Analog Devices Inc. LT1396CDD#PBF

Overview

LT1396CDD#PBF from Analog Devices (formerly Linear Technology) is a dual-channel, 400MHz current feedback amplifier in an 8-lead 3mm × 3mm DFN package, delivering 800V/μs slew rate, ±80mA output current, and 4.6mA per amplifier supply current at ±5V - optimized for high-speed video loop-through, RGB buffering, and IF signal conditioning in compact portable and broadcast equipment.

For engineers reviewing the LT1396CDD#PBF datasheet, LT1396CDD#PBF pinout, LT1396CDD#PBF application, or LT1396CDD#PBF equivalent, key selection criteria include its dual-channel current feedback architecture, ±2V to ±6V supply flexibility, 100MHz 0.1dB gain flatness at AV = 1/2/–1, thermal performance in the DD package (θJA = 160°C/W), and compatibility with standard SO-8 and MSOP pinouts for layout reuse.

Technical Context

The LT1396CDD#PBF implements a current feedback topology with separate high-impedance noninverting input and low-impedance inverting input, enabling bandwidth independence from closed-loop gain-400MHz at AV = 1 and 350MHz at AV = 2 or –1. Its transimpedance gain stage drives 150Ω loads with ±3.4V swing while maintaining <10% overshoot and 1.3ns rise time.

Designed on Linear's proprietary complementary bipolar process, it features matched input bias currents (±50μA typ), 4.5nV/√Hz input voltage noise, and robust 70dB PSRR at 100kHz. The DD package's exposed V– pad (optional PCB connection) supports thermal management under continuous 80mA output loading.

Key Specifications

Pinout & Package

LT1396CDD#PBF uses an 8-lead plastic DFN package (3mm × 3mm × 0.75mm) with exposed metal pad connected to V–; thermal resistance θJA = 160°C/W with minimal PCB copper, reducible with expanded ground plane.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel high-speed amplifier applications.

Compared with LMH6702MA/NOPB and ADA4817-2ACPZ-R7, the LT1396CDD#PBF uniquely combines dual-channel integration, 400MHz current-feedback bandwidth, ±80mA drive, and 3mm × 3mm DFN packaging - making it the only option that satisfies simultaneous requirements for compact HD video buffering, low-power operation, and coaxial cable drive without external components.

Availability

LT1396CDD#PBF is available at Aetrix Electronics and suitable for video loop-through amplifiers, RGB video buffering systems, and IF signal conditioning circuits requiring stable component supply across industrial temperature validation cycles and long-lifecycle production programs.

Supply support for LT1396CDD#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.

The LT1396CDD#PBF belongs to Linear Technology's high-speed current feedback amplifier product line, designed specifically for demanding video, communications, and instrumentation applications where bandwidth, slew rate, and drive capability outweigh DC precision requirements.

FAQ

What is the maximum capacitive load the LT1396CDD#PBF can drive stably?

The LT1396CDD#PBF can drive up to 1000pF with proper feedback resistor selection: at AV = 2 and RF = RG = 255Ω, stability is maintained up to 1000pF; beyond that, a 5Ω–35Ω series output resistor is recommended to isolate the load. This behavior is confirmed in Figure 13 of the LT1395/LT1396/LT1397 datasheet, where peaking remains ≤5dB across the tested range. The LT1396CDD#PBF's current feedback architecture makes it inherently more tolerant of capacitive loading than voltage feedback alternatives.

Does the LT1396CDD#PBF support single-supply operation?

Yes, the LT1396CDD#PBF operates from a single 4V supply (V+ = 4V, V– = 0V) up to ±6V (12V total). At 4V single supply, it delivers ±3.2V output swing into 150Ω with 400MHz bandwidth preserved at AV = 1. Input common-mode range extends to within 1V of either rail, allowing direct interface with 3.3V logic-driven video sources. The LT1396CDD#PBF does not require level-shifting circuitry in most single-supply video applications.

How does the LT1396CDD#PBF's current feedback architecture affect gain-setting resistor selection?

Unlike voltage feedback op amps, the LT1396CDD#PBF's bandwidth depends directly on the feedback resistor value: for AV = 1, RF = 374Ω yields 400MHz; for AV = 2, RF = RG = 255Ω yields 350MHz. The datasheet's Typical AC Performance table provides exact resistor values per gain configuration. Using incorrect RF values causes bandwidth reduction or peaking - the LT1396CDD#PBF cannot be used with arbitrary gain-setting networks without verifying stability via the provided guidelines.

Is the exposed pad on the LT1396CDD#PBF's DFN package electrically connected?

Yes, the underside metal pad of the LT1396CDD#PBF's DD package is internally connected to the V– pin (Pin 4) and must be soldered to a PCB thermal pad tied to the system ground plane. This connection is mandatory for achieving the specified θJA = 160°C/W; omitting it degrades thermal performance by >40°C/W. The pad is not isolated - connecting it to any potential other than V– will cause malfunction or damage.

What is the differential input voltage limit for the LT1396CDD#PBF?

The absolute maximum differential input voltage for the LT1396CDD#PBF is ±5V, as specified in the Absolute Maximum Ratings table. Exceeding this risks junction breakdown in the input transistors. In normal operation with AV = 1 or 2, the differential voltage across +IN/–IN remains <100mV, so the limit is rarely approached - however, during power-up sequencing or fault conditions (e.g., open feedback), the LT1396CDD#PBF's internal clamping diodes may conduct if the limit is breached.