LT1716 SOT-23, 44V, Over-The-Top, Micropower, Precision Rail-to-Rail Comparator U FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ DESCRIPTIO Operates from 2.7V to 44V Over-The-Top®: Input Common Mode Range Extends 44V Above V –, Independent of V + Micropower: 35µA IQ Offset Voltage: 1.5mV Max 5-Pin SOT-23 Package Valid Output with Either Input 5V Below V – Rail-to-Rail Output Swing Output Can Drive Loads Above V + Internal Pull-Up Current – 40°C to 125°C Operating Temperature Range U APPLICATIO S ■ ■ ■ ■ Power Supply Monitors Relay/Lamp Driver Oscillators Peak Detector Level Shifting The output stage includes a class “B” pull-up current source, eliminating the need for an external resistive pullup and saving power. Output voltage swings to within 35mV of the negative supply and 55mV of the positive supply, which makes the comparator a good choice for low voltage single supply operation. The output stage is also designed to drive loads connected to a higher supply than the LT1716 supply, the same as an open collector output stage. The LT1716 is available in a SOT-23 5-lead package. , LTC and LT are registered trademarks of Linear Technology Corporation. Over-The-Top is a registered trademark of Linear Technology Corporation. U ■ The LT®1716 comparator operates on any total power supply voltage between 2.7V and 44V drawing 35µA of quiescent current. The LT1716 has a unique input stage that can be taken 44V above V –, independent of V + supply. (Built-in resistors protect the inputs for faults below the negative supply of up to 5V.) The inputs can withstand 44V both differential and common mode. TYPICAL APPLICATIO Lamp Monitor 5V TO 44V 12µ 3V 1M 8µ 0.1µF VS = 5V, 0V 4µ 100k CMPD6001 5k 4 RS 0.15Ω 1W – 6n 5 LT1716 3 0.25A TO 2.5A RS ≥ + 1 LAMP GOOD INPUT ABOVE SUPPLY +IN = 10V 0 –3n +IN = 2V +IN = 2V –6n 2 –100µ 0.04 IL INPUT BELOW SUPPLY 3n IB– (A) LAMP ON/OFF Input Bias Current vs Input Bias Voltage 1716 TA01 –0.5m –1m –1.5m –10 –5 0 5 10 VIN– (V) 15 20 45 1716 TA02 1716f 1 LT1716 U W U PACKAGE/ORDER I FOR ATIO U W W W ABSOLUTE AXI U RATI GS (Note 1) ORDER PART NUMBER Supply Voltage (V + to V –) ........................................ 44V Differential Input Voltage ......................................... 44V Input Voltage ................................................... 44V, – 5V Output Short-Circuit Duration (Note 2) ............ Indefinite Operating Temperature Range (Note 3) LT1716C/LT1716I ............................. – 40°C to 85°C LT1716H .......................................... –40°C to 125°C Specified Temperature Range (Note 4) LT1716C/LT1716I ............................. – 40°C to 85°C LT1716H .......................................... –40°C to 125°C Maximum Junction Temperature .......................... 150°C Storage Temperature Range ................. – 65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300°C LT1716CS5 LT1716IS5 LT1716HS5 TOP VIEW 5 V+ OUT 1 V– 2 + – +IN 3 4 –IN S5 PART MARKING* S5 PACKAGE 5-LEAD PLASTIC SOT-23 LTYD TJMAX = 150°C, θJA = 250°C/W *The temperature grades are identified by a label on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 85°C, otherwise specifications are at TA = 25°C. Single supply operation V + = 5V, V – = 0V; VCM = V +/2 unless otherwise noted. (Note 4) LT1716C/LT1716I MIN TYP MAX SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage 0.5V < VCM < (VCC – 1V) 0°C < TA < 70°C – 40°C < TA < 85°C ● ● Input Offset Voltage Drift (Note 5) 0°C < TA < 70°C – 40°C < TA < 85°C ● ● 2 2 IOS Input Offset Current VCM = V +/2 VCM = 0V VCM = 44V ● ● ● 3 15 1.3 0.9 nA µA µA IB Input Bias Current VCM = V +/2 ● 20 35 50 75 nA nA ● ● ● 2 3 6 1 13 9 1.4 nA µA µA mA 44 V V + = 0V, VCM = 44V VCM = 0V VCM = 44V VCM = – 5V Input Voltage Range (Note 7) 300 ● 0.5 1600 2100 2500 UNITS µV µV µV µV/°C µV/°C CMRR Common Mode Rejection Ratio 0.5V ≤ VCM – 1V) 0.5V ≤ VCM < 44V, (Note 6) ● ● 89 81 110 110 dB dB PSRR Power Supply Rejection Ratio V – = 0V, VCM = 1.5V; 2.7V < V + < 36V ● 95 110 dB 200 100 500 < (V + Minimum Operating Supply Voltage 2.4 ● AVOL Large-Signal Voltage Gain RL = 1k; 1V < VOUT < 4V IS Supply Current V + = 3V, RL = Open, VO = High ● 50 65 µA µA 35 55 75 µA µA 40 60 85 µA µA ● V + = 12V, RL = Open, VO = High ● V V/mV V/mV 35 ● V + = 5V, RL = Open, VO = High 2.7 1716f 2 LT1716 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 85°C, otherwise specifications are at TA = 25°C. Single supply operation V + = 5V, V – = 0V; VCM = V +/2 unless otherwise noted. (Note 4) LT1716C/LT1716I MIN TYP MAX SYMBOL PARAMETER CONDITIONS ISC– ISC+ UNITS Output Sink Current (Note 2) VOVERDRIVE > 30mV ● 10 20 mA Output Source Current VOVERDRIVE = 5mV, VOUT = 1V ● 60 85 µA VOL Output Voltage Swing Low (Referred to V –) ISINK = 0mA, VOVERDRIVE = –10mV ISINK = 0.1mA ISINK = 1mA ISINK = 5mA ● ● ● ● 20 75 200 550 35 110 300 900 mV mV mV mV VOH Output Voltage Swing High (Referred to V +) ISOURCE = 0µA, VOVERDRIVE = 10mV ISOURCE = 10µA ● ● 30 130 55 185 mV mV Leakage Current VOUT = 40V, VOVERDRIVE > 100mV ● 0.5 2 µA Propagation Delay VOVERDRIVE > 100mV, RLOAD = 10k 3 5.5 µs The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 85°C, otherwise specifications are at TA = 25°C. Split supply operation VS = ±15V, VCM = 0V unless otherwise noted. (Note 4) LT1716C/LT1716I MIN TYP MAX SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage – 14.5V < VCM < 14V 0°C < TA < 70°C – 40°C < TA < 85°C ● ● Input Offset Voltage Drift (Note 5) 0°C < TA < 70°C – 40°C < TA < 85°C ● ● 2 2 IOS Input Offset Current VCM = 0V VCM = 29V VCM = – 15V ● ● ● 3 15 0.9 1.3 nA µA µA IB Input Bias Current VCM = 0V ● 30 50 60 100 nA nA ● ● ● 6 3 1 9 13 1.4 µA µA mA 14 V VCM = 29V VCM = – 15V VCM = – 20V Input Voltage Range (Note 7) 300 ● – 14.5 1500 2000 2400 UNITS µV µV µV µV/°C µV/°C CMRR Common Mode Rejection Ratio – 14.5V < VCM < 14V – 14.5V < VCM < 29V (Note 6) ● ● 92 81 110 98 dB dB PSRR Power Supply Rejection Ratio VS = ±1.35V to ±22V ● 90 110 dB Minimum Operating Supply Voltage AVOL Large-Signal Voltage Gain 2.4 ● RL = 6k; –14V < VOUT < 14V ● 500 400 2.7 1000 V V/mV V/mV VS = ±15V, RL = Open, VO = High ● Output Sink Current (Note 2) VOVERDRIVE > 30mV ● 10 20 mA Output Source Current VOVERDRIVE = 5mV, VOUT = –14V ● 70 105 µA Output Voltage Swing Low (Referred to V –) ISINK = 0mA, VOVERDRIVE = –10mV ISINK = 0.1mA ISINK = 1mA ISINK = 5mA ● ● ● ● IS Supply Current ISC– ISC+ VOL 40 20 75 200 550 95 35 110 300 900 µA mV mV mV mV 1716f 3 LT1716 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 85°C, otherwise specifications are at TA = 25°C. Split supply operation VS = ±15V, VCM = 0V unless otherwise noted. (Note 4) LT1716C/LT1716I MIN TYP MAX SYMBOL PARAMETER CONDITIONS UNITS VOH Output Voltage Swing High (Referred to V +) ISOURCE = 0µA, VOVERDRIVE = 10mV ISOURCE = 10µA ● ● 45 140 75 210 mV mV Leakage Current VOUT = 25V, VOVERDRIVE > 100mV ● 0.6 2 µA Propagation Delay VOVERDRIVE > 100mV, RLOAD = 10k 5.5 9 µs The ● denotes the specifications which apply over the operating temperature range of – 40°C < TA < 125°C, otherwise specifications are at TA = 25°C. Single supply operation V+ = 5V, V– = 0V, VCM = VCC/2 unless otherwise noted. (Note 4) SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage 0.5V < VCM < (VCC – 1V) MIN LT1716H TYP 300 ● Input Offset Voltage Drift (Note 5) = V+/2 IOS Input Offset Current VCM VCM = 0V VCM = 44V IB Input Bias Current VCM = V+/2 1600 2900 µV µV µV/°C 2 ● ● ● 3 220 1.3 0.9 nA µA µA 20 50 900 nA nA 25 14 1.4 nA µA µA mA 44 V 2 3 6 1 ● ● ● Input Voltage Range (Note 7) 0.5 < (V+ – 1V) UNITS ● ● V + = 0V, VCM = 44V VCM = 0V VCM = 44V VCM = – 5V MAX CMRR Common Mode Rejection Ratio 0.5V < VCM 0.5V < VCM < 44V (Note 6) ● ● 75 72 110 110 dB dB PSRR Power Supply Rejection Ratio V– = 0V, VCM = 1.5V, 2.7V < V + < 36V ● 85 110 dB Minimum Operating Supply Voltage AVOL IS Large-Signal Voltage Gain Supply Current per Amplifier 2.4 ● RL = 1k, 1V < VOUT < 4V RL = 6k ● 200 20 V + = 3V, RL = Open, VO = High 500 V/mV V/mV 50 70 µA µA 35 55 75 µA µA 40 60 85 µA µA ● V + = 12V, RL = Open, VO = High V 35 ● V + = 5V, RL = Open, VO = High 2.7 ● ISC– Output Sink Current (Note 2) VOVERDRIVE > 30mV ● 5 10 mA ISC+ Output Source Current VOVERDRIVE = 5mV, VOUT = 1V ● 60 110 µA VOL Output Voltage Swing Low (Referred to V –) ISINK = 0mA, VOVERDRIVE = –10mV ISINK = 0.1mA ISINK = 1mA ISINK = 5mA ● ● ● ● 20 75 200 550 60 170 480 1200 mV mV mV mV VOH Output Voltage Swing High (Referred to V+) ISOURCE = 0µA, VOVERDRIVE = –10mV ISOURCE = 10µA ● ● 50 130 110 220 mV mV Leakage Current VOUT = 40V, VOVERDRIVE > 100mV ● 1.7 5 µA Propagation Delay VOVERDRIVE > 100mV, RLOAD = 10k 6 9 µs 1716f 4 LT1716 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the operating temperature range of – 40°C < TA < 125°C, otherwise specifications are at TA = 25°C. Split supply operation VS = ±15V, VCM = 0V unless otherwise noted. (Note 4) SYMBOL PARAMETER CONDITIONS MIN VOS Input Offset Voltage – 14.5V < VCM < 14V LT1716H TYP 300 ● Input Offset Voltage Drift (Note 5) IOS Input Offset Current VCM = 0V VCM = 29V VCM = – 15V IB Input Bias Current VCM = 0V VCM = 29V VCM = – 15V VCM = – 20V Input Voltage Range (Note 7) MAX UNITS 1500 2900 µV µV µV/°C ● 2 ● ● ● 3 280 0.9 1.3 nA µA µA ● 30 50 60 1400 nA nA ● ● ● 6 3 1 20 30 1.4 µA µA mA ● – 14.5 CMRR Common Mode Rejection Ratio – 14.5V < VCM < 14V – 14.5V < VCM < 29V (Note 6) ● ● 85 70 110 93 dB dB PSRR Power Supply Rejection Ratio VS = ±1.35V to ±22V ● 80 110 dB 1000 ● 500 50 Minimum Operating Supply Voltage AVOL Large-Signal Voltage Gain 2.4 ● RL = 6k; –14V < VOUT < 14V RL = 6k; –13V < VOUT < 13V 14 2.7 V V V/mV V/mV IS Supply Current VS = ±15V, RL = Open, VO = High ISC– Output Sink Current (Note 2) VOVERDRIVE > 30mV ● 5 10 mA ISC+ Output Source Current VOVERDRIVE = 5mV, VOUT = –14V ● 70 155 µA VOL Output Voltage Swing Low (Referred to V –) ISINK = 0mA, VOVERDRIVE = –10mV ISINK = 0.1mA ISINK = 1mA ISINK = 5mA ● ● ● ● 20 75 200 550 70 170 480 1200 mV mV mV mV VOH Output Voltage Swing High (Referred to V +) ISOURCE = 0µA, VOVERDRIVE = 10mV ISOURCE = 10µA ● ● 45 140 120 250 mV mV Leakage Current VOUT = 25V, VOVERDRIVE > 100mV ● 1.5 5 µA Propagation Delay VOVERDRIVE > 100mV, RLOAD = 10k 5.5 10 µs Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: A heat sink may be required to keep the junction temperature below absolute maximum. Note 3: The LT1716C/LT1716I are guaranteed functional over the operating temperature range of – 40°C to 85°C. The LT1716H is guaranteed functional over the operating temperature range of – 40°C to 125°C. Note 4: The LT1716C is guaranteed to meet specified performance from 0°C to 70°C. The LT1716C is designed, characterized and expected to 40 95 µA meet performance from – 40°C to 85° but is not tested or QA sampled at the temperatures. The LT1716I is guaranteed to meet specified performance from – 40°C to 85°C. The LT1716H is guaranteed to meet specified performance from – 40°C to 125°C. Note 5: This parameter is not 100% tested. Note 6: Typical input offset voltage of 500µV at VCM = 44V above V – and a maximum input offset voltage of 4mV at VCM = 44V above V –. Note 7: If one input is within this input range, the other input can go 5V below V – and the output will be valid. 1716f 5 LT1716 U W TYPICAL PERFOR A CE CHARACTERISTICS Input Bias Current vs Common Mode Voltage 1.0000 VS = ±15V 8 V+ = 15V – INPUT BIAS CURRENT (µA) 0.1000 25°C 85°C 6 IBIAS (µA) 1 125°C –55°C 4 2 125°C 0 V = –15V VCM = 0V 0.0100 CURRENT OUT OF PIN 0.0010 0.0000 –0.0010 CURRENT OUT OF PIN 5 0 +IN –2 –3 10 15 VCM (V) 20 25 30 –0.0100 –50 –25 0 TRANSITION REGION 1716 G02 VOL AT 125°C VOL AT 85°C 1.2 VOL AT 25°C 0.8 VOL AT –55°C 0.4 V+ = 5V V – = 0V 4.9 VOH AT –55°C 4.8 VOH AT 85°C, 125°C VOH AT 25°C 4.7 4.6 8 125°C 6 85°C 4 INPUTS EXCEED SUPPLY –2 0 5 10 15 20 25 30 35 40 45 50 LOADING SOURCE CURRENT (µA) 100 90 1716 G06 Positive Supply Current vs Output Sinking Current 1000 V + = 5V V – = 0V SUPPLY CURRENT (µA) 80 –55°C < TA < 125°C –600 –800 70 OUTPUT LOW 60 50 40 OUTPUT HIGH 30 20 –1000 10 15 20 25 30 35 40 45 50 VCM (V) 1716 G05 V+ = 2.7V TO 44V V – = 0V –400 5 0 Supply Current vs Temperature –200 –55°C 25°C 0 4.5 4 6 8 10 12 14 16 18 20 LOADING SINK CURRENT (mA) Input Bias Current with Inputs Driven Below the Supply 0 V + = 5V V – = 0V 2 1716 G04 200 10 V+ = 5V V – = 0V POSITIVE SUPPLY CURRENT (µA) 2 0 5.0 Input Bias Current with Inputs Driven Above the Supply IBIAS (µA) 2.0 0 1716 G03 Output High Voltage vs Source Current OUTPUT HIGH VOLTAGE (RELATIVE TO V+) (V) Output Low Voltage vs Sink Current 1.6 –4 –0.2 –0.15 –0.1 –0.05 0 0.05 0.1 0.15 0.2 DIFFERENTIAL INPUT VOLTAGE (V) 25 50 75 100 125 150 TEMPERATURE (°C) 1716 G01 OUTPUT VOLTAGE (RELATIVE TO GND) (V) –IN –1 INPUTS EXCEED SUPPLY –2 IBIAS (µA) V + = 15V V – = –15V 0 V+ = 5V V– = 0V VCM = 2.5V IBIAS CURRENT (nA) 10 Input Bias Current vs Differential Input Voltage Input Bias Current vs Temperature TA = 25°C VS = ±15V VS = 5V 100 10 –1200 –5 –4 –3 –2 VCM (V) –1 0 1716 G07 0 –50 –25 10 0 25 50 75 100 125 150 TEMPERATURE (°C) 1716 G08 0.1 1 10 OUTPUT SINK CURRENT (mA) 100 1716 G09 1716f 6 LT1716 U W TYPICAL PERFOR A CE CHARACTERISTICS Output Leakage Current vs Output Voltage 0.6 V + = 5V V – = 0V TA = 25°C 0.5 400 350 300 OUTPUT CURRENT LIMIT (mA) 450 30 TA = 25°C REVERSE CURRENT (mA) 0.4 0.3 0.2 0.1 250 0 10 5 15 20 25 30 35 OUTPUT VOLTAGE (V) 40 45 5 0 10 15 20 REVERSE VOLTAGE (V) 1716 G10 TOTAL SWITCHING TIME (µs) OUTPUT SINKING LIMIT (mA) 100 25 20 15 10 VS = ±15V RISE 10 VS = ±2.5V FALL 5 1 –50 –25 0 10 TOTAL SUPPLY VOLTAGE (V) 100 TOTAL SWITCHING TIME (µs) TOTAL SWITCHING TIME (µs) 100 FALL RISE VS = ±15V FALL VS = ±2.5V RISE 40 1716 G15 0 25 50 75 100 125 150 TEMPERATURE (°C) 1716 G11 100 0 RL = 10k VOUT = 90% VFINAL (RISE) VOUT = 10% VFINAL (FALL) VSTEP = 100mV TA = 25°C ±15V FALL TIME 10 ±15V RISE TIME ±2.5V FALL TIME 1 25 50 75 100 125 150 TEMPERATURE (°C) ±2.5V RISE TIME 0 10 20 30 40 50 60 70 80 90 100 OVERDRIVE (mV) 1716 G14 Response Time VOUT = 90% VFINAL VSTEP = 100mV VOVERDRIVE = 10mV TA = 25°C VIN+ 30V 26V VS = ±15V RISE 10 5V VS = ±2.5V RISE RL = 100k RL = 10k VOUT RL = OPEN 0V 1 1 10 20 30 TOTAL SUPPLY VOLTAGE (V) 5 Total Switching Time vs Pull-Up Resistor RL = 10k VOUT = 90% VFINAL (RISE) VOUT = 10% VFINAL (FALL) VCM = 1/2 VTOTALSUPPLY VSTEP = 100mV VOVERDRIVE = 10mV 0 VS = ±15V 10 1716 G13 Total Switching Time vs Total Supply Voltage 10 VS = 5V 15 Total Switching Time vs Overdrive RL = 10k VOUT = 90% VFINAL (RISE) VOUT = 10% VFINAL (FALL) VSTEP = 100mV VOVERDRIVE = 10mV 1716 G12 100 20 Total Switching Time vs Temperature OUTPUT SHORTED TO V + TA = 25°C 1 25 1716 G27 Output Sinking Current vs Total Supply Voltage 30 OUTPUT SHORTED TO V + 0 –50 –25 25 TOTAL SWITCHING TIME (µs) OUTPUT LEAKAGE CURRENT (nA) 500 Output Sinking Current Limit vs Temperature Reverse Supply Current 1 100 1000 10 PULL-UP RESISTOR (kΩ) 10000 VS = 5V, 0V TIME (µs) VOD = 10mV RL = 10k, 100k, OPEN VIN+ = 26V TO 30V VIN– = 29.99V 1716 G17 1716 G16 1716f 7 LT1716 U W TYPICAL PERFOR A CE CHARACTERISTICS Response Time VIN+ Response Time 30V VIN+ 26V Response Time 25V VIN+ 25V 21V 15V 21V 15V RL = 10k, 100k VOUT VOUT RL = OPEN –15V 5V –15V VOUT 0V TIME(µs) VS = 5V, 0V VOD = 10mV RL = 10k, 100k, OPEN VIN+ = 30V TO 26V VIN– = 26.01V VS = ±15V TIME(µs) VOD = 10mV RL = 10k, 100k, OPEN VIN+ = 21V TO 25V VIN– = 24.99V 1716 G18 Response Time Response Time VIN+ 0V –100mV 15V 5V RL = 100k VOUT RL = OPEN 1716 G20 Response Time 2.6V VOUT VIN+ 5V 2.5V VIN+ 2.5V 2.4V RL = 10k VS = ±15V TIME(µs) VOD = 10mV RL = 10k, 100k, OPEN VIN+ = 25V TO 21V VIN– = 21.01V 1716 G19 RL = 10k, 100k VOUT RL = OPEN 0V –15V 0V TIME(µs) VS = 5V VOD = 10mV RL = 10k, 100k, OPEN VIN+ = 2.4V TO 2.5V VIN– = 2.49V TIME(µs) VS = 5V VOD = 10mV RL = 10k, 100k, OPEN VIN+ = 2.6V TO 2.5V VIN– = 2.51V 1716 G21 Below VS– Fault (Rising) Response Time VIN+ TIME(µs) VS = ±15V VOD = 10mV RL = 10k, 100k, OPEN VIN+ = –100mV TO 0V VIN– = –10mV 1716 G22 Below VS– Fault (Falling) –14.9V VIN+ –19V 15V 100mV 0V 15V –14.9V VIN+ –19V 15V RL = 10k, 100k VOUT VOUT 1716 G23 VOUT RL = OPEN –15V –15V VS = ±15V TIME(µs) VOD = 10mV RL = 10k, 100k, OPEN VIN+ = 110mV TO 0mV VIN– = 10mV 1716 G24 –15V TIME(µs) VS = ±15V RL = 10k, 100k, OPEN VIN+ = –19V TO –14.9V VIN– = –15V 1716 G25 TIME(µs) VS = ±15V RL = 10k, 100k, OPEN VIN+ = –14.9V TO –19V VIN– = –15V 1716 G26 1716f 8 LT1716 U W U U APPLICATIO S I FOR ATIO The LT1716 comparator features low power operation with exceptional input precision with rail-to-rail input and output swing. The comparator operates flawlessly even when the inputs are pulled over the positive rail or below the negative rail. Supply Voltage The LT1716 operates from 2.7V to 44V. The comparator can be shut down by removing V +. In this condition, the input bias current is typically less than 3nA, even if the inputs are 44V above the negative supply. The LT1716 is protected against reverse battery voltages of up to 20V. The reverse battery current is resistive as shown in the reverse supply current graph. Inputs The comparator inputs can swing from 0.5V above to 44V above V –. If one input is within this range, the other input can be forced up to 5V below V – without phase reversal occuring at the output. The LT1716 has three stages—NPN, PNP and common base (see Simplified Schematic)—resulting in three distinct operating regions and two transition regions as shown in the Input Bias Current vs Common Mode typical performance curve. For input voltages about 0.8V or more below V +, the PNP input stage is active and the input bias current is typically – 4nA. The PNP differential input stage will have bias current that flows out of the device. With a differential input voltage of even just 100mV or so, there will be zero bias current into the higher of the two inputs, while the current flowing out of the lower input will be twice the measured bias current. When the input voltage is about 0.5V or less from V +, the NPN state is operating and the input bias current is typically 10nA. Increases in temperature will cause the voltage at which operation switches from the PNP stage to the NPN stage to move towards V +. The input offset voltage of the NPN stage is untrimmed and is typically 500µV. A Schottky diode in the collector of each NPN transistor of the NPN input stage allows the LT1716 to operate with either or both of its inputs above V +. At about 0.3V above V +, the NPN transistor is fully saturated and the input bias current is typically 4µA at room temperature. The input offset voltage is typically 500µV when operating above V +. The LT1716 will operate with its input 44V above V – , regardless of V +. The transition to the negative common mode input stage occurs at 0.3V above V – . Above this trip point the PNP stage is active. When the inputs are 0.3V below V – , the common base input stage is active in addition to the PNP stage. The input bias current out of each input becomes VIN/5kΩ. The LT1716 is designed to operate when either input falls below the negative supply. Internal resistors protect the inputs for faults below the negative supply of up to 5V without phase reversal. The built-in 5k resistor limits the current at each input to 1mA at 5V below the negative supply. External matched input resistors can be added for increased voltage fault operation below the negative supply but the maximum input current should be kept under 1mA. Input Protection The inverting and noninverting input pins of the LT1716 have on-chip protection. ESD protection is provided to prevent damage during handling. The input transistors have voltage clamping and limiting resistors to protect against excursions as much as 5V below V – . There are no clamping diodes between the inputs and the maximum differential input voltage is 44V. Output The output stage of the LT1716 can drive loads connected to a supply more positive than the device, the same as comparators with open collector output stages. The output of the LT1716 can be pulled up to 44V above V – , regardless of V +. 1716f 9 10 VEE 3µA R3 60k Q11 R4 30k VCC Q21 IN + Q7 IN – R2 5k R1 5k A A Q4 Q6 B Q20 Q3 D2 Q5 B D1 D3 R5 Q1 Q2 Q12 D4 Q15 D5 R8 Q16 Q61 Q53 Q62 Q17 Q35 Q18 D6 Q39 R6 Q34 Q33 Q13 R9 Q10 R7 Q14 R10 Q25 Q22 Q8 R11 Q9 Q24 Q23 Q36 Q31 Q37 Q32 Q38 D8 Q26 Q28 Q27 1716 SS D7 Q30 Q29 OUT LT1716 W W SI PLIFIED SCHE ATIC 1716f LT1716 U PACKAGE DESCRIPTIO S5 Package 5-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1635) 0.62 MAX 0.95 REF 2.90 BSC (NOTE 4) 1.22 REF 1.4 MIN 3.85 MAX 2.62 REF 2.80 BSC 1.50 – 1.75 (NOTE 4) PIN ONE RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.30 – 0.45 TYP 5 PLCS (NOTE 3) 0.95 BSC 0.80 – 0.90 0.20 BSC 0.01 – 0.10 1.00 MAX DATUM ‘A’ 0.30 – 0.50 REF 0.09 – 0.20 (NOTE 3) NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 1.90 BSC S5 TSOT-23 0302 1716f Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 11 LT1716 U TYPICAL APPLICATIO S Overcurrent Flag 4.5V TO 44V 0.1µF LT1634-1.25 113k 1% 11.8k 1% 3V 4 10M 1% RS CMPD6263 1 LT1716 3 10.7k 1% LOAD 5 – + 2 10M 1% OVERCURRENT IMAX = 0.1 RS 1716 TA03 Charge/Discharge Indicator 0.1Ω 3V TO 44V CHARGE CURRENT + – LOAD VCHARGER 3V 681Ω 1% 4 1M 1% 681Ω 1% – 0.1µF 5 CMPD6263 1 LT1716 3 + 2 CHARGE 1M 1% 1716 TA04 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LTC1442 Dual Micropower Comparator and 1% Reference 1.182V ±1% Reference, ±10mVMAX Input Offset LTC1540 Nanopower Comparator and 1% Reference 1.182V ±1% Reference, ±10mVMAX Input Offset LT1634 Micropower Precision Shunt Reference 0.05%, 10µA, 10ppm/°C Max Drift, 1.25V, 2.5V, 4.096V, 5V, MSOP, SO-8, TO-92 Packages LTC1921 Dual –48V Telecom Supply Monitor Monitors Two Supplies and Fuses LTC1998 Micropower Li-Ion Battery Monitor 1% Trip Point Adjustable from 2.5V to 3.25V 1716f 12 Linear Technology Corporation LT/TP 0503 1K • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2002