Analog Devices Inc. LTC6078CDD#PBF

Overview

LTC6078CDD#PBF from Analog Devices (formerly Linear Technology) is a dual micropower precision CMOS operational amplifier with rail-to-rail input/output swing, 25µV max offset voltage at 25°C, 0.7µV/°C max offset drift, and 54µA per amplifier supply current at 3V - designed for high-impedance sensor signal conditioning in battery-powered portable instruments.

For engineers reviewing the LTC6078CDD#PBF datasheet, LTC6078CDD#PBF pinout, LTC6078CDD#PBF application, or LTC6078CDD#PBF equivalent, key selection criteria include ultra-low input bias current (≤50pA ≤85°C), 95dB min CMRR, 100dB min PSRR, 16nV/√Hz input noise density at 1kHz, and operation from 2.7V to 5.5V across –40°C to 85°C.

Technical Context

The LTC6078CDD#PBF employs complementary PMOS/NMOS input stages enabling true rail-to-rail common-mode input range (V– to V+), with seamless transition between input pairs near 0.9V–1.3V below V+. Its micropower architecture maintains precision performance while drawing only 54µA per amplifier, making it suitable for continuous-sensing applications where quiescent power must be minimized without sacrificing DC accuracy.

Integrated shutdown pins (SHDN_A and SHDN_B, active-low) enable independent control of each amplifier's output impedance and supply current - reducing per-amplifier current to ≤1µA in shutdown. The 10-lead DFN package features an exposed pad tied to V–, supporting thermal management in space-constrained layouts while maintaining low thermal hysteresis (typical 1µV after three –45°C to 90°C cycles).

Key Specifications

Pinout & Package

Package: 10-lead (3mm × 3mm) plastic DFN with exposed pad connected to V–. Thermal resistance θ_JA = 43°C/W; max junction temperature = 125°C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision op amp applications.

Compared with LTC2051CDD#PBF and OPA333AIDR, the LTC6078CDD#PBF uniquely balances micropower operation (54µA), shutdown flexibility, and 25µV offset - making it optimal for multi-sensor nodes requiring selective channel activation and >1-year coin-cell operation.

Availability

LTC6078CDD#PBF is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered sensor nodes, and precision analog front-ends requiring stable component supply with guaranteed long-term availability.

Supply support for LTC6078CDD#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 with rigorous qualification and long-term product commitments.

The LTC6078CDD#PBF belongs to Linear's micropower precision op amp family, engineered for high-impedance, low-power signal conditioning in portable and remote measurement systems where DC accuracy and energy efficiency are co-critical.

FAQ

What is the maximum operating temperature range for the LTC6078CDD#PBF?

The LTC6078CDD#PBF is specified for operation from –40°C to 85°C, with guaranteed performance over this full range. Its absolute maximum junction temperature is 125°C, consistent with the 10-lead DFN package's thermal rating. The 'C' grade suffix confirms commercial-temperature qualification, and all electrical parameters in the datasheet apply across –40°C to 85°C unless otherwise noted.

Does the LTC6078CDD#PBF support rail-to-rail input and output simultaneously?

Yes, the LTC6078CDD#PBF supports true rail-to-rail input (V– to V+) and rail-to-rail output (V– to V+) simultaneously. Its complementary PMOS/NMOS input stage eliminates dead zones, and the output stage delivers full swing into ≥10kΩ loads. This capability is validated across the entire 2.7V–5.5V supply range and –40°C to 85°C temperature range, enabling single-supply designs without level-shifting circuitry.

How does the shutdown functionality work on the LTC6078CDD#PBF?

The LTC6078CDD#PBF features two independent active-low shutdown pins: SHDN_A (Pin 9) and SHDN_B (Pin 5). When pulled ≤0.8V, each pin places its respective amplifier into high-impedance output state and reduces supply current to ≤1µA per channel. Internal pull-up current sources tie both pins to V+ when floating, ensuring normal operation by default. Turn-on time is 50µs; turn-off time is 2µs.

Can the LTC6078CDD#PBF drive capacitive loads, and what is the limit?

Yes, the LTC6078CDD#PBF can drive capacitive loads up to 200pF in unity-gain configuration while maintaining stability. Driving larger loads is possible with added series resistance (e.g., 10–100Ω) between the output and load, which isolates the amplifier from reactive feedback. Performance data confirms stable transient response and <5% overshoot up to 200pF, as verified in Figure G20 of the datasheet.

What layout considerations are critical for achieving specified 25µV offset performance with the LTC6078CDD#PBF?

To achieve the specified 25µV offset performance, avoid thermal gradients across the LTC6078CDD#PBF package by keeping input traces short, symmetric, and away from heat sources. Use a guard ring driven at common-mode potential around +IN and –IN traces to suppress PCB leakage currents. Mount the DFN package near a board edge or corner to minimize mechanical stress-induced V_OS shift, and ensure the exposed pad is solidly soldered to a thermal ground plane.