Analog Devices Inc. LT1167ACS8-1#PBF

Overview

LT1167ACS8-1#PBF from Analog Devices (formerly Linear Technology) is a precision instrumentation amplifier requiring only one external resistor to set gains from 1 to 10,000. It delivers 7.5 nV/√Hz input voltage noise at 1 kHz, 0.3 μV/°C max input offset drift, and 90 dB CMRR at G = 1 - optimized for bridge-based sensor signal conditioning in industrial pressure and strain measurement systems.

For engineers reviewing the LT1167ACS8-1#PBF datasheet, LT1167ACS8-1#PBF pinout, LT1167ACS8-1#PBF application, or LT1167ACS8-1#PBF equivalent, this page provides verified gain error (0.08% max at G = 10), ESD robustness (13 kV HBM), single-supply barometer interface capability, and SO-8 package thermal performance (θ_JA = 190°C/W).

Technical Context

The LT1167ACS8-1#PBF implements a three-op-amp topology with laser-trimmed 24.7 kΩ internal resistors and superbeta NPN input transistors, enabling picoampere bias current (350 pA max) and precise gain setting via RG = 49.4 kΩ/(G − 1). Its preamp transconductance scales with gain, preserving bandwidth-to-gain ratio better than conventional architectures.

Unlike the standard LT1167, the "-1" variant features improved input current behavior at high common-mode voltages - critical for high-impedance sensor interfaces where input bias current imbalance would otherwise degrade CMRR and offset stability across the full V_CM range (–V_S + 2.1 V to +V_S – 1.4 V).

Key Specifications

Pinout & Package

LT1167ACS8-1#PBF is housed in an 8-lead plastic SO (S8) package with JEDEC MS-012AC outline, 1.27 mm pitch, and exposed pad not connected internally. Thermal resistance θ_JA = 190°C/W enables operation up to +70°C ambient without forced airflow.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar instrumentation amplifier applications.

Compared with AD8421ARMZ and INA128UA, the LT1167ACS8-1#PBF uniquely combines single-resistor gain programming, 13 kV ESD robustness, and native REF pin architecture - making it optimal for cost-sensitive, high-reliability industrial sensor nodes where layout simplicity and field immunity are prioritized over raw speed or ultra-wide temperature range.

Availability

LT1167ACS8-1#PBF is available at Aetrix Electronics and suitable for industrial pressure transducers, structural strain monitoring systems, and medical biopotential acquisition requiring stable component supply across multi-year production cycles.

Supply support for LT1167ACS8-1#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 acquired Linear Technology in 2017 and maintains full product continuity, datasheet support, and long-term manufacturing commitment for the LT1167 family.

The LT1167 series was designed specifically for precision DC-coupled sensor signal conditioning - emphasizing low drift, high CMRR, and single-resistor configurability in harsh industrial and medical environments.

FAQ

What is the maximum gain achievable with LT1167ACS8-1#PBF and how is it set?

The LT1167ACS8-1#PBF supports gains from 1 to 10,000, set precisely using a single external resistor RG connected between pins 1 and 8. The relationship is G = 1 + 49.4 kΩ/RG; for G = 10,000, RG = 4.945 Ω. The LT1167ACS8-1#PBF's laser-trimmed internal resistors ensure 0.05% gain accuracy at G = 100 without trimming.

Does LT1167ACS8-1#PBF support true single-supply operation?

Yes - the LT1167ACS8-1#PBF operates from a single +5 V supply with REF pin tied to ground or a mid-rail voltage. Its input common-mode range extends to –V_S + 2.1 V, and output swings to within 1.3 V of rails. The front-page barometer application demonstrates validated single-supply use with 3.000 V full-scale output at 30.00 inches Hg.

How does the "-1" suffix differentiate LT1167ACS8-1#PBF from standard LT1167ACS8#PBF?

The "-1" variant improves input bias current symmetry at high common-mode voltages - critical when amplifying signals from high-impedance sources where mismatched bias currents degrade CMRR. This is explicitly documented in the Applications Information section and confirmed in the Electrical Characteristics tables for LT1167AC-1/LT1167AI-1 grades.

Can LT1167ACS8-1#PBF drive capacitive loads without oscillation?

Yes - the LT1167ACS8-1#PBF is internally compensated to drive capacitive loads up to 1000 pF in any gain configuration without external components. Typical overshoot remains below 20% even with 10,000 pF loads, as verified in Figure 1167 G25 of the datasheet.

What is the thermal performance of LT1167ACS8-1#PBF in SO-8 package?

The LT1167ACS8-1#PBF in SO-8 (S8) package has θ_JA = 190°C/W. At 1.3 mA supply current and ±15 V supplies, power dissipation is ~39 mW; junction temperature rise is ≤7.4°C above ambient - enabling reliable operation at +70°C ambient without heatsinking or airflow.