Analog Devices Inc. LT1004IS8-1.2#PBF

Overview

LT1004IS8-1.2#PBF from Analog Devices is a 2-terminal micropower bandgap voltage reference delivering 1.235V nominal output with ±4mV initial accuracy, 20ppm/°C max temperature coefficient, and guaranteed operation down to 10µA. It serves as a precision low-power reference in battery-operated instrumentation and portable test equipment requiring stable 1.2V-level biasing.

For engineers reviewing the LT1004IS8-1.2#PBF datasheet, LT1004IS8-1.2#PBF pinout, LT1004IS8-1.2#PBF application, or LT1004IS8-1.2#PBF equivalent, this page provides verified package mapping, validated pin functions, confirmed thermal performance across –40°C to +85°C, and real-world substitution guidance for shunt reference selection.

Technical Context

The LT1004IS8-1.2#PBF operates as a 2-terminal shunt reference, sinking current to regulate its cathode voltage at 1.235V. Its bandgap core achieves low dynamic impedance (≤0.6Ω at 100µA) and wide-band noise of 60µV RMS (10Hz–10kHz), enabling high-resolution ADC biasing without external filtering.

It requires no external components for basic operation and maintains stability with load currents from 10µA to 20mA. The S8 package supports thermal resistance of θ_JA = 120°C/W, enabling reliable use in compact industrial sensor nodes and handheld meters.

Key Specifications

Pinout & Package

LT1004IS8-1.2#PBF uses an 8-lead plastic SO (S8) package with two active terminals (V_OUT) and six no-connect (NC) pins. The device is internally configured as a 2-terminal shunt reference; only pins 4 (GND) and 5 (V_OUT) are electrically functional. Pins 1, 2, 3, 6, 7, and 8 are NC and must remain unconnected per datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LT1004IS8-1.2#PBF, LT1634CMR-1.2#TRPBF offers tighter accuracy and drift control at the cost of layout complexity, while TLVH431ACDBVR trades guaranteed 1.235V stability for programmability and higher quiescent current-neither is pin-compatible, and both require PCB changes.

Availability

LT1004IS8-1.2#PBF is available at Aetrix Electronics and suitable for portable test instruments, battery-operated systems, and current loop instrumentation requiring stable component supply with guaranteed –40°C to +85°C operation and long-term calibration integrity.

Supply support for LT1004IS8-1.2#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, Inc. is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and power management.

The LT1004 series was designed as a family of micropower 2-terminal shunt references targeting portable instrumentation, sensor signal chains, and energy-constrained industrial monitoring systems where low current and high accuracy are co-required.

FAQ

What is the guaranteed initial accuracy of the LT1004IS8-1.2#PBF?

The LT1004IS8-1.2#PBF has a guaranteed initial accuracy of ±4mV at 25°C, meaning its output voltage falls between 1.231V and 1.239V when tested at 100µA reverse current. This specification applies across the full –40°C to +85°C operating range for the I-grade version, and is confirmed in the Electrical Characteristics table of the official datasheet.

Can the LT1004IS8-1.2#PBF operate from a 1.5V battery?

Yes - the LT1004IS8-1.2#PBF can regulate from a 1.5V battery source, as demonstrated in the "1.2V Reference from 1.5V Battery" typical application (Figure TA12). With appropriate current-limiting resistor, it delivers 1.235V output while drawing only ~10µA, allowing regulation down to 1.285V at zero load current - making it viable for single-cell alkaline or lithium primary systems.

What is the maximum operating current for the LT1004IS8-1.2#PBF?

The LT1004IS8-1.2#PBF is rated to operate up to 20mA reverse current, as specified in the Applications section and Absolute Maximum Ratings. At this current, it maintains regulation with minimal additional voltage deviation (≤20mV change from nominal), supporting high-precision current-source configurations and robust transient load handling in industrial transmitters.

Does the LT1004IS8-1.2#PBF require external capacitors for stability?

No - the LT1004IS8-1.2#PBF is internally compensated and requires no external capacitors for basic shunt operation. Its low dynamic impedance (≤0.6Ω) and inherent bandwidth allow direct connection to ADC reference inputs or op-amp bias nodes. Capacitors may be added for noise reduction in sensitive applications, but are not needed for stability per the datasheet's Typical Applications.

How does the LT1004IS8-1.2#PBF differ from the LT1004CS8-1.2#PBF?

The LT1004IS8-1.2#PBF and LT1004CS8-1.2#PBF share identical electrical specifications and S8 package, but differ in temperature rating: the 'I' suffix denotes –40°C to +85°C operation, while the 'C' suffix is rated for 0°C to +70°C. Both meet ±4mV initial accuracy and 20ppm/°C tempco within their respective ranges, but only the LT1004IS8-1.2#PBF is qualified for extended industrial environments.