Analog Devices Inc. LTC6229IDD#TRPBF

Overview

LTC6229IDD#TRPBF from Analog Devices is a dual, rail-to-rail output, unity-gain stable operational amplifier optimized for high-speed, low-noise signal conditioning. It delivers 730MHz –3dB bandwidth (AV = +1), 890MHz gain-bandwidth product, 500V/µs slew rate, and ultra-low 0.88nV/√Hz input voltage noise - enabling precision driving of 18-bit SAR ADCs like the LTC2387-18 in high-dynamic-range data acquisition systems.

For engineers reviewing the LTC6229IDD#TRPBF datasheet, LTC6229IDD#TRPBF pinout, LTC6229IDD#TRPBF application, or LTC6229IDD#TRPBF equivalent, key selection criteria include its 10-lead 3mm × 3mm DFN package with exposed V– pad, shutdown control with 500µA disable current, bias current cancellation enable/disable capability, and guaranteed operation from –40°C to 85°C across 2.8V to 11.75V supplies.

Technical Context

The LTC6229IDD#TRPBF implements a fully differential, complementary bipolar input stage with internal bias current cancellation circuitry that can be enabled or disabled via the SHDN pin to optimize noise versus input current trade-offs. Its unity-gain stability and rail-to-rail output swing (within 20mV of rails at 25mA load) support single-supply and split-supply configurations without external compensation.

It features independent shutdown control per channel, allowing one amplifier to remain active while the other is disabled - critical for power-sensitive multichannel systems. The device maintains >100dB CMRR and PSRR up to 10MHz, and its open-loop gain exceeds 135dB (5.6V/µV) into 1kΩ, ensuring high DC accuracy even under fast transient conditions.

Key Specifications

Pinout & Package

Package: 10-lead 3mm × 3mm plastic DFN with exposed V– pad (Pin 11), requiring soldering to PCB ground plane for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed, low-noise op amp applications.

Compared with ADA4898-2ARMZ and LMH6629MA/NOPB, the LTC6229IDD#TRPBF uniquely combines ultra-low noise (0.88nV/√Hz), 730MHz bandwidth, rail-to-rail output, dual-channel shutdown, and 10-lead DFN packaging - making it the only option among the three qualified for precision, power-aware, high-dynamic-range ADC interface designs.

Availability

LTC6229IDD#TRPBF is available at Aetrix Electronics and suitable for high-speed data acquisition, active filtering, video signal conditioning, and low-voltage audio applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for LTC6229IDD#TRPBF 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 semiconductors, serving industrial, communications, automotive, and healthcare markets.

The LTC6229IDD#TRPBF belongs to ADI's LTC® precision high-speed op amp family, engineered specifically for demanding signal chain applications where noise, speed, DC accuracy, and power efficiency must coexist - such as 16–18-bit data acquisition, medical imaging front-ends, and test equipment.

FAQ

What is the operating temperature range for the LTC6229IDD#TRPBF?

The LTC6229IDD#TRPBF is specified for operation from –40°C to +85°C (Industrial grade). This range is confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables of the official datasheet, with all key parameters - including offset drift (0.4µV/°C), bandwidth (730MHz), and supply current (16.5mA) - guaranteed across this full span.

Does the LTC6229IDD#TRPBF support single-supply operation?

Yes, the LTC6229IDD#TRPBF supports true single-supply operation from 2.8V to 11.75V total supply range. Its input common-mode range extends to the negative rail (V– – 0.1V), and its rail-to-rail output swings within 20mV of V– and 60mV of V+ at 25mA load - enabling direct interfacing with 3V or 5V microcontrollers and ADCs without level-shifting circuitry.

How does the SHDN pin function on the LTC6229IDD#TRPBF?

The LTC6229IDD#TRPBF has two independent SHDN pins (SHDNA and SHDNB), each controlling one amplifier channel. A voltage >V+ – 1.6V enables the channel;

What is the maximum capacitive load the LTC6229IDD#TRPBF can drive stably?

The LTC6229IDD#TRPBF remains stable driving ≥1000pF with a series output resistor (RS) ≥20Ω at AV = +1, per Figure 35 in the datasheet. Without RS, stability is maintained up to ~100pF. For larger loads (e.g., ADC input capacitance), adding a 20–50Ω isolation resistor in series with the output ensures phase margin >45° and prevents ringing - a design practice validated in the typical application circuit for LTC2387-18 driving.

Is the LTC6229IDD#TRPBF pin-compatible with other devices in the LTC6228/LTC6229 family?

No - the LTC6229IDD#TRPBF uses a 10-lead 3mm × 3mm DFN package (DD), while LTC6229IMS8E#TRPBF uses an 8-lead MSOP and LTC6228 variants use 6- or 8-lead packages. Pin count, pinout, and footprint differ across packages; the DD variant's 10-pin layout (including separate SHDN pins and exposed V– pad) is unique to this configuration and not interchangeable without PCB redesign.