TS3431 1.24V Programmable Shunt Voltage Reference ■ ■ ■ ■ ■ Adjustable output voltage: 1.24 to 24V Several precision @ 25°C ±2%, ±1%, ±0.5% and ±0.25% Sink current capability: 0.4 to 100mA Industrial temperature range: -40 to +125°C Performances compatible with industry standard TL431 L SOT23-3L (Plastic Micropackage) Description The TS3431 is a programmable shunt voltage reference with guaranteed temperature stability over the entire temperature range of operation (-40 to +125°C). The output voltage may be set to any value between 1.24V and 24V with an external resistor bridge. Z TO-92 (Plastic Package) Pin Connections (top view) Available in SOT23-3 surface mount package, it can be designed in applications where space saving is a critical issue. TO-92 (top view) Applications ■ ■ ■ ■ ■ Computers Instrumentation Battery chargers Switch mode power supply Battery operated equipments SOT23-3 (top view) 1 TS3431 Reference Cathode 3 Anode 2 Order Codes Part Number Temperature Range TS3431ILT/AILT/BILT/CILT TS3431IZ/AIZ/BIZ/CIZ TS3431IZT/AIZT/BIZT/CIZT TS3431IZ-AP/AIZ-AP/BIZ-AP/CIZ-AP December 2004 Package Packaging Marking SOT23-3L Tape & Reel L280-L281 L282-L283 TO-92 Bulk Tape & Reel Ammo pack -40, +125°C Revision 2 1/11 TS3431 Absolute Maximum Ratings 1 Absolute Maximum Ratings Table 1. Key parameters and their absolute maximum ratings Symbol VKA IK IREF Parameter Cathode to Anode Voltage Reverse Breakdown Current Reference Current 1 PD Power Dissipation Tstd Storage Temperature ESD Tlead SOT23-3 TO92 Human Body Model (HBM) Machine Model (MM) Lead Temperature (soldering, 10 seconds) 1) Pd has been calculated with Tamb = 25°C and Tj = 150°C and Value Unit 25 V -100 to +150 mA -0.05 to10 mA 360 625 mW -65 to +150 °C 2 200 250 kV V °C Rthjc = 66°C/W, Rthja = 200°C/W for the TO92 package Rthjc = 110°C/W, Rthja = 340°C/W for the SOT23-3L package Table 2. Operating Conditions Symbol Parameter IK Cathode Operating Current VK Cathode Operating Voltage Toper 2/11 Operating Free Air Temperature Range Value Unit 0.5 to 100 mA 1.24 to 24 V -40 to +125 °C Electrical Characteristics TS3431 2 Electrical Characteristics Table 3. Tamb = 25°C (unless otherwise specified) Symbol Parameter Reference input voltage IK = 10mA VK ∆VK TC IKMIN ∆Vref ---------------∆Vka IREF ∆IREF EN Min. TS3431 (2%) 1.215 TS3431A (1%) 1.228 TS3431B (0.5%) 1.234 TS3431C (0.25%) 1.237 Typ. Max. 1.24 1.252 1.246 V 1.243 18 -40°C < T < +125°C 21 Temperature coefficient -40°C < T < +125°C 100 Minimum Operating Current T = 25°C 10 0.35 -40°C < T < +125°C Ratio of change in reference input volt- IK=10mA age to change in cathode to anode volt- VK= 24 to 1.24V age -40°C < T < +125°C Unit 1.265 Variation of reference input voltage over 0°C < T < +70°C temperature -40°C < T < +105°C 0.4 0.5 1.2 1.5 mV ppm/°C mA mV/V 2 Reference input current IK=10mA, R1=10KΩ, R2=+ ∞ T=25°C Reference input current deviation IK=10mA, R1=10KΩ, R2=+ 0°C < T < +70°C 0.5 1 -40°C < T < +125°C 0.9 1.5 Off-state cathode current VK=24V T=25°C 35 500 IOFF RKA Test Condition 0.9 -40°C < T < +125°C 1.5 2 -40°C < T < +105°C 1000 -40°C < T < +125°C 2000 Reverse Static Impedance IK = 1 to 100mA 0.2 Wideband Noise IK = 10mA 1kHz < f < 100kHz 100 0.4 µA µA nA Ω nV/√Hz Note: Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation and by design. 3/11 TS3431 Electrical Characteristics Figure 1. Reference voltage vs. temperature Figure 4. Test circuit for VK = Vref Voltage Reference (V) 1.250 Input Output 1.245 Ik IK = 10mA VK = VREF 1.240 Vka 1.235 Vref 1.230 -40 0 40 80 120 Temperature (°C) Figure 2. Cathode voltage vs cathode current IKMIN (mA) T=-40°C Minimum operating current Cathode voltage VK (V) 1.5 1.0 0.5 0.0 0.0 T=+25°C 0.1 Figure 5. Minimum operating current vs temperature T=+125°C 0.2 0.3 0.5 0.4 0.3 VK = VREF 0.2 0.1 0.0 -40 0.4 0 40 Cathode current IK (mA) Figure 3. Reference input current vs temperature 120 Figure 6. Dynamic impedance vs frequency 1.00 0.5 Dynamic impedance ZKA (Ω ) Reference current IREF (µA) 80 Temperature (°C) 0.75 0.50 0.25 VK = VREF T=+25°C 0.4 0.3 0.2 0.1 0.00 -40 0 40 Temperature (°C) 4/11 80 120 0.0 10 100 1000 Frequency (Hz) 10000 Electrical Characteristics TS3431 Figure 7. Off-State current vs temperature Figure 10. Test circuit for off-state current measurement OFF State Current IOFF (nA) 300 Vka=24V 200 Ioff 100 0 -40 0 40 80 120 Temperature (°C) Figure 8. Ratio of change in reference input voltage to change in Vka voltage vs temperature Figure 11. Test circuit for VK > V REF 2.0 ∆VREF / ∆VK (mV/V) Input Vka Ik 1.5 R1 Iref 1.0 ∆VK = 1.24 to 24V 0.5 0.0 -40 R2 IK = 10 mA 0 40 80 120 Vka = Vref . (1+R1/R2) + Iref . R1 Temperature (°C) Figure 9. Phase and gain vs frequency Vref Figure 12. Test circuit for phase and gain measurement 80 20 0 1000 10000 100000 Output 10 µF T = +25°C Intput Gain (dB) 0 40 IK=10mA 6.8 K Ω 40 4.3 K Ω Phase (°) 10 µF 1000000 Frequency (Hz) 5/11 TS3431 Electrical Characteristics Figure 13. Pulse response at Ik=1mA Figure 16. Test circuit for pulse response at Ik = 1mA 5.0 T=+25°C Input Voltage 2.7KΩ IK=1mA Output voltage 0 ... 0.0 0 2 4 6 Output 4V 2.5 Intput Voltage (V) ... 8 Time (µs) Figure 14. Pulse response at Ik = 10mA Figure 17. Test circuit for pulse response at Ik = 10mA 5.0 Input Voltage T=+25°C 270Ω IK=10mA 2.5 Output voltage Output 4V Intput Voltage (V) ... 0 ... 0.0 0 2 4 6 8 Time (µs) Figure 15. Block diagram Figure 18. Equivalent input noise vs frequency 300 Reference + - Noise (nV / √ Hz) Cathode VK = VREF IK = 10 mA T = +25°C 200 100 VREF 0 0.1 Anode 6/11 1 10 100 Frequency (kHz) 1000 10000 Package Mechanical Data TS3431 3 Package Mechanical Data 3.1 3 Pins - Plastic Package TO-92 (tape & reel) A1 P T P A H W2 W0 W W1 H0 I1 H L1 H1 d D0 F1 F2 P2 P0 Millimeters Inches Dim. Min. AL A T d I1 P PO P2 F1/F2 ∆h ∆P W W0 W1 W2 H H0 H1 DO L1 Typ. Max. Min. Typ. 5.0 5.0 4.0 0.197 0.197 0.157 0.45 2.5 11.7 12.4 5.95 2.4 -1 -1 17.5 5.7 8.5 12.7 12.7 6.35 2.5 0 0 18.0 6 9 15.5 16 3.8 4.0 Max. 0.018 13.7 13 6.75 2.8 1 1 19.0 6.3 9.75 0.5 20 16.5 25 4.2 11 0.098 0.461 0.488 0.234 0.094 -0.039 -0.039 0.689 0.224 0.335 0.500 0.500 0.250 0.098 0 0 0.709 0.236 0.354 0.610 0.630 0.150 0.157 0.539 0.512 0.266 0.110 0.039 0.039 0.748 0.248 0.384 0.020 0.787 0.650 0.984 0.165 0.433 7/11 TS3431 Package Mechanical Data 3.2 3 Pins - Plastic Package TO-92 (tape ammo pack) A1 P T P A H W2 W0 W W1 H0 I1 H L1 H1 d D0 F1 F2 P2 P0 Millimeters Inches Dim. Min. AL A T d I1 P PO P2 F1/F2 ∆h ∆P W W0 W1 W2 H H0 H1 DO L1 8/11 Typ. Max. Min. Typ. 5.0 5.0 4.0 0.197 0.197 0.157 0.45 2.5 11.7 12.4 5.95 2.4 -1 -1 17.5 5.7 8.5 12.7 12.7 6.35 2.5 0 0 18.0 6 9 15.5 16 3.8 4.0 Max. 0.018 13.7 13 6.75 2.8 1 1 19.0 6.3 9.75 0.5 20 16.5 25 4.2 11 0.098 0.461 0.488 0.234 0.094 -0.039 -0.039 0.689 0.224 0.335 0.500 0.500 0.250 0.098 0 0 0.709 0.236 0.354 0.610 0.630 0.150 0.157 0.539 0.512 0.266 0.110 0.039 0.039 0.748 0.248 0.384 0.020 0.787 0.650 0.984 0.165 0.433 Package Mechanical Data TS3431 3.3 3 Pins - Plastic Package TO-92 (bulk) TO-92 MECHANICA DATA mm. mils DIM. MIN. TYP MAX. MIN. TYP. MAX. A 4.32 4.95 170.1 194.9 b 0.36 0.51 14.2 20.1 D 4.45 4.95 175.2 194.9 E 3.30 3.94 129.9 155.1 e 2.41 2.67 94.9 105.1 e1 1.14 1.40 44.9 55.1 L 12.7 15.49 500.0 609.8 R 2.16 2.41 85.0 94.9 S1 0.92 1.52 36.2 59.8 W 0.41 0.56 16.1 22.0 0102782/C 9/11 TS3431 Package Mechanical Data 3.4 SOT23-3L Package SOT23-3L MECHANICAL DATA mm. mils DIM. MIN. TYP MAX. MIN. TYP. MAX. A 0.890 1.120 35.05 44.12 A1 0.010 0.100 0.39 3.94 A2 0.880 1.020 34.65 b 0.300 0.500 11.81 19.69 C 0.080 0.200 3.15 7.88 D 2.800 3.040 110.26 E 2.100 2.64 82.70 E1 1.200 1.400 47.26 0.950 2.900 1.300 37.41 114.17 51.19 e 0.950 37.41 1.900 74.82 0.400 0.600 L1 119.72 103.96 e1 L 40.17 15.75 55.13 23.63 0.540 21.27 k 8° 8° D GAUGE PLANE e L E E1 L1 0.25 b c C e1 0.10 SEATING PLANE A A2 C A1 7110469/A 10/11 Revision History TS3431 4 Revision History Date Revision 01 Jan. 2004 1 Description of Changes First Release Specific content changes as follows: 01 Dec. 2004 2 • • • CI version added in Table: Order Codes on page 1 Rthjc information added in Table1: Key parameters and their absolute maximum ratings on page 2 Test condition added in Table3: Tamb = 25°C (unless otherwise specified) on page 3 Information furnished is believed to be accurate and reliable. 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