Analog Devices Inc. LT1633IS#PBF

Overview

LT1633IS#PBF from Analog Devices (formerly Linear Technology) is a quad rail-to-rail input and output precision operational amplifier optimized for high-speed, low-voltage signal conditioning. It delivers 45MHz gain-bandwidth, 45V/µs slew rate, 4.3mA supply current per amplifier, ±15V or 2.7V–36V wide supply range, and rail-to-rail output swing capable of sourcing/sinking ≥35mA - enabling use in battery-powered instrumentation amplifiers and A/D driver stages.

For engineers reviewing the LT1633IS#PBF datasheet, LT1633IS#PBF pinout, LT1633IS#PBF application, or LT1633IS#PBF equivalent, this page provides verified DC precision specs (1350µV max V_OS, 800V/mV min A_VOL), thermal derating guidance, capacitive load stability limits (≤200pF at ±15V), and confirmed SO-14 package compatibility with standard quad op amp footprint.

Technical Context

The LT1633IS#PBF employs dual complementary bipolar input stages (PNP + NPN) that auto-switch across the full rail-to-rail common-mode range, eliminating phase reversal and ensuring consistent offset behavior. Its output stage uses complementary common-emitter transistors with local feedback capacitors to maintain rail-to-rail swing while delivering ≥35mA drive into resistive loads.

It operates over –40°C to 85°C with guaranteed performance at ±15V, 5V, and 3V supplies. Input bias current polarity reverses with common-mode voltage (±2.2µA max), and internal 225Ω series resistors plus back-to-back diodes provide ±1.4V differential input protection and 3kV HBM ESD robustness.

Key Specifications

Pinout & Package

LT1633IS#PBF is housed in a 14-pin plastic SO (SO-14) package with standard quad op amp pinout and 1.27mm pitch. Thermal resistance θ_JA = 150°C/W enables operation up to 85°C ambient under typical load conditions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OP4177ARUZ and TLV2464CDR, the LT1633IS#PBF uniquely balances high speed (45MHz/45V/µs), rail-to-rail I/O, wide supply (2.7V–±15V), and 35mA drive - making it the only option among the three capable of driving 10-bit+ ADCs at >100kHz while operating from 3V or ±15V rails.

Availability

LT1633IS#PBF is available at Aetrix Electronics and suitable for active filters, rail-to-rail buffer amplifiers, A/D converter drivers, and battery-powered systems requiring stable component supply across industrial temperature ranges.

Supply support for LT1633IS#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 semiconductors, formed through the acquisition of Linear Technology in 2017.

The LT1633IS#PBF belongs to Linear's precision high-speed op amp product line, designed specifically for demanding signal chain applications where rail-to-rail operation, low noise, and wide supply flexibility are critical - including portable instrumentation, industrial process control, and medical diagnostics.

FAQ

What is the maximum capacitive load the LT1633IS#PBF can drive stably?

The LT1633IS#PBF can drive up to 200pF capacitive load stably in unity-gain configuration when operated on ±15V supplies. At 3V single supply, the limit reduces to 100pF. For loads exceeding these values, a 20Ω–50Ω isolation resistor must be placed between the output and the capacitor, with feedback taken directly from the op amp output pin - as confirmed in the Applications Information section of the official datasheet for LT1633IS#PBF.

Does the LT1633IS#PBF support true rail-to-rail input common-mode voltage?

Yes, the LT1633IS#PBF supports rail-to-rail input common-mode voltage - its input stage combines PNP and NPN differential pairs that auto-switch across the full range from V– to V+. This architecture ensures continuous operation without phase reversal or discontinuity, with input offset voltage shift limited to 1500µV max over the entire range - a key specification verified in the Electrical Characteristics table for LT1633IS#PBF at –40°C to 85°C.

What is the guaranteed minimum open-loop gain for LT1633IS#PBF?

The guaranteed minimum large-signal voltage gain (A_VOL) for LT1633IS#PBF is 800V/mV (i.e., 1,600,000 V/V) when tested at ±15V supplies, V_OUT = ±14.5V, and R_L = 10kΩ - as specified in the –40°C to 85°C electrical characteristics table. This high open-loop gain ensures <0.001% gain error in precision closed-loop configurations using LT1633IS#PBF.

Can LT1633IS#PBF operate from a 3V single supply?

Yes, LT1633IS#PBF is fully specified for 3V single-supply operation (V+ = 3V, V– = 0V), with guaranteed parameters including 40MHz gain-bandwidth, 22V/µs slew rate, 4.95mA supply current per amplifier, and rail-to-rail output swing within 40mV of each rail. The minimum supply voltage is 2.7V, validated by V_OS change <250µV from 3V to 2.7V - all confirmed in the –40°C to 85°C characterization tables for LT1633IS#PBF.

What protection features are built into LT1633IS#PBF?

LT1633IS#PBF integrates multiple protection features: (1) Cross-coupled input diodes prevent phase reversal during overdrive (>700mV beyond rails); (2) Back-to-back input diodes limit differential input voltage to ±1.4V; (3) Internal 225Ω series resistors restrict input current to safe levels; (4) Output clamp diodes protect against reverse bias; and (5) 3kV HBM ESD rating on all pins - all documented in the Applications Information section of the LT1633IS#PBF datasheet.