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Analog Devices Inc. LTC6433AIUF-15#PBF
- Part No.:
- LTC6433AIUF-15#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
LTC6433AIUF-15#PBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:335
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Product details
Overview
LTC6433AIUF-15#PBF from Analog Devices (formerly Linear Technology) is a high-linearity, single-ended 50Ω IF gain block amplifier optimized for 100kHz–1GHz signal chain applications. It delivers 15.9dB power gain, 47dBm OIP3 at 150MHz, 3.22dB noise figure, >2VP-P linear output swing, and operates from a single 5V supply drawing 95mA. It serves as an ADC driver or broadband RF/IF amplifier in test equipment and CATV infrastructure.
For engineers reviewing the LTC6433AIUF-15#PBF datasheet, LTC6433AIUF-15#PBF pinout, LTC6433AIUF-15#PBF application, or LTC6433AIUF-15#PBF equivalent, key selection criteria include its A-grade 100% OIP3-tested performance at 150MHz, internally matched 50Ω I/O, user-defined low-frequency cutoff via external components, and thermal stability across –40°C to 85°C case temperature.
Technical Context
The LTC6433AIUF-15#PBF employs a SiGe BiCMOS process with on-chip bias and temperature compensation to maintain linearity and noise performance over environmental variation. Its core topology uses shunt-series feedback to simultaneously match input/output to 50Ω while minimizing Miller effect and enabling unconditional stability.
It features a Darlington-pair input stage for high current gain and impedance transformation, an open-collector output architecture powered via RF choke for high RF power handling, and internal DC biasing requiring only external DC blocking capacitors-eliminating discrete bias networks and matching circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Power Gain | 15.9dB at 150MHz - provides fixed, flat gain across 100kHz–1GHz without tuning |
| OIP3 | 47.2dBm at 150MHz (A-grade) - enables high dynamic range in multi-tone IF stages |
| Noise Figure | 3.22dB at 150MHz - supports low-noise amplification before ADCs or mixers |
| Input/Output Impedance | Internally matched to 50Ω - eliminates external matching networks for 50Ω systems |
| Supply | Single 5V supply, 95mA total current - simplifies power design; 475mW DC power dissipation |
| Bandwidth | DC–2GHz –3dB BW (low-frequency cutoff user-defined) - supports wideband IF and RF applications |
| Stability | Unconditionally stable - no external stabilization required across full operating frequency range |
Pinout & Package
The LTC6433AIUF-15#PBF is housed in a 24-lead 4mm × 4mm plastic QFN package with exposed pad (Pin 25), which must be soldered to PCB ground for thermal management and low-inductance RF grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (24) | Signal Input | Internally biased at 2V DC; requires DC blocking capacitor; 50Ω matched |
| OUT (18) | Amplifier Output | Open-collector output; requires RF choke + DC blocking capacitor; 50Ω matched |
| VCC (9, 22) | Positive Supply | Two internally connected pins; bypass with 1000pF (close) + 0.1µF capacitors |
| GND (8, 17, 23, 25) | Ground | Multiple ground connections including exposed pad; all must connect to low-inductance ground plane |
| NFILT (6) | Noise Filter Node | Connect capacitor to GND to suppress low-frequency noise |
| FDBK (19) | Feedback Terminal | Connect capacitor to OUT to extend low-frequency gain flatness and improve matching |
| T_DIODE (15) | Temperature Sensing Diode | Forward-biased at 1mA; voltage drop indicates die temperature (0.85V typ, 1.4mV/°C) |
| DNC (1–5, 7, 10–14, 16, 20, 21) | Do Not Connect | Must remain floating; connection may impair operation or stability |
Key Features
| Feature | Design Value |
|---|---|
| A-grade 100% OIP3 tested at 150MHz | Guarantees minimum 47dBm third-order intercept for high-linearity IF stages without binning |
| Internally 50Ω input/output matched | Eliminates external matching networks, reducing BOM count and layout sensitivity |
| User-defined low-frequency cutoff | Enables flexible system-level bandwidth control via external DC blocking and feedback capacitors |
| On-chip bias and temperature compensation | Maintains optimal operating point and linearity across –40°C to 85°C case temperature range |
| SiGe BiCMOS process | Delivers superior repeatability vs. GaAs alternatives and enables high gain-bandwidth product |
Applications
| ADC Driver | CATV Infrastructure |
|---|---|
Use Scenario: Driving high-speed analog-to-digital converters in wideband receivers requiring high SFDR and low noise. IC Role / Device Role / Timing Role: Single-ended IF amplifier placed between mixer and ADC input to boost signal level while preserving SNR and linearity. Use Value: 15.9dB gain and 3.22dB NF at 150MHz enable full-scale ADC utilization without front-end attenuation; >2VP-P swing avoids clipping at ADC input. | Use Scenario: Amplifying downstream IF signals in cable headend and node equipment operating up to 1GHz. IC Role / Device Role / Timing Role: Fixed-gain broadband amplifier in 50Ω CATV signal path, supporting DOCSIS-compliant channel stacking. Use Value: 47dBm OIP3 at 150MHz ensures minimal intermodulation distortion across dense multi-carrier spectra; S11 < –10dB to 1.2GHz minimizes reflections. |
| Test & Measurement Equipment | RF Signal Chain Front-End |
Use Scenario: Wideband gain block in spectrum analyzers, signal generators, and vector network analyzers requiring flat response and low distortion. IC Role / Device Role / Timing Role: Calibration-grade IF amplifier in modular instrument architectures where repeatability and thermal stability are critical. Use Value: SiGe BiCMOS process ensures unit-to-unit consistency; unconditionally stable operation eliminates need for per-unit tuning or isolation pads. | Use Scenario: Intermediate-stage amplification in software-defined radio (SDR) and radar front-ends covering HF through L-band. IC Role / Device Role / Timing Role: High-linearity, low-noise gain block between LNA and mixer or after image-reject filter in direct-conversion receivers. Use Value: 13-octave flat gain (100kHz–1GHz) from single demo circuit reduces design iterations; P1dB = 19.2dBm supports high-output drive capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar IF amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6401IRGET | Higher gain (20dB), wider bandwidth (DC–4.5GHz), but higher NF (6.6dB at 150MHz) and higher supply current (125mA) | Better suited for DC-coupled, ultra-wideband applications; less optimal for noise-sensitive IF stages below 1GHz | Select LMH6401IRGET when DC coupling and >2GHz bandwidth are required; LTC6433AIUF-15#PBF preferred for 100kHz–1GHz low-noise, low-power IF gain |
| ADL5523ACPZ-R7 | Lower gain (16.5dB), narrower bandwidth (400MHz–4GHz), higher OIP3 (48.5dBm at 1900MHz), but not specified below 400MHz | Optimized for cellular band RF amplification; lacks low-frequency support and user-defined LF cutoff | Select ADL5523ACPZ-R7 for 400MHz+ RF front-ends; LTC6433AIUF-15#PBF remains best-in-class for sub-1GHz IF gain blocks with LF flexibility |
Compared with LMH6401IRGET and ADL5523ACPZ-R7, the LTC6433AIUF-15#PBF uniquely balances low-noise (3.22dB NF), high-linearity (47dBm OIP3), and user-configurable low-frequency response in a thermally robust 4mm QFN-making it the optimal choice for precision IF amplification where 100kHz–1GHz coverage and thermal stability are essential.
Availability
LTC6433AIUF-15#PBF is available at Aetrix Electronics and suitable for test equipment, CATV infrastructure, and RF signal chain front-end designs requiring stable component supply, guaranteed A-grade linearity, and industrial temperature range support.
Supply support for LTC6433AIUF-15#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 its legacy of high-performance analog ICs for precision signal conditioning and RF applications.
The LTC6433AIUF-15#PBF belongs to the LTC6433 family of high-linearity, wideband gain blocks designed specifically for IF and baseband signal chain applications demanding low noise, high OIP3, and simplified layout in 50Ω systems.
FAQ
What is the operating temperature range for the LTC6433AIUF-15#PBF?
The LTC6433AIUF-15#PBF is rated for a case operating temperature range of –40°C to +85°C. This range is guaranteed for functional operation and full AC/DC specifications, including A-grade OIP3 testing at 150MHz. The junction temperature must not exceed 150°C, and thermal design must account for θJC = 44°C/W via the exposed pad.
Does the LTC6433AIUF-15#PBF require external matching networks?
No, the LTC6433AIUF-15#PBF does not require external matching networks. Its input and output are internally matched to 50Ω across 100kHz–1.2GHz (S11/S22 < –10dB), enabling direct integration into standard 50Ω test equipment and RF signal chains without discrete matching components.
How is low-frequency response controlled in the LTC6433AIUF-15#PBF?
Low-frequency response in the LTC6433AIUF-15#PBF is user-defined via external components: a DC blocking capacitor at IN sets the high-pass corner, while the FDBK–OUT feedback capacitor determines low-frequency gain flatness and matching. The device itself is not DC-coupled, and the cutoff can be tailored from ~100kHz upward using standard capacitor values.
What is the purpose of the T_DIODE pin on the LTC6433AIUF-15#PBF?
The T_DIODE pin (Pin 15) on the LTC6433AIUF-15#PBF provides on-die temperature monitoring. When forward-biased with 1mA, it yields a voltage of ~0.85V at 25°C with a temperature coefficient of 1.4mV/°C-enabling real-time die temperature estimation without external sensors.
Can the LTC6433AIUF-15#PBF operate from supplies other than 5V?
The LTC6433AIUF-15#PBF is specified for operation from 4.75V to 5.25V. While absolute maximum rating allows 5.5V, performance parameters-including OIP3, gain flatness, and noise figure-are guaranteed only within the 4.75V–5.25V range. Operation outside this window may degrade linearity or reliability and is not recommended for production designs.
LTC6433AIUF-15#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 2 GHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- -
- Current - Supply:
- 95mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 4.75 V
- Voltage - Supply Span (Max):
- 5.25 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (4x4)
LTC6433AIUF-15#PBF FAQ
1.How can I place an order for LTC6433AIUF-15#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6433AIUF-15#PBF 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 LTC6433AIUF-15#PBF reliable?
The price and inventory of LTC6433AIUF-15#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6433AIUF-15#PBF is usually 5 days.
3.What payment methods are accepted for LTC6433AIUF-15#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6433AIUF-15#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6433AIUF-15#PBF?
LTC6433AIUF-15#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6433AIUF-15#PBF 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 LTC6433AIUF-15#PBF?
For technical support, including LTC6433AIUF-15#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6433AIUF-15#PBF requirements.
6.How does Aetrix verify that LTC6433AIUF-15#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6433AIUF-15#PBF 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 LTC6433AIUF-15#PBF meets industry standards.
7.What is the process for return or replacement of LTC6433AIUF-15#PBF?
All LTC6433AIUF-15#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6433AIUF-15#PBF, 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 LTC6433AIUF-15#PBF part is unused and in its original packaging.
Return procedure for LTC6433AIUF-15#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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