Analog Devices Inc. LTC1047CN8#PBF

Overview

LTC1047CN8#PBF from Analog Devices (formerly Linear Technology) is a micropower, dual zero-drift operational amplifier in an 8-pin PDIP package, delivering ±3 µV typical input offset voltage, ±50 nV/°C max drift, and 110 dB minimum CMRR. It operates from a single 4.75 V to 16 V supply, features rail-to-rail output swing to GND, and targets precision DC signal conditioning in battery-powered instrumentation and thermocouple amplifiers.

For engineers reviewing the LTC1047CN8#PBF datasheet, LTC1047CN8#PBF pinout, LTC1047CN8#PBF application, or LTC1047CN8#PBF equivalent, key selection criteria include micropower consumption (80 µA per amplifier), chopper-stabilized DC accuracy without external capacitors, single-supply compatibility down to 4.75 V, and guaranteed operation from 0°C to 70°C in the N8 package.

Technical Context

The LTC1047CN8#PBF implements an integrated chopper-stabilized architecture with on-chip sampling capacitors, eliminating external hold capacitors required by conventional chopper amplifiers. Its internal 680 Hz sampling frequency enables continuous auto-zeroing while maintaining low 10 nV/°C typical drift and 3.5 µV_P-P (0.1–10 Hz) input-referred noise.

It supports true single-supply operation with common-mode input range extending to V– and output swing within millivolts of GND. The device achieves 200 kHz gain-bandwidth product and 0.2 V/µs slew rate while sustaining 150 dB typical open-loop gain and 105 dB minimum PSRR across its operating voltage range.

Key Specifications

Pinout & Package

The LTC1047CN8#PBF is housed in an 8-lead plastic DIP (N8) package with 0.300-inch body width, JEDEC MS-001 compliant footprint, and 130°C/W junction-to-ambient thermal resistance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual zero-drift operational amplifier applications.

Compared with AD8628ARZ and OPA2189IDR, the LTC1047CN8#PBF uniquely combines PDIP-compatible pinout, integrated chopper capacitors, and sub-100 µA supply current - making it optimal for legacy-compatible, ultra-low-power, DC-precision upgrades where board rework is prohibited.

Availability

LTC1047CN8#PBF is available at Aetrix Electronics and suitable for thermocouple amplifiers, electronic scales, and battery-powered instrumentation requiring stable component supply, long-lifecycle availability, and drop-in replacement capability for legacy dual op amp designs.

Supply support for LTC1047CN8#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 its precision analog portfolio, including chopper-stabilized amplifiers renowned for low offset and drift performance in demanding measurement systems.

The LTC1047CN8#PBF belongs to Linear's micropower zero-drift op amp family, engineered specifically for DC-critical applications such as sensor signal conditioning, precision instrumentation, and portable test equipment where traditional op amps fail due to drift and noise.

FAQ

What is the maximum operating temperature range for the LTC1047CN8#PBF?

The LTC1047CN8#PBF is rated for operation from 0°C to 70°C ambient temperature, with storage range extending from –65°C to 150°C. Its N8 PDIP package has a maximum junction temperature of 110°C and thermal resistance θ_JA = 130°C/W. This range suits commercial and industrial indoor applications but excludes extended-temperature variants like the CSW version.

Does the LTC1047CN8#PBF require external capacitors for chopper stabilization?

No, the LTC1047CN8#PBF integrates all sampling and hold capacitors on-die, eliminating the need for external capacitors typically required by other chopper amplifiers. This simplifies layout, reduces component count, and avoids performance degradation from capacitor tolerance, leakage, or PCB contamination - a key differentiator confirmed in the datasheet's "No External Components Required" feature.

Can the LTC1047CN8#PBF operate from a single 5 V supply?

Yes, the LTC1047CN8#PBF supports single-supply operation from as low as 4.75 V total supply (V+ to V–), making it fully compatible with standard 5 V logic rails. Its input common-mode range includes V– (GND), and its output swings to within millivolts of GND - enabling true single-supply configurations without level-shifting circuitry in the LTC1047CN8#PBF signal path.

What is the overload recovery time specification for the LTC1047CN8#PBF?

The LTC1047CN8#PBF has a typical overload recovery time of 70 ms from saturation, which is four times faster than chopper amplifiers requiring external capacitors. This parameter is measured under standard conditions (±5 V supplies, unity-gain configuration) and reflects the internal auto-zeroing loop's ability to restore DC accuracy after large transient overloads - critical in sensor front ends exposed to ESD or wiring faults.

Is the LTC1047CN8#PBF pin-compatible with standard dual op amp packages?

Yes, the LTC1047CN8#PBF uses the industry-standard 8-pin PDIP (N8) footprint and is explicitly documented as pin-compatible with common dual op amps such as the LM358 and OP297. Pin assignments match conventional dual op amp conventions: pins 1/7 are outputs, 2/6 are inverting inputs, 3/5 are non-inverting inputs, and 4/8 are supply rails - enabling direct replacement without PCB modification.