Analog Devices Inc. LT1206CT7#PBF

Overview

LT1206CT7#PBF from Analog Devices (formerly 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 LT1206CT7#PBF datasheet, LT1206CT7#PBF pinout, LT1206CT7#PBF application, or LT1206CT7#PBF equivalent, key selection considerations include its TO-220 package thermal performance (θJC = 5°C/W), shutdown-mode supply current (<200µA), capacitive-load stability up to 10,000pF with COMP pin network, ±5V to ±15V dual-supply operation, and adjustable quiescent current via external resistor on S/D pin.

Technical Context

The LT1206CT7#PBF employs a proprietary complementary bipolar process to achieve high-speed current-feedback architecture, where bandwidth and slew rate depend on feedback resistor value and supply voltage rather than open-loop gain. Its transresistance input stage enables fast large-signal response while maintaining low distortion across video frequencies.

Stability with heavy capacitive loads is achieved through an optional external compensation network between OUT and COMP pins - bypassing internal peaking mechanisms without sacrificing DC accuracy. The shutdown pin controls both bias current (down to <200µA) and active-mode quiescent current scaling via external resistor to ground.

Key Specifications

Pinout & Package

T7 Package: 7-Lead Plastic TO-220 with tab connected to V+; θJC = 5°C/W; intended for heatsink mounting.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LT1363CS8#PBF and AD817ARZ, the LT1206CT7#PBF uniquely combines high output current (250mA), integrated shutdown, and dedicated COMP pin for ultra-stable capacitive loading - making it irreplaceable in broadcast video and long-cable applications requiring both drive strength and thermal resilience.

Availability

LT1206CT7#PBF is available at Aetrix Electronics and suitable for RGB video distribution, broadcast cable driving, test equipment amplification, and medical imaging buffering requiring stable component supply across extended temperature ranges (–40°C to 85°C).

Supply support for LT1206CT7#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) designs high-performance analog, mixed-signal, and RF ICs for precision signal processing and power management.

The LT1206 product line was developed specifically for demanding analog video, broadcast, and high-current buffer applications where traditional voltage-feedback op amps fail due to bandwidth collapse and instability with capacitive loads.

FAQ

What is the maximum capacitive load the LT1206CT7#PBF can drive stably?

The LT1206CT7#PBF can drive up to 10,000pF stably when the optional compensation network is enabled - i.e., a 0.01µF capacitor is connected between the OUT and COMP pins. Without this network, stability degrades significantly above ~1000pF. This capability is explicitly verified in the datasheet's "Large-Signal Response, CL = 10,000pF" test circuit and Figure 6 waveform, confirming usable 60V/µs slew rate under that condition. The LT1206CT7#PBF's TO-220 package also provides low thermal resistance (5°C/W junction-to-case), supporting sustained current delivery into such loads.

How does the shutdown function work on the LT1206CT7#PBF?

The LT1206CT7#PBF shutdown pin (Pin 5, S/D) controls internal bias current: grounding it enables normal operation (~30mA supply current), while pulling it to V+ places the device in shutdown mode with supply current <200µA and output impedance ~40pF. The pin is referenced to V+, so open-drain logic (e.g., 74C906) with a 24k pull-up resistor ensures clean turn-off. This behavior is confirmed in the Absolute Maximum Ratings table and Applications Information section, which specifies IS < 200µA in shutdown and shows measured waveforms with <1µs transition time. The LT1206CT7#PBF remains fully functional after repeated shutdown cycles.

Can the LT1206CT7#PBF operate from a single +12V supply?

Yes, the LT1206CT7#PBF supports single-supply operation from +12V with appropriate level-shifting. Its input common-mode range extends to within 2V of either rail (per Figure 14), and output swing reaches ±11.5V on ±15V supplies - implying ~10V p-p swing on +12V with ground reference. However, optimal video performance (e.g., 0.02% differential gain) is specified for ±15V operation. For single-supply use, bias the inputs at VCC/2 using resistive dividers and AC-couple outputs. The LT1206CT7#PBF's rail-to-rail input stage and shutdown functionality make it adaptable to such configurations, though full datasheet parameters assume dual supplies.

What is the purpose of the COMP pin on the LT1206CT7#PBF?

On the LT1206CT7#PBF, the COMP pin (Pin 3) enables an internal compensation network that counteracts peaking caused by capacitive loads. When a 0.01µF capacitor is connected between COMP and OUT, it flattens frequency response up to 10,000pF - eliminating the 5dB peak at 40MHz seen without compensation (Figure 1). This network is optional: leaving COMP open preserves full bandwidth for resistive loads (e.g., 55MHz at 30Ω), while connecting it trades ~20MHz bandwidth for stability with cables or PCB traces. The LT1206CT7#PBF's datasheet confirms this dual-mode behavior in the Applications Information section and Typical Performance Characteristics (Figure 1).

Is the LT1206CT7#PBF pin-compatible with other LT1206 package variants?

No, the LT1206CT7#PBF (T7, 7-pin TO-220) is not pin-compatible with LT1206CN8#PBF (8-pin DIP) or LT1206CS8#PBF (8-pin SO). Pin count differs (7 vs. 8), and pin assignments vary: the T7 package omits NC (Pin 1 in DIP/SO) and consolidates functions - e.g., V+ connects to both Pin 4 and the metal tab, whereas DIP/SO assign V+ to Pin 8. The LT1206CT7#PBF datasheet's Pin Configuration diagrams explicitly show distinct layouts, and thermal design requirements (θJC = 5°C/W vs. θJA = 100°C/W for DIP) further preclude drop-in replacement. Board redesign is required when substituting packages.