Datasheet LT1991 (Analog Devices) - 6

LT1991
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. 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 40 55 mV VS = 5V, 0V l 75 mV VS = ±15V l 120 mV 1mA Load VS = 5V, 0V 150 225 mV VS = 5V, 0V l 300 mV VS = ±15V l 340 mV ISC Output Short-Circuit Current (Sourcing) Drive Output Positive; 8 12 mA Short Output to Ground l 4 mA Output Short-Circuit Current (Sinking) Drive Output Negative; 8 21 mA Short Output to VS or Midsupply l 4 mA 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 l 0.06 0.12 V/µs VS = ±15V; VOUT = ±10V; VMEAS = ±5V l 0.08 0.12 V/µs Is Supply Current VS = 5V, 0V 100 110 µA l 180 µA VS = ±15V 130 160 µA l 250 µA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 6:
This parameter is not 100% tested. may cause permanent damage to the device. Exposure to any Absolute
Note 7:
Input voltage range is guaranteed by the CMRR test at V Maximum Rating condition for extended periods may affect device S = ±15V. For the other voltages, this parameter is guaranteed by design and through reliability and lifetime. correlation with the ±15V test. See the Applications Information section to
Note 2:
The P3/M3 and P9/M9 inputs should not be taken more than 0.2V determine the valid input voltage range under various operating conditions. beyond the supply rails. The P1/M1 inputs can withstand ±60V if P9/M9
Note 8:
Offset voltage, offset voltage drift and PSRR are defined as are grounded and VS = ±15V (see Applications Information section about referred to the internal op amp. You can calculate output offset as follows. “High Voltage CM Difference Amplifiers”). In the case of balanced source resistance, VOS,OUT = VOS • NOISEGAIN
Note 3
: A heat sink may be required to keep the junction temperature + IOS • 450k + IB • 450k • (1– RP/RN) where RP and RN are the total below absolute maximum ratings. resistance at the op amp positive and negative terminal respectively.
Note 4
: Both the LT1991C and LT1991I are guaranteed functional over the
Note 9:
Applies to resistors that are connected to the inverting inputs. –40°C to 85°C temperature range. The LTC1991H is guaranteed functional Resistor matching is not tested directly, but is guaranteed by the gain over the –40°C to 125°C temperature range. error test.
Note 5:
The LT1991C is guaranteed to meet the specified performance
Note 10:
Input impedance is tested by a combination of direct from 0°C to 70°C and is designed, characterized and expected to meet measurements and correlation to the CMRR and gain error tests. specified performance from –40°C to 85°C but is not tested or QA sampled
Note 11:
I at these temperatures. The LT1991I is guaranteed to meet specified B and IOS are tested at VS = 5V, 0V only. performance from –40°C to 85°C. The LT1991H is guaranteed to meet specified performance from –40°C to 125°C. 1991fh 6 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts