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LT1991AIMS-PBF Datasheet(PDF) 6 Page - Linear Technology |
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LT1991AIMS-PBF Datasheet(HTML) 6 Page - Linear Technology |
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6 / 28 page  LT1991 6 1991fg SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS PSRR Power Supply Rejection Ratio VS = ±1.35V to ±18V (Note 8) l 105 135 dB Minimum Supply Voltage l 2.4 2.7 V VOUT Output Voltage Swing (to Either Rail) No Load VS = 5V, 0V VS = 5V, 0V VS = ±15V l l 40 55 75 120 mV mV mV 1mA Load VS = 5V, 0V VS = 5V, 0V VS = ±15V l l 150 225 300 340 mV mV mV ISC Output Short-Circuit Current (Sourcing) Drive Output Positive; Short Output to Ground l 8 4 12 mA mA Output Short-Circuit Current (Sinking) Drive Output Negative; Short Output to VS or Midsupply l 8 4 21 mA mA BW –3dB Bandwidth G = 1 G = 3 G = 9 110 78 40 kHz kHz kHz GBWP Op Amp Gain Bandwidth Product f = 10kHz 560 kHz tr, tf Rise Time, Fall Time G = 1; 0.1V Step; 10% to 90% G = 9; 0.1V Step; 10% to 90% 3 8 μs μs ts Settling Time to 0.01% G = 1; VS = 5V, 0V; 2V Step G = 1; VS = 5V, 0V; –2V Step G = 1; VS = ±15V, 10V Step G = 1; VS = ±15V, –10V Step 42 48 114 74 μs μs μs μs SR Slew Rate VS = 5V, 0V; VOUT = 1V to 4V VS = ±15V; VOUT = ±10V; VMEAS = ±5V l l 0.06 0.08 0.12 0.12 V/μs V/μs Is Supply Current VS = 5V, 0V l 100 110 180 μA μA VS = ±15V l 130 160 250 μA μA ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the operating temperature range of –40°C to 125°C for H-grade parts, otherwise specifications are at TA = 25°C. Difference amplifier configuration, VS = 5V, 0V or ±15V; VCM = VREF = half supply, unless otherwise noted. Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The P3/M3 and P9/M9 inputs should not be taken more than 0.2V beyond the supply rails. The P1/M1 inputs can withstand ±60V if P9/M9 are grounded and VS = ±15V (see Applications Information section about “High Voltage CM Difference Amplifiers”). Note 3: A heat sink may be required to keep the junction temperature below absolute maximum ratings. Note 4: Both the LT1991C and LT1991I are guaranteed functional over the –40°C to 85°C temperature range. The LTC1991H is guaranteed functional over the –40°C to 125°C temperature range. Note 5: The LT1991C is guaranteed to meet the specified performance from 0°C to 70°C and 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 LT1991I is guaranteed to meet specified performance from –40°C to 85°C. The LT1991H is guaranteed to meet specified performance from –40°C to 125°C. Note 6: This parameter is not 100% tested. Note 7: Input voltage range is guaranteed by the CMRR test at VS = ±15V. For the other voltages, this parameter is guaranteed by design and through correlation with the ±15V test. See the Applications Information section to determine the valid input voltage range under various operating conditions. Note 8: Offset voltage, offset voltage drift and PSRR are defined as referred to the internal op amp. You can calculate output offset as follows. In the case of balanced source resistance, VOS,OUT = VOS • NOISEGAIN + IOS • 450k + IB • 450k • (1– RP/RN) where RP and RN are the total resistance at the op amp positive and negative terminal respectively. Note 9: Applies to resistors that are connected to the inverting inputs. Resistor matching is not tested directly, but is guaranteed by the gain error test. Note 10: Input impedance is tested by a combination of direct measurements and correlation to the CMRR and gain error tests. Note 11: IB and IOS are tested at VS = 5V, 0V only. |
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