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Home > Products > Integrated Circuits (ICs) > Linear > Special Purpose Amplifiers

Analog Devices Inc. LTC6409CUDB#TRPBF

Name: LTC6409CUDB#TRPBF
Brand: Analog Devices Inc.
SKU: LTC6409CUDB#TRPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LTC6409CUDB#TRPBF

Manufacturer:: Analog Devices Inc.

Category:: Special Purpose Amplifiers

Package:: 10-VFQFN Exposed Pad

Datasheet:: LTC6409CUDB#TRPBF.pdf

Description:: IC ADC DRIVER 10QFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

LTC6409CUDB#TRPBF from Analog Devices is a 10 GHz gain-bandwidth, 1.1 nV/√Hz differential amplifier and ADC driver optimized for high-speed data acquisition. It features ground-referenced DC-coupled input, adjustable output common mode voltage (0.5 V to 3.5 V), 3300 V/µs slew rate, and operates from 2.7 V to 5.25 V supply. It drives differential-input ADCs such as the LTC2262-14 at 150 MSPS with 88 dB SFDR at 100 MHz.

For engineers reviewing the LTC6409CUDB#TRPBF datasheet, LTC6409CUDB#TRPBF pinout, LTC6409CUDB#TRPBF application, or LTC6409CUDB#TRPBF equivalent, key selection criteria include differential slew rate, input noise density, SFDR at RF frequencies, shutdown current (100 µA), and QFN-10 package compatibility with high-density PCB layouts.

Technical Context

The LTC6409CUDB#TRPBF employs a fully differential architecture with independent +IN/–IN inputs and +OUT/–OUT outputs, enabling precise single-ended-to-differential conversion without external level-shifting circuitry. Its input common mode range includes ground (0 V to 1.5 V at 3 V supply), and VOCM pin sets output common mode voltage with ±1 mV offset accuracy.

It uses external gain-setting resistors (RI/RF) to configure closed-loop gain ≥1 V/V and supports no-overshoot compensation for time-domain applications. The internal common-mode feedback loop ensures stable VOUTCM = (V+OUT + V–OUT)/2, decoupled from input common mode variations.

Key Specifications

Parameter	Value and Actual Design Meaning
Gain-Bandwidth Product	10 GHz - enables stable unity-gain operation while preserving bandwidth for wideband signal conditioning before ADC sampling.
Differential Input Noise Density	1.1 nV/√Hz at 1 MHz - minimizes added noise in high-resolution, low-amplitude RF/IF signal chains.
SFDR @ 100 MHz	88 dBc at 2 V_P-P - ensures clean spectral representation for demanding communications and test equipment applications.
Differential Slew Rate	3300 V/µs - supports fast transient response and accurate reproduction of high-slew-rate signals up to 550 MHz full-power bandwidth.
Supply Current	52 mA typical - balances high-speed performance with manageable power dissipation in compact 3 mm × 2 mm QFN packages.
Shutdown Current	100 µA - enables rapid power gating during idle cycles without compromising turn-on/turn-off timing (t_ON = 160 ns, t_OFF = 80 ns).
Operating Temperature Range	0°C to 70°C - specified performance range for commercial-grade high-speed signal conditioning in data-acquisition systems.

Pinout & Package

The LTC6409CUDB#TRPBF is housed in a 10-pin, 3 mm × 2 mm × 0.75 mm leadless QFN package (UDB) with exposed thermal pad connected to V–. Pin 11 (exposed pad) must be soldered to V– for thermal and electrical integrity.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (–OUT)	Differential Output (Inverted)	Provides complementary output voltage referenced to VOCM; requires series termination (≥10 Ω) when driving capacitive loads.
Pin 2 (+IN)	Non-Inverting Input	Accepts single-ended or differential input; input common mode includes ground for direct coupling of baseband signals.
Pin 3 (SHDN)	Shutdown Control Input	CMOS logic input with 150 kΩ internal pull-up; driven to V– to reduce supply current to 100 µA.
Pin 4 (V+)	Positive Supply Rail	Connects to main positive supply (2.7 V to 5.25 V); pins 4 and 8 are tied together internally and externally for low-impedance routing.
Pin 5 (VOCM)	Output Common Mode Reference	Sets VOUTCM = (V+OUT + V–OUT)/2; open-circuit default is 1.25 V at 5 V supply; input resistance = 40 kΩ.
Pin 6 (–IN)	Inverting Input	Completes differential input pair; matched to +IN for balanced signal handling and even-harmonic cancellation.
Pin 7 (+OUT)	Differential Output (Non-Inverted)	Primary output leg; swing range is 0.06 V to (V+ – 1 V) with 20 mA drive capability per output.
Pins 8, 9, 10 (V+, V–, V–)	Power Supply Connections	V+ (pin 8) and V– (pins 9 & 10) provide dual low-inductance supply paths; exposed pad (pin 11) must connect to V– plane.

Key Features

Feature	Design Value
Ground-inclusive input common mode	Enables direct DC coupling of 0 V-referenced sensors or DAC outputs without AC coupling or biasing networks.
Adjustable output common mode voltage	Allows precise matching to ADC input requirements (e.g., 0.9 V for LTC2262-14), eliminating level-shifter ICs and reducing BOM count.
External gain configuration	Supports gain ≥1 V/V via precision resistor pairs (RI/RF), enabling tailored frequency response and stability for specific signal chain bandwidths.
Hardware shutdown with fast switching	Reduces system standby power by >99% while maintaining sub-200 ns wake-up latency for burst-mode acquisition systems.
High output balance (–70 dB)	Minimizes even-order distortion and improves effective resolution when driving pipeline or SAR ADCs with differential inputs.

Applications

Communications Receiver Front-End	High-Speed Data Acquisition Card
Use Scenario: Digitizing IF signals from mixer outputs in software-defined radio (SDR) receivers operating up to 140 MHz. IC Role / Device Role / Timing Role: Differential ADC driver converting single-ended 70 MHz IF to matched differential pair for LTC2262-14 sampling at 150 MSPS. Use Value: 88 dB SFDR at 100 MHz and 1.1 nV/√Hz noise preserve dynamic range and SNR in narrowband channel selection.	Use Scenario: Signal conditioning stage in automated test equipment capturing fast transients on semiconductor wafer probes. IC Role / Device Role / Timing Role: High-fidelity buffer and level shifter between FPGA-based waveform generator and 14-bit, 150 MSPS ADC. Use Value: 3300 V/µs slew rate and 550 MHz full-power bandwidth ensure <1.9 ns settling time for step responses critical in time-domain reflectometry.
Time Domain Reflectometry (TDR)	Pipeline ADC Interface for Medical Imaging
Use Scenario: Driving differential inputs of high-speed ADCs in TDR systems measuring impedance discontinuities on PCB traces or cables. IC Role / Device Role / Timing Role: Fast-settling, low-distortion driver delivering calibrated 2 V_P-P pulses into 400 Ω differential load with <1% error. Use Value: 1% settling time of 1.9 ns and –93 dBc HD2 at 100 MHz enable sub-nanosecond edge fidelity and minimal pulse distortion.	Use Scenario: Interfacing ultrasound beamformer ASICs to 14-bit pipeline ADCs in portable medical imaging devices. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail capable driver translating 0–1.8 V single-ended analog front-end outputs to differential ADC inputs. Use Value: Input common mode range including ground and 0.5–3.5 V VOCM range allow seamless integration with low-voltage mixed-signal SoCs.

Communications Receiver Front-End

High-Speed Data Acquisition Card

Use Scenario: Digitizing IF signals from mixer outputs in software-defined radio (SDR) receivers operating up to 140 MHz.

IC Role / Device Role / Timing Role: Differential ADC driver converting single-ended 70 MHz IF to matched differential pair for LTC2262-14 sampling at 150 MSPS.

Use Value: 88 dB SFDR at 100 MHz and 1.1 nV/√Hz noise preserve dynamic range and SNR in narrowband channel selection.

Use Scenario: Signal conditioning stage in automated test equipment capturing fast transients on semiconductor wafer probes.

IC Role / Device Role / Timing Role: High-fidelity buffer and level shifter between FPGA-based waveform generator and 14-bit, 150 MSPS ADC.

Use Value: 3300 V/µs slew rate and 550 MHz full-power bandwidth ensure <1.9 ns settling time for step responses critical in time-domain reflectometry.

Time Domain Reflectometry (TDR)

Pipeline ADC Interface for Medical Imaging

Use Scenario: Driving differential inputs of high-speed ADCs in TDR systems measuring impedance discontinuities on PCB traces or cables.

IC Role / Device Role / Timing Role: Fast-settling, low-distortion driver delivering calibrated 2 V_P-P pulses into 400 Ω differential load with <1% error.

Use Value: 1% settling time of 1.9 ns and –93 dBc HD2 at 100 MHz enable sub-nanosecond edge fidelity and minimal pulse distortion.

Use Scenario: Interfacing ultrasound beamformer ASICs to 14-bit pipeline ADCs in portable medical imaging devices.

IC Role / Device Role / Timing Role: Low-noise, rail-to-rail capable driver translating 0–1.8 V single-ended analog front-end outputs to differential ADC inputs.

Use Value: Input common mode range including ground and 0.5–3.5 V VOCM range allow seamless integration with low-voltage mixed-signal SoCs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADA4940-1ARZ	Lower GBW (1 GHz), higher input noise (2.3 nV/√Hz), fixed 3 V supply only, SOIC-8 package	Better suited for lower-frequency (<100 MHz), lower-power applications where board space is less constrained	Select when cost sensitivity outweighs bandwidth/noise requirements and SOIC-8 footprint is acceptable.
THS4561IRGET	Higher supply current (65 mA), wider supply range (2.7–5.4 V), 4.8 GHz GBW, 1.6 nV/√Hz noise, 12-pin QFN	Offers higher drive strength and better PSRR but trades off slightly higher noise and larger package	Prefer for systems requiring >60 mA output drive or tighter PSRR specs, accepting minor noise penalty.

Compared with ADA4940-1ARZ and THS4561IRGET, the LTC6409CUDB#TRPBF delivers superior 10 GHz bandwidth and lowest input noise (1.1 nV/√Hz), making it optimal for ultra-wideband, high-dynamic-range ADC interfaces where signal integrity at >100 MHz is critical.

Availability

LTC6409CUDB#TRPBF is available at Aetrix Electronics and suitable for high-speed data-acquisition cards, automated test equipment, and communications receivers requiring stable component supply across commercial temperature grades.

Supply support for LTC6409CUDB#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.

The LTC6409CUDB#TRPBF belongs to Analog Devices' high-speed amplifier product line, designed specifically for precision, wideband signal conditioning in ADC driver and RF/IF interface applications.

FAQ

What is the maximum operating temperature range for the LTC6409CUDB#TRPBF?

The LTC6409CUDB#TRPBF is specified for operation from 0°C to 70°C. While the underlying die is rated for –40°C to 125°C, this particular variant (C-grade) undergoes full performance testing and qualification only within the 0°C to 70°C range. For extended temperature operation, consider the LTC6409HUDB#TRPBF (–40°C to 125°C) or LTC6409IUDB#TRPBF (–40°C to 85°C). The LTC6409CUDB#TRPBF remains fully functional outside its tested range but is not guaranteed to meet all specifications beyond 0°C to 70°C.

Can the LTC6409CUDB#TRPBF drive the LTC2262-14 ADC directly without external components?

Yes, the LTC6409CUDB#TRPBF can drive the LTC2262-14 ADC directly using the reference design shown in the datasheet (Figure TA01), which includes 150 Ω series resistors per output and 1.3 pF shunt capacitors. These components optimize frequency response flatness and minimize reflections. The LTC6409CUDB#TRPBF's 3300 V/µs slew rate, 88 dB SFDR at 100 MHz, and adjustable VOCM (set to 0.9 V) match the LTC2262-14's input requirements precisely, enabling high-fidelity signal transfer without additional active circuitry.

How does the SHDN pin function on the LTC6409CUDB#TRPBF?

The SHDN pin on the LTC6409CUDB#TRPBF is a CMOS logic input with an internal 150 kΩ pull-up resistor. When left floating or tied to V+, the LTC6409CUDB#TRPBF operates normally (52 mA supply current). When pulled to V–, it enters shutdown mode, reducing supply current to 100 µA. Turn-on and turn-off times are 160 ns and 80 ns respectively. No external pull-down resistor is required-direct connection to ground or a logic-low control signal suffices for reliable power gating.

What is the purpose of the VOCM pin on the LTC6409CUDB#TRPBF?

The VOCM pin on the LTC6409CUDB#TRPBF sets the output common mode voltage (VOUTCM = (V+OUT + V–OUT)/2) via an internal feedback loop. It accepts voltages from 0.5 V to 3.5 V (depending on supply), allowing precise alignment with ADC input common mode requirements-for example, 0.9 V for the LTC2262-14. If left unconnected, it defaults to ~1.25 V with a 5 V supply. Its 40 kΩ input resistance permits direct connection to low-impedance ADC reference outputs without loading errors.

Does the LTC6409CUDB#TRPBF require matched external resistors for optimal performance?

Yes, the LTC6409CUDB#TRPBF requires matched external gain-setting resistors (RI and RF) to minimize common-mode-to-differential conversion and maintain high CMRR. Using 0.1% tolerance resistors achieves ~54 dB worst-case CMRR; 1% resistors degrade performance significantly. Mismatch induces apparent input offset voltage (e.g., up to 1.25 mV with 0.1% mismatch at VCM = 0 V, VOCM = 1.25 V), directly impacting DC accuracy and harmonic distortion. Precision matching is essential for applications demanding >80 dB SFDR or sub-mV DC precision.

LTC6409CUDB#TRPBF Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 10-VFQFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: ADC Driver

Applications:: Data Acquisition

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

Supplier Device Package:: 10-QFN (3x2)

LTC6409CUDB#TRPBF FAQ

1.How can I place an order for LTC6409CUDB#TRPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for LTC6409CUDB#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for LTC6409CUDB#TRPBF reliable?

The price and inventory of LTC6409CUDB#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6409CUDB#TRPBF is usually 5 days.

3.What payment methods are accepted for LTC6409CUDB#TRPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6409CUDB#TRPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LTC6409CUDB#TRPBF?

LTC6409CUDB#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LTC6409CUDB#TRPBF order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for LTC6409CUDB#TRPBF?

For technical support, including LTC6409CUDB#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6409CUDB#TRPBF requirements.

6.How does Aetrix verify that LTC6409CUDB#TRPBF is sourced from the original manufacturer or authorized distributors?

All LTC6409CUDB#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC6409CUDB#TRPBF meets industry standards.

7.What is the process for return or replacement of LTC6409CUDB#TRPBF?

All LTC6409CUDB#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6409CUDB#TRPBF, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The LTC6409CUDB#TRPBF part is unused and in its original packaging.

Return procedure for LTC6409CUDB#TRPBF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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