LT1782 Micropower, Over-The-Top SOT-23, Rail-to-Rail Input and Output Op Amp U FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ DESCRIPTIO Operates with Inputs Above V + Rail-to-Rail Input and Output Micropower: 55µA Supply Current Max Operating Temperature Range: – 40°C to 125°C Low Profile (1mm) ThinSOTTM Package Low Input Offset Voltage: 800µV Max Single Supply Input Range: 0V to 18V High Output Current: 18mA Min Specified on 3V, 5V and ±5V Supplies Output Shutdown on 6-Lead Version Reverse Battery Protection to 18V High Voltage Gain: 1500V/mV Gain Bandwidth Product: 200kHz Slew Rate: 0.07V/µs U APPLICATIO S ■ ■ ■ ■ ■ ■ The input range of the LT1782 includes ground, and a unique feature of this device is its Over-The-TopTM operation capability with either or both of its inputs above the positive rail. The inputs handle 18V both differential and common mode, independent of supply voltage. The input stage incorporates phase reversal protection to prevent false outputs from occurring even when the inputs are 9V below the negative supply. The LT1782 can drive loads up to 18mA and still maintain rail-to-rail capability. A shutdown feature on the 6-lead version can disable the part, making the output high impedance and reducing quiescent current to 5µA. The LT1782 op amp is available in the 5- and 6-lead SOT-23 packages. For applications requiring higher speed, refer to the LT1783. Portable Instrumentation Battery- or Solar-Powered Systems Sensor Conditioning Supply Current Sensing Battery Monitoring MUX Amplifiers 4mA to 20mA Transmitters , LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT and Over-The-Top are trademarks of Linear Technology Corporation. U ■ The LT®1782 is a 200kHz op amp available in the small SOT-23 package that operates on all single and split supplies with a total voltage of 2.5V to 18V. The amplifier draws less than 55µA of quiescent current and has reverse battery protection, drawing negligible current for reverse supply voltages up to 18V. TYPICAL APPLICATIO Distribution of Input Offset Voltage 25 5V TO 18V 200Ω 5V 0.2Ω 200Ω LOAD ILOAD + LT1782 MMBT3904 – VOUT = 2Ω(ILOAD) 0V TO 4.3V PERCENTAGE OF AMPLIFIERS Positive Supply Rail Current Sense V+ 20 VS = 5V, 0V VCM = 2.5V 15 10 5 2k 1782 TA01 0 –900 –600 –300 0 300 600 INPUT OFFSET VOLTAGE (µV) 900 1782 TA01a 1 LT1782 W W W AXI U U ABSOLUTE RATI GS (Note 1) Total Supply Voltage (V + to V –) .............................. 18V Input Differential Voltage ........................................ 18V Input Pin Voltage to V – ............................... + 24V/–10V Shutdown Pin Voltage Above V – ............................ 18V Shutdown Pin Current ....................................... ±10mA Output Short-Circuit Duration (Note 2) ........... Indefinite Operating Temperature Range (Note 3) LT1782C ............................................ – 40°C to 85°C LT1782I ............................................. – 40°C to 85°C LT1782H ......................................... – 40°C to 125°C Specified Temperature Range (Note 4) LT1782C ............................................ – 40°C to 85°C LT1782I ............................................. – 40°C to 85°C LT1782H ......................................... – 40°C to 125°C Junction Temperature........................................... 150°C Storage Temperature Range ................ – 65°C to 150°C Lead Temperature (Soldering, 10 sec)................. 300°C U U W PACKAGE/ORDER I FOR ATIO ORDER PART NUMBER ORDER PART NUMBER TOP VIEW TOP VIEW 5 V+ OUT 1 V– 2 + – +IN 3 4 –IN S5 PACKAGE 5-LEAD PLASTIC SOT-23 LT1782CS5 LT1782IS5 LT1782HS5 S5 PART MARKING LTLD LTLE LTXK TJMAX = 150°C, θJA = 250°C/ W V– 2 +IN 3 LT1782CS6 LT1782IS6 LT1782HS6 + 6 V OUT 1 + – 5 SHDN 4 –IN S6 PACKAGE 6-LEAD PLASTIC SOT-23 TJMAX = 150°C, θJA = 230°C/ W S6 PART MARKING LTIS LTIT LTXL Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the specified temperature range, otherwise specifications are TA = 25°C. VS = 3V, 0V; VS = 5V, 0V, VCM = VOUT = half supply, for the 6-lead part VPIN5 = 0V, pulse power tested unless otherwise specified. SYMBOL PARAMETER CONDITIONS VOS TA = 25°C 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C Input Offset Voltage ∆VOS/∆T Input Offset Voltage Drift (Note 7) IOS Input Offset Current VCM = 18V (Note 5) IB Input Bias Current VCM = 18 (Note 5) SHDN or VS = 0V, VCM = 0V to 18V LT1782C/LT1782I MIN TYP MAX UNITS µV µV µV 400 800 950 1100 ● 2 5 µV/°C ● ● 0.7 2 1 nA µA ● ● 8 6 0.1 15 12 nA µA nA ● ● ● Input Bias Current Drift –40°C ≤ TA ≤ 85°C 0.01 nA/°C Input Noise Voltage 0.1Hz to 10Hz 1 µVP-P en Input Noise Voltage Density f = 1kHz 50 nV/√Hz in Input Noise Current Density f = 1kHz 0.05 pA/√Hz 2 LT1782 ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the specified temperature range, otherwise specifications are TA = 25°C. VS = 3V, 0V; VS = 5V, 0V, VCM = VOUT = half supply, for the 6-lead part VPIN5 = 0V, pulse power tested unless otherwise specified. SYMBOL PARAMETER CONDITIONS RIN Input Resistance Differential Common Mode, VCM = 0V to (VCC – 1V) Common Mode, VCM = 0V to 18V CIN Input Capacitance Input Voltage Range LT1782C/LT1782I MIN TYP MAX ● 3.4 ● 1.5 ● 0 UNITS 6.5 5 3 MΩ GΩ MΩ 5 pF 18 V CMRR Common Mode Rejection Ratio (Note 5) VCM = 0V to VCC – 1V VCM = 0V to 18V (Note 8) ● ● 90 68 100 80 dB dB PSRR Power Supply Rejection Ratio VS = 3V to 12.5V, VCM = VO = 1V ● 90 100 dB AVOL Large-Signal Voltage Gain VS = 3V, VO = 500mV to 2.5V, RL = 10k VS = 3V, 0°C ≤ TA ≤ 70°C VS = 3V, –40°C ≤ TA ≤ 85°C 200 133 100 1500 ● ● V/mV V/mV V/mV VS = 5V, VO = 500mV to 4.5V, RL = 10k VS = 5V, 0°C ≤ TA ≤ 70°C VS = 5V, –40°C ≤ TA ≤ 85°C 400 250 200 1500 ● ● V/mV V/mV V/mV VOL Output Voltage Swing LOW No Load ISINK = 5mA VS = 5V, ISINK = 10mA ● ● ● VOH Output Voltage Swing HIGH VS = 3V, No Load VS = 3V, ISOURCE = 5mA ● ● 2.91 2.6 2.94 2.8 V V VS = 5V, No Load VS = 5V, ISOURCE = 10mA ● ● 4.91 4.5 4.94 4.74 V V VS = 3V, Short to GND VS = 3V, Short to VCC 5 15 10 30 mA mA VS = 5V, Short to GND VS = 5V, Short to VCC 15 20 30 40 mA mA ISC Short-Circuit Current (Note 2) Minimum Supply Voltage ISHDN 8 500 800 mV mV mV ● 2.7 V IS = –100µA ● 18 V 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C ● ● Supply Current, SHDN VPIN5 = 2V, No Load (Note 10) Shutdown Pin Current Reverse Supply Voltage IS 3 200 400 40 55 60 65 µA µA µA ● 5 15 µA VPIN5 = 0.3V, No load (Note 10) VPIN5 = 2V, No Load (Note 10) VPIN5 = 5V, No Load (Note 10) ● ● ● 0.5 2 5 8 nA µA µA Shutdown Output Leakage Current VPIN5 = 2V, No Load (Note 10) ● 0.05 1 µA 10 30 µA 0.3 V Supply Current (Note 6) Maximum Shutdown Pin Current VPIN5 = 18V, No Load (Note 10) ● VL Shutdown Pin Input Low Voltage (Note 10) ● VH Shutdown Pin Input High Voltage (Note 10) ● tON Turn-On Time VPIN5 = 5V to 0V, RL = 10k (Note 10) 100 µs tOFF Turn-Off Time VPIN5 = 0V to 5V, RL = 10k (Note 10) 6 µs GBW Gain Bandwidth Product (Note 5) f = 5kHz 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C 200 kHz kHz kHz ● ● 2 110 100 90 V 3 LT1782 ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the specified temperature range, otherwise specifications are TA = 25°C. VS = 3V, 0V; VS = 5V, 0V, VCM = VOUT = half supply, for the 6-lead part VPIN5 = 0V, pulse power tested unless otherwise specified. SYMBOL PARAMETER CONDITIONS LT1782C/LT1782I MIN TYP MAX SR Slew Rate (Note 5) AV = –1, RL = ∞ 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C 0.035 0.031 0.028 tS Settling Time VS = 5V, ∆VOUT = 2V to 0.1%, AV = –1 THD Distortion VS = 3V, VO = 2VP–P, AV = 1, RL = 10k, f =1kHz FPBW Full-Power Bandwidth (Note 9) VOUT = 2VP–P ● ● 0.07 UNITS V/µs V/µs V/µs 45 µs 0.003 % 11 kHz The ● denotes specifications which apply over the specified temperature range, otherwise specifications are TA = 25°C. VS = ±5V, VCM = 0V,VOUT = 0V, for the 6-lead part VPIN5 = V –, pulse power tested unless otherwise specified. SYMBOL PARAMETER CONDITIONS VOS TA = 25°C 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C Input Offset Voltage LT1782C/LT1782I MIN TYP MAX 500 900 1050 1200 ● ● UNITS µV µV µV ∆VOS/∆T Input Offset Voltage Drift (Note 7) ● 2 5 µV/°C IOS Input Offset Current ● 0.7 2 nA IB Input Bias Current ● 8 15 Input Bias Current Drift ● 0.01 nA/°C 1 µVP-P Input Noise Voltage 0.1Hz to 10Hz nA en Input Noise Voltage Density f = 1kHz 50 nV/√Hz in Input Noise Current Density f = 1kHz 0.05 pA/√Hz RIN Input Resistance Differential Common Mode, VCM = –5V to 13V 6.5 3 MΩ MΩ CIN Input Capacitance 5 pF Input Voltage Range ● ● 3.4 1.5 ● –5 13 V CMRR Common Mode Rejection Ratio VCM = –5V to 13V ● 68 80 dB AVOL Large-Signal Voltage Gain VO = ±4V, RL= 10k 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C 150 ● ● 55 40 30 V/mV V/mV V/mV VOL Output Voltage Swing LOW No Load ISINK = 5mA ISINK = 10mA ● ● ● VOH Output Voltage Swing HIGH No Load ISOURCE = 5mA ISOURCE = 10mA ● ● ● 4.91 4.6 4.5 4.94 4.8 4.74 ISC Short-Circuit Current (Note 2) Short to GND 0°C ≤ TA ≤ 70°C 18 15 30 ● mA mA VS = ±1.5V to ±9V ● 90 100 dB 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C ● ● Supply Current, SHDN VPIN5 = –3V, VS = ±5V, No Load (Note 10) Shutdown Pin Current VPIN5 = –4.7V, VS = ±5V, No load (Note 10) VPIN5 = –3V, VS = ±5V, No Load (Note 10) PSRR Power Supply Rejection Ratio IS Supply Current ISHDN 4 – 4.997 – 4.8 – 4.6 – 4.992 – 4.5 – 4.2 V V V V V V 45 60 65 70 µA µA µA ● 6 20 µA ● ● 0.5 2 8 nA µA LT1782 ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the specified temperature range, otherwise specifications are TA = 25°C. VS = ±5V, VCM = 0V,VOUT = 0V, for the 6-lead part VPIN5 = V –, pulse power tested unless otherwise specified. SYMBOL PARAMETER Maximum Shutdown Pin Current LT1782C/LT1782I MIN TYP MAX CONDITIONS VPIN5 = 9V, VS = ±9V (Note 10) ● 10 0.05 UNITS 30 µA 1 µA – 4.7 V Shutdown Output Leakage Current VPIN5 = –7V, VS = ±9V, No Load (Note 10) ● VL Shutdown Pin Input Low Voltage VS = ±5V (Note 10) ● VH Shutdown Pin Input High Voltage VS = ±5V (Note 10) ● tON Turn-On Time VPIN5 = 0V to –5V, RL = 10k (Note 10) ● 100 µs tOFF Turn-Off Time VPIN5 = –5V to 0V, RL = 10k (Note 10) ● 6 µs GBW Gain Bandwidth Product f = 5kHz 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C 120 110 100 225 ● ● kHz kHz kHz AV = –1, RL = ∞, VO = ±4V, Measured at VO = ±2V 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C 0.0375 0.033 0.030 0.075 ● ● V/µs V/µs V/µs SR Slew Rate –3 V tS Settling Time ∆VOUT = 4V to 0.1%, AV = 1 50 µs FPBW Full-Power Bandwidth (Note 9) VOUT = 8VP–P 3 kHz The ● denotes specifications which apply over the full operating temperature range of – 40°C ≤ TA ≤ 125°C. VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply, for the 6-lead part VPIN5 = 0V, pulse power tested unless otherwise specified. (Note 4) SYMBOL PARAMETER UNITS ● 800 3 µV mV ∆VOS/∆T Input Offset Voltage Drift ● 15 µV/°C IOS VCM = 18V (Note 5) ● ● 3 2 nA µA VCM = 18V (Note 5) ● ● 30 25 nA µA 18 V IB MIN LT1782H TYP MAX VOS CONDITIONS Input Offset Voltage 400 Input Offset Current Input Bias Current Input Voltage Range CMRR Common Mode Rejection Ratio VCM = 0.3V to VCC – 1V VCM = 0.3V to 18V AVOL Large-Signal Voltage Gain VS = 3V, VO = 500mV to 2.5V, RL = 10k ● 0.3 ● ● 76 60 200 50 1500 ● V/mV V/mV 400 80 1500 ● V/mV V/mV VS = 5V, VO = 500mV to 4.5V, RL = 10k dB dB VOL Output Voltage Swing LOW No Load ISINK = 5mA VS = 5V, ISINK = 10mA ● ● ● VOH Output Voltage Swing HIGH VS = 3V, No Load VS = 3V, ISOURCE = 5mA ● ● 2.85 2.20 V V VS = 5V, No Load VS = 5V, ISOURCE = 10mA ● ● 4.85 3.80 V V VS = 3V to 12.5V, VCM = VO = 1V ● 80 dB ● 2.7 V ● 18 V PSRR Power Supply Rejection Ratio Minimum Supply Voltage Reverse Supply Voltage IS = – 100µA 15 900 1500 mV mV mV 5 LT1782 ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature range of – 40°C ≤ TA ≤ 125°C. VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply, for the 6-lead part VPIN5 = 0V, pulse power tested unless otherwise specified. (Note 4) SYMBOL PARAMETER IS ISHDN CONDITIONS MIN LT1782H TYP MAX UNITS ● 55 100 µA µA 25 µA 12 nA µA 3 µA Supply Current 40 Supply Current, SHDN VPIN5 = 2V, No Load (Note 10) ● Shutdown Pin Current VPIN5 = 0.3V, No load (Note 10) VPIN5 = 2V, No Load (Note 10) ● ● Output Leakage Current VPIN5 = 2V, No Load (Note 10) ● 0.5 Maximum Shutdown Pin Current VPIN5 = 18V, No Load ● 45 µA VL Shutdown Pin Input Low Voltage (Note 10) ● 0.3 V VH Shutdown Pin Input High Voltage (Note 10) ● 2 GBW Gain Bandwidth Product f = 10kHz (Note 5) 110 65 200 ● kHz kHz 0.035 0.020 0.07 ● V/µs V/µs SR Slew Rate AV = –1, RL = ∞ (Note 7) V The ● denotes specifications which apply over the full operating temperature range of – 40°C ≤ TA ≤ 125°C. VS = ±5V, VCM = 0V, VOUT = 0V, for the 6-lead part VPIN5 = V–, pulse power tested unless otherwise specified. (Note 4) SYMBOL PARAMETER UNITS ● 900 3.2 µV mV ∆VOS/∆T Input Offset Voltage Drift (Note 9) ● 15 µV/°C IOS Input Offset Current ● 3 nA IB Input Bias Current ● 30 nA CMRR Common Mode Rejection Ratio VCM = –4.7V to 13V AVOL Large-Signal Voltage Gain VS = ±4V, RL = 10k VO PSRR Input Offset Voltage 500 ISHDN ● 60 dB ● 55 20 ±4.85 ±4.10 ±3.50 V V V 150 V/mV V/mV Output Voltage Swing No Load ISINK = ±5mA ISINK = ±10mA ● ● ● Power Supply Rejection Ratio VS = ±1.5V to ±9V ● 80 dB ● ±1.35 V Minimum Supply Voltage IS MIN LT1782H TYP MAX VOS CONDITIONS ● 60 110 µA µA 25 µA 12 nA µA 45 µA Supply Current 45 Supply Current, SHDN VPIN5 = – 3V, VS = ±5V, No Load (Note 10) ● Shutdown Pin Current VPIN5 = – 4.7V, VS = ±5V, No load (Note 10) VPIN5 = – 3V, VS = ±5V, No Load (Note 10) ● ● Maximum Shutdown Pin Current VPIN5 = 9V, VS = ±9V, No Load (Note 10) ● 0.5 Output Leakage Current VPIN5 = –7V, VS = ±9V, No Load ● 3 µA VL Shutdown Pin Input Low Voltage VS = ±5V ● – 4.7 V VH Shutdown Pin Input High Voltage VS = ±5V ● –3 GBW Gain Bandwidth Product f = 5kHz 120 70 225 ● kHz kHz 0.0375 0.0220 0.075 ● V/µs V/µs SR 6 Slew Rate AV = –1, RL = ∞, VO = ±4V Measured at VO = ±2V V LT1782 ELECTRICAL CHARACTERISTICS 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 LT1782C and LT1782I are guaranteed functional over the operating temperature range of – 40°C to 85°C. The LT1782H is guaranteed functional over the operating temperature range of – 40°C to 125°C. Note 4: The LT1782C is guaranteed to meet specified performance from 0°C to 70°C. The LT1782C is designed, characterized and expected to meet specified performance from – 40°C to 85°C but is not tested or QA sampled at these temperatures. The LT1782I is guaranteed to meet specified performance from – 40°C to 85°C. The LT1782H is guaranteed to meet specified performance from – 40°C to 125°C. Note 5: VS = 5V limits are guaranteed by correlation to VS = 3V and VS = ±5V or VS = ±9V tests. Note 6: VS = 3V limits are guaranteed by correlation to VS = 5V and VS = ±5V or VS = ±9V tests. Note 7: Guaranteed by correlation to slew rate at VS = ±5V, and GBW at VS = 3V and VS = ±5V tests. Note 8: This specification implies a typical input offset voltage of 1.8mV at VCM = 18V and a maximum input offset voltage of 7.2mV at VCM = 18V. Note 9: This parameter is not 100% tested. Note 10: Specifications apply to 6-lead SOT-23 with shutdown. Note 11: Full-power bandwidth is calculated for the slew rate. FPBW = SR/2πVP. U W TYPICAL PERFOR A CE CHARACTERISTICS 400 TA = 125°C 45 40 TA = 25°C 35 TA = –55°C 30 25 5 VS = 5V, 0V 300 4 200 100 VOUT (V) INPUT OFFSET VOLTAGE CHANGE (µV) 50 SUPPLY CURRENT (µA) Output Voltage vs Large Input Voltage Minimum Supply Voltage Supply Current vs Supply Voltage 0 TA = 125°C TA = –55°C –100 2 4 6 8 10 12 14 SUPPLY VOLTAGE (V) 16 18 1782 G01 5V 2 VIN TA = 25°C –200 1 + – –300 –400 20 3 0 1 2 3 4 TOTAL SUPPLY VOLTAGE (V) 5 1782 G02 0 –10–8 –6 –4 –2 0 2 4 6 8 10 12 14 16 18 VIN (V) 1782 G02a 7 LT1782 U W TYPICAL PERFOR A CE CHARACTERISTICS Input Bias Current vs Common Mode Voltage 1 1 OUTPUT SATURATION VOLTAGE (V) VS = 5V, 0V 5000 TA = 125°C 4000 3000 2000 TA = 25°C 1000 40 30 TA = –55°C 20 10 VS = ±2.5V VOD = 30mV OUTPUT SATURATION VOLTAGE (V) 6000 INPUT BIAS CURRENT (nA) Output Saturation Voltage vs Load Current (Output Low) Output Saturation Voltage vs Load Current (Output High) TA = 125°C 0.1 TA = 25°C TA = –55°C VS = ±2.5V VOD = 30mV TA = 125°C 0.1 TA = –55°C TA = 25°C 0.01 0 0.01 1µ –10 15 16 18 3.8 4 4.2 4.4 4.6 4.8 5 5.2 5.4 COMMON MODE VOLTAGE (V) 0.001 10µ 100µ 1m SOURCING LOAD CURRENT (A) Output Saturation Voltage vs Input Overdrive OUTPUT SATURATION VOLTAGE (mV) 0.1Hz to 10Hz Noise Voltage 40 VS = ±5V OUTPUT HIGH VS = ±2.5V 10 OUTPUT LOW 1 10 SINKING CURRENT 30 SOURCING CURRENT 25 20 VS = ±2.5V NO LOAD 0 20 30 40 50 INPUT OVERDRIVE (mV) 15 –50 60 –25 0 25 50 75 TEMPERATURE (°C) 1782 G06 100 125 0 80 30 10 100 1k FREQUENCY (Hz) 10k 1782 G08 7 8 9 70 VS = ±2.5V 0.35 50 0.30 80 60 PHASE 40 0.25 0.20 40 30 20 GAIN 20 0 10 –20 0 –40 –10 –60 0.05 –20 –80 0 –30 0.15 0.10 1 10 100 1k FREQUENCY (Hz) 10k 1782 G09 10 100 VS = ±2.5V 60 GAIN (dB) INPUT NOISE CURRENT DENSITY (pA/√Hz) 40 4 5 6 TIME (sec) 1k 10k 100k FREQUENCY (Hz) PHASE SHIFT (DEG) 50 3 Gain and Phase Shift vs Frequency 0.40 60 2 1782 G07 Input Noise Current vs Frequency 70 1 1782 G06a Noise Voltage Density vs Frequency 8 NOISE VOLTAGE (400nV/DIV) OUTPUT CURRENT (mA) 35 1 10m 1782 G05 Output Short-Circuit Current vs Temperature 100 20 10µ 1µ 1m SINKING LOAD CURRENT (A) 1µ 1782 G04 1782 G03 INPUT NOISE VOLTAGE DENSITY (nV/√Hz) 10m –100 1M 1782 G10 LT1782 U W TYPICAL PERFOR A CE CHARACTERISTICS Gain Bandwidth Product vs Temperature 60 0.11 f = 5kHz VS = ±2.5V VS = ±2.5V 0.10 200 190 180 GAIN BAINDWIDTH PRODUCT (kHz) 210 0.09 0.08 FALLING 0.07 0.06 0.05 –25 0 25 50 75 TEMPERATURE (°C) 100 0.04 –50 125 –25 0 25 50 75 TEMPERATURE (°C) 100 1782 G11 60 50 POWER SUPPLY REJECTION RATIO (dB) GAIN BANDWIDTH PRODUCT (kHz) 200 GAIN BANDWIDTH PRODUCT 150 100 10k LOAD RESISTANCE (Ω) 60 50 POSITIVE SUPPLY 40 30 20 10 NEGATIVE SUPPLY 0 VS = ±2.5V 100 90 80 70 60 50 40 1M 1k Settling Time to 0.1% vs Output Step 4 VS = ±2.5V VPIN5 (SHUTDOWN) = 2.5V 3 100k AV = 1 AV = –1 2 OUTPUT STEP (V) OUTPUT IMPEDANCE (Ω) AV = 1 100k 1782 G16 1M AV = 10 10k FREQUENCY (Hz) 1782 G15 Disabled Output Impedance vs Frequency (Note 8) AV = 100 18 30 10k 100k FREQUENCY (Hz) 1k VS = ±2.5V 10 4 6 8 10 12 14 16 TOTAL SUPPLY VOLTAGE (V) CMRR vs Frequency 70 100k 10k 100 2 0 1782 G13 VS = ±2.5V 80 Output Impedance vs Frequency OUTPUT IMPEDANCE (Ω) 160 125 110 1782 G14 1k AV = –1 RF = RG = 10k f = 5kHz 180 –10 50 1k GAIN BANDWIDTH PRODUCT 200 90 PHASE MARGIN (DEG) 250 220 PSRR vs Frequency 70 VS = ±2.5V AV = –1 RF = RG = 10k f = 5kHz 50 1782 G12 Gain Bandwidth Product and Phase Margin vs Load Resistance PHASE MARGIN 240 COMMON MODE REJECTION RATIO (dB) 170 –50 55 PHASE MARGIN RISING SLEW RATE (V/µs) 220 PHASE MARGIN (DEG) 230 GAIN BANDWIDTH (kHz) Gain Bandwidth Product and Phase Margin vs Supply Voltage Slew Rate vs Temperature 10k 1k 1 VS = ±5V 0 –1 –2 1 AV = 1 AV = –1 –3 0.1 100 1k 10k 100k FREQUENCY (Hz) 1M 1782 G17 100 100 1k 10k 100k FREQUENCY (Hz) 1M 1782 G17a –4 25 30 35 40 50 60 SETTLING TIME (µs) 70 80 1782 G18 9 LT1782 U W TYPICAL PERFOR A CE CHARACTERISTICS Capacitive Load Handling Overshoot vs Capacitive Load OUTPUT SWING (VP-P) 25 20 AV = 1 15 AV = 5 10 VS = ±5V 10 30 AV = 10 5 DISTORTION ≤ 1% AV = 1 8 THD + NOISE (%) VS = 5V, 0V VCM = 2.5V 35 6 4 VS = ±1.5V VS = 3V, 0V VOUT = 2VP-P VCM = 1.2V RL = 10k 0.1 AV = –1 RF = RG = 100k 0.010 2 AV = 1 10 100 1000 CAPACITIVE LOAD (pF) 0.001 0 100 0 10000 1k 10k FREQUENCY (Hz) 100k 10 10 f = 1kHz, RL = 10k VS = 3V TOTAL AV = 1 VIN = 2VP-P AT 1kHz THD + NOISE (%) VS = 3V, 0V VIN = 0.5V TO 2.5V 0.01 AV = –1, RF = RG = 100k VS = ±1.5V VCM = 0V 0.1 0.01 VS = 3V, 0V VIN = 0.2V TO 2.2V 0.001 100 AV = 1 VS = ±1.5V VCM = 0V 1 0.1 AV = 1 VS = 3V. 0V VCM = 1.5V 0.001 1k 10k LOAD RESISTANCE TO GROUND (Ω) 100k 0 AV = –1, RF = RG = 100k VS = 3V, 0V VCM = 1.5V 1 2 OUTPUT VOLTAGE AMPLITUDE (VP-P) 1782 G22 Supply Current vs Shutdown Voltage 10k 1782 G21 Total Harmonic Distortion + Noise vs Output Voltage Amplitude Total Harmonic Distortion + Noise vs Load Resistance VS = ±1.5V VIN = ±1V 1k 100 FREQUENCY (Hz) 1782 G20 1782 G19 1 10 Open-Loop Gain INPUT OFFSET VOLTAGE CHANGE (50µV/DIV) OVERSHOOT (%) 1 12 40 THD + NOISE (%) Total Harmonic Distortion + Noise vs Frequency Undistorted Output Swing vs Frequency 3 VS = ±5V RL = 10k RL = 50k RL = 2k –6 –5 –4 –3 –2 –1 0 1 2 3 OUTPUT VOLTAGE (V) 1782 G23 4 5 6 1782 G24 Small-Signal Response Large-Signal Response 50 VS = 5V, 0V TA = 125°C SUPPLY CURRENT (µA) 40 TA = 25°C 30 TA = –55°C 20 10 0 0 0.5 1 1.5 2 SHUTDOWN PIN VOLTAGE (V) 2.5 1782 G25 10 VS = ±5V AV = 1 CL = 15pF 1782 G26 VS = ±5V AV = 1 CL = 15pF 1782 G27 LT1782 U W U U APPLICATIO S I FOR ATIO Supply Voltage The positive supply pin of the LT1782 should be bypassed with a small capacitor (typically 0.1µF) within an inch of the pin. When driving heavy loads, an additional 4.7µF electrolytic capacitor should be used. When using split supplies, the same is true for the negative supply pin. The LT1782 is protected against reverse battery voltages up to 18V. In the event a reverse battery condition occurs, the supply current is typically less than 1nA. Inputs The LT1782 has two input stages, NPN and PNP (see the Simplified Schematic), resulting in three distinct operating 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 –8nA. When the input common mode voltage is within 0.5V of the positive rail, the NPN stage is operating and the input bias current is typically 15nA. Increases in temperature will cause the voltage at which operation switches from the PNP input stage to the NPN input stage to move towards V +. The input offset voltage of the NPN stage is untrimmed and is typically 1.8mV. A Schottky diode in the collector of the input NPN transistors, along with special geometries for these NPN transistors, allows the LT1782 to operate with either or both of its inputs above V +. At about 0.3V above V +, the NPN input transistor is fully saturated and the input bias current is typically 4µA at room temperature. The input offset voltage is typically 1.8mV when operating above V +. The LT1782 will operate with its inputs 18V above V – regardless of V +. The inputs are protected against excursions as much as 10V below V – by an internal 6k resistor in series with each input and a diode from the input to the negative supply. The input stage of the LT1782 incorporates phase reversal protection to prevent the output from phase reversing for inputs up to 9V below V –. There are no clamping diodes between the inputs and the maximum differential input voltage is 18V. Output The output of the LT1782 can swing to within 60mV of the positive rail with no load and within 3mV of the negative rail with no load. When monitoring voltages within 60mV of the positive rail or within 3mV of the negative rail, gain should be taken to keep the output from clipping. The LT1782 can sink and source over 30mA at ±5V supplies, sourcing current is reduced to 10mA at 3V total supplies as noted in the Electrical Characteristics. The LT1782 is internally compensated to drive at least 600pF of capacitance under any output loading conditions. A 0.22µF capacitor in series with a 150Ω resistor between the output and ground will compensate these amplifiers for larger capacitive loads, up to 10,000pF, at all output currents. Distortion There are two main contributors to distortion in op amps: output crossover distortion as the output transitions from sourcing to sinking current, and distortion caused by nonlinear common mode rejection. If the op amp is operating inverting, there is no common mode induced distortion. If the op amp is operating in the PNP input stage (input is not within 0.8V of V +), the CMRR is very good, 11 LT1782 U W U U APPLICATIO S I FOR ATIO typically 100dB. When the LT1782 switches between input stages, there is significant nonlinearity in the CMRR. Lower load resistance increases the output crossover distortion but has no effect on the input stage transition distortion. For lowest distortion, the LT1782 should be operated single supply, with the output always sourcing current and with the input voltage swing between ground and (V + – 0.8V). See the Typical Performance Characteristics curves, “Total Harmonic Distortion + Noise vs Ouput Voltage Amplitude.” Gain The open-loop gain is almost independent of load when the output is sourcing current. This optimizes perfor- mance in single supply applications where the load is returned to ground. The typical performance curve of open-loop gain for various loads shows the details. Shutdown The 6-lead part includes a shutdown feature that disables the part, reducing quiescent current and making the output high impedance. The part can be shut down by bringing the SHDN pin 1.2V or more above V –. When shut down, the supply current is about 5µA and the output leakage current is less than 1µA (V – ≤ VOUT ≤ V +). In normal operation, the SHDN pin can be tied to V – or left floating. See the Typical Performance Characteristics curves, “Supply Current vs Shutdown Pin Voltage.” W W SI PLIFIED SCHE ATIC V+ Q2 Q1 Q3 SHDN R1 30k R2 6k Q4 Q19 – IN Q17 + J1 Q7 R3 6k 2µA Q8 Q11 OUT Q16 Q9 Q5 Q18 Q15 Q26 Q24 Q20 Q12 +IN Q25 Q23 Q22 D3 D1 Q6 D4 D5 Q10 Q13 Q14 R4 40k Q21 R5 40k V– 1782 SS 12 LT1782 U TYPICAL APPLICATIO S Protected Fault Conditions OK! –18V OK! 5V V+ LT1782 LT1782 + 24V REVERSE BATTERY OK! 5V OK! 5V + LT1782 LT1782 10V INPUT DIFFERENTIAL VOLTAGE + 18V INPUT OVERVOLTAGE INPUT BELOW GROUND 1782 TA03 Compact, High Output Current, Low Dropout, Precision 2.5V Supply VS 2.8V to 3.3V SUPPLY CURRENT ≅ 120µA, NO LOAD 22Ω 5% 1k 5% + 680Ω 5% LT1782 – 100k 5% VISHAY SILICONIX Si3445DV 0.1µF LT1790-2.5 1µF 1782 TA04 VOUT 2.5V ILOAD = 0mA TO 300mA NOTE: NOT CURRENT LIMITED 13 LT1782 U PACKAGE DESCRIPTIO S5 Package 5-Lead Plastic SOT-23 (LTC DWG # 05-08-1633) (LTC DWG # 05-08-1635) 2.80 – 3.10 (.110 – .118) (NOTE 3) A SOT-23 (Original) .90 – 1.45 (.035 – .057) SOT-23 (ThinSOT) 1.00 MAX (.039 MAX) A1 .00 – .15 (.00 – .006) .01 – .10 (.0004 – .004) A2 .90 – 1.30 (.035 – .051) .80 – .90 (.031 – .035) L .35 – .55 (.014 – .021) .30 – .50 REF (.012 – .019 REF) 2.60 – 3.00 (.102 – .118) 1.50 – 1.75 (.059 – .069) (NOTE 3) PIN ONE .95 (.037) REF .25 – .50 (.010 – .020) (5PLCS, NOTE 2) .20 (.008) A DATUM ‘A’ L NOTE: 1. CONTROLLING DIMENSION: MILLIMETERS MILLIMETERS 2. DIMENSIONS ARE IN (INCHES) .09 – .20 (.004 – .008) (NOTE 2) 3. DRAWING NOT TO SCALE 4. DIMENSIONS ARE INCLUSIVE OF PLATING 5. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 6. MOLD FLASH SHALL NOT EXCEED .254mm 7. PACKAGE EIAJ REFERENCE IS: SC-74A (EIAJ) FOR ORIGINAL JEDEL MO-193 FOR THIN 14 A2 1.90 (.074) REF A1 S5 SOT-23 0401 LT1782 U PACKAGE DESCRIPTIO S6 Package 6-Lead Plastic SOT-23 (LTC DWG # 05-08-1634) (LTC DWG # 05-08-1636) 2.80 – 3.10 (.110 – .118) (NOTE 3) SOT-23 (Original) SOT-23 (ThinSOT) A .90 – 1.45 (.035 – .057) 1.00 MAX (.039 MAX) A1 .00 – 0.15 (.00 – .006) .01 – .10 (.0004 – .004) A2 .90 – 1.30 (.035 – .051) .80 – .90 (.031 – .035) L .35 – .55 (.014 – .021) .30 – .50 REF (.012 – .019 REF) 2.60 – 3.00 (.102 – .118) 1.50 – 1.75 (.059 – .069) (NOTE 3) PIN ONE ID .95 (.037) REF .25 – .50 (.010 – .020) (6PLCS, NOTE 2) .20 (.008) A DATUM ‘A’ L NOTE: 1. CONTROLLING DIMENSION: MILLIMETERS MILLIMETERS 2. DIMENSIONS ARE IN (INCHES) .09 – .20 (.004 – .008) (NOTE 2) A2 1.90 (.074) REF A1 S6 SOT-23 0401 3. DRAWING NOT TO SCALE 4. DIMENSIONS ARE INCLUSIVE OF PLATING 5. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 6. MOLD FLASH SHALL NOT EXCEED .254mm 7. PACKAGE EIAJ REFERENCE IS: SC-74A (EIAJ) FOR ORIGINAL JEDEL MO-193 FOR THIN 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. 15 LT1782 U TYPICAL APPLICATIO S Current Source VCC LT1634-1.25 R1 + LT1782 2N3906 – IOUT = 1.25V R1 1782 TA02 Programmable Gain, AV = 2, AV = 20, 100kHz Amplifier Programmable Gain Amplifier Frequency Response 30 VCC 25 AV = 2 SHDN 15 VCC + IN OUT LT1784 SHDN VCC – VEE – R1 10k AV = 1+ OR 5 AV = 2 0 –10 LT1782 R2 9.09k 10 –5 + VEE AV = 20 20 GAIN (dB) AV = 20 1+ ( ( R1 + R2 R3 R1 R2 + R3 –15 ) ) –20 1k 10k 100k 1M FREQUENCY (Hz) 10M 1782 TA05b R3 1k 1782 TA05a RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1783 Micropower Over-The-Top SOT-23 Rail-to-Rail Input and Output Op Amp SOT-23 Package, Micropower 210µA per Amplifier, Rail-to-Rail Input and Output , 1.25MHz GBW LT1490/LT1491 Dual/Quad Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps Single Supply Input Range: –0.4V to 44V, Micropower 50µA per Amplifier, Rail-to-Rail Input and Output , 200kHz GBW LT1636 Single Over-The-Top Micropower Rail-to-Rail Input and Output Op Amp 55µA Supply Current, VCM Extends 44V Above VEE, Independent of VCC, MSOP Package, Shutdown Function LT1638/LT1639 Dual/Quad, 1.2MHz, 0.4V/µs, Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps 170µA Supply Current, Single Supply Input Range: –0.4V to 44V, Rail-to-Rail Input and Output 16 Linear Technology Corporation 1782fa LT/TP 0501 1.5K REV A • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 1999