LTC6400CUD-20#PBF Analog Devices Integrated Circuit (Quad Flat No-Lead) In Stock
Analog Devices LTC6400CUD-20#PBF is a 3 GHz low-noise, low-distortion differential amplifier with 20 dB gain, 65 dB CMRR, and 2 mV maximum input offset voltage in a 16-pad QFN package. It is optimized for driving high-speed ADCs and signal conditioning in RF and communications systems. Available from authorized distributors worldwide.
- Manufacturer
- Analog Devices
- Package
- Quad Flat No-Lead
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- LTC6400CUD-20#PBF Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LTC6400CUD-20#PBF?
- 3 GHz bandwidth with fixed 20 dB gain provides high-speed signal amplification for ADC driving in wireless receiver chains
- 65 dB common-mode rejection ratio suppresses noise and interference in differential signal paths at GHz frequencies
- Low-noise and low-distortion topology maintains signal integrity for 14-bit and 16-bit ADC front-ends
- 16-pad QFN package minimizes parasitic inductance critical for 3 GHz signal routing on high-speed PCBs
What is LTC6400CUD-20#PBF used for?
The LTC6400CUD-20#PBF is designed for high-speed ADC driving in wireless base station receivers, software-defined radio (SDR) front-ends, and wideband test equipment operating up to 3 GHz. Its differential architecture with 65 dB CMRR effectively rejects common-mode noise injected by power supplies and ground planes in RF-intensive PCB environments. The device is also used in medical imaging signal chains, high-speed data acquisition systems, and radar IF amplifier stages requiring low distortion at 100–500 MHz intermediate frequencies.
What are the specifications of LTC6400CUD-20#PBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1691 |
| YTEOL | 0 |
| Amplifier Type | OPERATIONAL AMPLIFIER |
| Common-mode Reject Ratio-Nom | 65dB |
| Input Offset Voltage-Max | 2000 µV |
| JESD-30 Code | S-PQCC-N16 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Slew Rate-Nom | 0.0045V/us |
| Supply Voltage Limit-Max | 3.6V |
| Supply Voltage-Nom (Vsup) | 3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Where can I find the LTC6400CUD-20#PBF datasheet?
LTC6400CUD-20#PBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LTC6400CUD-20#PBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What bandwidth and gain does the LTC6400CUD-20#PBF provide for ADC front-end designs?
The LTC6400CUD-20#PBF provides a fixed gain of 20 dB with a -3 dB bandwidth of 3 GHz. This makes it suitable for driving 14-bit and 16-bit high-speed ADCs sampling at 250 MSPS to 1 GSPS, where the amplifier must maintain flat frequency response and low noise figure across the ADC's Nyquist band of 125–500 MHz.
How does the 65 dB CMRR specification benefit a differential receiver circuit at high frequencies?
With a 65 dB common-mode rejection ratio, the LTC6400CUD-20#PBF attenuates common-mode interference — such as power supply ripple at 100 kHz or ground bounce at switching frequencies — by a factor of over 1700:1. In a PCB environment where digital switching noise can couple onto differential RF traces, this rejection maintains signal-to-noise ratio in the ADC input chain without requiring extra filtering at 3 GHz frequencies.
Which RF or IF frequency bands is the LTC6400CUD-20#PBF best suited for in a wireless receiver?
The 3 GHz bandwidth covers LTE band IF stages at 70–200 MHz, 5G sub-6 GHz signal conditioning, S-band radar at 2–4 GHz, and Wi-Fi 2.4 GHz receiver chains. The 20 dB fixed gain is particularly well matched to IF amplifier stages between a mixer output (typically -20 dBm) and an ADC input requiring 0 dBm to +5 dBm full-scale levels.
What PCB layout considerations apply to the LTC6400CUD-20#PBF in a 3 GHz signal path?
The 16-pad QFN package (approximately 4 mm x 4 mm) minimizes bond-wire inductance compared to leaded packages, which is critical at 3 GHz where even 1 nH of inductance causes a 63-ohm reactance. Designers should use 50-ohm differential traces with matched-length routing, place 100 nF and 10 nF decoupling capacitors within 0.5 mm of the supply pins, and avoid vias in the high-speed signal path beneath the device.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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