1 TC9491A TC9491B LOW POWER, BANDGAP VOLTAGE REFERENCES FEATURES ■ ■ ■ ■ ■ ■ ■ GENERAL DESCRIPTION Temperature Coefficient ......................... 50ppm/°C Wide Operating Current Range ....... 15µA to 20mA Dynamic Impedance ......................................... 0.6Ω Output Tolerance ...................................... 1% or 2% Output Voltage Option .................................. 1.220V TO-92 Plastic Package 8-Pin Plastic Small Outline (SO) Package APPLICATIONS ■ ■ ■ ■ ■ ADC and DAC Reference Current Source Generation Threshold Detectors Power Supplies Multi-meters Part No. Package Range Temperature Tempco. TC9491ACOA TC9491BCOA TC9491ACZM TC9491BCZM 8-Pin SOIC 8-Pin SOIC TO-92 TO-92 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C 50 ppm°C 100 ppm°C 50 ppm°C 100 ppm°C NC 1 8 CATHODE NC 2 7 NC NC 3 6 NC ANODE 4 5 NC 3 4 5 SURFACE MOUNT PLASTIC PACKAGE TO-92 PLASTIC (BOTTOM VIEW) 1 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 15µA to 20mA operating current range make these devices attractive for multimeter, data acquisition converter, and telecommunication voltage references. ORDERING INFORMATION PIN CONFIGURATIONS 3 2 6 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* RESPONSE TIME TEST CIRCUIT Forward Current .................................................... +10mA Reverse Current .................................................... +30mA Storage Temperature Range ................ – 65°C to +150°C Operating Temperature Range TO-92 Package ..................................... 0°C to +70°C COA Surface Mount Package ............... 0°C to +70°C Lead Temperature (Soldering, 10 sec) TO-92 Package .............................................. +300°C COA Surface Mount Package ........................ +300°C Power Dissipation Limited by Forward/Reverse Current 36 kΩ OUTPUT INPUT TC9491 *Functional operation above the absolute maximum stress ratings is not implied. ELECTRICAL CHARACTERISTICS: TA = +25°C, unless otherwise specified. Symbol Parameter Test Conditions V(BR)R Reverse Breakdown Voltage TA = 0°C to +70°C Minimum Operating Current TA = +25°C TA = 0°C to +70°C Reverse Breakdown Voltage Change with Current IRmin = IR = 1.0mA, TA = +25°C TA = 0°C to +70°C 1.0mA = IR = 20mA, TA = +25°C TA = 0°C to +70°C Reverse Dynamic Impedance Average Temperature Coefficient Long Term Stability IR ≤ 20mA IRMIN ∆V(BR)R Z ∆V(BR)/∆T S 3-16 Min TC9491A Typ Max Min TC9491B Typ Max 1.200 1.180 1.22 — 1.250 1.290 1.200 1.219 1.220 — 1.250 1.260 — — 8.0 — 15 20 — — 8.0 — 15 20 — — — — — — — — — — — 0.6 — 20 1.0 1.5 10 20 — 50 — — — — — — — — — — — — 0.6 — 20 1.0 1.5 20 25 — 100 — Unit V µA IR = 100µA 10µA = IR = 20mA IR = 100µA, TA = +25°C ±0.1°C mV Ω ppm/°C ppm/kHR TELCOM SEMICONDUCTOR, INC. LOW POWER, BANDGAP VOLTAGE REFERENCES 1 TC9491A TC9491B TYPICAL APPLICATIONS 10V Reference 3 + 7 6 2 TC911 – 4 1.22V TC9491 TC9491 +9V +15V 50 k Ω 2 Battery Powered 1.25V Reference +15V 360 kΩ VOUT = 10V 81 kΩ 1.25V – 7 6 3 TC911 + 4 180 kΩ TC9491 30 kΩ 2 1 µF 3 R SET 0.1 µF I OUT = 1.22V R SET TYPICAL CHARACTERISTICS 10 OUTPUT VOLTAGE CHANGE (mV) REVERSE CURRENT (µA) 1000 TA = +25°C 100 10 1 0.1 0 0.25 0.5 0.75 1.0 1.25 OUTPUT VOLTAGE (V) TA = +25°C 8 5 6 4 2 0 0.01 1.5 0.1 1 10 REVERSE CURRENT (mA) Forward Voltage vs. Forward Current 1.2 100 6 Response Time 10.0 TA = +25°C TA = +25°C 1.0 5.0 INPUT 0.8 VOLTAGE (V) FORWARD VOLTAGE (V) 4 Output Voltage Change vs. Reverse Current Output Voltage vs. Reverse Current 0.6 0.4 0.2 0 0.01 7 0 1.5 OUTPUT 1.0 0.5 0.1 1 10 FORWARD CURRENT (mA) TELCOM SEMICONDUCTOR, INC. 100 8 0 0 200 400 TIME (µsec) 600 3-17