LT1635 - Micropower Rail-to-Rail Op Amp and Reference


  • Guaranteed Operation at 1.2V
  • Op Amp and Reference on Single Chip
  • Micropower: 130µA Supply Current
  • Industrial Temperature Range SO-8 Packages
  • Rail-to-Rail Output
  • High Output Current: 20mA Min
  • Output Drives 1000pF
  • Capable of Floating Mode Operation
  • Specified for 5V and ±5V Supplies
  • Low Reference Drift: 30ppm/°C
  • Industry Standard LM10 Pinout

Typical Application

LT1635 Typical Application
LT1635 Typical Application


The LT1635 is a new analog building block that includes a rail-to-rail output opamp,a precision reference and reference buffer. The device operates from supplies as low as a single 1.2V or up to ±5V, yet it consumes only 130µA of supply current.

The input common mode range of the op amp includes ground and incorporates phase reversal protection to prevent false outputs from occurring when the input is below the negative supply. The rail-to-rail output stage can swing to within 15mV of each rail with no load and can swing to within 250mV of each rail while delivering 10mA of output current. The gain bandwidth of the op amp is 175kHz and it is unity-gain stable with up to 1000pF load capacitance.

The 0.2V reference is referred to V- and includes a buffer amplifier to enhance flexibility. The reference and buffer combine to achieve a drift of 30ppm/°C, a line regulation of 20ppm/ V and a load regulation of 150ppm/mA.

The LT1635 is available in 8-pin PDIP and SOpackages,and has the industry standard LM10 pinout.


CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

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

Part Number Package Code Temp Package
LT1635CN8#PBF N-8 N C 05-08-1510 (N8) Yes
LT1635CS8#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1635CS8#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1635IN8#PBF N-8 N I 05-08-1510 (N8) Yes
LT1635IS8#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LT1635IS8#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes

LT1635 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
LT1635CN8#PBF N-8 C $2.15 $1.75 Yes
LT1635CS8#PBF SO-8 C $2.40 $1.95 Yes
LT1635CS8#TRPBF SO-8 C $2.01 Yes
LT1635IN8#PBF N-8 I $2.65 $2.15 Yes
LT1635IS8#PBF SO-8 I $3.00 $2.40 Yes
LT1635IS8#TRPBF SO-8 I $2.46 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.

Part Number Description Price Documentation
DC417B DIP8, MS8, S8, SOT23-6 | Multi-Footprint General Purpose Board for Single Op. Amp $25.00
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Click here to view our complete list of demo boards


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