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Analog Devices Inc. LTC5569IUF#TRPBF
- Part No.:
- LTC5569IUF#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Mixers
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
LTC5569IUF#TRPBF.pdf
- Description:
- IC MIXER 300MHZ-4GHZ DWN 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,820
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Product details
Overview
LTC5569IUF#TRPBF from Analog Devices (formerly Linear Technology) is a dual active downconverting mixer IC optimized for diversity and MIMO receiver systems. It operates from 300MHz to 4GHz RF, supports 350MHz–4.5GHz LO, delivers 2dB typical conversion gain at 1950MHz, achieves 26.8dBm IIP3, and features independent enable pins (ENA/ENB) for power-gated channel control in wireless infrastructure receivers.
For engineers reviewing the LTC5569IUF#TRPBF datasheet, LTC5569IUF#TRPBF pinout, LTC5569IUF#TRPBF application, or LTC5569IUF#TRPBF equivalent, key selection criteria include its 16-lead 4mm × 4mm QFN package, dual-channel isolation >44dB, low 11.7dB noise figure at 1950MHz, and support for both high-side and low-side LO injection in compact RF front-end designs.
Technical Context
The LTC5569IUF#TRPBF integrates two symmetric, double-balanced active mixers sharing a common LO input but with independent RF inputs (RFA/RFB) and differential IF outputs (IFA±/IFB±). Each channel includes an integrated LO buffer amplifier, active mixer core, and bias circuit with dedicated enable pin (ENA/ENB), enabling independent channel activation without degrading LO match.
Its RF inputs are internally matched to 50Ω from 1.4–3.3GHz using on-die transformers; external matching extends operation to 300MHz–4GHz. The LO input maintains >12dB return loss from 1–3.5GHz regardless of enable state, and differential IF outputs support up to 1.6GHz with 530Ω || 1.3pF impedance at 190MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Frequency Range | 300MHz to 4000MHz - supports cellular bands from 700MHz LTE up to 3.8GHz 5G NR n77/n78. |
| LO Frequency Range | 350MHz to 4500MHz - enables flexible high-side or low-side injection across sub-6GHz spectrum. |
| IF Output Frequency Range | DC to 1600MHz - allows direct sampling or IF VGA interfacing without image-reject filtering constraints. |
| Conversion Gain | 2.0dB typical at 1950MHz - eliminates need for post-mixer amplification in many diversity receiver chains. |
| IIP3 | 26.8dBm at 1950MHz - provides robust linearity against adjacent-channel interferers in dense RF environments. |
| Noise Figure | 11.7dB at 1950MHz - ensures high sensitivity in low-SNR base station and RRH applications. |
| Supply Current | 180mA total at 3.3V with both mixers enabled - enables low-power operation in thermally constrained remote radio units. |
| Channel Isolation | >44dB from 300–1000MHz - preserves signal integrity in dual-path MIMO and diversity architectures. |
Pinout & Package
Package: 16-lead (4mm × 4mm) plastic QFN (UF) with exposed thermal pad (Pin 17 = GND), rated for –40°C to +105°C case temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RFA (Pin 1) | RF Input A | Single-ended 50Ω-matched RF port for Channel A; requires DC-blocking capacitor if source has DC offset. |
| RFB (Pin 4) | RF Input B | Single-ended 50Ω-matched RF port for Channel B; electrically isolated from RFA with >44dB channel-to-channel isolation. |
| ENA (Pin 12) | Enable A | CMOS-compatible digital control (≥2.5V = enabled); internal pull-down ensures safe default-off state. |
| ENB (Pin 9) | Enable B | Independent digital control for Channel B; allows dynamic power scaling per antenna path. |
| LO (Pin 11) | Local Oscillator Input | Shared single-ended 50Ω LO port; maintains impedance match even when one or both mixers are disabled. |
| IFA+, IFA– (Pins 15, 14) | Differential IF Output A | Open-collector outputs requiring external biasing (e.g., via 180nH inductors at 190MHz) for 50Ω single-ended IF conversion. |
| IFB+, IFB– (Pins 6, 7) | Differential IF Output B | Matched differential output pair with identical impedance (530Ω || 1.3pF at 190MHz) and timing characteristics as Channel A. |
| VCCA, VCCB (Pins 13, 8) | Supply A/B | Separate 3.3V supply pins per channel; decoupling required locally to minimize crosstalk and supply noise coupling. |
| BIASA, BIASB (Pins 16, 5) | Mixer Bias Adjustment | Open-circuit by default; allows fine-tuning of DC current and linearity trade-offs in production calibration. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable control | ENA/ENB pins allow per-channel power gating with <1µs turn-on/off time, reducing system-level power by up to 50% during idle periods. |
| LO input stability across modes | LO return loss >12dB maintained from 1–3.5GHz whether zero, one, or both mixers are enabled-eliminates need for LO switching or re-matching. |
| Wideband RF input matching | Internal transformer-based RF interface supports 300–4000MHz with only simple external capacitors (e.g., 2.7pF series), minimizing BOM count and layout area. |
| High channel isolation | 44dB+ channel-to-channel isolation prevents cross-talk between diversity/MIMO paths, preserving spatial multiplexing gain and SINR. |
| Low-noise, high-linearity balance | 11.7dB NF and 26.8dBm IIP3 at 1950MHz meet stringent 3GPP receiver requirements for Category 6+ LTE and 5G FR1 base stations. |
| Thermally robust QFN package | 4mm × 4mm exposed-pad QFN with θJC = 8°C/W enables reliable operation at 105°C case temperature in outdoor RRH enclosures. |
Applications
| Wireless Infrastructure Diversity Receivers | MIMO Infrastructure Receivers |
|---|---|
Use Scenario: Dual-antenna LTE/5G base station receiver using antenna diversity to mitigate fading in urban macrocells. IC Role / Device Role / Timing Role: Dual-channel downconverting mixer providing simultaneous RF-to-IF translation for two independent receive paths with coherent LO distribution. Use Value: Enables real-time selection of strongest signal path while maintaining <0.5° phase error between channels-critical for RAKE receiver performance. | Use Scenario: 4×4 MIMO massive-MIMO active antenna unit (AAU) requiring four parallel RF front-ends in minimal PCB area. IC Role / Device Role / Timing Role: Two LTC5569IUF#TRPBF devices provide four synchronized downconversion channels with shared LO routing and matched group delay. Use Value: Reduces component count by 33% versus discrete single-channel mixers, cutting bill-of-materials cost and improving channel-to-channel amplitude/phase tracking. |
| Remote Radio Units (RRUs) | Small Cell Base Stations |
Use Scenario: Outdoor 5G NR remote radio unit deployed on utility poles with strict thermal and power envelopes. IC Role / Device Role / Timing Role: Dual mixer handling primary and diversity receive chains with independent ENA/ENB control for adaptive power management. Use Value: 600mW total power consumption and 105°C-rated package allow fanless operation in sealed IP65 enclosures without derating. | Use Scenario: Indoor femtocell supporting multi-user MIMO with simultaneous uplink/downlink processing. IC Role / Device Role / Timing Role: Provides low-noise, high-dynamic-range IF outputs for dual ADCs feeding baseband processors in compact form factors. Use Value: 1.6GHz IF bandwidth supports wide instantaneous bandwidths (e.g., 100MHz 5G NR carriers) without image folding or aliasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual downconverting mixer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HMC1040LP4ME | Higher 28.5dBm IIP3 but wider 24-lead 4×4mm QFN; no independent enable pins; requires external LO splitters. | Preferred for ultra-high-linearity macrocell applications where board space permits larger footprint and external LO distribution. | Select HMC1040LP4ME when IIP3 >27.5dBm is mandatory and per-channel enable is not required. |
| MAX19997AETX+ | Lower 24.5dBm IIP3 and 13.5dB NF; 20-lead TQFN; integrated LO buffers but no channel isolation spec >40dB. | Suitable for cost-sensitive small cells where moderate linearity suffices and channel crosstalk is less critical. | Choose MAX19997AETX+ for budget-constrained deployments where 24dBm IIP3 meets link budget requirements. |
Compared with HMC1040LP4ME and MAX19997AETX+, the LTC5569IUF#TRPBF uniquely balances 26.8dBm IIP3, 11.7dB NF, and independent channel enable in a compact 16-pin QFN-making it optimal for thermally constrained, power-aware diversity and MIMO receivers requiring precise channel control.
Availability
LTC5569IUF#TRPBF is available at Aetrix Electronics and suitable for wireless infrastructure diversity receivers, MIMO infrastructure receivers, and remote radio units requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for LTC5569IUF#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. (ADI) is a global leader in high-performance analog, mixed-signal, and RF ICs, formed through the acquisition of Linear Technology in 2017.
The LTC5569IUF#TRPBF belongs to ADI's high-frequency mixer product line, designed specifically for next-generation wireless infrastructure applications demanding low power, small size, and dual-channel coherence in 5G, LTE-A, and WiMAX base stations.
FAQ
What is the operating temperature range for the LTC5569IUF#TRPBF?
The LTC5569IUF#TRPBF is specified for a case temperature range of –40°C to +105°C, validated per Absolute Maximum Ratings and DC Electrical Characteristics tables in the official datasheet. This rating applies to the exposed pad (Pin 17) soldered to the PCB ground plane, ensuring reliability in outdoor remote radio units and thermally demanding base station enclosures. Thermal resistance θJC is 8°C/W.
Does the LTC5569IUF#TRPBF support both high-side and low-side LO injection?
Yes, the LTC5569IUF#TRPBF supports both high-side and low-side LO injection across its full 350MHz–4.5GHz LO range. Performance data-including conversion gain, IIP3, and noise figure-is characterized for both configurations (e.g., RF = 1950MHz with LO = 1760MHz for low-side, or RF = 850MHz with LO = 1040MHz for high-side), enabling flexible frequency planning in FDD and TDD systems without hardware changes.
How is LO input matching maintained when one mixer is disabled?
The LTC5569IUF#TRPBF maintains LO input return loss >12dB from 1–3.5GHz regardless of enable state-whether both mixers are enabled, only one is enabled, or both are disabled-as confirmed in Figure 7 of the datasheet. This is achieved through LO buffer design that isolates input impedance from mixer enable logic, eliminating need for external LO switching or re-matching in dynamic channel allocation schemes.
What external components are required for basic 190MHz IF operation with the LTC5569IUF#TRPBF?
For standard 190MHz bandpass IF operation, the LTC5569IUF#TRPBF requires: 2.7pF series capacitors on RFA/RFB inputs; 3.9pF capacitor on LO input; 180nH inductors (L1/L3) on IFA+/IFA– and IFB+/IFB– outputs; and 8:1 IF transformers (e.g., Mini-Circuits TC8-1-10LN+) to convert differential IF to 50Ω single-ended. These values are tabulated in Figure 1 and Table 4 of the datasheet.
Can the LTC5569IUF#TRPBF be used below 300MHz RF or above 4GHz RF?
Yes-the LTC5569IUF#TRPBF's RF input architecture supports operation down to 300MHz and up to 4GHz with appropriate external matching. Below 300MHz, series inductors (e.g., 270nH) are added to RFA/RFB per Figure 1; above 4GHz, shunt capacitance adjustments optimize match. Measured RF return loss curves (Figure 4) confirm usable performance from 350MHz to 3900MHz, and datasheet AC specs extend to 4000MHz.
LTC5569IUF#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- RF Type:
- General Purpose
- Frequency:
- 300MHz ~ 4GHz
- Number of Mixers:
- 2
- Gain:
- 2dB
- Noise Figure:
- 11.7dB
- Secondary Attributes:
- Down Converter
- Current - Supply:
- 180mA
- Voltage - Supply:
- 3.3V
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (4x4)
LTC5569IUF#TRPBF FAQ
1.How can I place an order for LTC5569IUF#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC5569IUF#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 LTC5569IUF#TRPBF reliable?
The price and inventory of LTC5569IUF#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC5569IUF#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC5569IUF#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC5569IUF#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC5569IUF#TRPBF?
LTC5569IUF#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC5569IUF#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 LTC5569IUF#TRPBF?
For technical support, including LTC5569IUF#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC5569IUF#TRPBF requirements.
6.How does Aetrix verify that LTC5569IUF#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC5569IUF#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 LTC5569IUF#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC5569IUF#TRPBF?
All LTC5569IUF#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC5569IUF#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 LTC5569IUF#TRPBF part is unused and in its original packaging.
Return procedure for LTC5569IUF#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC5569IUF#TRPBF Tags
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ADEX-10+
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ADE-2+
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ADE-1ASK+
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ADE-1L+
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