Analog Devices Inc. LT1034IZ-2.5#TRPBF

Overview

LT1034IZ-2.5#TRPBF from Analog Devices (formerly Linear Technology) is a micropower dual-output precision voltage reference delivering 2.5V ±0.4% and 7V ±3% outputs in a TO-92 plastic package, operating from 20µA to 20mA with 20ppm/°C max temperature drift and 1.5Ω max dynamic impedance. It serves as a high-stability upgrade for LM385/LT1004 in portable meters and precision regulators.

For engineers reviewing the LT1034IZ-2.5#TRPBF datasheet, LT1034IZ-2.5#TRPBF pinout, LT1034IZ-2.5#TRPBF application, or LT1034IZ-2.5#TRPBF equivalent, key selection criteria include guaranteed 20ppm/°C drift over –40°C to 85°C, low-noise 2.5V output (6µV_P-P, 0.1–10Hz), reverse dynamic impedance ≤1.5Ω at 100µA, and dual-reference architecture enabling ratiometric sensing and auxiliary biasing.

Technical Context

The LT1034IZ-2.5#TRPBF integrates two independent references: a trimmed thin-film bandgap source for the 2.5V output (1.225V nominal, ±0.4% initial tolerance) and a subsurface zener for the 7V output (7.0V nominal, ±3% initial tolerance). Both operate in reverse-biased mode with separate cathodes and shared anode (pin 2).

Its architecture supports simultaneous use of both references without interaction under specified current limits (30µA–2mA for 2.5V; 100µA–20mA for 7V), and features low temperature cycling hysteresis and 20ppm/√khrs long-term stability - critical for calibration-grade instrumentation.

Key Specifications

Pinout & Package

LT1034IZ-2.5#TRPBF uses the Z package: 3-lead TO-92 plastic case with lead diameter 0.016"–0.024", body length 0.180"±0.005", and standard JEDEC TO-92 outline. Pin 1 = 2.5V Cathode, Pin 2 = Anode (common), Pin 3 = 7V Cathode.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output precision reference applications.

Compared with LT1004CZ-2.5 and LT1236ACS8-2.5, the LT1034IZ-2.5#TRPBF uniquely delivers guaranteed 20ppm/°C drift and integrated 7V reference in a through-hole TO-92 package - making it the only option satisfying dual-output, industrial-temperature, and micropower constraints simultaneously.

Availability

LT1034IZ-2.5#TRPBF is available at Aetrix Electronics and suitable for portable meters, precision regulators, calibrators, and medical sensor interfaces requiring stable component supply with full industrial temperature support (–40°C to +85°C) and long-term reliability.

Supply support for LT1034IZ-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 and maintains its precision analog portfolio, including voltage references, op amps, and power management ICs, with focus on high-reliability industrial and instrumentation markets.

The LT1034IZ-2.5#TRPBF belongs to Linear's legacy micropower precision reference family, designed specifically for battery-operated test equipment and calibration systems demanding low drift, low noise, and dual-reference functionality in compact through-hole packages.

FAQ

What is the operating temperature range for LT1034IZ-2.5#TRPBF?

The LT1034IZ-2.5#TRPBF is rated for industrial temperature operation from –40°C to +85°C. This range is guaranteed for all key specifications including 2.5V output voltage (±0.4%), temperature coefficient (≤20ppm/°C), and dynamic impedance (≤1.5Ω). The "I" grade designation explicitly confirms this extended range, distinguishing it from commercial-grade variants.

Does LT1034IZ-2.5#TRPBF require external capacitors for stability?

No, the LT1034IZ-2.5#TRPBF does not require external capacitors for stability. Its internal design provides inherent stability across its full operating current range (30µA–2mA for 2.5V, 100µA–20mA for 7V) and load conditions. However, a 0.1µF ceramic capacitor placed close to pin 1 (2.5V cathode) is recommended to reduce high-frequency noise in sensitive measurement applications.

Can both the 2.5V and 7V outputs of LT1034IZ-2.5#TRPBF be used simultaneously?

Yes, both outputs can be used simultaneously, provided their respective current limits are observed: 30µA–2mA for the 2.5V output and 100µA–20mA for the 7V output. The datasheet confirms no functional interaction between outputs when operated within these ranges, and the common anode (pin 2) simplifies grounding. Thermal coupling between outputs is minimal due to shared die construction but does not affect specification compliance.

What is the maximum reverse current rating for LT1034IZ-2.5#TRPBF?

The absolute maximum reverse current for the 2.5V output of LT1034IZ-2.5#TRPBF is 20mA, and for the 7V output it is also 20mA. Exceeding these values risks permanent degradation of reference accuracy or increased temperature coefficient. The device is optimized for micropower operation down to 30µA (2.5V) and 100µA (7V), so sustained operation above 5mA is not recommended for long-term stability.

Is LT1034IZ-2.5#TRPBF pin-compatible with LT1034CZ-2.5?

Yes, LT1034IZ-2.5#TRPBF is pin-compatible with LT1034CZ-2.5 - both use the same 3-lead TO-92 (Z) package with identical pinout (pin 1 = 2.5V cathode, pin 2 = anode, pin 3 = 7V cathode). The only difference is temperature grade: "I" denotes –40°C to +85°C operation, while "C" is 0°C to +70°C. Electrical specifications are otherwise identical, allowing direct substitution in industrial designs.