Analog Devices Inc. LT6600CS8-10#PBF

Overview

LT6600CS8-10#PBF from Analog Devices (formerly Linear Technology) is a fully differential amplifier integrated with a 4th-order 10MHz Chebyshev lowpass antialiasing filter, designed for high-fidelity signal conditioning ahead of high-speed ADCs. It delivers 82dB SNR at 3V supply with 2VP-P output, supports programmable gain via two external resistors, and sets output common mode voltage via VOCM pin - enabling direct interface to 3V/5V/±5V ADC references.

For engineers reviewing the LT6600CS8-10#PBF datasheet, LT6600CS8-10#PBF pinout, LT6600CS8-10#PBF application, or LT6600CS8-10#PBF equivalent, key selection criteria include its 10MHz cutoff with 0.5dB passband ripple, input-referred noise of 56μVRMS (10kHz–10MHz), distortion performance (–88dBc 2nd harmonic @1MHz), differential I/O compatibility, and SO-8 package thermal characteristics under 3V operation.

Technical Context

The LT6600CS8-10#PBF integrates a proprietary differential amplifier stage and a 4th-order lowpass filter in a single monolithic IC, eliminating need for external precision passive components to set bandwidth or ripple. Its internal architecture maintains low distortion (<–74dBc 2nd harmonic @5MHz) and low noise while supporting unity-to-4× differential gain via external R_IN resistors.

It features dual independent common-mode control: VMID sets first-stage output common mode (internally biased at mid-supply), while VOCM programs final differential output common mode voltage (0–3V range on 3V supply). Both pins are high-impedance inputs requiring local 0.01μF bypassing.

Key Specifications

Pinout & Package

LT6600CS8-10#PBF uses an 8-lead plastic SO (SO-8) package with exposed lead frame for thermal enhancement. Pin 6 is fused to the lead frame and intended for connection to a ground plane or large copper pour to reduce θ_JA.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar differential amplifier + antialiasing filter applications.

Compared with LT6600IS8-10#PBF, the LT6600CS8-10#PBF trades extended temperature coverage for cost and availability advantages in commercial applications; versus LT6600CDF-10#PBF, it offers proven SO-8 manufacturability and simpler thermal management for moderate-power designs.

Availability

LT6600CS8-10#PBF is available at Aetrix Electronics and suitable for medical ultrasound front-ends, cellular base station IF sampling chains, and high-speed automated test equipment requiring stable component supply, long-term obsolescence mitigation, and traceable sourcing.

Supply support for LT6600CS8-10#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 precision instrumentation, communications, and industrial markets.

The LT6600 family was developed by Linear Technology (acquired by ADI in 2017) to solve system-level challenges in high-speed data acquisition - specifically eliminating discrete filter/amplifier combinations while preserving SNR, linearity, and thermal stability in compact SO-8 and DFN packages.

FAQ

What is the maximum differential input voltage supported by the LT6600CS8-10#PBF?

The LT6600CS8-10#PBF begins limiting output differential swing above 2VP-P and exhibits noticeable compression above 3.5VP-P - independent of supply voltage. This internal protection prevents excessive power dissipation and provides short-circuit resilience. For full linear operation, keep differential input signals ≤2VP-P when configured for unity gain; higher gains proportionally reduce allowable input amplitude per the gain-setting resistor ratio.

Can the LT6600CS8-10#PBF operate from a single 3.3V supply?

Yes, the LT6600CS8-10#PBF is fully specified and characterized for single 3V operation (including 82dB SNR and –88dBc distortion), and functions reliably at 3.3V. The VMID pin biases to ~1.65V, and VOCM can be tied to VMID to set output common mode at mid-supply - making it ideal for interfacing with 3.3V ADCs such as the LTC22xx or AD92xx families without external level shifters.

How does the LT6600CS8-10#PBF achieve its 0.5dB passband ripple?

The LT6600CS8-10#PBF achieves its 0.5dB Chebyshev passband ripple through a proprietary monolithic 4th-order active filter topology implemented within the same die as its differential amplifiers. Unlike cascaded Sallen-Key stages, this architecture minimizes sensitivity to component mismatch and temperature drift - delivering consistent 10MHz cutoff and ripple performance across voltage, temperature, and process variations without external tuning.

What is the recommended bypassing strategy for the VMID and VOCM pins on the LT6600CS8-10#PBF?

Both VMID and VOCM require local 0.01μF ceramic capacitors to AC ground (V− for single-supply operation). VMID must be bypassed regardless of whether it's used as a reference or overridden; VOCM bypassing is mandatory unless driven by a low-impedance, well-regulated voltage source. Place capacitors within 2mm of respective pins using short, wide traces - poor VMID grounding increases distortion and noise, while floating VOCM causes output common mode instability.

Does the LT6600CS8-10#PBF support single-ended input configurations?

Yes, the LT6600CS8-10#PBF supports single-ended inputs via AC coupling - as shown in Figure 2 of the datasheet. A 0.1μF series capacitor and matched 402Ω R_IN resistors convert the single-ended source into a pseudo-differential input referenced to VMID. This configuration maintains >60dB CMRR and preserves SNR, though it introduces a high-pass corner at ~4kHz; larger coupling capacitors lower this frequency proportionally.