Analog Devices Inc. LT1206CR#PBF

Overview

LT1206CR#PBF from Analog Devices (acquired Linear Technology) is a current-feedback operational amplifier optimized for high-current video and cable driving applications. It delivers 250mA minimum output drive, 60MHz small-signal bandwidth at AV = 2 with 100Ω load, 900V/µs slew rate, 0.02% differential gain, and 0.17° differential phase - enabling robust RGB, composite video, and multi-cable distribution in broadcast and test equipment.

For engineers reviewing the LT1206CR#PBF datasheet, LT1206CR#PBF pinout, LT1206CR#PBF application, or LT1206CR#PBF equivalent, key selection criteria include capacitive-load stability up to 10,000pF, shutdown-mode supply current <200µA, adjustable quiescent current via external resistor, ±5V to ±15V dual-supply operation, and 7-lead DD package thermal resistance of 35°C/W with 125 sq.mm copper.

Technical Context

The LT1206CR#PBF employs a proprietary complementary bipolar process to achieve high-speed current-feedback architecture, where transresistance gain (ROL ≥100kΩ) and low input bias current asymmetry enable wideband stability with reactive loads. Its internal shutdown control references the positive supply, allowing logic-level interfacing via open-drain drivers without level-shifting.

Unlike voltage-feedback op amps, its slew rate varies with gain configuration and feedback resistor value - reaching 900V/µs at AV = 2 with RL = 50Ω and RF = RG = 1.5kΩ - while maintaining 0.1dB flatness up to 22.4MHz under IS = 10mA operation. Compensation is optional via the COMP pin, preserving bandwidth with resistive loads while eliminating peaking with capacitive loads up to 10nF.

Key Specifications

Pinout & Package

The LT1206CR#PBF is housed in a 7-lead plastic DD (R package) with exposed thermal tab connected to V+. This surface-mount package provides θJA = 35°C/W with 125 sq.mm topside copper, enabling high-power video amplification without heatsinks in space-constrained layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current-feedback amplifier applications.

Compared with LT1206CS8#PBF and LT1226CS8#PBF, the LT1206CR#PBF uniquely combines 7-lead DD thermal efficiency, integrated shutdown, and broadcast-grade video linearity - making it irreplaceable in compact, high-power, multi-output analog signal distribution where thermal headroom and power sequencing matter.

Availability

LT1206CR#PBF is available at Aetrix Electronics and suitable for video distribution amplifiers, RGB display interfaces, test equipment output stages, and industrial data acquisition cable drivers requiring stable component supply across extended temperature ranges (–40°C to 85°C).

Supply support for LT1206CR#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 LT1206 product line was originally developed by Linear Technology (acquired by ADI in 2017) to address demanding video, cable-driving, and high-current buffer applications where traditional op amps fail due to bandwidth collapse or instability with capacitive loads.

FAQ

What is the maximum capacitive load the LT1206CR#PBF can drive stably?

The LT1206CR#PBF is explicitly characterized for stable operation with up to 10,000pF capacitive load when the optional compensation network is enabled via a 0.01µF capacitor between the COMP and OUT pins. Without compensation, stability degrades above ~100pF. This capability eliminates external isolation resistors in video line driving and ADC anti-aliasing filter applications, directly supporting the LT1206CR#PBF's role in high-fidelity signal distribution.

How does the shutdown feature of the LT1206CR#PBF work, and what is its leakage behavior?

The LT1206CR#PBF shutdown pin is referenced to the positive supply rail; pulling it to V+ places the device in high-impedance, low-current mode with supply current <200µA and output leakage <10µA. In shutdown, the output presents ~40pF capacitance. The LT1206CR#PBF supports fast switching (<1µs) using open-drain logic like the 74C904, and the internal bias circuit limits shutdown pin current to ~500µA - simplifying interface design without external current limiting.

Can the LT1206CR#PBF operate from a single supply, and what are the input/output voltage limitations?

Yes, the LT1206CR#PBF supports single-supply operation (e.g., +10V and GND), but its input common-mode range extends only to within ~2V of each rail, and output swing is limited to ~±11.5V with ±15V supplies. For single-supply use, level-shifting or AC-coupling is required to keep inputs within the valid CM range (e.g., VCM = +2.5V for +5V rail). The LT1206CR#PBF's ±5V to ±15V dual-supply flexibility makes it better suited for traditional analog video systems than single-rail applications.

What is the thermal performance difference between the LT1206CR#PBF (DD package) and LT1206CS8#PBF (SOIC)?

The LT1206CR#PBF in the 7-lead DD package achieves θJA = 35°C/W with 125 sq.mm topside copper, while the LT1206CS8#PBF in 8-lead SOIC has θJA = 60–83°C/W depending on PCB copper area. This 25–48°C/W advantage allows the LT1206CR#PBF to dissipate ~1.03W at 70°C ambient without exceeding 150°C junction temperature - whereas the SOIC version requires significantly more board area or forced air. The LT1206CR#PBF's exposed V+ tab is central to its superior thermal design.

How does feedback resistor selection affect bandwidth and slew rate in the LT1206CR#PBF?

Feedback resistor value directly sets both small-signal bandwidth and slew rate in the LT1206CR#PBF: lower RF increases bandwidth but also raises slew rate (e.g., 900V/µs at RF = 1.5kΩ, AV = 2), while higher RF reduces both. The LT1206CR#PBF's Typical AC Performance tables specify optimal RF values per gain/load condition to maximize 0.1dB flatness. Unlike voltage-feedback op amps, changing RF alters the LT1206CR#PBF's dynamic response - requiring empirical validation for critical video or pulse applications.