Analog Devices Inc. LT1469ACDF-2#TRPBF

Overview

LT1469ACDF-2#TRPBF from Analog Devices (formerly Linear Technology) is a dual, decompensated precision high-speed operational amplifier optimized for gain ≥ 2 (AV = –1), delivering 200 MHz gain bandwidth, 30 V/µs slew rate, and 16-bit DC accuracy. It serves as a high-fidelity current-to-voltage converter for 16-bit DACs and low-distortion buffer for high-resolution ADCs in data acquisition systems.

For engineers reviewing the LT1469ACDF-2#TRPBF datasheet, LT1469ACDF-2#TRPBF pinout, LT1469ACDF-2#TRPBF application, or LT1469ACDF-2#TRPBF equivalent, key selection criteria include guaranteed 125 µV max input offset voltage at ±15 V over 0°C to 70°C, 800 ns settling time to 150 µV (10 V step), and DFN package thermal performance with exposed ground pad.

Technical Context

The LT1469ACDF-2#TRPBF employs a decompensated architecture requiring minimum closed-loop gain of 2 for stability-enabling higher bandwidth and faster settling than unity-gain-stable counterparts. Its input stage features bias current cancellation tailored for inverting configurations, with ≤10 nA max inverting input bias current at ±15 V.

DC precision is maintained via laser-trimmed input offset voltage (≤125 µV) and low drift (≤3 µV/°C), while AC performance relies on low 5 nV/√Hz input voltage noise and 0.6 pA/√Hz input current noise-optimized for source impedances between 1 kΩ and 20 kΩ.

Key Specifications

Pinout & Package

LT1469ACDF-2#TRPBF is housed in a 12-lead (4 mm × 4 mm) plastic DFN package with exposed thermal pad (Pin 13) tied to V–. The package supports high-density PCB layouts and enhanced thermal dissipation (θ_JA = 37°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LT1469CS8-2#TRPBF, the LT1469ACDF-2#TRPBF offers superior thermal performance and smaller footprint; versus LT1468IS8#TRPBF, it provides dual-channel operation and higher speed at the cost of gain stability constraints.

Availability

LT1469ACDF-2#TRPBF is available at Aetrix Electronics and suitable for high-accuracy data acquisition systems, 16-bit DAC interface modules, and precision instrumentation requiring stable component supply across commercial temperature range.

Supply support for LT1469ACDF-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 its precision analog portfolio with rigorous characterization and long-term product support.

The LT1469 family was designed specifically for 16-bit mixed-signal systems demanding simultaneous high DC accuracy and wide bandwidth-targeting DAC I-to-V, ADC buffering, and precision active filtering.

FAQ

What is the minimum stable gain for LT1469ACDF-2#TRPBF?

The LT1469ACDF-2#TRPBF is decompensated for minimum closed-loop gain of 2 (AV ≥ 2), including inverting configurations where |AV| = 1 is interpreted as gain magnitude ≥ 2 per the feedback ratio definition. Operating below this gain risks instability and peaking; for unity-gain applications, use the LT1469 instead.

Does LT1469ACDF-2#TRPBF support ±5 V supplies?

Yes, LT1469ACDF-2#TRPBF is fully specified for ±5 V operation across all key parameters-including 125 µV max input offset voltage, 22 V/µs min slew rate, and 190 MHz min gain bandwidth product-enabling low-voltage, low-power precision signal conditioning.

How is the exposed pad on the DFN package of LT1469ACDF-2#TRPBF used?

The exposed pad (Pin 13) of LT1469ACDF-2#TRPBF must be soldered directly to the PCB ground plane. It serves as both thermal conduction path (reducing θ_JA to 37°C/W) and low-impedance ground reference-critical for minimizing noise and maintaining PSRR/CMRR performance.

Can LT1469ACDF-2#TRPBF drive heavy capacitive loads?

LT1469ACDF-2#TRPBF is not optimized for direct capacitive loading >100 pF. For DAC outputs with significant capacitance (e.g., LTC1597), use an RC isolation network (e.g., 6 kΩ + 20 pF) as shown in the datasheet to maintain stability and settling performance without external compensation.

What is the maximum input common-mode voltage range for LT1469ACDF-2#TRPBF?

At ±15 V supply, LT1469ACDF-2#TRPBF guarantees input common-mode range from –12.5 V to +12.5 V (relative to ground). Inputs may be driven to the negative rail and within 0.5 V of the positive rail without phase reversal-beyond which output polarity inverts.