Analog Devices Inc. LT1004CS8-2.5#TRPBF

Overview

LT1004CS8-2.5#TRPBF from Analog Devices is a 2-terminal micropower bandgap voltage reference IC delivering 2.500 V ±20 mV initial accuracy at 10 µA operating current, with 20 ppm/°C max temperature coefficient and 0.2 Ω reverse dynamic impedance - used in precision battery-powered instrumentation and current-loop transmitters.

For engineers reviewing the LT1004CS8-2.5#TRPBF datasheet, LT1004CS8-2.5#TRPBF pinout, LT1004CS8-2.5#TRPBF application, or LT1004CS8-2.5#TRPBF equivalent, key selection criteria include guaranteed 2.5 V output tolerance, ultra-low 10 µA minimum operating current, SO-8 package compatibility, and long-term stability of 20 ppm/kHr under 100 µA bias.

Technical Context

The LT1004CS8-2.5#TRPBF operates as a shunt (2-terminal) reference requiring external current source bias; its bandgap core achieves stable 2.5 V output across 0°C to 70°C ambient range without trimming. It maintains low dynamic impedance (≤0.6 Ω typ at 100 µA) and wide-band noise of 60 µV RMS (10 Hz–10 kHz), enabling high-resolution ADC reference and low-drift sensor excitation.

Unlike series references, it sinks current rather than sourcing it - necessitating proper external biasing above 10 µA and below 20 mA. Its SO-8 package includes four NC pins, two VOUT terminals, one GND, and two unused pins - supporting redundancy and layout flexibility while maintaining thermal resistance θ_JA = 120°C/W.

Key Specifications

Pinout & Package

LT1004CS8-2.5#TRPBF uses an 8-lead plastic SO package (S8, JEDEC MS-012AA) with 120°C/W junction-to-ambient thermal resistance and 150°C maximum junction temperature. Pin 1 is marked by bevel edge or dimple; leads are lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LT1004CS8-2.5#TRPBF, LT1634IMS8-2.5#PBF offers superior accuracy and drift performance at higher cost, while TL431ACDR provides broader market availability and simpler biasing but sacrifices micropower operation and precision - making LT1004CS8-2.5#TRPBF optimal for battery-constrained, medium-accuracy industrial sensing.

Availability

LT1004CS8-2.5#TRPBF is available at Aetrix Electronics and suitable for portable test instruments, battery-operated data loggers, and 4–20 mA current loop transmitters requiring stable component supply with consistent parametric performance across production lots.

Supply support for LT1004CS8-2.5#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, Inc. is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control systems.

The LT1004 family was designed by Linear Technology (acquired by Analog Devices in 2017) specifically for micropower, high-accuracy shunt voltage reference applications in portable and industrial instrumentation where low quiescent current and guaranteed initial tolerance are critical.

FAQ

What is the guaranteed initial accuracy of the LT1004CS8-2.5#TRPBF over its operating temperature range?

The LT1004CS8-2.5#TRPBF guarantees ±20 mV initial accuracy (±0.8%) over its full 0°C to 70°C operating temperature range. This specification is tested and binned during production, eliminating the need for system-level trimming. The LT1004CS8-2.5#TRPBF achieves this using optimized bandgap design and laser-trimmed thin-film resistors, ensuring consistent performance across manufacturing lots without user calibration.

Can the LT1004CS8-2.5#TRPBF operate from a 3 V supply in a battery-powered system?

Yes - the LT1004CS8-2.5#TRPBF can operate from a 3 V supply when configured with appropriate external biasing. Since it is a 2-terminal shunt reference, it requires a current source ≥10 µA flowing through it; a simple resistor from 3 V to the LT1004CS8-2.5#TRPBF anode yields ~80 µA bias (assuming 2.5 V drop), well within its 10 µA–20 mA operating window. The LT1004CS8-2.5#TRPBF maintains regulation down to 2.5 V input headroom, making it viable for single-cell lithium or alkaline systems.

Why does the LT1004CS8-2.5#TRPBF have two VOUT pins (pins 2 and 7) in its SO-8 package?

The dual VOUT pins (2 and 7) in the LT1004CS8-2.5#TRPBF provide redundant output connections to reduce effective output impedance and improve current sharing. When both pins are routed to the same net, they halve the trace resistance and inductance seen by the load, enhancing dynamic regulation during fast load transients. This design also allows flexible PCB layout - for example, routing one VOUT to an ADC reference input and the other to a DAC feedback node - without compromising stability. The LT1004CS8-2.5#TRPBF's internal structure connects both pins directly to the same die node.

How does the LT1004CS8-2.5#TRPBF compare to the LT1004CZ-2.5#TRPBF in terms of thermal performance?

The LT1004CS8-2.5#TRPBF has a junction-to-ambient thermal resistance (θ_JA) of 120°C/W, significantly lower than the LT1004CZ-2.5#TRPBF's 160°C/W due to the SO-8 package's superior heat-spreading capability versus the TO-92's plastic body. At 100 µA operating current, the LT1004CS8-2.5#TRPBF dissipates only 250 µW, resulting in <0.03°C self-heating - critical for low-drift applications. The LT1004CS8-2.5#TRPBF's SO-8 also supports reflow soldering and automated optical inspection, unlike the through-hole TO-92 variant.

Is the LT1004CS8-2.5#TRPBF RoHS-compliant and lead-free?

Yes - the LT1004CS8-2.5#TRPBF carries the #TRPBF suffix, indicating lead-free finish and RoHS compliance per EU Directive 2011/65/EU. Its terminations use matte tin plating over nickel barrier, qualified for standard SnPb and lead-free reflow profiles (J-STD-020). The LT1004CS8-2.5#TRPBF is also halogen-free and meets IPC/JEDEC J-STD-020 moisture sensitivity level 3 (MSL-3), with floor life of 168 hours at ≤30°C/60% RH before baking.