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Analog Devices Inc. LTC6433BIUF-15#TRPBF
- Part No.:
- LTC6433BIUF-15#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
LTC6433BIUF-15#TRPBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,185
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Product details
Overview
LTC6433BIUF-15#TRPBF from Analog Devices (formerly Linear Technology) is a high-linearity, single-ended 50Ω IF gain block amplifier operating from 100kHz to 1.4GHz. It delivers 15.9dB power gain, 47dBm OIP3 at 150MHz, 3.22dB noise figure, and >2VP-P linear output swing on a single 5V supply drawing 95mA. It is used in wideband ADC driver, CATV, and test equipment signal chains where flat gain and low distortion are critical.
For engineers reviewing the LTC6433BIUF-15#TRPBF datasheet, LTC6433BIUF-15#TRPBF pinout, LTC6433BIUF-15#TRPBF application, or LTC6433BIUF-15#TRPBF equivalent, key selection criteria include its B-grade OIP3 performance at 150MHz, internal 50Ω input/output matching, thermal diode monitoring capability, and QFN-24 package with exposed ground pad for RF stability and thermal management.
Technical Context
The LTC6433BIUF-15#TRPBF employs a SiGe BiCMOS process with Darlington-pair input and shunt-series feedback architecture to simultaneously achieve low noise, high linearity, and wide bandwidth. Its internally compensated bias network maintains optimal operating point across temperature and supply variation.
It uses an open-collector output topology with external RF choke biasing, enabling high RF power delivery without collector resistor loss. Input and output are de-embedded to package pins with 1µF FDBK capacitor, supporting flat gain from 100kHz to 1GHz on a single demo circuit (DC2168A).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 15.9dB typical at 150MHz - provides fixed, predictable signal amplification without external tuning |
| OIP3 (B-grade) | 47dBm at 150MHz - enables handling of strong interferers in crowded RF environments |
| Noise Figure | 3.22dB at 150MHz - preserves SNR in sensitive receiver front-ends and ADC drivers |
| Bandwidth | DC–2GHz –3dB BW (low-frequency cutoff user-defined) - supports multi-decade IF and broadband applications |
| Supply | Single 5V (4.75–5.25V), 95mA total current - simplifies power design with minimal decoupling |
| Input/Output | Internally matched to 50Ω - eliminates need for discrete matching networks in 50Ω systems |
| Package | 24-lead 4mm × 4mm QFN with exposed GND pad - ensures low-inductance grounding and thermal dissipation |
Pinout & Package
Package: 24-lead (4mm × 4mm) plastic QFN with exposed pad (Pin 25 = GND). Requires soldering exposed pad to PCB ground plane via multiple vias for RF stability and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (24) | RF Input | Internally biased at 2V DC; requires external DC blocking capacitor; 50Ω matched |
| OUT (18) | RF Output | Open-collector output; requires external RF choke and DC blocking capacitor |
| VCC (9, 22) | Positive Supply | Two internally connected 5V supply pins; each requires local 1000pF + 0.1µF bypass |
| GND (8, 17, 23, 25) | Ground | Multiple ground connections including exposed pad; all must connect to low-inductance PCB ground plane |
| FDBK (19) | Feedback Node | Connects to OUT via external capacitor (typically 1µF) to stabilize low-frequency gain and matching |
| NFILT (6) | Noise Filter | Connects to GND via capacitor (1µF typical) to suppress low-frequency noise |
| T_DIODE (15) | Temperature Monitor | Forward-biased diode (1mA) providing voltage proportional to die temperature (0.85V typ, 1.4mV/°C) |
| DNC (1–5, 7, 10–14, 16, 20, 21) | No Connect | Must remain unconnected and floating; connection may impair RF performance or stability |
Key Features
| Feature | Design Value |
|---|---|
| Internally matched 50Ω I/O | Eliminates external matching components, reducing BOM count and layout sensitivity in 50Ω systems |
| A-Grade 100% OIP3 tested at 150MHz | B-grade variant (LTC6433BIUF-15) offers verified linearity performance without full A-grade screening cost |
| On-chip bias & temp compensation | Maintains stable gain and linearity over –40°C to 85°C case temperature without external calibration |
| Exposed thermal pad (Pin 25) | Enables <44°C/W junction-to-case thermal resistance for reliable operation at 475mW DC power |
| Unconditionally stable | No external stability networks required across full 100kHz–1.4GHz band when used per recommended layout |
Applications
| ADC Driver | CATV Signal Distribution |
|---|---|
Use Scenario: Driving high-speed analog-to-digital converters in wideband receivers requiring low noise and high SFDR. IC Role / Device Role / Timing Role: Single-ended IF amplifier placed between filter and ADC input to boost signal level while preserving dynamic range. Use Value: 3.22dB NF and 47dBm OIP3 at 150MHz enable >75dB SFDR in 14-bit ADC systems without additional gain stages. | Use Scenario: Amplifying downstream DOCSIS signals in node and hub equipment operating up to 1.2GHz. IC Role / Device Role / Timing Role: Fixed-gain distribution amplifier in 75Ω-coupled CATV infrastructure, adapted via external matching. Use Value: S11 < –10dB to 1.2GHz and >2VP-P linear swing support multi-channel signal integrity in dense spectral environments. |
| Test & Measurement Front-End | Wideband Spectrum Analyzer IF Chain |
Use Scenario: Intermediate frequency amplification in portable spectrum analyzers needing flat response and low distortion. IC Role / Device Role / Timing Role: Gain block in swept-tuned or real-time IF path, following mixer and preceding digitization. Use Value: 13-octave flat gain (100kHz–1GHz) on DC2168A demo board reduces calibration complexity and improves amplitude accuracy. | Use Scenario: Signal conditioning in digital downconverters for real-time spectrum analysis up to 1GHz. IC Role / Device Role / Timing Role: Wideband IF amplifier after quadrature demodulator, before baseband filtering and sampling. Use Value: 15.9dB gain with <0.5dB ripple and –91dBc IM3 at 2dBm/tone enables clean baseband reconstruction without image artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar IF amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6401IRGET | DC–4.5GHz bandwidth, 20dB gain, higher 125mA supply current, no integrated temp diode | Supports higher-frequency IF and baseband; lacks internal 50Ω matching - requires external matching networks | Select when >1.4GHz bandwidth or DC coupling is required; accept added layout complexity and power overhead |
| ADL5523ACPZ-R7 | 0.04–4GHz bandwidth, 16dB gain, 4.8dB NF, 5V/70mA, 6-pin SOT-363 package | Smaller footprint and lower power; lower OIP3 (42dBm @ 150MHz) and no temp monitoring or FDBK pin | Select for space-constrained, lower-distortion-critical apps where thermal monitoring and ultra-flat gain are secondary |
Compared with LMH6401IRGET and ADL5523ACPZ-R7, the LTC6433BIUF-15#TRPBF uniquely combines guaranteed B-grade OIP3, internal 50Ω matching, thermal diode, and 100kHz–1GHz flat gain in a thermally robust QFN-making it optimal for production IF chains demanding repeatability and minimal external components.
Availability
LTC6433BIUF-15#TRPBF is available at Aetrix Electronics and suitable for ADC driver, CATV infrastructure, and test equipment applications requiring stable component supply, consistent RF performance across temperature, and long-term manufacturability.
Supply support for LTC6433BIUF-15#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 acquired Linear Technology in 2017 and maintains its high-performance analog and RF product lines with rigorous characterization and application support.
The LTC6433-15 belongs to Linear's precision RF gain block family, designed specifically for wideband IF signal chains where linearity, noise, and ease-of-use outweigh raw bandwidth or ultra-low power.
FAQ
What is the guaranteed OIP3 performance of the LTC6433BIUF-15#TRPBF at 150MHz?
The LTC6433BIUF-15#TRPBF is the B-grade variant and guarantees 47dBm OIP3 at 150MHz under standard test conditions (POUT = 2dBm/tone, Δf = 1MHz). This is confirmed in the AC Electrical Characteristics table on page 4 of the official datasheet, with A-grade devices specified at 47.2dBm minimum. The B-grade offers validated linearity at reduced cost for applications where margin above 47dBm is not required.
Does the LTC6433BIUF-15#TRPBF require external input/output matching networks?
No, the LTC6433BIUF-15#TRPBF does not require external input/output matching networks. It is internally matched to 50Ω at both input (Pin 24) and output (Pin 18), as explicitly stated in the Features and Applications Information sections. External DC blocking capacitors and an RF choke at the output are required, but impedance transformation networks are unnecessary in standard 50Ω systems.
How is the low-frequency cutoff defined for the LTC6433BIUF-15#TRPBF?
The low-frequency cutoff of the LTC6433BIUF-15#TRPBF is user-defined via external components: the FDBK capacitor (Pin 19 to OUT) sets low-frequency gain roll-off, and the input DC blocking capacitor determines the lowest usable frequency. As noted in the Description section, "users can define the low frequency cut-off by appropriate choice of external components," with 1µF typically enabling operation down to 100kHz.
What is the purpose of the T_DIODE pin (Pin 15) on the LTC6433BIUF-15#TRPBF?
The T_DIODE pin (Pin 15) on the LTC6433BIUF-15#TRPBF provides an on-chip temperature-sensing diode. When forward-biased with 1mA current, it yields a voltage of 0.85V typical with a temperature coefficient of 1.4mV/°C. This allows real-time die temperature monitoring for thermal derating or system-level thermal management without adding external sensors.
Can the LTC6433BIUF-15#TRPBF operate from a supply voltage other than 5V?
The LTC6433BIUF-15#TRPBF is characterized and specified for operation from a single 5V supply (4.75V to 5.25V range). While the Absolute Maximum Ratings allow up to 5.5V, the AC and DC electrical characteristics-including gain, OIP3, and noise figure-are only guaranteed within the 4.75–5.25V range. Operation outside this window may degrade linearity or stability and is not supported by datasheet specifications.
LTC6433BIUF-15#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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)
LTC6433BIUF-15#TRPBF FAQ
1.How can I place an order for LTC6433BIUF-15#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6433BIUF-15#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 LTC6433BIUF-15#TRPBF reliable?
The price and inventory of LTC6433BIUF-15#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6433BIUF-15#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC6433BIUF-15#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6433BIUF-15#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6433BIUF-15#TRPBF?
LTC6433BIUF-15#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6433BIUF-15#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 LTC6433BIUF-15#TRPBF?
For technical support, including LTC6433BIUF-15#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6433BIUF-15#TRPBF requirements.
6.How does Aetrix verify that LTC6433BIUF-15#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6433BIUF-15#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 LTC6433BIUF-15#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC6433BIUF-15#TRPBF?
All LTC6433BIUF-15#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6433BIUF-15#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 LTC6433BIUF-15#TRPBF part is unused and in its original packaging.
Return procedure for LTC6433BIUF-15#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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