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| 1 TC9491A TC9491B LOW POWER, BANDGAP VOLTAGE REFERENCES FEATURES s s s s s s s Temperature Coefficient ......................... 50ppm/C Wide Operating Current Range ....... 15A to 20mA Dynamic Impedance ......................................... 0.6 Output Tolerance ...................................... 1% or 2% Output Voltage Option .................................. 1.220V TO-92 Plastic Package 8-Pin Plastic Small Outline (SO) Package 2 3 4 5 6 GENERAL DESCRIPTION The TC9491 (1.220V output) bipolar, two-terminal, bandgap voltage references offer precision performance without premium price. These devices do not require thinfilm resistors, greatly lowering manufacturing complexity and cost. A 50ppm/C output temperature coefficient and a 15A to 20mA operating current range make these devices attractive for multimeter, data acquisition converter, and telecommunication voltage references. APPLICATIONS s s s s s ADC and DAC Reference Current Source Generation Threshold Detectors Power Supplies Multi-meters ORDERING INFORMATION Part No. TC9491ACOA TC9491BCOA TC9491ACZM TC9491BCZM Package Range 8-Pin SOIC 8-Pin SOIC TO-92 TO-92 Temperature 0C to +70C 0C to +70C 0C to +70C 0C to +70C Tempco. 50 ppmC 100 ppmC 50 ppmC 100 ppmC PIN CONFIGURATIONS TO-92 PLASTIC (BOTTOM VIEW) 3 1 NC NC NC SURFACE MOUNT PLASTIC PACKAGE 1 2 3 8 7 6 5 CATHODE NC NC NC ANODE 4 TC9491ACZB TC94191BCZB TC9491ACOA TC94191BOA NC = NO INTERNAL CONNECTION 7 8 TC9491A/B-3 8/23/96 TELCOM SEMICONDUCTOR, INC. 3-15 LOW POWER, BANDGAP VOLTAGE REFERENCES TC9491A TC9491B ABSOLUTE MAXIMUM RATINGS* Forward Current .................................................... +10mA Reverse Current .................................................... +30mA Storage Temperature Range ................ - 65C to +150C Operating Temperature Range TO-92 Package ..................................... 0C to +70C COA Surface Mount Package ............... 0C to +70C Lead Temperature (Soldering, 10 sec) TO-92 Package .............................................. +300C COA Surface Mount Package ........................ +300C Power Dissipation Limited by Forward/Reverse Current *Functional operation above the absolute maximum stress ratings is not implied. RESPONSE TIME TEST CIRCUIT 36 k OUTPUT INPUT TC9491 ELECTRICAL CHARACTERISTICS: TA = +25C, unless otherwise specified. Symbol V(BR)R IRMIN Parameter Reverse Breakdown Voltage TA = 0C to +70C Minimum Operating Current TA = +25C TA = 0C to +70C Reverse Breakdown Voltage Change with Current IRmin = IR = 1.0mA, TA = +25C TA = 0C to +70C 1.0mA = IR = 20mA, TA = +25C TA = 0C to +70C Reverse Dynamic Impedance Average Temperature Coefficient Long Term Stability Test Conditions IR 20mA Min 1.200 1.180 -- -- TC9491A Typ Max 1.22 -- 8.0 -- 1.250 1.290 15 20 Min 1.200 1.219 -- -- TC9491B Typ Max 1.220 -- 8.0 -- 1.250 1.260 15 20 Unit V A V(BR)R Z V(BR)/T S IR = 100A 10A = IR = 20mA IR = 100A, TA = +25C 0.1C -- -- -- -- -- -- -- -- -- -- -- 0.6 -- 20 1.0 1.5 10 20 -- 50 -- -- -- -- -- -- -- -- -- -- -- -- 0.6 -- 20 1.0 1.5 20 25 -- 100 -- mV ppm/C ppm/kHR 3-16 TELCOM SEMICONDUCTOR, INC. LOW POWER, BANDGAP VOLTAGE REFERENCES TC9491A TC9491B TYPICAL APPLICATIONS 10V Reference +15V 3 + 7 6 2 TC911 - 4 VOUT = 10V 1 Battery Powered 1.25V Reference +9V 2 TC9491 +15V 81 k 2 - 7 6 3 TC911 + 4 1 F 50 k 360 k 1.25V 1.22V TC9491 180 k TC9491 30 k 0.1 F R SET 3 4 5 I OUT = 1.22V R SET TYPICAL CHARACTERISTICS Output Voltage vs. Reverse Current 1000 OUTPUT VOLTAGE CHANGE (mV) REVERSE CURRENT (A) Output Voltage Change vs. Reverse Current 10 TA = +25C 8 TA = +25C 100 6 10 4 1 2 0 0.01 0.1 0 0.25 0.5 0.75 1.0 1.25 OUTPUT VOLTAGE (V) 1.5 0.1 1 10 REVERSE CURRENT (mA) 100 6 7 Forward Voltage vs. Forward Current 1.2 Response Time 10.0 TA = +25C 5.0 INPUT VOLTAGE (V) TA = +25C FORWARD VOLTAGE (V) 1.0 0.8 0.6 0.4 0.2 0 0.01 0 1.5 1.0 0.5 0 0 200 400 TIME (sec) 600 OUTPUT 0.1 1 10 FORWARD CURRENT (mA) 100 8 3-17 TELCOM SEMICONDUCTOR, INC. |
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