Analog Devices Inc. LT1630CN8#PBF

Overview

LT1630CN8#PBF from Analog Devices (formerly Linear Technology) is a dual rail-to-rail input and output precision operational amplifier with 30MHz gain-bandwidth product, 10V/µs slew rate, and 3.5mA supply current per amplifier. It operates from 2.7V single supply to ±15V dual supply, delivers ±35mA output drive, and achieves 525µV max input offset voltage - enabling high-fidelity signal conditioning in low-voltage data acquisition systems.

For engineers reviewing the LT1630CN8#PBF datasheet, LT1630CN8#PBF pinout, LT1630CN8#PBF application, or LT1630CN8#PBF equivalent, key selection criteria include rail-to-rail I/O swing at 3V operation, CMRR of 106dB over full input range, open-loop gain ≥1000 V/mV into 10kΩ, and guaranteed performance across –40°C to 85°C.

Technical Context

The LT1630CN8#PBF employs a patented dual-input-stage architecture: a PNP pair active from V– to ~1.4V below V+, and an NPN pair active near V+, enabling true rail-to-rail common-mode input range. Its output stage uses complementary emitter-follower topology to achieve rail-to-rail swing with >35mA sink/source capability.

It features matched input stages trimmed at both supply rails for high CMRR (106dB typ), low 6nV/√Hz input noise, and –91dBc distortion at 100kHz - optimized for driving SAR ADCs and precision active filters without external level-shifting circuitry.

Key Specifications

Pinout & Package

LT1630CN8#PBF is housed in an 8-pin PDIP package (N8), through-hole compatible with legacy prototyping and industrial control PCBs. Thermal resistance θ_JA = 130°C/W enables operation at full load without forced air cooling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LT1630CS8#PBF, LT1630CN8#PBF offers superior thermal performance in high-power-density layouts, while AD8628ARZ trades 12× higher precision for 12× lower bandwidth - making LT1630CN8#PBF the balanced choice for mixed-signal systems demanding both speed and DC accuracy.

Availability

LT1630CN8#PBF is available at Aetrix Electronics and suitable for active filter design, rail-to-rail buffering, ADC driver circuits, and battery-powered signal chains requiring stable component supply across extended temperature ranges.

Supply support for LT1630CN8#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 automotive and industrial qualification standards.

The LT1630 series belongs to Linear Technology's precision rail-to-rail op amp product line, designed specifically for high-speed, high-accuracy signal conditioning in data acquisition, sensor interface, and mixed-signal systems where both bandwidth and DC precision are critical.

FAQ

What is the maximum operating temperature range for LT1630CN8#PBF?

The LT1630CN8#PBF is rated for operation from –40°C to +85°C. This C-grade temperature specification is guaranteed by testing and applies across all electrical parameters in the datasheet, including input offset voltage, CMRR, and gain-bandwidth product. The device uses the N8 (8-lead PDIP) package with θ_JA = 130°C/W, supporting reliable operation at full load within this range without derating.

Does LT1630CN8#PBF support single-supply operation at 3.0V?

Yes, LT1630CN8#PBF fully supports single-supply operation at 3.0V. Its minimum supply voltage is specified at 2.7V, and all key parameters - including rail-to-rail input/output swing, 30MHz gain-bandwidth product, and 10V/µs slew rate - are characterized at 3V. Input common mode extends from V– (0V) to V+ (3V), and output swings to within 15mV of each rail under light load, enabling direct interfacing with 3.3V logic and ADCs.

What is the typical input bias current of LT1630CN8#PBF at 25°C?

The typical input bias current of LT1630CN8#PBF at 25°C is 0nA at V_CM = V+ and –1000nA at V_CM = V–, with a maximum of ±1000nA across the full common-mode range. This bipolar input stage behavior arises from its dual PNP/NPN architecture: the PNP pair dominates near V–, yielding near-zero bias current, while the NPN pair activates near V+, contributing higher but still well-controlled bias current - critical for high-impedance sensor applications.

Can LT1630CN8#PBF drive a 100Ω load?

Yes, LT1630CN8#PBF can drive a 100Ω load. Its output delivers ±35mA minimum short-circuit current and sustains ±25mA into 25Ω loads at 5V supply. At 3V supply, it sources/sinks ≥20mA - sufficient for 100Ω loads (±2V swing). However, thermal considerations apply: with 100Ω load and 3V supply, power dissipation reaches ~40mW per amplifier, remaining within safe limits for the N8 package at ambient temperatures ≤85°C.

Is LT1630CN8#PBF pin-compatible with standard dual op amp footprints?

Yes, LT1630CN8#PBF uses the industry-standard 8-pin PDIP dual op amp pinout (SO-8 compatible): Pin 1 = OUT A, Pin 2 = –IN A, Pin 3 = +IN A, Pin 4 = V–, Pin 5 = V+, Pin 6 = OUT B, Pin 7 = –IN B, Pin 8 = +IN B. This allows direct replacement of legacy dual op amps like LM358 or TL072 in existing through-hole designs without PCB modification, while delivering rail-to-rail I/O and higher speed.