LT1126/LT1127 Dual/Quad Decompensated Low Noise, High Speed Precision Op Amps UFEATURESDESCRIPTIO ■ 100% Tested Low Voltage Noise: 2.7nV/√Hz Typ, The LT®1126 dual and LT1127 quad are high perfor- 4.2nV/√Hz Max mance, decompensated op amps that offer higher slew ■ Slew Rate: 11V/µs Typ rate and bandwidth than the LT1124 dual and the LT1125 ■ Gain-Bandwidth Product: 65MHz Typ quad operational amplifiers. The enhanced AC perfor- ■ Offset Voltage, Prime Grade: 70µV Max mance is available without degrading DC specs of the Low Grade: 100µV Max LT1124/LT1125. Both LT1126/LT1127 are stable in a gain ■ High Voltage Gain: 5 Million Min of 10 or more. ■ Supply Current Per Amplifier: 3.1mA Max ■ In the design, processing and testing of the device, par- Common Mode Rejection: 112dB Min ■ ticular attention has been paid to the optimization of the Power Supply Rejection: 116dB Min ■ entire distribution of several key parameters. Slew rate, Available in 8-Lead SOIC, 8-Lead DIP, 16-Lead SO gain-bandwidth and 1kHz noise are 100% tested for each and 14-Lead DIP Packages individual amplifier. Consequently, the specifications of U even the lowest cost grades (the LT1126C and the LT1127C) APPLICATIO S have been enhanced. ■ Two and Three Op Amp Instrumentation Amplifiers Power consumption of the dual LT1126 is less than one ■ Low Noise Signal Processing half of two OP-37s. Low power and high performance in an ■ Active Filters 8-pin SO package makes the LT1126 a first choice for ■ Microvolt Accuracy Threshold Detection surface mounted systems and where board space is ■ Strain Gauge Amplifiers restricted. ■ Direct Coupled Audio Gain Stages ■ Tape Head Preamplifiers , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including ■ Microphone Preamplifiers 4775884, 4837496. ■ Accelerometer Amplifiers ■ Infrared Detectors UTYPICAL APPLICATIOLow Noise, Wide Bandwidth Instrumentation AmplifierVoltage Noise vs Frequency 100 – INPUT + 620Ω 10k V = 15V S ± 1/4 √ T = 25 A °C LT1127 30 – 6.2k 200Ω 10 MAXIMUM – 1/4 3 6.2k – OUTPUT LT1127 620Ω TYPICAL 1/4 1/f CORNER + LT1127 RMS VOLTAGE NOISE DENSITY (nV/ Hz) 2.3Hz + INPUT + 1 10k 0.1 1.0 10 100 1000 FREQUENCY (Hz) 1126-7 TA01b GAIN = 1000, BANDWIDTH = 480kHz INPUT REFERRED NOISE = 4.5nV/ Hz AT 1kHz, 6 √ µV 1126-7 TA01 RMS OVER BANDWIDTH 11267fa 1
