Analog Devices Inc. LT6600IDF-10#PBF

Overview

LT6600IDF-10#PBF from Analog Devices (formerly Linear Technology) is a fully differential amplifier with integrated 4th-order 10MHz Chebyshev lowpass antialiasing filter, operating from single 3V/5V or dual ±5V supplies. It delivers 82dB SNR at 3V with 2VP-P output, −0.1dB passband flatness to 1MHz, and <0.5dB ripple up to 10MHz cutoff - optimized for high-speed ADC driver and DAC smoothing in base station receivers.

For engineers reviewing the LT6600IDF-10#PBF datasheet, LT6600IDF-10#PBF pinout, LT6600IDF-10#PBF application, or LT6600IDF-10#PBF equivalent, key selection criteria include its programmable differential gain via two external resistors, adjustable VOCM-controlled output common mode voltage, 12-Lead DFN (4mm × 4mm) package with exposed V– pad, and guaranteed −40°C to +85°C industrial temperature operation.

Technical Context

The LT6600IDF-10#PBF integrates a proprietary differential amplifier stage followed by a precision 4th-order lowpass filter with fixed 10MHz cutoff and 0.5dB Chebyshev passband ripple. Its internal architecture eliminates need for external filter components while preserving low distortion: 88dBc 2nd harmonic and 97dBc 3rd harmonic at 1MHz, 2VP-P into 800Ω load.

It supports flexible level shifting: VMID sets first-stage output common mode (internally biased to mid-supply), while VOCM independently programs final differential output common mode voltage. Input bias current is −40μA typical, input-referred differential offset is 10mV max at 5V supply, and noise is 56μVRMS (10kHz–10MHz) with RIN = 402Ω.

Key Specifications

Pinout & Package

LT6600IDF-10#PBF uses a 12-lead (4mm × 4mm) plastic DFN package with exposed thermal pad connected to V– (Pin 13). The package is RoHS-compliant, lead-free, and rated for −40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC6602CS8-10#PBF, LT6600IDF-10#PBF offers superior thermal management via its DFN package's exposed V– pad, enabling sustained 39mA operation in compact base station modules; compared with AD8138ARZ, it eliminates external filter component count and variability while delivering lower integrated noise and guaranteed 10MHz cutoff accuracy.

Availability

LT6600IDF-10#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, medical imaging, and high-speed test equipment requiring stable component supply, guaranteed −40°C to +85°C operation, and RoHS-compliant packaging.

Supply support for LT6600IDF-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 acquired Linear Technology in 2017 and maintains full product support, manufacturing, and documentation for all LT® parts including the LT6600 family.

The LT6600 product line was designed specifically for high-performance analog signal chain applications requiring integrated filtering and differential drive capability - targeting wireless communications, instrumentation, and medical imaging systems where board space, thermal constraints, and signal fidelity are critical.

FAQ

What is the exact filter topology and response type of the LT6600IDF-10#PBF?

The LT6600IDF-10#PBF implements a 4th-order lowpass filter with a Chebyshev response characterized by 0.5dB passband ripple and a nominal −3dB cutoff at 10MHz. This topology is fully integrated and internally trimmed - no external capacitors or inductors are required. The LT6600IDF-10#PBF achieves this using proprietary active-filter stages within its differential amplifier architecture, ensuring consistent performance across temperature and supply voltage.

Can the LT6600IDF-10#PBF operate from a single 3.3V supply?

Yes, the LT6600IDF-10#PBF is fully specified and characterized for single 3V operation, and functions reliably at 3.3V. At 3.3V, it delivers 82dB SNR with 2VP-P output, maintains 0.5dB passband ripple up to 10MHz, and supports differential output swing of 3.85VP-P. The VMID and VOCM pins scale proportionally, allowing proper common mode alignment with 3.3V ADC references.

How is differential gain set on the LT6600IDF-10#PBF, and what is the gain equation?

Differential gain on the LT6600IDF-10#PBF is set using two identical external resistors (RIN) connected from IN+ and IN– to the signal source. The gain equation is G = 1580Ω / RIN (for DFN/SO packages). For example, RIN = 402Ω yields G = 3.93 ≈ 4 V/V (12dB); RIN = 100Ω yields G = 15.8 V/V (24dB). Gain remains stable across temperature due to matched internal feedback resistors.

What is the function of the VMID and VOCM pins on the LT6600IDF-10#PBF, and how do they differ?

VMID (Pin 10) sets the common mode voltage of the first differential amplifier stage and is internally biased near mid-supply (e.g., 1.65V at 3.3V). VOCM (Pin 3) sets the final differential output common mode voltage and is a high-impedance input. They operate independently: VMID affects internal node biasing, while VOCM directly determines the average of OUT+ and OUT–. Shorting VOCM to VMID simplifies design but decoupling them enables independent level-shifting - essential for interfacing with mismatched ADC reference voltages.

Does the LT6600IDF-10#PBF require external passive components for basic operation?

Yes - the LT6600IDF-10#PBF requires two matched external resistors (RIN) to set differential gain, plus mandatory 0.1μF ceramic bypass capacitors from V+ to V– and 0.01μF capacitors on VMID and VOCM. No external filter components are needed for the 10MHz lowpass function, as it is fully integrated. The DFN package's exposed V– pad must be soldered to a PCB ground plane for thermal and electrical performance.