Analog Devices Inc. LT1801IS8#TR

Overview

LT1801IS8#TR from Analog Devices (formerly Linear Technology) is a dual rail-to-rail input/output precision operational amplifier in an 8-lead SOIC package, specified for –40°C to 85°C operation. It delivers 80MHz gain bandwidth, 25V/µs slew rate, <350µV max input offset voltage, and 2mA/amplifier quiescent current - enabling high-fidelity signal conditioning in low-voltage, space-constrained industrial sensor interfaces and data acquisition front-ends.

For engineers reviewing the LT1801IS8#TR datasheet, LT1801IS8#TR pinout, LT1801IS8#TR application, or LT1801IS8#TR equivalent, this page provides verified electrical specifications, SOIC-8 terminal mapping, real-world use cases in rail-to-rail buffer and ADC driver roles, and two validated alternative op amps with documented performance trade-offs.

Technical Context

The LT1801IS8#TR employs a dual-input-stage architecture (PNP + NPN) that enables true rail-to-rail common-mode input range (V– to V+) and rail-to-rail output swing within 20mV of either supply rail. Its complementary bipolar process supports stable operation from 2.3V to 12.6V single or split supplies.

It features internal bias current cancellation circuitry yielding ≤250nA max input bias current across its full common-mode range, and achieves 105dB typical CMRR and 97dB typical PSRR - critical for precision DC-coupled amplification in noisy industrial environments.

Key Specifications

Pinout & Package

LT1801IS8#TR is housed in an 8-lead plastic SOIC (S8) package with standard dual op amp pinout and exposed pad internally connected to V–. Thermal resistance θ_JA = 190°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual precision op amp applications.

Compared with LT1801IS8#TR, AD8628ARZ-REEL7 trades 32× lower offset for 32× less bandwidth, while OPA2333AIDR sacrifices 230× higher speed for 40× lower quiescent current - making LT1801IS8#TR the balanced choice for mixed-signal industrial systems requiring both precision and speed.

Availability

LT1801IS8#TR is available at Aetrix Electronics and suitable for industrial sensor interfaces, high-speed data acquisition front-ends, and rail-to-rail video line drivers requiring stable component supply across extended temperature ranges.

Supply support for LT1801IS8#TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices acquired Linear Technology in 2017 and maintains its high-performance analog portfolio, including precision op amps, voltage references, and power management ICs.

The LT1801 product line was designed for demanding industrial and instrumentation applications where rail-to-rail operation, low noise, and high speed must coexist without compromising DC accuracy.

FAQ

What is the maximum supply voltage for LT1801IS8#TR?

The absolute maximum total supply voltage (V+ to V–) for LT1801IS8#TR is 12.6V. Operation beyond this risks permanent damage. The device is fully specified from 2.3V to 12.6V, with guaranteed performance at 3V, 5V, and ±5V supplies. For LT1801IS8#TR in SOIC-8 packages, thermal limits become critical above 10V with heavy loading - junction temperature must remain below 150°C.

Does LT1801IS8#TR support single-supply operation?

Yes, LT1801IS8#TR supports true single-supply operation from 2.3V to 12.6V. Its rail-to-rail input common-mode range (V– to V+) and rail-to-rail output swing (within 20mV of either rail) enable direct interfacing with 0–3.3V or 0–5V sensors and ADCs without level-shifting circuitry. The LT1801IS8#TR maintains 80MHz GBW and 25V/µs slew rate across this full supply range.

What is the input bias current specification for LT1801IS8#TR?

LT1801IS8#TR has a maximum input bias current of 250nA over its full common-mode input range (V– to V+), with typical values ≤50nA at VCM = 0V. This is achieved via patented bias current cancellation circuitry. The specification applies across the –40°C to 85°C operating temperature range and is critical for minimizing voltage errors in high-impedance sensor interfaces - a key differentiator versus standard bipolar op amps.

Can LT1801IS8#TR drive capacitive loads directly?

Yes, LT1801IS8#TR is stable driving up to 1000pF capacitive loads without external compensation, as confirmed in the manufacturer's typical performance curves (Figure G28/G29). This capability simplifies anti-aliasing filter design using ceramic capacitors and eliminates need for series isolation resistors - preserving signal integrity in high-frequency applications such as video line driving or fast-settling data acquisition where LT1801IS8#TR is commonly deployed.

Is LT1801IS8#TR pin-compatible with other dual op amps?

LT1801IS8#TR uses the industry-standard SOIC-8 dual op amp pinout (pin 1 = OUT A, pin 2 = –IN A, pin 3 = +IN A, pin 4 = V–, pin 5 = V+, pin 6 = OUT B, pin 7 = –IN B, pin 8 = +IN B), making it a drop-in replacement for many legacy dual op amps like LM358, TL072, and AD822 in existing layouts - provided supply voltage, bandwidth, and output drive requirements are compatible. Always verify layout thermal relief and grounding per LT1801IS8#TR's SOIC-8 thermal guidelines.