1N935BUR-1 1N938BUR-1 CDLL935 CDLL938B Qualified Levels: Temperature Compensated JAN, JANTX, Available on Zener Reference Diodes JANTXV and JANS commercial versions Qualified per MIL-PRF-19500/156 DESCRIPTION The popular 1N935BUR-1 through 1N938BUR-1 series of Zero-TC (Temperature Compensated) reference diodes provides a selection of 9.0 V nominal voltages and o temperature coefficients to as low as 0.001 %/ C for minimal voltage change with temperature when operated at 7.5 mA. These glass surface mount DO-213AA reference diodes are also available in JAN, JANTX, JANTXV and JANS military qualifications. For commercial applications it is also available as RoHS compliant (not applicable to military). DO-213AA MELF Important: For the latest information, visit our website 1N935BUR-1 1N938BUR-1 CDLL935 CDLL938B MECHANICAL and PACKAGING CASE: Hermetically sealed glass case package. TERMINALS: Tin/lead plated or RoHS compliant matte-tin (on commercial grade only) over copper clad steel. Solderable per MIL-STD-750, method 2026. POLARITY: Cathode end is banded. MOUNTING: The axial coefficient of expansion (COE) of this device is approximately +6PPM/C. The COE of the mounting surface system should be selected to provide a suitable match with this device. MARKING: Part number. TAPE & REEL option: Standard per EIA-296. Consult factory for quantities. WEIGHT: Approximately 0.04 grams. See Package Dimensions on last page. PART NOMENCLATURE JAN 1N935 B UR -1 e3 Reliability Level* RoHS Compliance JAN = JAN Level e3 = RoHS compliant (available JANTX = JANTX Level on commercial grade only) JANTXV = JANTXV Level Blank = non-RoHS compliant JANS = JANS Level Blank = Commercial Metallurgical Bond *(available on B suffix only) MELF Surface Mount JEDEC type number (see Electrical Characteristics Temperature Range table) Blank = 0 to +75 C A = -55 to +100 C B = -55 to +150 C (required for JAN level) SYMBOLS & DEFINITIONS Symbol Definition I Maximum Zener Current: The maximum rated dc current for the specified power rating. ZM I , I , I Regulator Current: The dc regulator current (I ), at a specified test point (I ), near breakdown knee (I ). Z ZT ZK Z ZT ZK V Zener Voltage: The Zener voltage the device will exhibit at a specified current (I ) in its breakdown region. Z Z Dynamic Impedance: The small signal impedance of the diode when biased to operate in its breakdown region at a Z or Z ZT ZK specified rms current modulation (typically 10% of I or I ) and superimposed on I or I respectively. ZT ZK ZT ZK T4-LDS-0158, Rev. 2 (121998) 2013 Microsemi Corporation Page 2 of 6