Analog Devices Inc. LT1884AIS8#PBF

Overview

LT1884AIS8#PBF from Analog Devices (formerly Linear Technology) is a dual precision rail-to-rail output operational amplifier with picoamp-level input bias current (≤400 pA), 50 µV max input offset voltage, and 1 V/µs slew rate. It operates from ±1.35 V to ±15 V or 2.7 V to 36 V single supply, delivering 40 mV low-side and 220 mV high-side output swing near rails - ideal for thermocouple amplification and battery-powered instrumentation.

For engineers reviewing the LT1884AIS8#PBF datasheet, LT1884AIS8#PBF pinout, LT1884AIS8#PBF application, or LT1884AIS8#PBF equivalent, key selection criteria include guaranteed −40°C to +85°C operation, matched dual-channel performance (ΔVOS ≤ 70 µV), ultra-low noise (9.5 nV/√Hz), and SO-8 package compatibility with standard op amp footprints.

Technical Context

The LT1884AIS8#PBF uses a bipolar input stage with on-chip bias current cancellation to achieve 400 pA max input bias current while maintaining 0.8 µV/°C max offset drift. Its rail-to-rail output stage employs complementary common-emitter followers enabling 220 mV headroom at VCC and 40 mV at VEE under load.

It features 1.2 MHz gain-bandwidth product, 108 dB min CMRR, and 132 dB min PSRR - all specified over full −40°C to +85°C temperature range. Input voltage range extends to VEE + 1.2 V and VCC − 1.2 V, with differential input protection rated to ±10 V.

Key Specifications

Pinout & Package

LT1884AIS8#PBF is housed in an 8-lead plastic SO (SO-8) package, 3.9 mm × 4.9 mm, with standard dual op amp pinout and JEDEC MS-012AC footprint compatibility.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2050IMS8#PBF and OPA2188AIDR, LT1884AIS8#PBF offers the best balance of speed (1 V/µs, 1.2 MHz), low input bias (400 pA), and industrial temperature guarantee - making it optimal for dual-channel sensor signal chains needing both precision and responsiveness.

Availability

LT1884AIS8#PBF is available at Aetrix Electronics and suitable for thermocouple amplification, bridge transducer conditioning, and precision integrator applications requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for LT1884AIS8#PBF 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 legacy of high-performance analog ICs with rigorous testing and industrial-grade reliability.

The LT1884 series belongs to Linear Technology's precision op amp product line, designed specifically for low-drift, low-bias-current signal conditioning in sensor interfaces, medical instrumentation, and portable test equipment.

FAQ

What is the operating temperature range guaranteed for LT1884AIS8#PBF?

The LT1884AIS8#PBF is fully specified and tested over −40°C to +85°C. Unlike commercial-grade variants (e.g., LT1884CS8), the "I" grade guarantees all electrical parameters-including input offset voltage, bias current, and CMRR-across this full industrial range without derating. This makes LT1884AIS8#PBF suitable for deployment in uncontrolled environments such as factory floors or outdoor monitoring systems.

Does LT1884AIS8#PBF support true rail-to-rail input operation?

No, LT1884AIS8#PBF does not feature rail-to-rail input. Its input common-mode range is limited to VEE + 1.2 V and VCC − 1.2 V. Exceeding this range causes gain collapse but no phase reversal. For example, with a 5 V single supply, valid input voltage is 1.2 V to 3.8 V. This limitation necessitates level-shifting or biasing for signals near ground or VCC, unlike true RRI op amps such as the LTC6078.

Can LT1884AIS8#PBF drive capacitive loads directly?

LT1884AIS8#PBF can drive up to 300 pF in unity-gain configuration without instability, as confirmed in the datasheet's Typical Performance Characteristics. For larger loads or higher gains, a small isolation resistor (e.g., 10–50 Ω) between output and capacitance restores phase margin. This capability simplifies anti-aliasing filter design in data acquisition front-ends without requiring external buffers.

How does the input bias current matching affect dual-amplifier applications?

LT1884AIS8#PBF specifies ΔIB+ ≤ 600 pA (max) between +IN A and +IN B pins. This tight matching minimizes offset errors in differential configurations-such as instrumentation amplifier front-ends-where mismatched bias currents would generate common-mode–to–differential conversion. It also reduces drift-induced errors in precision averaging circuits using both amplifiers.

Is LT1884AIS8#PBF pin-compatible with other dual SO-8 op amps?

Yes, LT1884AIS8#PBF uses the industry-standard dual op amp pinout (SO-8): Pin 1 = OUT A, Pin 2 = −IN A, Pin 3 = +IN A, Pin 4 = V−, Pin 5 = +IN B, Pin 6 = −IN B, Pin 7 = OUT B, Pin 8 = V+. This allows direct replacement of many generic dual op amps (e.g., LM2904, TL072) in existing layouts-provided input/output swing, bias current, and bandwidth requirements are met.