mount	8-MSOP
Analog Devices LT6657AHMS8-1.25#TRPBF	40 V	1.5 V	1.81 mOhm	-40 °C	125 ¯C	0.1 %	0.5 ppmp-p	1.5 ppm/°C	8-MSOP 8-TSSOP	0.118 in	3 mm	10 mA	1.2 mA	Series	0.8 ppmrms	1.25 V	Surface Mount	8-MSOP
Analog Devices LT6657BHMS8-5#TRPBF	40 V	5.5 V	1.81 mOhm	-40 °C	125 ¯C	0.1 %	0.5 ppmp-p	3 ppm/°C	8-MSOP 8-TSSOP	0.118 in	3 mm	10 mA	1.2 mA	Series	0.8 ppmrms	5 V	Surface Mount	8-MSOP
Analog Devices LT6657AHMS8-2.5#PBF	40 V	3 V	1.81 mOhm	-40 °C	125 ¯C	0.1 %	0.5 ppmp-p	1.5 ppm/°C	8-MSOP 8-TSSOP	0.118 in	3 mm	10 mA	1.2 mA	Series	0.8 ppmrms	2.5 V	Surface Mount	8-MSOP
Analog Devices LT6657BHMS8-5#PBF	40 V	5.5 V	1.81 mOhm	-40 °C	125 ¯C	0.1 %	0.5 ppmp-p	3 ppm/°C	8-MSOP 8-TSSOP	0.118 in	3 mm	10 mA	1.2 mA	Series	0.8 ppmrms	5 V	Surface Mount	8-MSOP
Analog Devices LT6657BHMS8-2.5#PBF	40 V	3 V	1.81 mOhm	-40 °C	125 ¯C	0.1 %	0.5 ppmp-p	3 ppm/°C	8-MSOP 8-TSSOP	0.118 in	3 mm	10 mA	1.2 mA	Series	0.8 ppmrms	2.5 V	Surface Mount	8-MSOP
Analog Devices LT6657BHMS8-4.096#PBF	36 V	4.596 V	1.81 mOhm	-40 °C	125 ¯C	0.1 %	0.5 ppmp-p	3 ppm/°C	8-MSOP 8-TSSOP	0.118 in	3 mm	10 mA	1.2 mA	Series	0.8 ppmrms	4.096 V	Surface Mount	8-MSOP

Catalog

1.5ppm/°C Drift, Low Noise, Buffered Reference

Key Features

• Low DriftA Grade: 1.5ppm/°C MaxB Grade: 3ppm/°C Max

• 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)

• 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

Description

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-Pnoise 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.ApplicationsHigh Temperature IndustrialHigh Resolution Data Acquisition SystemsInstrumentation and Process ControlAutomotive Control and MonitoringMedical EquipmentShunt and Negative Voltage References