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Analog Devices Inc. LT5519EUF#TRPBF
- Part No.:
- LT5519EUF#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Mixers
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
LT5519EUF#TRPBF.pdf
- Description:
- IC MIXER 700MHZ-1.4GHZ UP 16QFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LT5519EUF#TRPBF from Analog Devices (formerly Linear Technology) is a high-linearity, upconverting double-balanced mixer IC designed for wireless and cable infrastructure transmitters. It operates with RF output from 700MHz to 1400MHz, delivers +17.1dBm typical input IP3 at 1GHz, features on-chip 50Ω-matched LO/RF ports and integrated RF output transformer, and supports single-ended LO/RF operation in a compact 16-lead QFN package.
For engineers reviewing the LT5519EUF#TRPBF datasheet, LT5519EUF#TRPBF pinout, LT5519EUF#TRPBF application, or LT5519EUF#TRPBF equivalent, key selection criteria include its 13.6dB noise figure, –44dBm typical LO-to-RF leakage, 5V single-supply operation, enable-controlled shutdown with 1µA off-state current, and wide IF input range (1MHz–400MHz) enabling flexible baseband-to-RF upconversion in broadband transmission systems.
Technical Context
The LT5519EUF#TRPBF integrates a high-speed double-balanced mixer core driven by an internally matched 50Ω LO buffer capable of accepting –5dBm differential drive. Its RF output stage employs an on-chip 4:1 transformer to deliver a broadband 50Ω single-ended output without external matching components.
IF inputs are differential and require external 100Ω termination to ground for proper biasing and LO leakage suppression; LO and RF ports support single-ended use via grounded complementary pins, while internal resistive matching ensures >17dB LO return loss across 300–1800MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Output Frequency Range | 700MHz to 1400MHz - enables direct upconversion for LTE Band 12/13/17/28 and WiMAX 2.3/2.5GHz infrastructure front-ends when paired with appropriate LO. |
| Input IP3 (IIP3) | +17.1dBm at 1GHz - ensures robust linearity in multi-carrier wireless transmitters where intermodulation distortion must be minimized. |
| Noise Figure | 13.6dB (SSB) - defines minimum detectable signal level in receiver-side evaluation configurations or low-noise upconversion paths. |
| LO to RF Leakage | –44dBm typical - reduces unwanted LO feedthrough into power amplifier stages, easing filtering requirements in transmit chains. |
| Conversion Gain | –0.6dB - indicates near-unity signal transfer efficiency, minimizing need for additional IF gain stages before mixing. |
| Supply Voltage | 4.5V to 5.25V - compatible with standard 5V system rails; eliminates need for dedicated low-noise LDOs in mixed-signal infrastructure boards. |
| Enable Turn-On Time | 2µs - supports fast TDD frame switching in time-division duplexed base stations and point-to-point radios. |
| IF Input Range | 1MHz to 400MHz - accommodates baseband I/Q signals from zero-IF modulators or IF-staged architectures up to 200MHz bandwidth. |
Pinout & Package
LT5519EUF#TRPBF is housed in a 16-lead (4mm × 4mm) plastic QFN package with exposed thermal pad (Pin 17) that must be soldered to PCB ground for thermal and RF performance. Pin pitch is 0.65mm; package conforms to JEDEC MO-220 WGGC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 5) | Enable control input | Logic-high (>3V) activates mixer; logic-low (<0.5V) reduces supply current to 1µA - enables power-gating in burst-mode transmitters. |
| VCC1 (Pin 6) | Bias circuit supply | Powers internal bias networks; draws ~2mA - requires local 10pF RF bypass for stability. |
| VCC2 (Pin 7) | LO buffer supply | Powers high-speed LO amplifier; draws ~22mA - needs 5pF + 1000pF parallel bypass per datasheet layout. |
| VCC3 (Pin 8) | Mixer core supply | Powers active mixer quad; draws ~36mA - must be fed through 39nH RF choke to isolate LO noise from supply rail. |
| IF+, IF– (Pins 2,3) | Differential IF input | Emitter-coupled inputs requiring 100Ω DC termination to ground per side - sets 18mA core current and controls LO leakage. |
| LO+, LO– (Pins 14,15) | Differential LO input | Internally 50Ω-matched; single-ended drive possible by grounding LO– - eliminates external matching for 300–1800MHz LO sources. |
| RF+, RF– (Pins 10,11) | Differential RF output | Transformer-coupled outputs; single-ended RF achieved by grounding RF– - delivers 50Ω output impedance from 700–1400MHz without external components. |
| GND (Pins 1,4,9,12,13,16) | Internal ground connections | Multiple low-inductance ground paths for isolation - must connect to low-impedance PCB ground plane to maintain RF performance. |
| Exposed Pad (Pin 17) | Thermal & RF ground | Primary DC/RF return path for entire IC - mandatory solder connection to PCB ground plane for thermal dissipation and EMI control. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip RF output transformer | Eliminates discrete balun or matching network at RF output, reducing BOM count, board area, and production variation in 700–1400MHz transmit paths. |
| Integrated 50Ω-matched LO and RF ports | Enables direct interface with 50Ω test equipment and RF ICs without external matching, simplifying validation and reducing layout sensitivity. |
| Single-ended LO and RF operation | Supports cost-effective single-ended LO synthesizers and PA driver stages without differential amplifiers or transformers. |
| Low LO-to-RF leakage (–44dBm) | Minimizes spurious emissions in adjacent channels, relaxing filter requirements before power amplifiers in FDD/TDD base station designs. |
| Enable function with 1µA shutdown current | Allows dynamic power management in multi-channel transceivers or battery-backed remote units without compromising RF integrity during sleep. |
| Wide IF frequency range (1–400MHz) | Supports both zero-IF I/Q modulators and IF-staged architectures, enabling reuse across multiple wireless standards including LTE, WiMAX, and private radio. |
Applications
| Wireless Infrastructure Transmitter | Cable Downlink Infrastructure |
|---|---|
Use Scenario: LTE macrocell and small-cell base station transmit chain upconverting baseband I/Q signals to 700–960MHz or 1710–2170MHz bands. IC Role / Device Role / Timing Role: Upconverting mixer converting IF input (e.g., 140MHz) to RF output (e.g., 1000MHz) using high-side or low-side LO injection. Use Value: +17.1dBm IIP3 and 13.6dB noise figure ensure clean spectral emission and high ACLR compliance without cascaded gain stages. | Use Scenario: DOCSIS 3.1/4.0 cable modem headend transmitting downstream QAM signals in 54–1002MHz band. IC Role / Device Role / Timing Role: Final-stage upconverter translating 40–200MHz IF to RF output between 750–1002MHz for fiber node distribution. Use Value: On-chip RF transformer and 50Ω port matching eliminate external baluns, reducing insertion loss and group delay variation across channelized spectrum. |
| Point-to-Point Microwave Radio | High-Linearity Test Equipment |
Use Scenario: 5–6GHz licensed microwave link transmitter using image-reject architecture with IF at 100–400MHz. IC Role / Device Role / Timing Role: High-linearity upconverter generating RF output from 5.2–5.9GHz using 4.8–5.5GHz LO and 400MHz IF. Use Value: 2µs enable turn-on time supports rapid channel hopping and TDD guard interval timing in adaptive modulation links. | Use Scenario: Vector signal generator or RF test set synthesizing calibrated upconverted waveforms for device characterization. IC Role / Device Role / Timing Role: Precision upconversion stage delivering repeatable amplitude/phase response across 700–1400MHz with minimal LO feedthrough. Use Value: –44dBm LO-to-RF leakage and <0.1dB gain flatness enable accurate EVM and ACPR measurements without post-correction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar upconverting mixer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT5520 | Lower IIP3 (+15.9dBm), same 50Ω-matched single-ended RF/LO ports, no integrated LO buffer - requires external LO amplifier. | Suitable for lower-power or cost-sensitive transmitters where +15.9dBm IIP3 suffices; lacks internal LO drive capability. | Select LT5520 only if external LO amplification is already present and IIP3 margin >1.2dB is acceptable. |
| LT5511 | Wider RF range (up to 3GHz), higher IIP3 (+17dBm), integrated LO buffer - but larger 24-lead QFN package and higher supply current (90mA). | Better suited for multi-band infrastructure covering 1.7–3GHz; less optimal for compact 700–1400MHz-only designs due to size and power. | Choose LT5511 when extending beyond 1400MHz or needing higher RF output power handling; avoid if board space or 70mA current budget is constrained. |
Compared with LT5519EUF#TRPBF, LT5520 trades 1.2dB IIP3 and integrated LO drive for smaller footprint and lower cost, while LT5511 extends RF range and maintains IIP3 at the expense of larger package and +20mA supply current - making LT5519EUF#TRPBF the optimal balance for 700–1400MHz infrastructure upconversion with minimal external components.
Availability
LT5519EUF#TRPBF is available at Aetrix Electronics and suitable for wireless infrastructure transmitters, cable downlink systems, point-to-point microwave radios, and high-linearity RF test equipment requiring stable component supply across extended temperature ranges (–40°C to 85°C).
Supply support for LT5519EUF#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and RF ICs, serving communications, industrial, automotive, and instrumentation markets with precision signal processing solutions.
The LT5519EUF#TRPBF belongs to Linear Technology's high-linearity RF mixer product line, engineered specifically for demanding wireless infrastructure upconversion where low distortion, low LO leakage, and simplified RF layout are critical design objectives.
FAQ
What is the operating temperature range for the LT5519EUF#TRPBF?
The LT5519EUF#TRPBF is specified for operation from –40°C to +85°C ambient temperature. Its junction temperature is rated to 125°C, and thermal performance relies on proper soldering of the exposed pad (Pin 17) to a PCB ground plane. All electrical specifications in the datasheet are assured across this full industrial temperature range via design correlation and statistical process control.
Does the LT5519EUF#TRPBF require external matching components at the RF output?
No, the LT5519EUF#TRPBF does not require external matching components at the RF output due to its integrated on-chip 4:1 RF transformer, which provides a broadband 50Ω impedance match from 700MHz to 1400MHz. This eliminates discrete baluns or matching networks, reducing bill-of-materials count and layout sensitivity in infrastructure transmitter designs.
Can the LT5519EUF#TRPBF operate with a single-ended LO source?
Yes, the LT5519EUF#TRPBF supports single-ended LO operation: drive the LO+ pin with the LO signal and connect LO– to a low-impedance ground. Its internal 50Ω resistive match across LO+ and LO– enables this configuration without external components, simplifying integration with common single-ended LO synthesizers and VCOs.
What is the recommended IF input termination for the LT5519EUF#TRPBF?
The LT5519EUF#TRPBF requires 100Ω resistors (0.1% tolerance recommended) connected from IF+ and IF– to ground to establish proper DC bias current (~18mA per side) and minimize LO-to-RF leakage. These resistors must be well-matched and placed symmetrically; DC blocking capacitors are mandatory at the IF input to prevent interaction between the differential ports.
How does the enable function affect power consumption in the LT5519EUF#TRPBF?
When enabled (EN > 3V), the LT5519EUF#TRPBF draws 60–70mA total supply current. When disabled (EN < 0.5V), it enters shutdown mode drawing only 1–100µA, reducing system power in idle states. The 2µs turn-on and 6µs turn-off times support fast TDD frame switching in time-division duplexed infrastructure radios without disrupting timing integrity.
LT5519EUF#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT5519
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- RF Type:
- General Purpose
- Frequency:
- 700MHz ~ 1.4GHz
- Number of Mixers:
- 1
- Gain:
- -0.6dB
- Noise Figure:
- 13.6dB
- Secondary Attributes:
- Up Converter
- Current - Supply:
- 70mA
- Voltage - Supply:
- 4.5V ~ 5.25V
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (4x4)
LT5519EUF#TRPBF FAQ
1.How can I place an order for LT5519EUF#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT5519EUF#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 LT5519EUF#TRPBF reliable?
The price and inventory of LT5519EUF#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT5519EUF#TRPBF is usually 5 days.
3.What payment methods are accepted for LT5519EUF#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT5519EUF#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT5519EUF#TRPBF?
LT5519EUF#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT5519EUF#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 LT5519EUF#TRPBF?
For technical support, including LT5519EUF#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT5519EUF#TRPBF requirements.
6.How does Aetrix verify that LT5519EUF#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT5519EUF#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 LT5519EUF#TRPBF meets industry standards.
7.What is the process for return or replacement of LT5519EUF#TRPBF?
All LT5519EUF#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT5519EUF#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 LT5519EUF#TRPBF part is unused and in its original packaging.
Return procedure for LT5519EUF#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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