Analog Devices Inc. LH0070-0H#PBF

Overview

LH0070-0H#PBF from Linear Technology is a precision 10V buried Zener voltage reference IC operating in series or shunt mode, delivering ±0.03% initial accuracy, ≤5ppm/°C temperature drift (–25°C to 85°C), <6µV_P-P (0.1Hz–10Hz) output noise, and >100dB ripple rejection - used in high-resolution ADC/DAC calibration, inertial navigation systems, and portable metrology standards.

For engineers reviewing the LH0070-0H#PBF datasheet, LH0070-0H#PBF pinout, LH0070-0H#PBF application, or LH0070-0H#PBF equivalent, key selection criteria include ultralow thermal hysteresis (5ppm), dual-mode operation capability, trimmable ground pin interface, guaranteed minimum 11.4V input voltage, and TO-39 metal-can package suitability for low-noise analog signal chains.

Technical Context

The LH0070-0H#PBF implements a subsurface Zener diode structure eliminating surface-breakdown noise and long-term drift issues inherent in bandgap or surface Zener references. Its circuit architecture enables simultaneous sourcing and sinking up to 10mA in series mode while maintaining sub-0.6Ω output resistance and <0.03% load regulation (0–5mA).

Thermal regulation is minimized via low-power design (<1.7mA quiescent current) and optimized die layout, avoiding on-chip heaters. The ground pin serves as a trimming node - applying current through a 5Ω series resistor enables fine adjustment but introduces ≤2ppm/°C induced drift if not compensated.

Key Specifications

Pinout & Package

H Package: 3-lead TO-39 metal can (LH0070-0H#PBF), hermetically sealed, θ_JA = 150°C/W, θ_JC = 45°C/W, T_JMAX = 150°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LH0070-0H#PBF, LT1031BMH delivers measurably lower drift and noise in the same TO-39 package, while AD581KH trades significant performance for broader commercial availability and lower unit cost - making LH0070-0H#PBF the optimal balance of precision, dual-mode flexibility, and proven field reliability.

Availability

LH0070-0H#PBF is available at Aetrix Electronics and suitable for high-resolution data acquisition, inertial navigation systems, and portable calibration standards requiring stable component supply with traceable lot history and extended lifecycle support.

Supply support for LH0070-0H#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

Linear Technology Corporation (now part of Analog Devices) designs high-performance analog ICs focused on precision, power efficiency, and signal integrity.

The LH0070-0H#PBF belongs to Linear's precision voltage reference product line, engineered specifically for metrology, aerospace, and test equipment demanding ultralow drift, noise, and hysteresis in harsh thermal environments.

FAQ

What is the guaranteed temperature coefficient specification for LH0070-0H#PBF?

The LH0070-0H#PBF has a guaranteed output voltage temperature coefficient of ≤5ppm/°C over the –25°C to 85°C range. This is explicitly specified in the LH0070 Electrical Characteristics table and confirmed across multiple production lots. The full –55°C to 125°C range is rated at ≤7ppm/°C for the LH0070 family, but the -0H grade is characterized and binned to the tighter 5ppm/°C limit within its defined operating window.

Can LH0070-0H#PBF operate in shunt mode like a two-terminal Zener diode?

Yes, LH0070-0H#PBF supports true shunt-mode operation with the input pin left open. In this configuration, it regulates between OUTPUT and GROUND terminals, sinking 1.7–10mA while maintaining the same 10V precision and low drift as in series mode. The datasheet confirms shunt-mode minimum current (1.1mA) and current-limit behavior, and application circuits (e.g., AC08) demonstrate its use as a negative shunt reference driven by an LM334 current source.

What is the minimum input voltage required for LH0070-0H#PBF to maintain regulation?

The guaranteed minimum input voltage for LH0070-0H#PBF is 11.4V at 25°C, as stated in the LH0070 Electrical Characteristics table under "Input Voltage Range". This value increases slightly with load current - e.g., 11.6V is required at 5mA output - and decreases marginally at elevated temperatures. Operation below 11.4V results in loss of regulation, regardless of output loading or ambient conditions.

How does the ground pin function in LH0070-0H#PBF, and can it be used for trimming?

The ground pin of LH0070-0H#PBF serves as both the reference return path and a trim node. By injecting current into this pin via a 5Ω series resistor (as shown in TA04), the output voltage can be adjusted ±0.1%. However, ground pin current varies with temperature (up to 4µA/°C), so unshielded trim networks induce up to 2ppm/°C additional drift. Proper implementation requires low-TC resistors and thermal isolation to preserve the device's intrinsic 5ppm/°C performance.

Is LH0070-0H#PBF compatible with LT1031 and AD581 footprints?

LH0070-0H#PBF uses the same H-package (3-lead TO-39) as LT1031 variants and AD581KH, sharing identical mechanical dimensions, lead spacing (0.100"), and mounting hole pattern. Pin assignments (INPUT/OUTPUT/GROUND) match exactly, enabling direct physical replacement. Electrical compatibility is confirmed in the datasheet's "Pin Compatible with LH0070 and AD581*" statement and cross-reference guide, though LH0070-0H#PBF offers superior drift and noise versus AD581.