LT6650 - Micropower, 400mV Reference with Rail-to-Rail Buffer Amplifier in SOT-23


  • Low Quiescent Current 5.6µA (typical)
  • Wide Supply Range: 1.4V to 18V
  • 400mV Reference ±1% Maximum Accuracy Over Temperature at 5V
  • Rail-to-Rail Buffer Amplifier
  • 0.5% 400mV Maximum Initial Accuracy at 5V
  • Shunt Configurable
  • Sinks and Sources Current
  • Wide Operational Range –40°C to 125°C
  • Externally Adjustable Output Voltage
  • Low Profile 1mm 5-lead SOT-23 (ThinSOT™) Package

Typical Application

LT6650 Typical Application
LT6650 Typical Application


The LT6650 is a micropower, low voltage 400mV reference. Operating with supplies from 1.4V up to 18V, the device draws only 5.6µA typical, making it ideal for low voltage systems as well as handheld instruments and industrial control systems. With only two resistors the internal buffer amplifier can scale the 400mV reference to any desired value up to the supply voltage.

The reference is post package-trimmed to increase the output accuracy. The output can sink and source 200µA over temperature. Quiescent power dissipation is 28µW. Stability is ensured with any output capacitor of 1µF or higher.

The LT6650 is the lowest voltage series reference available in the 5-lead SOT-23 package.


For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
LT6650CS5 SOT-23 S5 C 05-08-1635 RoHS
LT6650CS5#PBF SOT-23 S5 C 05-08-1635 RoHS
LT6650CS5#TR SOT-23 S5 C 05-08-1635 RoHS
LT6650CS5#TRM SOT-23 S5 C 05-08-1635 RoHS
LT6650CS5#TRMPBF SOT-23 S5 C 05-08-1635 RoHS
LT6650CS5#TRPBF SOT-23 S5 C 05-08-1635 RoHS
LT6650HS5 SOT-23 S5 H 05-08-1635 RoHS
LT6650HS5#PBF SOT-23 S5 H 05-08-1635 RoHS
LT6650HS5#TR SOT-23 S5 H 05-08-1635 RoHS
LT6650HS5#TRM SOT-23 S5 H 05-08-1635 RoHS
LT6650HS5#TRMPBF SOT-23 S5 H 05-08-1635 RoHS
LT6650HS5#TRPBF SOT-23 S5 H 05-08-1635 RoHS
LT6650IS5 SOT-23 S5 I 05-08-1635 RoHS
LT6650IS5#PBF SOT-23 S5 I 05-08-1635 RoHS
LT6650IS5#TR SOT-23 S5 I 05-08-1635 RoHS
LT6650IS5#TRM SOT-23 S5 I 05-08-1635 RoHS
LT6650IS5#TRMPBF SOT-23 S5 I 05-08-1635 RoHS
LT6650IS5#TRPBF SOT-23 S5 I 05-08-1635 RoHS

LT6650 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
LT6650CS5 SOT-23 C $3.76 No
LT6650CS5#PBF SOT-23 C $1.88 Yes
LT6650CS5#TR SOT-23 C $3.76 $2.50 No
LT6650CS5#TRM SOT-23 C $3.76 $2.54 No
LT6650CS5#TRMPBF SOT-23 C $1.88 $1.27 Yes
LT6650CS5#TRPBF SOT-23 C $1.88 $1.25 Yes
LT6650HS5 SOT-23 H $4.82 No
LT6650HS5#PBF SOT-23 H $2.41 Yes
LT6650HS5#TR SOT-23 H $4.82 $3.38 No
LT6650HS5#TRM SOT-23 H $4.82 $3.42 No
LT6650HS5#TRMPBF SOT-23 H $2.41 $1.71 Yes
LT6650HS5#TRPBF SOT-23 H $2.41 $1.69 Yes
LT6650IS5 SOT-23 I $4.82 No
LT6650IS5#PBF SOT-23 I $2.41 Yes
LT6650IS5#TR SOT-23 I $4.82 $3.38 No
LT6650IS5#TRM SOT-23 I $4.82 $3.42 No
LT6650IS5#TRMPBF SOT-23 I $2.41 $1.71 Yes
LT6650IS5#TRPBF SOT-23 I $2.41 $1.69 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards


  • Battery-Operated Systems
  • Handheld Instruments
  • Industrial Control Systems
  • Data Acquisition Systems
  • Negative Voltage References

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