LT1997IDF-3#PBF

LT1997-3 Precision, Wide Voltage Range Gain Selectable Amplifier DESCRIPTION FEATURES Pin Configurable as a Difference Amplifier, Inverting Amplifier or Noninverting Amplifier nn 91dB Minimum DC CMRR (Gain = 1) nn 65dB AC CMRR (at 100kHz, Gain = 1) nn 0.006% (60ppm) Maximum Gain Error (Gain = 1) nn 1ppm/°C Maximum Gain Error Drift nn 2ppm Maximum Gain Nonlinearity nn ±160V Common Mode Voltage Range nn Wide Supply Voltage Range: 3.3V to 50V nn Rail-to-Rail Output nn 350µA Supply Current nn 60µV Maximum Op Amp Offset Voltage nn 1.1MHz –3dB Bandwidth (Gain = 1) nn Low-Power Shutdown: 20µA nn Space-Saving MSOP and DFN Packages The LT®1997-3 combines a precision operational amplifier with highly-matched resistors to form a one-chip solution for accurately amplifying voltages. Gains from –13 to +14 with accuracy of 0.006% (60ppm) can be achieved using no external components. The LT1997-3 is particularly well suited for use as a difference amplifier, where the excellent resistor matching results in a common mode rejection ratio of greater than 91dB. nn The amplifier features a 60μV maximum input offset voltage and a –3dB bandwidth of 1.1MHz (Gain = 1). The LT1997-3 operates from any supply voltage from 3.3V to 50V and draws only 350μA supply current. The output typically swings to within 100mV of either supply rail. 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. APPLICATIONS 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 LT1997-3 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 Typical Distribution of CMRR (G = 1) Gain = 1 Difference Amplifier VSOURCE = –28V TO 26.5V 1200 15V V+ LT1997-3 –INA –INB –INC VS = ±15V VCM = –28V TO +26.5V 1000 4625 UNITS FROM 3 RUNS 7.5k 22.5k – 22.5k RSENSE 1Ω RC 1Ω OUT + 22.5k 7.5k 2.5k LOAD +INA +INB +INC 45k REF2 45k REF1 VOUT = ±1mV/mA SHDN V– –15V NUMBER OF UNITS 2.5k 800 600 400 200 0 –30 –20 –10 0 10 CMRR (µV/V = ppm) 20 30 19973 TA01b 19973 TA01a Rev A Document Feedback For more information www.analog.com 1 LT1997-3 ABSOLUTE MAXIMUM RATINGS (Note 1) Supply Voltages (V+ to V–).........................................60V +INA, –INA (Note 2).......................................... V– ±160V +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-3.................................................–40 to 85°C LT1997H-3.............................................. –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 1 +INB 3 TOP VIEW 14 –INA 15 V– +INA 1 16 –INA 12 –INB +INB 3 14 –INB 11 NC +INC REF1 REF2 V– NC 4 +INC 5 SHDN 6 10 –INC 9 V+ REF 7 8 5 6 7 8 –INC V+ SHDN OUT 12 11 10 9 MS PACKAGE VARIATION: MS16 (12) 16-LEAD PLASTIC MSOP OUT TJMAX = 150°C, θJA = 130°C/W DF PACKAGE 14(12)-LEAD (4mm × 4mm) PLASTIC DFN TJMAX = 150°C, θJA = 45°C/W , θJC = 3°C/W EXPOSED PAD (PIN 15) IS V–, MUST BE SOLDERED TO PCB ORDER INFORMATION http://www.linear.com/product/LT1997-3#orderinfo LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LT1997IDF-3#PBF LT1997IDF-3#TRPBF 19973 14-Lead (4mm × 4mm) Plastic DFN –40°C to 85°C LT1997HDF-3#PBF LT1997HDF-3#TRPBF 19973 14-Lead (4mm × 4mm) Plastic DFN –40°C to 125°C LT1997IMS-3#PBF LT1997IMS-3#TRPBF 19973 16-Lead Plastic MSOP –40°C to 85°C LT1997HMS-3#PBF LT1997HMS-3#TRPBF 19973 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. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/. Rev A 2 For more information www.analog.com LT1997-3 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 = 1 Gain Error MIN TYP ±0.001 l ±0.001 G = 3 l ±0.002 G = 9 l ∆G/∆T Gain Drift vs Temperature (Note 6) VOUT = ±10V GNL Gain Nonlinearity VOUT = ±10V ±0.2 l ±1 l VOS Op Amp Offset Voltage (Note 9) V– < VCMOP < V+ – 1.75V ±20 l ∆VOS/∆T IB Op Amp Offset Voltage Drift (Note 6) V– < VCMOP < V+ – 1.75V Op Amp Input Bias Current V– + 0.25V < V CMOP RIN CMRR Op Amp Input Offset Current Input Impedance (Note 8) Common Mode Rejection Ratio, MS16 Package Common Mode G = 1 G = 3 G = 9 Differential G = 1 G = 3 G = 9 G = 1, VCM = –28V to +26.5V 26 17.4 14.5 kΩ kΩ kΩ l l l 38 12.6 4.2 91 87 90 86 96 94 91 87 83 80 81 77 81 78 90 86 96 94 –30 –160 –15 –15 45 15 5 106 52 17.4 5.8 kΩ kΩ kΩ dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB V V V V G = 9, VCM = –15V to +14.7V l G = 1, VCM = –28V to +26.5V l l l l l G = 9, VCM = –15V to +14.7V l VCM Input Voltage Range (Note 7) +INA/–INA +INA/–INA, +INC/–INC Connected to Ground +INB/–INB +INC/–INC ppm ppm µV µV µV/°C 22.5 15 12.5 l G = 1, VCM = –90V to +90V, +INB = –INB = 0V, VS = ±25V G = 1, VCM = –120V to +120V, +INC = –INC = 0V, VS = ±25V, TA = –40°C to 125°C G = 1, VCM = –160V to +160V, +INC = –INC = 0V, VS = ±25V, TA = –40°C to 85°C G = 3, VCM = –15V to +17.6V ±2 ±3 ±60 ±200 ±1.5 19 12.6 10.5 l Common Mode Rejection Ratio, DF14 Package % % % % % % ppm/°C l l l G = 3, VCM = –15V to +17.6V CMRR ±0.006 ±0.012 ±0.015 ±0.02 ±0.03 ±0.04 ±1 l V– + 0.25V < VCMOP < V+ – 1.75V l l l l ±2 UNITS –5 –15 –3 –10 l IOS ±0.5 l < V+ – 1.75V MAX ±0.5 5 15 3 10 nA nA nA nA 99 112 101 94 91 91 98 103 26.5 160 17.6 14.7 Rev A For more information www.analog.com 3 LT1997-3 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 ∆R/R Reference Divider Matching Error ∆R R –R = REF1 REF2 R ⎛ RREF1 + RREF2 ⎞ ⎜⎝ ⎟⎠ 2 Available in MS16 Package Only PSRR Power Supply Rejection Ratio eni Input Referred Noise Voltage Density VS = ±1.65V to ±25V, VCM = VOUT = Mid-Supply (Note 9) f = 1kHz G = 1 G = 3 G = 9 f = 0.1Hz to 10Hz G = 1 G = 3 G = 9 No Load ISINK = 5mA No Load ISOURCE = 5mA 50Ω to V+ 50Ω to V– ∆VOUT = ±5V Input Referred Noise Voltage 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 MIN l 114 l l l l l l l 10 10 0.45 G = 1 G = 3 G = 9 G = 1 0.1%, ∆VOUT = 10V 0.01%, ∆VOUT = 10V G = 3 0.1%, ∆VOUT = 10V 0.01%, ∆VOUT = 10V G = 9 0.1%, ∆VOUT = 10V 0.01%, ∆VOUT = 10V Supply Voltage 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 Supply Current MAX ±0.001 ±0.006 ±0.012 l l IS TYP l dB 50 30 22 nV/√Hz nV/√Hz nV/√Hz 1.4 1 0.8 100 280 100 530 28 30 0.75 150 500 180 900 µVP-P µVP-P µVP-P mV mV mV mV mA mA V/µs 1100 700 300 kHz kHz kHz 14.6 95 µs µs 13.6 29 µs µs 13.8 29 µs µs V V µs 3 3.3 50 50 –2.5 –1.2 V V –10 –15 µA 350 400 600 25 70 µA µA µA µA l 20 l % % 124 16 Active, VSHDN ≥ V+ – 1.2V Active, VSHDN ≥ V+ – 1.2V Shutdown, VSHDN ≤ V+ – 2.5V Shutdown, VSHDN ≤ V+ – 2.5V UNITS Rev A 4 For more information www.analog.com LT1997-3 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 = 1 Gain Error MIN TYP ±0.001 l ±0.001 G = 3 l ±0.002 G = 9 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–