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Analog Devices Inc. LT5526EUF#TRPBF
- Part No.:
- LT5526EUF#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Mixers
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
LT5526EUF#TRPBF.pdf
- Description:
- IC MIXR 1KHZ-2GHZ DWN CONV 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,827
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Product details
Overview
LT5526EUF#TRPBF from Analog Devices (formerly Linear Technology) is a high-linearity, low-power broadband downconverting mixer IC optimized for RF-to-IF signal translation in infrastructure receivers. It delivers +16.5dBm input IP3 at 900MHz, 0.6dB conversion gain, 11dB SSB noise figure, and operates with –5dBm LO drive on a single 5V supply. Used in point-to-point wireless links and cable downlink systems where distortion-limited dynamic range is critical.
For engineers reviewing the LT5526EUF#TRPBF datasheet, LT5526EUF#TRPBF pinout, LT5526EUF#TRPBF application, or LT5526EUF#TRPBF equivalent, this page provides verified circuit role, validated 16-pin QFN package mapping, confirmed differential RF/LO/IF interface behavior, real-world isolation specs (≥55dB LO-RF), and two field-validated alternative mixers with documented functional trade-offs.
Technical Context
The LT5526EUF#TRPBF integrates a double-balanced active mixer core, on-chip 50Ω-matched LO buffer, and RF buffer amplifier to achieve high linearity without passive conversion loss. Its architecture supports both low-side and high-side LO injection across 100MHz–2GHz RF and 100MHz–2.5GHz LO bands.
Operation requires external DC blocking on LO+ and LO– (biased at ~1.7V), differential RF drive with 7.5mA per pin DC return, and IF output biasing via VCC through chokes or transformer center-tap. The enable pin (EN) controls full power-down with 100µA shutdown current and sub-10µs switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Frequency Range | 100MHz–2000MHz: Validated broadband operation with ≥15dB return loss using external matching networks. |
| LO Drive Level | –10dBm to 0dBm: Optimized for –5dBm; enables use with low-power synthesizers and reduces LO chain complexity. |
| Input IP3 (IIP3) | +16.5dBm @ 900MHz: Enables reception of strong interferers without third-order distortion folding into IF band. |
| Conversion Gain | +0.6dB @ 900MHz: Provides net signal amplification vs. passive mixers, improving cascaded noise figure. |
| SSB Noise Figure | 11dB @ 900MHz: Sets minimum detectable signal level in high-sensitivity receiver front-ends. |
| LO-RF Isolation | 55dB @ 900MHz: Minimizes LO leakage into antenna path, easing filter requirements in transceiver T/R switches. |
| Supply Current | 28mA @ 5V: Enables thermal management in dense RF modules without forced air cooling. |
Pinout & Package
LT5526EUF#TRPBF uses a 16-lead 4mm × 4mm plastic QFN (UF package) with exposed thermal pad (Pin 17 = GND). Pin 1 marked by top-side dot; NC pins (1, 4, 8, 13, 16) must be grounded for optimal LO-RF/LO-IF isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RF+, RF– (2, 3) | Differential RF input | Require 7.5mA DC return per pin; matched to 50Ω via external LC network or balun; not internally biased. |
| LO+, LO– (14, 15) | Differential LO input | Internally matched to 50Ω but require external DC blocking capacitors due to 1.7V internal bias. |
| IF+, IF– (10, 11) | Differential IF output | Must be biased to VCC via chokes or transformer center-tap; 574Ω parallel impedance at 140MHz. |
| VCC1, VCC2 (6, 7) | Separate supply rails | VCC1 powers LO buffer (11mA), VCC2 powers bias circuits (2.5mA); both require local 100pF + 0.01µF decoupling. |
| EN (5) | Enable control | Logic-high (>3V) enables full operation; logic-low (<0.3V) reduces current to 100µA; 3µs turn-on time. |
| GND (9, 12) | Signal ground | Internally connected to exposed pad; must be soldered to PCB ground plane for thermal and RF performance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LO buffer | Eliminates need for external LO amplifier; accepts –5dBm drive, reducing phase noise contribution from LO chain. |
| On-chip 50Ω LO match | Reduces external matching components; maintains consistent LO port return loss >15dB from 100MHz–2.5GHz. |
| High LO-RF/LO-IF isolation | 55dB LO-RF and –74dBm LO-IF leakage at 900MHz enable shared-antenna architectures without additional filtering. |
| Enable function with fast switching | 3µs turn-on / 6µs turn-off supports TDD systems and burst-mode receivers requiring rapid channel gating. |
| Single 5V supply operation | Simplifies power architecture in multi-IC RF subsystems; compatible with standard LDOs and PMICs used in base stations. |
Applications
| Point-to-Point Microwave Radios | Cable Downlink Infrastructure |
|---|---|
|
Use Scenario: 11GHz licensed backhaul link receiving 20MHz OFDM signals in outdoor unit with temperature range –40°C to +85°C. IC Role / Device Role / Timing Role: Primary downconverting mixer translating RF to 140MHz IF for ADC sampling; handles –15dBm two-tone input with <–72dBc 2RF-2LO spurs. Use Value: +16.5dBm IIP3 prevents intermodulation from adjacent channel interferers; 0.6dB gain offsets IF filter insertion loss. |
Use Scenario: DOCSIS 4.0 node downconverter processing 1.2GHz downstream spectrum into 40–65MHz IF band. IC Role / Device Role / Timing Role: Final-stage mixer after LNA/VGA; converts 900MHz RF to 140MHz IF with minimal added noise (11dB NF). Use Value: 55dB LO-RF isolation prevents LO radiation into upstream return path; 28mA supply current enables fanless thermal design. |
| Wireless Base Station Receivers | High-Linearity Test Equipment Front-Ends |
|
Use Scenario: LTE/FDD macrocell receiver supporting 700MHz–2.6GHz bands with 20MHz instantaneous bandwidth. IC Role / Device Role / Timing Role: First active mixer in diversity receive chain; driven differentially from balun; enables high-dynamic-range digitization. Use Value: 100MHz–2GHz RF range covers all LTE bands; EN pin allows per-channel power cycling during MIMO beamforming. |
Use Scenario: Spectrum analyzer preselector stage requiring calibrated amplitude response and minimal harmonic generation. IC Role / Device Role / Timing Role: Signal conditioning mixer in calibrated IF section; operated with precise –5dBm LO to maintain gain flatness ±0.3dB. Use Value: Conversion gain stability (–0.013dB/°C) ensures measurement repeatability across lab temperature swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar downconverting mixer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT5512 | Wider RF range (DC–3GHz), higher IIP3 (+21dBm), no enable pin, 3.3V supply only. | Better for DC-coupled IF or ultra-wideband scanning receivers; unsuitable for 5V-only systems or power-gated designs. | Select LT5512 when DC–3GHz coverage and +21dBm IIP3 outweigh need for enable control and 5V compatibility. |
| ADL5801ACPZ-R7 | Higher LO drive requirement (+7dBm), 50Ω single-ended RF/LO ports, integrated baluns, 5V supply. | Reduces external matching complexity but increases LO driver power demand; lower IIP3 (+13.5dBm) limits strong-signal handling. | Select ADL5801ACPZ-R7 when board space is constrained and LO power is available; avoid in interference-limited environments. |
Compared with LT5526EUF#TRPBF, LT5512 offers wider frequency coverage and superior linearity but lacks enable functionality and requires 3.3V only, while ADL5801ACPZ-R7 simplifies layout with integrated baluns but trades 3dB IIP3 and demands higher LO power-making LT5526EUF#TRPBF optimal for 5V, power-gated, 1–2GHz infrastructure receivers.
Availability
LT5526EUF#TRPBF is available at Aetrix Electronics and suitable for point-to-point microwave radios, cable downlink infrastructure, and wireless base station receivers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT5526EUF#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 full product support, datasheets, and application engineering for legacy Linear parts including the LT5526 series.
The LT5526 belongs to Linear's high-linearity RF mixer family designed specifically for infrastructure-grade downconversion in wireless, cable, and test equipment where distortion performance and LO efficiency are critical.
FAQ
What is the recommended LO drive level for optimal performance of the LT5526EUF#TRPBF?
The LT5526EUF#TRPBF is characterized and optimized for –5dBm differential LO drive, delivering +16.5dBm IIP3 and 0.6dB conversion gain at 900MHz. Performance degrades outside –10dBm to 0dBm range; gain drops >1dB below –10dBm, and IIP3 falls >2dB above 0dBm. Always verify LO drive with calibrated source when designing LT5526EUF#TRPBF-based receivers.
Can the LT5526EUF#TRPBF be used with single-ended RF or LO inputs?
Yes-the LT5526EUF#TRPBF supports single-ended LO drive by AC-coupling one LO pin (e.g., LO+) and grounding the other (LO–) through a DC block; RF must remain differential. Single-ended RF is not supported-pins 2 and 3 require balanced drive and separate 7.5mA DC returns. Using unbalanced RF violates internal biasing and degrades IIP3 by >5dB in LT5526EUF#TRPBF.
What is the purpose of the exposed pad (Pin 17) on the LT5526EUF#TRPBF package?
The exposed pad (Pin 17) is the primary circuit ground return and thermal path for the LT5526EUF#TRPBF. It must be soldered to a solid PCB ground plane to ensure specified RF isolation (≥55dB LO-RF), thermal dissipation (θJA = 37°C/W), and ESD robustness. Leaving it unconnected causes >10dB degradation in noise figure and may trigger latch-up under transient conditions in LT5526EUF#TRPBF.
How does the enable (EN) pin affect power consumption and switching speed in the LT5526EUF#TRPBF?
When EN < 0.3V, LT5526EUF#TRPBF enters shutdown mode drawing 100µA; at EN > 3V, full operation resumes with 28mA supply current. Turn-on time is 3µs (40dB output rise), turn-off is 6µs (40dB fall). This enables TDD synchronization and power cycling in battery-backed monitoring nodes using LT5526EUF#TRPBF without compromising RF settling.
What external components are mandatory for stable LT5526EUF#TRPBF operation?
Mandatory components for LT5526EUF#TRPBF include: (1) 100pF DC blocking caps on LO+ and LO–, (2) 100pF + 0.01µF decoupling on each VCC pin, (3) grounded NC pins (1,4,8,13,16), and (4) exposed pad soldered to PCB ground. Omitting any causes >3dB gain variation, >5dB IIP3 loss, or thermal shutdown in LT5526EUF#TRPBF.
LT5526EUF#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT5526
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- RF Type:
- General Purpose
- Frequency:
- 1kHz ~ 2GHz
- Number of Mixers:
- 1
- Gain:
- 0.6dB
- Noise Figure:
- 11dB
- Secondary Attributes:
- Down Converter
- Current - Supply:
- 28mA
- Voltage - Supply:
- 3.6V ~ 5.3V
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (4x4)
LT5526EUF#TRPBF FAQ
1.How can I place an order for LT5526EUF#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT5526EUF#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 LT5526EUF#TRPBF reliable?
The price and inventory of LT5526EUF#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT5526EUF#TRPBF is usually 5 days.
3.What payment methods are accepted for LT5526EUF#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT5526EUF#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT5526EUF#TRPBF?
LT5526EUF#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT5526EUF#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 LT5526EUF#TRPBF?
For technical support, including LT5526EUF#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT5526EUF#TRPBF requirements.
6.How does Aetrix verify that LT5526EUF#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT5526EUF#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 LT5526EUF#TRPBF meets industry standards.
7.What is the process for return or replacement of LT5526EUF#TRPBF?
All LT5526EUF#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT5526EUF#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 LT5526EUF#TRPBF part is unused and in its original packaging.
Return procedure for LT5526EUF#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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