Analog Devices Inc. LT1004CS8-1.2#PBF

Overview

LT1004CS8-1.2#PBF from Analog Devices (formerly Linear Technology) is a 2-terminal micropower bandgap voltage reference IC 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, portable test equipment, and current-loop transmitters.

For engineers reviewing the LT1004CS8-1.2#PBF datasheet, LT1004CS8-1.2#PBF pinout, LT1004CS8-1.2#PBF application, or LT1004CS8-1.2#PBF equivalent, key selection criteria include guaranteed 10µA minimum operating current, reverse dynamic impedance ≤1.5Ω at 100µA, long-term stability of 20ppm/kHr, and SO-8 package compatibility with industrial temperature range (0°C to 70°C).

Technical Context

The LT1004CS8-1.2#PBF implements a bandgap-derived 2-terminal shunt reference architecture optimized for micropower operation. Its design achieves high initial accuracy without trimming by tightly controlling process parameters and performing lot-level statistical screening - evidenced by >99% yield within ±4mV for the -1.2 variant.

It operates as a 2-terminal device requiring an external current source, with reverse breakdown behavior defining its regulation point. The SO-8 package includes four no-connect (NC) pins and dual VOUT/GND terminals to support layout flexibility while maintaining low thermal resistance (θ_JA = 120°C/W) and stable performance across its full 0°C to 70°C operating range.

Key Specifications

Pinout & Package

LT1004CS8-1.2#PBF uses an 8-lead plastic SO (narrow, 0.150") package (S8), with thermal resistance θ_JA = 120°C/W and maximum junction temperature of 150°C. Pin 1 is marked via bevel edge or dimple per LTC DWG #05-08-1610 Rev G.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LT1004CS8-1.2#PBF, LT1634IMS8-1.2#PBF offers superior drift and accuracy but demands PCB redesign, while TLVH431ACDBVR trades precision for size and cost - making LT1004CS8-1.2#PBF optimal for legacy-compatible, battery-efficient industrial instrumentation.

Availability

LT1004CS8-1.2#PBF is available at Aetrix Electronics and suitable for portable test instruments, battery-operated data loggers, and current loop transmitters requiring stable component supply with guaranteed long-term availability and lead-free compliance.

Supply support for LT1004CS8-1.2#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.

The LT1004CS8-1.2#PBF belongs to Linear Technology's precision voltage reference product line, engineered specifically for micropower, high-accuracy applications in portable and industrial instrumentation where low quiescent current and tight initial tolerance are essential.

FAQ

What is the guaranteed initial accuracy of the LT1004CS8-1.2#PBF?

The LT1004CS8-1.2#PBF has a guaranteed initial accuracy of ±4mV at 25°C, corresponding to ±0.32% of its nominal 1.235V output. This specification is tested and binned during production, ensuring >99% of units fall within this window without trimming - a key advantage over legacy references like the LM385 series.

Can the LT1004CS8-1.2#PBF operate from a 1.5V battery?

Yes - the LT1004CS8-1.2#PBF can regulate from a 1.5V battery when used with appropriate current limiting. Application Note TA12 demonstrates a working circuit achieving 1.235V output down to 1.285V input at zero load, leveraging its 10µA minimum operating current and low dropout behavior in forward conduction mode.

What is the maximum reverse current rating for the LT1004CS8-1.2#PBF?

The absolute maximum reverse breakdown current for the LT1004CS8-1.2#PBF is 30mA, as specified in the Absolute Maximum Ratings table. For reliable long-term operation, continuous reverse current should be limited to ≤20mA, and transient surges must stay below 30mA to prevent junction degradation or parametric shift.

Does the LT1004CS8-1.2#PBF require external capacitors for stability?

No - the LT1004CS8-1.2#PBF is inherently stable and does not require external output capacitors. Its low dynamic impedance (≤1.5Ω) and wideband noise characteristics (60µV RMS) are characterized without added capacitance. However, a 100nF ceramic capacitor may be added locally to further reduce high-frequency noise in sensitive measurement paths.

How does the LT1004CS8-1.2#PBF compare to the LT1004CZ-1.2#PBF?

The LT1004CS8-1.2#PBF and LT1004CZ-1.2#PBF share identical electrical specifications (±4mV accuracy, 20ppm/°C tempco, 10µA min current), but differ in package and thermal performance: the CS8 uses an 8-lead SO package (θ_JA = 120°C/W), while the CZ uses a 3-lead TO-92 (θ_JA = 160°C/W). The SO package offers better power dissipation and PCB assembly compatibility for automated SMT lines.