Analog Devices Inc. LT1469IN8#PBF

Overview

LT1469IN8#PBF from Analog Devices (formerly Linear Technology) is a dual precision high-speed operational amplifier optimized for 16-bit data acquisition systems. It delivers 90 MHz gain bandwidth, 22 V/µs slew rate, and 900 ns settling to 150 µV for 10 V steps - enabling high-fidelity DAC current-to-voltage conversion and ADC buffering in industrial instrumentation and medical imaging front-ends.

For engineers reviewing the LT1469IN8#PBF datasheet, LT1469IN8#PBF pinout, LT1469IN8#PBF application, or LT1469IN8#PBF equivalent, key selection criteria include guaranteed ±4.5 V minimum supply, –40°C to 85°C industrial temperature range, input offset voltage ≤500 µV over full temp range, and dual-channel matching performance critical for differential signal conditioning.

Technical Context

The LT1469IN8#PBF employs a single-stage architecture with bias current cancellation at the inverting input, specifically tailored for inverting configurations like DAC I-to-V converters. Its input stage uses back-to-back diodes and 100 Ω series resistors for ESD protection and overvoltage robustness up to ±10 mA.

It achieves unity-gain stability while maintaining 90 MHz GBW and low distortion (–96.5 dB THD at 100 kHz), enabled by optimized internal compensation and thermal layout. The device operates from ±5 V or ±15 V supplies and supports rail-to-rail output swing into 2 kΩ loads (±12.8 V min).

Key Specifications

Pinout & Package

LT1469IN8#PBF is housed in an 8-lead PDIP (Plastic Dual In-line Package) with 0.300-inch width, lead pitch of 0.100 inch, and through-hole mounting. Pin 1 is identified by a notch or dot; exposed pad is not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA211IDR and ADA4898-2ARMZ, the LT1469IN8#PBF uniquely balances 16-bit settling time, industrial temperature specification, and low-noise design - making it the only option among the three qualified for calibrated 16-bit DAC I-to-V conversion across –40°C to 85°C without external trimming.

Availability

LT1469IN8#PBF is available at Aetrix Electronics and suitable for high-accuracy data acquisition systems, industrial process controllers, and medical imaging signal chains requiring stable component supply with full industrial temperature grading.

Supply support for LT1469IN8#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.

The LT1469IN8#PBF belongs to ADI's legacy Linear Technology precision op amp portfolio, engineered specifically for applications demanding simultaneous high DC accuracy and high-speed settling - notably 16-bit DAC interfaces and metrology-grade ADC drivers.

FAQ

What is the maximum guaranteed input offset voltage for LT1469IN8#PBF over its full operating temperature range?

The LT1469IN8#PBF has a maximum input offset voltage of 500 µV over the full –40°C to 85°C industrial temperature range, as specified in the Electrical Characteristics table under "The l denotes the specifications which apply over the full operating temperature range, –40°C ≤ TA ≤ 85°C". This value applies to the N8 package variant and is measured at ±15 V and ±5 V supplies.

Does LT1469IN8#PBF support operation from ±5 V supplies, and what performance changes occur compared to ±15 V?

Yes, LT1469IN8#PBF is fully specified for ±5 V operation. At ±5 V, the slew rate drops to 17 V/µs (min), gain bandwidth reduces to 88 MHz (typ), and output swing decreases to ±2.8 V into 2 kΩ. Input offset voltage increases to 200 µV (max), and supply current lowers to 5 mA per amplifier - all values confirmed in the Electrical Characteristics tables across supply conditions.

Can LT1469IN8#PBF drive a 100 pF capacitive load in unity-gain configuration without oscillation?

Yes, the LT1469IN8#PBF is characterized to drive up to 100 pF in unity-gain configuration while maintaining stability, as stated in the Applications Information section. For loads exceeding this, a small series resistor (e.g., 10–50 Ω) should be added between output and load, along with a feedback capacitor as described in Figure 3 of the datasheet.

What is the purpose of the trimmed inverting input bias current in LT1469IN8#PBF, and how does it affect circuit design?

The trimmed inverting input bias current in LT1469IN8#PBF minimizes offset errors in inverting configurations such as DAC current-to-voltage converters. Because the noninverting input bias current is untrimmed and exhibits wider variation, balanced source resistances are explicitly discouraged - using equal resistors degrades DC accuracy and increases noise, per the Applications Information section.

Is LT1469IN8#PBF pin-compatible with other members of the LT1469 family, such as LT1469CS8#PBF or LT1469IDF#PBF?

No, LT1469IN8#PBF is not pin-compatible with LT1469CS8#PBF (8-lead SOIC) or LT1469IDF#PBF (12-lead DFN). While all share identical electrical functionality and pin functions, the N8 (PDIP), S8 (SOIC), and DF (DFN) packages have different pin counts and layouts - the DF package has 12 leads including N/C pins and an exposed pad, whereas N8 and S8 are 8-lead variants with identical pinout.