LT1793CS8#TRPBF

Instrumentation, Op Amps, Buffer Amps Overview

The LT1793CS8#TRPBF is a single-channel, low noise operational amplifier manufactured by Analog Devices Inc. It features JFET input technology with a typical gain-bandwidth product of 4.2 MHz and a slew rate of 3.4 V/µs. The device exhibits an input bias current of 3 pA and an input voltage noise density of 6 nV/√Hz at 1 kHz. It operates within a supply voltage range of ±5 V to ±20 V and functions reliably across a temperature range of -40°C to +85°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Extremely low input bias current maintained over the entire common mode range
• Low voltage noise combined with picoampere current noise for high impedance transducers
• Unconditionally stable for gains of one or more with capacitive loads
• Eliminates phase reversal when input exceeds common mode range

Instrumentation, Op Amps, Buffer Amps Applications

• Photocurrent amplifiers
• Hydrophone amplifiers
• High sensitivity piezoelectric accelerometers
• Low voltage and current noise instrumentation amplifier front ends
• Active filters

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging configuration. Confirm that the CS8 designation corresponds to the commercial grade S8 package variant. Ensure compatibility with the required operating temperature range and supply voltage specifications before finalizing procurement orders.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component for applications requiring minimal signal degradation from high source impedances. The combination of low voltage noise and extremely low current noise makes it suitable for buffering signals from high impedance transducers. Consider the 4.2 MHz bandwidth and 3.4 V/µs slew rate for AC signal processing requirements.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the LT1793 family of low noise, picoampere bias current, JFET input operational amplifiers. The series is designed to provide the lowest total noise for high impedance transducer applications. It serves as a direct replacement for other JFET op amps like the OPA111 and AD645 in PDIP packages while offering superior noise performance.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

LT1169

Instrumentation, Op Amps, Buffer Amps FAQ

Does the LT1793 experience phase reversal if the input voltage exceeds the common mode range?

No, the LT1793 is designed to eliminate phase reversal. It clips cleanly and recovers without phase reversal even when the input swings beyond the common mode range, such as at -5V supplies with a -5.2V input.

How does the input bias current behave across the common mode range?

Unlike most JFET op amps, the LT1793 maintains its very low input bias current (3 pA typ) over the entire common mode range, resulting in an extremely high input resistance of 10^13 Ω.