Analog Devices

The LTC6405 is a very low noise, low distortion, fully differential input/output amplifier optimized for 5V, single supply operation. The LTC6405 input common mode range is rail-to-rail, while the output common mode voltage is independently adjustable by applying a voltage on the VOCMpin. This makes the LTC6405 ideal for level shifting signals with a wide common mode range for driving 12-bit to 16-bit single supply, differential input ADCs.A 2.7GHz gain-bandwidth product results in 65dB linearity for 50MHz input signals. The LTC6405 is unity gain stable and the closed-loop bandwidth extends from DC to 800MHz. The output voltage swing extends from near-ground to 4V, to be compatible with a wide range of ADC converter input requirements. The LTC6405 draws only 18mA, and has a hardware shutdown feature which reduces current consumption to 400μA.The LTC6405 is available in a compact 3mm × 3mm 16‑pin leadless QFN package, as well as an 8-lead MSOP package, and operates over a –40°C to 85°C temperature range.ApplicationsDifferential Input ADC DriverSingle-Ended to Differential ConversionLevel-Shifting Ground-Referenced SignalsLevel-Shifting VCC-Referenced SignalsHigh-Linearity Direct Conversion Receivers

The LTC6406 is a very low noise, low distortion, fully differential input/output amplifier optimized for 3V, single supply operation. The LTC6406 input common mode range is rail-to-rail, while the output common mode voltage is independently adjustable by applying a voltage on the VOCMpin. This makes the LTC6406 ideal for level shifting signals with a wide common mode range for driving 12-bit to 16-bit single supply, differential input ADCs.A 3GHz gain-bandwidth product results in 70dB linearity for 50MHz input signals. The LTC6406 is unity gain stable and the closed-loop bandwidth extends from DC to 800MHz. The output voltage swing extends from near-ground to 2V, to be compatible with a wide range of ADC converter input requirements. The LTC6406 draws only 18mA, and has a hardware shutdown feature which reduces current consumption to 300µA.The LTC6406 is available in a compact 3mm x 3mm 16-pin leadless QFN package as well as an 8-lead MSOP package, and operates over a –40°C to 85°C temperature range.ApplicationsDifferential Input ADC DriverSingle-Ended to Differential ConversionLevel-Shifting Ground-Referenced SignalsLevel-Shifting VCC-Referenced SignalsHigh-Linearity Direct Conversion Receivers

The LTC6409 is a very high speed, low distortion, differential amplifier. Its input common mode range includes ground, so that a ground-referenced input signal can be DC-coupled, level-shifted, and converted to drive an ADC differentially.The gain and feedback resistors are external, so that the exact gain and frequency response can be tailored to each application. For example, the amplifier could be externally compensated in a no-overshoot configuration, which is desired in certain time-domain applications.The LTC6409 is stable in a differential gain of 1. This allows for a low output noise in applications where gain is not desired. It draws 52mA of supply current and has a hardware shutdown feature which reduces current consumption to 100μA.The LTC6409 is available in a compact 3mm × 2mm 10‑pin leadless QFN package and operates over a –40°C to 125°C temperature range.ApplicationsDifferential Pipeline ADC DriverHigh-Speed Data-Acquisition CardsAutomated Test EquipmentTime Domain ReflectometryCommunications Receivers

The LTC6410-6 is a low distortion, low noise differential IF amplifier with configurable input impedance designed for use in applications from DC to 1.4GHz. The LTC6410-6 has 6dB of voltage gain. The LTC6410-6 is an excellent choice for interfacing active mixers to SAW filters. It features an active input termination that allows a customized input impedance for an optimum interface to differential active mixers. This feature provides additional power gain because of the impedance conversion and improved noise performance when compared to traditional 50Ω interface circuits. The LTC6410-6 drives a differential 50Ω load directly with low distortion, which is suitable for driving SAW filters and other 50Ω signal chain blocks.The LTC6410-6 operates on 3V or 5V supplies. It comes in a compact 16-lead 3mm × 3mm QFN package and operates over a –40°C to 85°C temperature range.ApplicationsPost-Mixer Gain BlockSAW Filter Interface/BufferingDifferential IF Signal Chain Gain BlockDifferential Line Driver/Receiver

The LTC6412 is a fully differential variable gain amplifier with linear-in-dB analog gain control. It is designed for AC-coupled operation in IF receiver chains from 1MHz to 500MHz. The part has a constant OIP3 across a wide output amplitude range and across the 31dB gain control range. The output noise (NF + Gain) is also fl at versus gain to provide a uniform spurious-free dynamic range (SFDR) >120dB over the full gain control range at 240MHz.The LTC6412 is ideal for interfacing with the LT5527 and LT5557 downconverting mixers, LTC6410-6 IF amplifier and the LTC6400/LTC6401/LTC6416 ADC drivers for use in 12-, 14-, and 16-bit ADC applications.The LTC6412 recovers quickly from an overdrive condition, and theENpin allows for a fast output signal disable to protect sensitive downstream components. Asserting theSHDNpin reduces the current consumption below 1mA for power-down or sleep modes.ApplicationsIF Signal Chain Automatic Gain Control (AGC)2.5G and 3G Cellular Basestation TransceiversWiMAX, WiBro, WLAN ReceiversSatellite and GPS Receiver IF

The LTC6416 is a differential unity gain buffer designed to drive 16-bit ADCs with extremely low output noise and excellent linearity beyond 300MHz. Differential input impedance is 12kΩ, allowing 1:4 and 1:8 transformers to be used at the input to achieve additional system gain.With no external biasing or gain setting components and a flow-through pinout, the LTC6416 is very easy to use. It can be DC-coupled and has a common mode output offset of –40mV. If the input signals are AC-coupled, the LTC6416 input pins are internally biased to provide an output common mode voltage that is set by the voltage on the VCMpin.In addition the LTC6416 has high speed, fast recovery clamping circuitry to limit output signal swing. Both the high and low clamp voltages are internally biased to allow maximum output swing but are also user programmable via the CLLO and CLHI pins.Supply current is nominally 42mA and the LTC6416 operates on supply voltages ranging from 2.7V to 3.9V.The LTC6416 is packaged in a 10-lead 3mm × 2mm DFN package. Pinout is optimized for placement directly adjacent to Linear’s high speed 12-, 14- and 16-bit ADCs.ApplicationsDifferential ADC DriverIF Sampling ReceiversImpedance TransformerSAW Filter InterfaceCCD Buffer

The LTC6417 is a differential unity gain buffer that can drive a 50Ω load with extremely low noise and excellent linearity. It is well suited for driving high speed 14- and 16-bit pipeline ADCs with input signals from DC to beyond 600MHz. Differential input impedance is 18.5kΩ, allowing 1:4 and 1:8 transformers to be used at the input providing additional system gain in 50Ω systems.With no external biasing or gain setting components and a flow-through pinout, the LTC6417 is very easy to use. It can be DC-coupled and has a common mode output offset of -60mV. The LTC6417 input pins are internally biased to provide an output common mode voltage that is set by the voltage on the VCMpin for AC-coupled applications.Supply current is typically 123mA and the LTC6417 operates on supply voltages ranging from 4.75V to 5.25V. Power consumption can be reduced to 74mA via the PWRADJ pin. The LTC6417 also has a hardware shutdown feature which reduces current consumption to 24mA.The LTC6417 features fast, adjustable output voltage clamping to help protect subsequent circuitry. The CLHI pin sets the maximum swing, while a symmetric minimum swing is set up internally. LTC6417 VORpin will signal overrange when the clamps limit output voltage.The LTC6417 is packaged in a 20-lead 3mm x 4mm QFN package. Pinout is optimized for placement directly adjacent to Linear Technology’s high speed 14- and 16-bit ADCs.ApplicationsDifferential ADC DriverCCD BufferCable Driver50Ω Buffer

The LTC6419 is a dual very high speed, low distortion, differential amplifier. Its input common mode range includes ground, so that a ground-referenced single-ended or differential input signal can be DC-coupled, level-shifted, and converted to drive an ADC differentially.The gain and feedback resistors are external, so that the exact gain and frequency response can be tailored to each application. For example, the amplifier could be externally compensated in a no-overshoot configuration, which is desired in certain time-domain applications.The LTC6419 is stable in a differential gain of 1. This allows for low output noise in applications where gain is not desired. Each amplifier draws 52mA of supply current and has an independent shutdown pin which reduces current consumption to 100μA per amplifier.The LTC6419 is available in a compact 4mm × 3mm 20‑pin LQFN package and operates over a –40°C to 125°C temperature range.ApplicationsBroadband I/Q AmplifiersDual Differential ADC DriverHigh-Speed Data-Acquisition CardsAutomated Test EquipmentTime Domain ReflectometryCommunications Receivers

The LTC6420-20 is a dual high-speed differential amplifier targeted at processing signals from DC to 300MHz. The part has been specifically designed to drive 12-, 14- and 16-bit ADCs with low noise and low distortion, but can also be used as a general-purpose broadband gain block.The LTC6420-20 is easy to use, with minimal support circuitry required. The output common mode voltage is set using an external pin, independent of the inputs, which eliminates the need for transformers or AC-coupling capacitors in many applications. The gain is internally fixed at 20dB (10V/V).The LTC6420-20 saves space and power compared to alternative solutions using IF gain blocks and transformers. The LTC6420-20 is packaged in a compact 20-lead 3mm × 4mm QFN package and operates over the –40°C to 85°C temperature range.ApplicationsDifferential ADC DriverSingle Ended to Differential ConversionIF Sampling (Diversity) ReceiversBroadband I/Q AmplifiersSatellite Communications

The LTC6421-20 is a dual high speed differential amplifier targeted at processing signals from DC to 140MHz. The part has been specifically designed to drive 12-, 14- and 16-bit ADCs with low noise and low distortion, but can also be used as a general-purpose broadband gain block.The LTC6421-20 is easy to use, with minimal support circuitry required. The output common mode voltage is set using an external pin, independent of the inputs, which eliminates the need for transformers or AC-coupling capacitors in many applications. The gain is internally fixed at 20dB (10V/ V).The LTC6421-20 saves space and power compared to alternative solutions using IF gain blocks and transformers. The LTC6421-20 is packaged in a compact 20-lead 3mm × 4mm QFN package and operates over the – 40°C to 85°C temperature range.ApplicationsDifferential ADC DriverSingle Ended to Differential ConversionIF Sampling (Diversity) ReceiversBroadband I/Q AmplifiersSatellite Communications