Analog Devices Inc. LT1019IS8-2.5#TRPBF

Overview

LT1019IS8-2.5#TRPBF from Analog Devices (formerly Linear Technology) is a precision 2.5V bandgap voltage reference IC operating in series or shunt mode, featuring ±0.05% initial output tolerance, 10ppm/°C max temperature coefficient over –40°C to +85°C, ultralow 0.5ppm/V line regulation, and ±10mA sourcing/sinking capability - used in high-accuracy ADC/DAC biasing, precision regulators, and bridge excitation circuits.

For engineers reviewing the LT1019IS8-2.5#TRPBF datasheet, LT1019IS8-2.5#TRPBF pinout, LT1019IS8-2.5#TRPBF application, or LT1019IS8-2.5#TRPBF equivalent, this page delivers verified electrical specs, SO-8 package mapping, industrial-grade thermal performance data, trim and temp pin functionality, and real-world stability guidance for low-noise analog signal chains.

Technical Context

The LT1019IS8-2.5#TRPBF implements curvature-corrected thin-film bandgap architecture with wafer-level trimming of both reference and output stages, enabling <0.05% initial accuracy and 10ppm/°C TC over –40°C to +85°C. It supports dual-mode operation: series mode with <1.1V minimum input-output differential, and shunt mode with 0.5mA minimum shunt current.

Its TEMP pin provides PTAT voltage (~2.1mV/°C) with <0.05%/µA loading sensitivity, while the TRIM pin enables ±6% output adjustment. Output impedance is 0.02Ω typical, and ripple rejection exceeds 90dB at 50Hz–400Hz - critical for metrology-grade instrumentation and calibration systems.

Key Specifications

Pinout & Package

LT1019IS8-2.5#TRPBF is housed in an 8-lead plastic SOIC (S8) package per LTC DWG #05-08-1610, with gull-wing leads, 1.27mm pitch, and JEDEC MS-012 compliant footprint. Pin 1 is marked by a beveled corner or dot; device orientation follows standard SO-8 convention.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision voltage reference applications.

Compared with LT1019IS8-2.5#TRPBF, LT1236CS8-2.5 offers tighter TC but sacrifices shunt operation and increases quiescent current, while REF5025IDR improves TC and power efficiency but removes critical configurability via TRIM and TEMP pins - making LT1019IS8-2.5#TRPBF uniquely suited for field-calibratable, dual-mode industrial instrumentation.

Availability

LT1019IS8-2.5#TRPBF is available at Aetrix Electronics and suitable for high-accuracy data acquisition, precision bridge excitation, and industrial DAC biasing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LT1019IS8-2.5#TRPBF 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) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and aerospace markets.

The LT1019 product line was designed specifically for metrology-grade voltage referencing - emphasizing ultra-low drift, dual-mode flexibility, and robustness against line/load/thermal perturbations in harsh environments.

FAQ

What is the operating temperature range for the LT1019IS8-2.5#TRPBF?

The LT1019IS8-2.5#TRPBF is rated for industrial temperature operation from –40°C to +85°C. Its guaranteed specifications - including ±0.05% initial output tolerance and 10ppm/°C maximum temperature coefficient - apply across this full range. This makes the LT1019IS8-2.5#TRPBF suitable for deployment in factory-floor PLCs, outdoor sensor nodes, and other non-commercial environments where ambient extremes are expected.

Can the LT1019IS8-2.5#TRPBF operate in shunt mode without external components?

Yes, the LT1019IS8-2.5#TRPBF can operate in shunt mode with no external components: its INPUT pin is left floating, and the OUTPUT pin serves as the cathode of a precision 2.5V shunt reference. It requires only 0.5mA minimum shunt current and supports up to 10mA sink current. This configuration eliminates the need for series resistors in low-voltage or current-limited applications - a key advantage over traditional two-terminal shunt references like the TL431.

How does the TEMP pin on the LT1019IS8-2.5#TRPBF function, and what is its accuracy?

The TEMP pin on the LT1019IS8-2.5#TRPBF outputs a PTAT voltage of approximately 2.1mV/°C (e.g., ~620mV at 25°C), intended for relative temperature monitoring - not absolute measurement. Its loading sensitivity is <0.05%/µA, meaning drawing 1µA introduces less than 0.05% error in the 2.5V reference output. This low sensitivity allows safe connection to high-impedance monitoring circuits without degrading LT1019IS8-2.5#TRPBF reference accuracy.

What is the recommended output capacitance for stability with the LT1019IS8-2.5#TRPBF?

Unlike the 4.5V/5V/10V variants, the LT1019IS8-2.5#TRPBF can oscillate when sinking 1–6mA into 400pF–2µF capacitive loads. For stable operation, use ≥1mA DC load current, or add a 2–5Ω series resistor before the capacitor (e.g., 2µF tantalum + 2Ω). Configuration (a) in Figure 1 of the datasheet preserves DC accuracy; configuration (b) minimizes transient ringing. Avoid 500pF–1µF low-ESR ceramics without added series resistance.

Is the LT1019IS8-2.5#TRPBF pin-compatible with older bandgap references like the AD580 or REF-01?

Yes, the LT1019IS8-2.5#TRPBF is explicitly designed as a plug-in replacement for AD580, AD581, REF-01, REF-02, MC1400, MC1404, and LM168 - matching their 8-pin SOIC pinout and functional behavior. All key pins (OUTPUT, GND, TRIM, TEMP) align directly; no PCB redesign is needed. Its improved specs - tighter tolerance, lower TC, and dual-mode operation - deliver immediate performance uplift without layout changes.