Analog Devices Inc. 85514012A

Overview

85514012A from Analog Devices is a precision 5.0 V voltage reference IC with ±0.3% initial accuracy (A/E grade), 8.5 ppm/°C max temperature coefficient, and 15 µV_p-p (0.1–10 Hz) low-frequency noise - used as a stable excitation source in high-resolution 16-bit+ ADCs and DACs within industrial data acquisition systems.

For engineers reviewing the 85514012A datasheet, 85514012A pinout, 85514012A application, or 85514012A equivalent, this page delivers verified specifications, package-confirmed pin functions, real-world application context, and two validated alternative parts for design flexibility and supply continuity.

Technical Context

The 85514012A implements a laser-trimmed bandgap core with PTAT current generation and buffered output stage, delivering stable 5.0 V across −55°C to +125°C (A/E grades). It integrates a dedicated TEMP pin providing 580 mV at 25°C with 1.96 mV/°C linear slope for on-chip temperature monitoring.

It features a TRIM terminal enabling ±3.0% output adjustment via external potentiometer, supports up to 10 mA load current, operates from 7.0 V to 36 V input, and maintains <100 ppm/V line regulation over full temperature range - all without requiring external capacitors for basic stability.

Key Specifications

Pinout & Package

85514012A is supplied in an 8-lead SOIC package (S-suffix), with thermal resistance θ_JA = 130°C/W and θ_JC = 43°C/W. Pin 1 is NC (no internal connection); pins 7 and 8 are also NC and must remain unconnected or grounded per datasheet guidance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 85514012A, ADR02ARZ offers tighter accuracy and lower noise in same footprint but lacks −55°C rating, while REF5050AID delivers superior long-term stability at the cost of non-interchangeable pinout and higher unit price.

Availability

85514012A is available at Aetrix Electronics and suitable for industrial data acquisition, precision instrumentation, military telemetry, and high-resolution sensor signal conditioning requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for 85514012A 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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The REF01/REF02/REF03 series - including 85514012A - was engineered for precision measurement systems requiring stable, low-drift references in harsh environments, with emphasis on industrial, military, and aerospace reliability.

FAQ

What is the guaranteed initial accuracy of the 85514012A over temperature?

The 85514012A (REF02A grade) guarantees ±0.3% initial accuracy at 25°C and maintains ≤8.5 ppm/°C temperature coefficient from −55°C to +125°C. This corresponds to ±0.102% total variation over full range - verified per Rev. M datasheet Table on Page 4 under REF02 Specifications.

Can the 85514012A drive a 10 kΩ load directly without external buffering?

Yes - the 85514012A sources up to 10 mA with <100 ppm/mA load regulation. A 10 kΩ load draws only 0.5 mA at 5 V, well within spec; output deviation remains <0.05% and requires no buffer. Verified in REF02 Load Regulation section (Page 4, Table).

Does the 85514012A require input or output capacitors for stability?

No - the 85514012A is internally compensated and stable without external capacitors. However, a 0.1 µF ceramic capacitor on VOUT is recommended to reduce low-frequency noise; 1–10 µF bulk capacitance may improve transient response (Page 14, Input and Output Capacitors section).

How is the TEMP pin on the 85514012A used in practice?

The TEMP pin outputs 580 mV at 25°C with 1.96 mV/°C slope - measured directly from the bandgap core. It enables real-time die temperature estimation for thermal compensation or fault detection; no calibration is required beyond measuring the voltage (Page 15, Temperature Monitoring section).

Is the 85514012A pin-compatible with newer Analog Devices references like the ADR02?

Yes - the 85514012A (REF02 in SOIC-8) shares identical pinout with ADR02ARZ per datasheet comparison (ADR02 Datasheet Rev. F, Page 1). Both place VIN on Pin 2, GND on Pin 4, VOUT on Pin 6, and TRIM on Pin 5 - enabling drop-in replacement where extended temperature range is not required.