Analog Devices Inc. LT1034BIZ-1.2#TRPBF

Overview

LT1034BIZ-1.2#TRPBF from Analog Devices (formerly Linear Technology) is a micropower, precision dual-output voltage reference IC providing 1.225V ±0.015V and 7.0V ±0.2V outputs in a 3-lead TO-92 plastic package. It delivers guaranteed 10 ppm/°C max temperature coefficient (1.2V output), 20µA minimum operating current, 1Ω typical reverse dynamic impedance, and operates across –40°C to 85°C industrial temperature range. It serves as a high-stability upgrade for LM385/LT1004 in portable metering and precision regulator circuits.

For engineers reviewing the LT1034BIZ-1.2#TRPBF datasheet, LT1034BIZ-1.2#TRPBF pinout, LT1034BIZ-1.2#TRPBF application, or LT1034BIZ-1.2#TRPBF equivalent, this page provides verified specifications, package mapping, real-world use scenarios, and validated alternative options for industrial-grade analog signal conditioning and calibration systems.

Technical Context

The LT1034BIZ-1.2#TRPBF integrates two independent references: a trimmed thin-film bandgap cell for the 1.225V output (1% initial tolerance, 10 ppm/°C max drift) and a subsurface zener for the 7V output (±0.2V tolerance, 40 ppm/°C max drift). Both outputs share a common cathode terminal and operate with reverse bias current from 20µA to 20mA.

Its low 1Ω dynamic impedance enables stable regulation from unregulated supplies, while its 4 µV_P-P (0.1Hz–10Hz) low-frequency noise and 20 ppm/√khrs long-term stability support metrology-grade accuracy. The device requires no external components and maintains performance over full industrial temperature range without trimming.

Key Specifications

Pinout & Package

LT1034BIZ-1.2#TRPBF uses the Z package: 3-lead TO-92 plastic case with standard lead configuration (pin 1 = 1.2V/2.5V output, pin 2 = cathode/common, pin 3 = 7V output). Leads are tin-lead solder-dipped per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LT1034BIZ-1.2#TRPBF, LT1019CS8-1.2 offers smaller footprint but sacrifices 7V output and industrial temp range, while REF5012IDR delivers lower drift and noise but requires higher supply current and lacks dual-reference integration - making LT1034BIZ-1.2#TRPBF optimal for cost-sensitive, battery-powered dual-rail systems needing proven long-term stability.

Availability

LT1034BIZ-1.2#TRPBF is available at Aetrix Electronics and suitable for portable meters, precision regulators, and field calibration equipment requiring stable component supply with guaranteed industrial temperature performance and long-term traceability.

Supply support for LT1034BIZ-1.2#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 full product support, documentation, and manufacturing continuity for legacy Linear references.

The LT1034 series was designed specifically for high-accuracy, low-power analog systems where dual reference rails and long-term stability outweigh raw speed or ultra-low noise - targeting portable test equipment and industrial sensor interfaces.

FAQ

What is the operating temperature range for LT1034BIZ-1.2#TRPBF?

The LT1034BIZ-1.2#TRPBF is rated for industrial temperature operation from –40°C to +85°C. This range is guaranteed by the 'I' grade suffix in the part number and confirmed in the Absolute Maximum Ratings table. All key electrical parameters-including 10 ppm/°C max temperature coefficient and 20 ppm/√khrs long-term stability-are specified across this full range, making LT1034BIZ-1.2#TRPBF suitable for deployment in harsh environmental conditions without derating.

Can LT1034BIZ-1.2#TRPBF be used as a direct replacement for LT1004CS8-1.2?

No, LT1034BIZ-1.2#TRPBF is not a direct replacement for LT1004CS8-1.2 due to fundamental differences: LT1034BIZ-1.2#TRPBF is a 3-lead TO-92 dual-output device (1.2V + 7V), while LT1004CS8-1.2 is an 8-lead SO-8 single-output 1.2V reference. Pin count, package type, and auxiliary output capability differ. However, LT1034BIZ-1.2#TRPBF can functionally replace LT1004CS8-1.2 in the 1.2V reference role if the 7V output is unused and the TO-92 footprint is accommodated.

What is the minimum current required for stable operation of LT1034BIZ-1.2#TRPBF?

The LT1034BIZ-1.2#TRPBF requires a minimum reverse current of 20µA through its 1.2V output terminal (Pin 1) to maintain specified accuracy and temperature coefficient. This value is explicitly guaranteed in the Electrical Characteristics table under "Minimum Operating Current" for the LT1034B grade. Below 20µA, output voltage may deviate beyond the 1.225V ±0.015V specification and temperature drift may exceed 10 ppm/°C.

Does LT1034BIZ-1.2#TRPBF require external capacitors for stability?

No, LT1034BIZ-1.2#TRPBF does not require external capacitors for stability. Its low 1Ω dynamic impedance and internal design ensure regulation remains stable under load transients up to 20mA without added capacitance. The datasheet confirms stable operation with purely resistive loads and highlights that external capacitors are unnecessary unless specific EMI filtering or ultra-low-noise post-filtering is needed - a design choice, not a stability requirement for LT1034BIZ-1.2#TRPBF.

How is the 7V output of LT1034BIZ-1.2#TRPBF characterized?

The 7V output of LT1034BIZ-1.2#TRPBF is a subsurface zener reference with guaranteed reverse breakdown voltage of 6.80V to 7.30V at 100µA, ±0.2V tolerance, and 40 ppm/°C max temperature coefficient. Unlike the 1.2V bandgap output, it is optimized for less demanding applications-such as comparator hysteresis or auxiliary supply bias-where absolute precision is secondary to voltage level and robustness. Its dynamic impedance is higher than the 1.2V output but still ≤2.5Ω.