ADI LT1793CS8 Low Noise Picoampere Bias Current JFET Input Operational Amplifiers
Product Description Of LT1793CS8
LT1793CS8 achieves a new standard of excellence in noise performance for a JFET op amp. For the first time low voltage noise (6nV/√Hz) is simultaneously offered with extremely low current noise (0.8fA/√Hz), providing the lowest total noise for high impedance transducer applications. Unlike most JFET op amps, the very low input bias current (3pA typ) is maintained over the entire common mode range which results in an extremely high input resistance (1013Ω). When combined with a very low input capacitance (1.5pF) an extremely high input impedance results, making the LT1793CS8 the first choice for amplifying low level signals from high impedance transducers. The low input capacitance also assures high gain linearity when buffering AC signals from high impedance transducers.
LT1793CS8 is unconditionally stable for gains of 1 or more, even with 1000pF capacitive loads. Other key features are 250µV VOS and a voltage gain over 4 million. Each individual amplifier is 100% tested for voltage noise, slew rate (3.4V/µs) and gain-bandwidth product (4.2MHz). Specifications at ±5V supply operation are also provided.
Feature Of LT1793CS8
Input Bias Current, Warmed Up: 10pA Max
100% Tested Low Voltage Noise: 8nV/√Hz Max
A Grade 100% Temperature Tested
Offset Voltage Over Temp: 1mV Max
Input Resistance: 1013Ω
Very Low Input Capacitance: 1.5pF
Voltage Gain: 1 Million Min
Gain-Bandwidth Product: 4.2MHz Typ
Guaranteed Specifications with ±5V Supplies
Applications Of LT1793CS8
Photocurrent Amplifiers
Hydrophone Amplifiers
High Sensitivity Piezoelectric Accelerometers
Low Voltage and Current Noise Instrumentation Amplifier Front Ends
Two and Three Op Amp Instrumentation Amplifiers
Active Filters
Low Noise Light Sensor with DC Servo
1kHz Output Voltage Noise Density vs Source Resistance
Inverting and Noninverting Gain Configurations
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