LTC6406IMS8E#PBF

Overview

The LTC6406IMS8E#PBF is a low noise, low distortion, fully differential amplifier optimized for single-supply operation. It features rail-to-rail input common mode range and independently adjustable output common mode voltage via the VOCM pin. The device operates on a 2.7V to 3.5V supply, drawing 18mA typically. It offers a 3GHz gain-bandwidth product and an 800MHz -3dB bandwidth at unity gain. The output swing extends from near ground to 2V. It includes a hardware shutdown feature reducing current to 300μA. The IMS8E variant is specified for -40°C to 85°C temperature range.

Feature Summary

• Rail-to-rail differential input stage accommodating wide common mode ranges
• Independently adjustable output common mode voltage for flexible level shifting
• Low power consumption with dedicated hardware shutdown capability
• High linearity performance suitable for driving high-resolution ADCs

Applications

• Differential input ADC driver
• Single-ended to differential conversion
• Level-shifting ground-referenced signals
• Level-shifting VCC-referenced signals
• High linearity direct conversion receivers

Procurement Notes

Verify the suffix IMS8E corresponds to the 8-lead MSOP package and industrial temperature range (-40°C to 85°C). Confirm the #PBF designation indicates lead-free finish. Ensure the ordering part number matches the specific grade required for your application environment. Cross-reference the datasheet revision date to ensure compatibility with latest electrical characteristics.

Selection Notes

Select this component when driving 12-bit to 16-bit single-supply differential ADCs requiring level shifting. The adjustable VOCM pin allows matching various ADC input common mode requirements. Consider the 3GHz GBW for high-frequency signal integrity. Evaluate the 18mA supply current against system power budgets. Verify that the 8-lead MSOP package fits the PCB layout constraints compared to the QFN option.

Part Context

The LTC6406 series includes variants in 16-lead QFN and 8-lead MSOP packages. The IMS8E specifically denotes the industrial temperature grade version in the MSOP form factor. Other grades include the C-grade (commercial) and U-grade (QFN). All variants share core electrical specifications but differ in thermal performance and operating temperature limits.

Replacement Considerations

Direct substitutes within the same family include LTC6406CMS8E#PBF for commercial temperature applications. For QFN packaging needs, consider LTC6406IUD#PBF. Ensure replacement parts maintain the same supply voltage range and package footprint if board space is constrained.

FAQ

How is the output common mode voltage controlled?

The output common mode voltage is set by applying a voltage to the VOCM pin. If left open, it defaults to approximately 1.25V with a 3V supply.

What is the function of the SHDN pin?

Connecting the SHDN pin to V- activates a low-power shutdown state, reducing supply current to 300μA and placing outputs in a high-impedance state.

Can the LTC6406 drive capacitive loads directly?

Each output can drive up to 5pF directly. For larger capacitive loads, decoupling resistors of at least 15Ω should be used from each output.