HT336AR-25

HT336AR-25 HT336AT-25 HT336A-25 Programmable Shunt Regulator General Description The HT336A-25 integrated circuits are precision 2.5V shunt reg-ulators. The monolithic IC voltage reference operates as a low temperature coefficient 2.5V zener with 0.2W dynamic imped-ance. The monolithic IC voltage reference operates as a low temperature coefficient 2.5V zener with 0.2W dynamic imped-ance. A third terminal on the HT336A-25 allows the reference voltage and temperature coefficient to be trimmed easily. HT336A-25 are useful as a precision 2.5V low voltage reference for digital voltmeters, power supplies or OP-AMP circuitry. The 2.5V makes it convenient to obtain a stable reference from low voltage supplies. Further, since the HT336A-25 operate as shunt regulators, they can be used as either a positive or negative voltage reference. NC NC NC ANODE 1 8 2 7 3 6 4 5 CATHODE NC NC ADJ Features O Low Temperature Coefficient O Guaranteed Temperature Stability 4mV Typical O 0.2W Dynamic Impedance O 1.0% Initial Tolerance Available O Easily Trimmed for Minimum Temperature Drift ANODE CATHODE ADJ HT336AR-25 HT336AT-25 SOP8 TO92 Rev. 01 HT336AR-25 HT336AT-25 Internal Block Diagram Rev. 01 HT336AR-25 HT336AT-25 Absolute Maximum Ratings(Note 1) Parameter Reverse Current Forward Current Symbol Value Unit IR 15 mA 10 mA IF Operating Temperature Range HT336A-25 Storage Temperature Range TOPR HT236A-25 qC -45~85  TSTG qC 60 ~150 Note 1: The Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum rating. Electrical Characteristics Parameter Reverse Breakdown Voltage Symbol VR Conditions Min Typ Max Unit 2.44 2.49 2.54 V - 2.6 10 mV - 0.2 1 : IR = 1mA - 1.8 6 mV 400PA d IR d 10mA - 3 12 mV TA = +25qC, IR = 1mA Reverse Breakdown Change with Current 'VR/'IR TA = +25qC 400PA d IR d 10mA Reverse Dynamic Impedance ZD TA = +25qC IR = 1mA Temperature Stability Reverse Breakdown Change with Current STT 'VR/'IR Reverse Dynamic Impedance ZD IR = 1mA - 0.4 1.4 : Long Term Stability In Reference Voltage ST IR = 1mA - 20 - ppm/Khr Rev. 01 HT336AR-25 HT336AT-25 Typical Performance Characteristics FIGURE 1. Reverse Voltage Change FIGURE 2. Reverse Characteristics FIGURE 3. Temperature (qC) FIGURE 4. Forward Characteristics Rev. 01 HT336AR-25 HT336AT-25 Physical Dimensions Rev. 01 HT336AR-25 HT336AT-25 Physical Dimensions SOP8 C SEATING PLANE .228-.244 TYP [5.80-6.19] A .004 [0.1] C PIN 1 ID AREA 6X .050 [1.27] 8 1 2X .150 [3.81] .189-.197 [4.81-5.00] NOTE 3 4X (0 -15 ) 4 5 B 8X .012-.020 [0.31-0.51] .010 [0.25] C A B .150-.157 [3.81-3.98] NOTE 4 .069 MAX [1.75] .005-.010 TYP [0.13-0.25] 4X (0 -15 ) SEE DETAIL A .010 [0.25] .004-.010 [0.11-0.25] 0 -8 .016-.050 [0.41-1.27] DETAIL A (.041) [1.04] TYPICAL Rev. 01