DT 670
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■ Best accuracy across the widest useful temperature silicon diode to date ■ Rugged, reliable Lake Shore withstand repeated thermal cycling and minimize sensor ■ Variety of packaging options ■ Bare die sensors with the smallest size and fastest thermal response time of any silicon diode on the market ■ Exposed flat substrate Silicon Diodes DT-670 Series Silicon Diodes offer better accuracy over a wider temperature range than any previously marketed silicon diodes. Conforming to the Curve DT-670 standard voltage versus temperature response curve, sensors within the DT-670 series are interchangeable, and for many applications do not require individual package are available in four tolerance bands - three for general cryogenic use range, and one that offers superior accuracy for applications from 30 K to room temperature. DT-670 sensors also come in a seventh tolerance band, Band E, which are available only as bare die. For applications requiring greater accuracy, DT-670-SD diodes are available with calibration across the full 1.4 K to CAUTION: These sensors are sensitive to precautionary procedures when handling, or making mechanical or electrical connections to these devices in order to avoid performance degradation or loss of provides the smallest physical size and fastest thermal response time of any silicon diode on the market today. This is an important advantage for applications where size and thermal response time are critical, including focal plane arrays and high temperature superconducting filters Typical DT-670 Diode Voltage Values The Lake Shore SD Package - The Most Rugged, Versatile The SD package, with direct sensor-to- sapphire base mounting, hermetic seal, and brazed Kovar leads, provides the industry's most rugged, versatile sensors with the best sample to chip connection. Designed so heat coming down the leads bypasses the chip, it can survive several thousand hours at 500 K (depending on model) and is compatible with most ultra high vacuum applications. It can be indium soldered to samples without shift in sensor calibration. If desired, the SD package is also available without Kovar leads. DT-621-HR Miniature Silicon Diode The DT-621 miniature silicon diode temperature sensor is configured for installation on flat surfaces. The DT- 621 sensor package exhibits precise, monotonic temperature response over its useful range. The sensor chip is in direct contact with the epoxy dome, which causes increased voltage below 20 K and prevents full range Typical DT-670 Diode Sensitivity Values temperature (keLvin) temperature (keLvin) Lake Shore Cryotronics, Inc. e-mail: info@lakeshore.com

Silicon Diodes Standard curve Curve DT-670 - see next page Max current before damage 1 mA continuous Dissipation at recommended excitation Thermal response time SD: typical <10 ms at 4.2 K, Use in radiation Recommended for use only in low level Use in magnetic field Not recommended for use in magnetic field applications below 60 K. Low magnetic field dependence when used in fields up to 5 tesla ' Short-term reproducibility data is obtained by subjecting sensor to repeated thermal shocks Calibrated Accuracy Temperature Response Data Table (typical) See Appendix G for expanded response table...

Silicon Diodes For information on mounting adapters available for use with the SD package, see page 25. CO adapter — spring loaded clamp for easy sensor interchangeability Ordering Information Uncalibrated sensor Step 1: Choose diode series, for example DT-670. Step 2: Choose tolerance band (if applicable), for example DT-670A. Step 3: Choose package or mounting adapter – if ordering adapter, substitute the adapter suffix for the SD suffix, for example DT-670A-CU. Calibrated sensor Step 1: Choose diode series, for example DT-670. Step 2: Choose package or mounting adapter – if ordering...