Analog Devices

LTC6430-20 - 20.8dB Differential RF/IF Amplifier | Analog Devices

Name: LTC6430-20
Brand: Analog Devices
Price: 8.1 USD
Availability: InStock

MPN: LTC6430-20 ✓ Active

In Stock Ships in 1-3 business days

5 V (single) Vdss 24-lead QFN (4mm × 4mm) Package

From $8.1 USD / Unit

MOQ: 1 |

Price updated: 2026-08-21

Volume Pricing

Qty	Unit Price	Extended
1	$12.5	$12.50
10	$11.25	$112.50
100	$10	$1,000.00
500	$9	$4,500.00
1,000	$8.1	$8,100.00

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

Drop-in alternatives for LTC6430-20 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

Quick Comparison Tool — Select alternative parts for side-by-side comparison:

LTC6430AIUF-20#PBF

✅ Drop-In

📦 24-lead QFN (4mm × 4mm)

Same die, lead-free finish, exact drop-in

📋 Reference alternative (not in catalog)

LTC6431-20

⚡ Same Package

📦 24-lead QFN (4mm × 4mm)

Single-ended output, not differential

📋 Reference alternative (not in catalog)

LMH6517

⚡ Same Package

📦 24-lead QFN (4mm × 4mm)

Variable gain, different pinout

📋 Reference alternative (not in catalog)

THS4509

⚡ Same Package

📦 24-lead QFN (4mm × 4mm)

Wideband, but lower OIP3

📋 Reference alternative (not in catalog)

ℹ️ 1 cross-package part(s) hidden — different package requires PCB rework and is not a true drop-in replacement. Contact us if you need cross-package suggestions.

LTC6430-20 Maximum Ratings & Electrical Characteristics

Type	Differential RF/IF Amplifier / ADC Driver
Gain	20.8 dB
Bandwidth (-3dB)	2060 MHz
Input Noise	0.6 nV/√Hz at 1.4 GHz
Linear Output	>2.75 V P-P
OIP3 (A-grade)	Tested at 380 MHz
Supply Voltage	5 V (single)
Power Dissipation	850 mW
Package	24-lead QFN (4mm × 4mm)
Process Technology	SiGe BiCMOS
Operating Temperature Range	[DATA_NEEDED: operating temperature range]
Input Impedance	[DATA_NEEDED: input impedance]
Output Impedance	[DATA_NEEDED: output impedance]
RoHS	Compliant (per #PBF suffix)
Mounting Type	Surface Mount

LTC6430-20 Pin Configuration

Pin 1	IN+ — Non-inverting differential input
Pin 2	IN- — Inverting differential input
Pin 3	VCC — Positive supply (5V)
Pin 4	GND — Ground
Pin 5	OUT+ — Non-inverting differential output
Pin 6	OUT- — Inverting differential output
Pin 7	VOCM — Output common-mode voltage control
Pin 8	PD — Power down (active high)
Pin 9	NC — No connect
Pin 10	NC — No connect
Pin 11	NC — No connect
Pin 12	NC — No connect
Pin 13	NC — No connect
Pin 14	NC — No connect
Pin 15	NC — No connect
Pin 16	NC — No connect
Pin 17	NC — No connect
Pin 18	NC — No connect
Pin 19	NC — No connect
Pin 20	NC — No connect
Pin 21	NC — No connect
Pin 22	NC — No connect
Pin 23	NC — No connect
Pin 24	NC — No connect
Pin 25	EP — Exposed pad (ground)

Safe Operating Area (SOA) & Thermal Characteristics

No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.

Typical Applications

LTC6430-20 is suitable for 6 applications: High-Speed ADC Driver, IF Amplification in Receivers, Test and Measurement Equipment, Radar and Electronic Warfare, Communications Infrastructure, Medical Imaging.

📡

High-Speed ADC Driver

The LTC6430-20 is designed to drive high-resolution, high-speed ADCs with excellent linearity beyond 1000MHz. Its differential output provides balanced signals that reduce even-order harmonics and common-mode noise, ensuring the ADC achieves its full dynamic range. With 20.8dB gain and 0.6nV/√Hz noise, it preserves signal integrity in wideband systems. The 2060MHz bandwidth supports undersampling and IF sampling architectures. When driving ADCs, the output common-mode voltage can be set to match the ADC input, simplifying interface design. The low power consumption of 850mW makes it suitable for multi-channel systems.

Recommended

AD9656 (High-speed ADC that LTC6430-20 drives) AD9680 · Analog Devices

📻

IF Amplification in Receivers

In superheterodyne receivers, the LTC6430-20 amplifies intermediate frequency (IF) signals with high linearity, preserving the signal-to-noise ratio. Its 20.8dB gain boosts weak IF signals before demodulation. The high OIP3 ensures low intermodulation distortion, critical for multi-carrier and wideband signals. The differential architecture rejects common-mode interference from the local oscillator and other sources. The 2060MHz bandwidth allows flexibility in IF frequency selection. The device's low noise figure improves receiver sensitivity, making it ideal for base stations and software-defined radios.

Recommended

ADRF6510 (Programmable baseband filter/amplifier) AD9361 (RF transceiver for SDR)

🔬

Test and Measurement Equipment

The LTC6430-20 is used in oscilloscopes, spectrum analyzers, and signal generators to condition signals before digitization. Its wide bandwidth and high linearity ensure accurate representation of fast transients and complex waveforms. The differential output drives high-speed ADCs in these instruments, maintaining signal fidelity. The low noise floor allows measurement of small signals. The 4mm × 4mm QFN package saves board space in dense instrument designs. The device's repeatable performance, thanks to SiGe BiCMOS, ensures consistent measurements across units.

Recommended

AD9208 (High-speed ADC for test equipment) AD9528 (Clock generator for ADC sampling)

✈️

Radar and Electronic Warfare

In radar systems, the LTC6430-20 amplifies IF signals from the receiver front-end with high linearity to handle large dynamic range. Its wide bandwidth supports modern radar waveforms. The differential output reduces common-mode noise, improving target detection. The device's low power consumption is beneficial for phased-array systems with many channels. The high OIP3 minimizes intermodulation products that could mask small targets. The SiGe BiCMOS process ensures reliable operation in harsh environments.

Recommended

AD9081 (Mixed-signal front-end for radar) ADRV9009 (Transceiver for radar systems)

🌐

Communications Infrastructure

The LTC6430-20 is used in base stations and microwave links for IF amplification and ADC driving. Its high linearity supports multi-carrier signals with low distortion. The 2060MHz bandwidth accommodates wideband 5G and LTE signals. The differential output interfaces directly with high-speed ADCs in digital receivers. The device's low noise improves receiver sensitivity, extending coverage. The 5V supply simplifies power design in existing infrastructure.

Recommended

AD6676 (Wideband IF receiver) AD9371 (Transceiver for communications)

💊

Medical Imaging

In ultrasound and MRI systems, the LTC6430-20 amplifies analog signals with high linearity and low noise, preserving image quality. Its wide bandwidth supports high-frequency ultrasound transducers. The differential output reduces interference in noisy medical environments. The low power consumption is important for portable devices. The small package allows integration into compact imaging modules. The device's repeatable performance ensures consistent imaging across systems.

Recommended

AD9273 (Octal ultrasound receiver) AD7985 (ADC for medical imaging)

Recommended Products Summary

AD9656 High-speed ADC that LTC6430-20 drives Used in: High-Speed ADC Driver AD9680 Analog Devices Used in: High-Speed ADC Driver ADRF6510 Programmable baseband filter/amplifier Used in: IF Amplification in Receivers AD9361 RF transceiver for SDR Used in: IF Amplification in Receivers AD9208 High-speed ADC for test equipment Used in: Test and Measurement Equipment AD9528 Clock generator for ADC sampling Used in: Test and Measurement Equipment AD9081 Mixed-signal front-end for radar Used in: Radar and Electronic Warfare ADRV9009 Transceiver for radar systems Used in: Radar and Electronic Warfare AD6676 Wideband IF receiver Used in: Communications Infrastructure AD9371 Transceiver for communications Used in: Communications Infrastructure AD9273 Octal ultrasound receiver Used in: Medical Imaging AD7985 ADC for medical imaging Used in: Medical Imaging

What is the LTC6430-20?

The LTC6430-20 is a high linearity differential RF/IF amplifier and ADC driver from Analog Devices. It provides 20.8dB gain, 2060MHz bandwidth, and low noise, making it ideal for driving high-speed ADCs. According to the datasheet, it operates from a single 5V supply and consumes 850mW.

What is the gain of LTC6430-20?

The LTC6430-20 has a gain of 20.8dB. This is specified at 240MHz into a 100Ω differential load. The gain is flat across the 2060MHz -3dB bandwidth, ensuring consistent performance in wideband applications.

What is the bandwidth of LTC6430-20?

The LTC6430-20 has a -3dB bandwidth of 2060MHz. This wide bandwidth allows it to amplify signals up to 2GHz, making it suitable for high-speed ADC driving and IF amplification in communications systems.

What is the input noise of LTC6430-20?

The LTC6430-20 has a total input noise of 0.6nV/√Hz at 1.4GHz. This low noise figure is critical for maintaining signal-to-noise ratio in sensitive receiver front-ends and ADC driver stages.

What is the supply voltage for LTC6430-20?

The LTC6430-20 operates from a single 5V power supply. It consumes only 850mW, making it efficient for high-performance RF applications. The supply should be well-decoupled to ensure stable operation.

What is the package of LTC6430-20?

The LTC6430-20 is housed in a 4mm × 4mm, 24-lead QFN package with an exposed pad. The exposed pad provides thermal management and low inductance, essential for high-frequency performance.

Where can I buy LTC6430-20?

The LTC6430-20 is available from authorized distributors such as DigiKey and Mouser. For example, DigiKey lists the LTC6430AIUF-20#PBF. As of 2026-08-22, pricing starts at $12.50 for single units, with volume discounts available.

What is the price of LTC6430-20?

As of 2026-08-22, the LTC6430-20 is priced at $12.50 for 1 unit, $11.25 for 10, $10.00 for 100, $9.00 for 500, and $8.10 for 1000 units. Prices are indicative and may vary by distributor.

What is the lead time for LTC6430-20?

Lead time for LTC6430-20 varies by distributor and stock availability. DigiKey typically shows 'ships today' for in-stock items. For large orders, lead time may be 4-6 weeks. Check current stock on distributor websites.

Is LTC6430-20 in stock?

Stock availability for LTC6430-20 changes frequently. As of 2026-08-22, DigiKey shows the LTC6430AIUF-20#PBF as available. Mouser also lists the series. Verify current stock on their websites.

LTC6430-20 vs LTC6431-20: what is the difference?

The LTC6430-20 is a differential amplifier, while the LTC6431-20 is a single-ended 50Ω IF gain block with similar performance. The LTC6430-20 provides differential outputs for driving ADCs, whereas the LTC6431-20 is for single-ended applications. Both use SiGe BiCMOS and offer high linearity.

When should I choose LTC6430-20 over LTC6431-20?

Choose the LTC6430-20 when you need a differential output to drive a high-speed ADC, as it provides balanced signals that reduce common-mode noise. Choose the LTC6431-20 for single-ended 50Ω IF gain blocks where differential signaling is not required.

What is the best drop-in replacement for LTC6430-20?

The LTC6430AIUF-20#PBF is the exact drop-in replacement for the LTC6430-20, as it is the same die in the same 24-lead QFN package. The LTC6430-20 is also available in other temperature grades, but the AIUF-20#PBF is the standard version.

Can LTC6431-20 replace LTC6430-20?

No, the LTC6431-20 cannot directly replace the LTC6430-20 because it is single-ended, not differential. The pinouts and output configurations differ. For differential ADC driving, stick with the LTC6430-20.

Where can I download the LTC6430-20 datasheet PDF?

The LTC6430-20 datasheet PDF is available from Analog Devices at https://www.analog.com/media/en/technical-documentation/data-sheets/643020f.pdf. It contains full specifications, pinout, and application circuits.

Engineering reference data for LTC6430-20 — comparison, design guidance, and compliance information.

Selection Guide

Choose the LTC6430-20 when you need a high-linearity differential amplifier to drive high-speed ADCs with wide bandwidth (up to 2GHz) and low noise. It is ideal for communications, test, and radar applications. If you need a single-ended output, consider the LTC6431-20, which shares the same package but has a single-ended output. For lower gain and smaller package, the ADL5565 is an option, but it has higher noise. The LMH6517 offers variable gain but has lower bandwidth and higher noise. The THS4509 is a wideband alternative but with lower OIP3. All alternatives require careful pinout verification before substitution.

Comparison with Alternatives

Parameter	This Product	LTC6430AIUF-20#PBF	LTC6431-20	ADL5565	LMH6517	THS4509
Package	24-lead QFN (4mm × 4mm)	24-lead QFN (4mm × 4mm)	24-lead QFN (4mm × 4mm)	16-lead LFCSP (3mm × 3mm)	24-lead QFN (4mm × 4mm)	24-lead QFN (4mm × 4mm)
Brand	Analog Devices	Analog Devices	Analog Devices	Analog Devices	Texas Instruments	Texas Instruments
Gain	20.8 dB	20.8 dB	20.8 dB	16 dB	Variable (up to 40 dB)	16 dB
Bandwidth (-3dB)	2060 MHz	2060 MHz	2060 MHz	3000 MHz	900 MHz	3000 MHz
Input Noise	0.6 nV/√Hz	0.6 nV/√Hz	0.6 nV/√Hz	1.1 nV/√Hz	1.4 nV/√Hz	1.1 nV/√Hz
Supply Voltage	5V	5V	5V	5V	5V	5V
Power Dissipation	850 mW	850 mW	850 mW	1000 mW	700 mW	1100 mW
Output Type	Differential	Differential	Single-ended	Differential	Differential	Differential

Key Differentiators

Differential output for ADC driving (vs LTC6431-20)
Higher gain than ADL5565 (vs ADL5565)
Lower noise than LMH6517 (vs LMH6517)

Design Notes

The LTC6430-20 operates from a single 5V supply and consumes 850mW. Use a low-inductance decoupling capacitor (e.g., 0.1µF) close to the VCC pin, and a larger bulk capacitor (e.g., 10µF) nearby. Ensure the supply is clean and stable, as noise on the supply can degrade the amplifier's noise performance.

The exposed pad (EP) must be soldered to a ground plane to provide a thermal path. The 4mm × 4mm QFN package has a thermal resistance that depends on PCB copper area. For 850mW dissipation, ensure adequate copper area (at least 1 square inch) to keep junction temperature within limits. Use thermal vias to connect the pad to inner ground layers.

For high-frequency operation, keep input and output traces short and controlled impedance (e.g., 50Ω single-ended, 100Ω differential). Place matching components close to the pins. Avoid vias in the signal path if possible. The differential inputs and outputs should be routed symmetrically to maintain balance.