LT1997HDF-1#PBF

LT1997-1 Precision, High Voltage, Gain Selectable Difference/Current Sense Amplifier FEATURES DESCRIPTION Precision Gain: Up to 80V/V nn Input Common Mode Voltage Range: V– to V– + 76V nn 109dB Minimum CMRR (Gain = 10) nn 0.012% (120ppm) Maximum Gain Error (Gain = 10) nn 1ppm/°C Maximum Gain Error Drift nn 2ppm Maximum Gain Nonlinearity nn Wide Supply Voltage Range: 3.3V to 50V nn Rail-to-Rail Output nn 350µA Supply Current nn 65µV Maximum Op Amp Offset Voltage nn 650kHz –3dB Bandwidth (Gain = 10) nn Low Power Shutdown: 20µA nn Space-Saving MSOP and DFN Packages The LT®1997-1 is a difference amplifier that can be used to amplify small differential signals while rejecting large common mode signals making it an ideal choice for current sense applications. It combines a precision operational amplifier with highly-matched resistors to form a one-chip solution to amplify and level shift voltages accurately using no external components. It comes with three standard pin-selectable gain options (10, 20 and 50), which can be further combined to form gains from 0.141 to 80 with accuracy of 0.012% (120ppm). The LT1997-1 also operates with input voltages between V– and V– + 76V (independent of V+), enabling robust operation in demanding industrial environments. Its excellent resistor matching results in a common mode rejection ratio of greater than 109dB (Gain = 10). APPLICATIONS The resistors maintain their excellent matching over temperature; the matching temperature coefficient is guaranteed less than 1ppm/°C. The resistors are extremely linear with voltage, resulting in a gain nonlinearity of less than 2ppm. nn High Side or Low Side Current Sensing Bidirectional Wide Common Mode Range Current Sensing nn High Voltage to Low Voltage Level Translation nn Industrial Data-Acquisition Front-Ends nn Replacement for Isolation Circuits nn Differential to Single-Ended Conversion nn nn The LT1997-1 is fully specified at 5V and ±15V supplies and from –40°C to 125°C. The device is available in space saving 16-lead MSOP and 4mm × 4mm DFN14 packages. All registered trademarks and trademarks are the property of their respective owners. TYPICAL APPLICATION Precision Wide Voltage Range, Bidirectional Current Monitor Typical Distribution of CMRR (G = 10) 15V VSOURCE = –15V TO 61V 250 V+ LT1997-1 –INA –INB –INC 3k RSENSE 1Ω RC 1Ω 150k 15k – 15k + OUT 7.5k VOUT = ±10mV/mA 300k REF2 300k REF1 3k LOAD +INA +INB +INC 19971 TA01a VS = ±15V VCM = –15V TO +14.575V 150 100 50 0 SHDN V– –15V NUMBER OF UNITS 200 7.5k 661 UNITS FROM 2 RUNS MS16(12) –5 –4 –3 –2 –1 0 1 2 CMRR (µV/V = ppm) 3 4 5 19971 TA01b Rev 0 Document Feedback For more information www.analog.com 1 LT1997-1 TABLE OF CONTENTS Features............................................................................................................................. 1 Applications........................................................................................................................ 1 Typical Application ................................................................................................................ 1 Description......................................................................................................................... 1 Absolute Maximum Ratings...................................................................................................... 3 Pin Configuration.................................................................................................................. 3 Order Information.................................................................................................................. 3 Electrical Characteristics......................................................................................................... 4 Typical Performance Characteristics........................................................................................... 9 Pin Functions......................................................................................................................14 Block Diagram.....................................................................................................................15 Applications Information........................................................................................................16 Package Description.............................................................................................................28 Typical Application...............................................................................................................30 Related Parts......................................................................................................................30 Rev 0 2 For more information www.analog.com LT1997-1 ABSOLUTE MAXIMUM RATINGS (Note 1) Supply Voltages (V+ to V–).........................................60V +INA, –INA, +INB, –INB, +INC, –INC (Note 2)...................(V– + 80V) to (V– –0.3V) REF, REF1, REF2..................... (V– + 60V) to (V– – 0.3V) SHDN...................................... (V+ + 0.3V) to (V– – 0.3V) Output Current (Continuous) (Note 6).....................50mA Output Short-Circuit Duration (Note 3)...........................................Thermally Limited Temperature Range (Notes 4, 5) LT1997I-1..................................................–40 to 85°C LT1997H-1.............................................. –40 to 125°C Maximum Junction Temperature........................... 150°C Storage Temperature Range.......................–65 to 150°C MSOP Lead Temperature (Soldering, 10 sec)......... 300°C PIN CONFIGURATION TOP VIEW +INA 14 –INA 1 16 –INA 12 –INB +INB 3 14 –INB 11 NC +INC REF1 REF2 V– +INB 3 NC 4 +INC 5 SHDN 6 10 –INC 9 V+ REF 7 8 15 V– TOP VIEW +INA 1 5 6 7 8 –INC V+ SHDN OUT 12 11 10 9 MS PACKAGE VARIATION: MS16 (12) 16-LEAD PLASTIC MSOP OUT DF PACKAGE 14(12)-LEAD (4mm × 4mm) PLASTIC DFN TJMAX = 150°C, θJA = 130°C/W TJMAX = 150°C, θJA = 45°C/W , θJC = 3°C/W EXPOSED PAD (PIN 15) IS V–, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LT1997IDF-1#PBF LT1997IDF-1#TRPBF 19971 14-Lead (4mm × 4mm) Plastic DFN –40°C to 85°C LT1997HDF-1#PBF LT1997HDF-1#TRPBF 19971 14-Lead (4mm × 4mm) Plastic DFN –40°C to 125°C LT1997IMS-1#PBF LT1997IMS-1#TRPBF 19971 16-Lead Plastic MSOP –40°C to 85°C LT1997HMS-1#PBF LT1997HMS-1#TRPBF 19971 16-Lead Plastic MSOP –40°C to 125°C *The temperature grade is identified by a label on the shipping container. Consult ADI Marketing for parts specified with wider operating temperature ranges. Parts ending with PBF are RoHS and WEEE compliant. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix. Rev 0 For more information www.analog.com 3 LT1997-1 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, –40°C < TA < 85°C for I-grade parts, –40°C < TA < 125°C for H-grade parts, otherwise specifications are at TA = 25°C. Difference Amplifier Configuration, V+ = 15V, V– = –15V, VCM = VOUT = VREF = VREF1 = VREF2 = 0V. VCMOP is the common mode voltage of the internal op amp. SYMBOL PARAMETER CONDITIONS ∆G VOUT = ±10V G = 10 Gain Error MS16 Package MIN TYP MAX ±0.005 ±0.012 ±0.014 ±0.022 ±0.028 ±0.038 ±0.04 % % % % % % ±0.017 ±0.019 ±0.025 ±0.03 ±0.051 ±0.053 ±1 ±2 ±3 ±65 ±200 ±1.5 5 15 3 10 % % % % % % ppm/°C ppm ppm µV µV µV/°C nA nA nA nA l ±0.01 G = 20 l ±0.015 G = 50 l ∆G Gain Error DF14 Package VOUT = ±10V G = 10 ±0.005 l ±0.01 G = 20 l ±0.015 G = 50 l ∆G/∆T GNL Gain Drift vs Temperature (Note 6) Gain Nonlinearity VOUT = ±10V VOUT = ±10V VOS Op Amp Offset Voltage (Note 9) V– < VCMOP < V+ – 1.75V ±0.2 ±1 l l ±20 l ∆VOS/∆T IB Op Amp Offset Voltage Drift (Note 6) Op Amp Input Bias Current V– < VCMOP < V+ – 1.75V V– + 0.25V < VCMOP < V+ – 1.75V l l –5 –15 –3 –10 l l l 69.3 66.1 64.2 82.5 78.75 76.5 95.7 91.4 88.8 kΩ kΩ kΩ l l l 25.2 12.6 5 109 107 84 82 109 107 116 114 107 100 81 78 107 102 111 107 30 15 6 126 34.8 17.4 7 kΩ kΩ kΩ dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB l IOS RIN CMRR Op Amp Input Offset Current Input Impedance (Note 8) Common Mode Rejection Ratio MS16 Package V– + 0.25V < VCMOP < V+ – 1.75V Common Mode G = 10 G = 20 G = 50 Differential G = 10 G = 20 G = 50 G = 10, VCM = –15V to +14.575V l G = 10, VCM = –15V to +61V, +INC = –INC = 0V l G = 20, VCM = –15V to +13.9125V l G = 50, VCM = –15V to +13.515V l CMRR Common Mode Rejection Ratio DF14 Package ±0.5 ±2 UNITS G = 10, VCM = –15V to +14.575V l G = 10, VCM =  –15V to +61V, +INC = –INC = 0V l G = 20, VCM = –15V to +13.9125V l G = 50, VCM = –15V to +13.515V l ±0.5 98 128 130 123 96 124 125 Rev 0 4 For more information www.analog.com LT1997-1 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, –40°C < TA < 85°C for I-grade parts, –40°C < TA < 125°C for H-grade parts, otherwise specifications are at TA = 25°C. Difference Amplifier Configuration, V+ = 15V, V– = –15V, VCM = VOUT = VREF = VREF1 = VREF2 = 0V. VCMOP is the common mode voltage of the internal op amp. SYMBOL PARAMETER CONDITIONS VCM Input Voltage Range (Note 7) ∆R/R Reference Divider Matching Error ∆R R –R = REF1 REF2 R ⎛ RREF1 + RREF2 ⎞ ⎜⎝ ⎟⎠ 2 +INA/–INA +INA/–INA (+INC/–INC Connected to Ground) +INB/–INB +INC/–INC Available in MS16 Package Only Power Supply Rejection Ratio (Note 9) VS = ±1.65V to ±25V, VCM = VOUT = Mid-Supply eni Input Referred Noise Voltage Density f = 1kHz G = 10 G = 20 G = 50 f = 0.1Hz to 10Hz G = 10 G = 20 G = 50 No Load ISINK = 5mA No Load ISOURCE = 5mA 50Ω to V+ 50Ω to V– ∆VOUT = ±5V VOL ISC Output Voltage Swing Low (Referred to V–) Output Voltage Swing High (Referred to V+) Short-Circuit Output Current SR Slew Rate BW Small Signal –3dB Bandwidth tS Settling Time VOH VS TYP –15 –15 –15 –15 ±0.002 l PSRR Input Referred Noise Voltage MIN l l l l l 114 l l l l l l l 10 10 1.7 G = 10 G = 20 G = 50 G = 10 0.1%, ∆VOUT = 10V 0.01%, ∆VOUT = 10V G = 20 0.1%, ∆VOUT = 10V 0.01%, ∆VOUT = 10V G = 50 0.1%, ∆VOUT = 10V 0.01%, ∆VOUT = 10V Supply Voltage l tON Turn-On Time VIL SHDN Input Logic Low (Referred to V+) l VIH SHDN Input Logic High (Referred to V+) l ISHDN SHDN Pin Current l IS Supply Current MAX 14.575 61 13.9125 13.515 ±0.006 ±0.008 dB 31 26 22 nV/√Hz nV/√Hz nV/√Hz 0.9 0.8 0.7 30 280 30 400 32 34 4 µVP-P µVP-P µVP-P mV mV mV mV mA mA V/µs 150 500 150 900 650 500 300 kHz kHz kHz 6.3 21.3 µs µs 7.5 15.4 µs µs 8.6 23 µs µs V V µs 3 3.3 50 50 –2.5 V –10 –15 µA 350 400 600 25 70 µA µA µA µA –1.2 V l 20 l V V V V % % 124 16 Active, VSHDN ≥ V+ – 1.2V Active, VSHDN ≥ V+ – 1.2V Shutdown, VSHDN ≤ V+ – 2.5V Shutdown, VSHDN ≤ V+ – 2.5V UNITS Rev 0 For more information www.analog.com 5 LT1997-1 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, –40°C < TA < 85°C for I-grade parts, –40°C < TA < 125°C for H-grade parts, otherwise specifications are at TA = 25°C. Difference Amplifier Configuration, V+ = 5V, V– = 0V, VCM = VOUT = VREF = VREF1 = VREF2 = Mid-Supply. VCMOP is the common mode voltage of the internal op amp. SYMBOL PARAMETER CONDITIONS ∆G VOUT = 1V to 4V G = 10 Gain Error MS16 Package MIN TYP MAX ±0.005 ±0.012 ±0.014 ±0.022 ±0.028 ±0.035 ±0.037 % % % % % % ±0.017 ±0.019 ±0.024 ±0.028 ±0.048 ±0.05 ±1 % % % % % % ppm/°C l ±0.01 G = 20 l ±0.015 G = 50 l ∆G Gain Error DF14 Package VOUT = 1V to 4V G = 10 ±0.005 l ±0.01 G = 20 l ±0.015 G = 50 l ∆G/∆T Gain Drift vs Temperature (Note 6) VOUT = 1V to 4V GNL Gain Nonlinearity VOUT = 1V to 4V Op Amp Offset Voltage (Note 9) V–