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LT1991ACDD Datasheet(PDF) 4 Page - Linear Integrated Systems |
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LT1991ACDD Datasheet(HTML) 4 Page - Linear Integrated Systems |
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4 / 24 page  LT1991 4 1991fb The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. Difference amplifier configuration, VS = 5V, 0V or ±15V; VCM = VREF = half supply, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VOUT Output Voltage Swing (to Either Rail) No Load VS = 5V, 0V 40 55 mV VS = 5V, 0V ● 65 mV VS = ±15V ● 110 mV 1mA Load VS = 5V, 0V 150 225 mV VS = 5V, 0V ● 275 mV VS = ±15V ● 300 mV ISC Output Short-Circuit Current (Sourcing) Drive Output Positive; 8 12 mA Short Output to Ground ● 4mA Output Short-Circuit Current (Sinking) Drive Output Negative; 8 21 mA Short Output to VS or Midsupply ● 4mA BW –3dB Bandwidth G = 1 110 kHz G = 3 78 kHz G = 9 40 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% 3 µs G = 9; 0.1V Step; 10% to 90% 8 µs ts Settling Time to 0.01% G = 1; VS = 5V, 0V; 2V Step 42 µs G = 1; VS = 5V, 0V; –2V Step 48 µs G = 1; VS = ±15V, 10V Step 114 µs G = 1; VS = ±15V, –10V Step 74 µs SR Slew Rate VS = 5V, 0V; VOUT = 1V to 4V ● 0.06 0.12 V/µs VS = ±15V; VOUT = ±10V ● 0.08 0.12 V/µs IS Supply Current VS = 5V, 0V 100 110 µA ● 150 µA VS = ±15V 130 160 µA ● 210 µA Note 1: Absolute Maximum Ratings are those beyond which the life of the device may be impaired. 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. 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. 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 impedence is tested by a combination of direct measurements and correlation to the CMRR and gain error tests. ELECTRICAL CHARACTERISTICS |
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