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Analog Devices Inc. LTC5556IUH#TRPBF
- Part No.:
- LTC5556IUH#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Mixers
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC5556IUH#TRPBF.pdf
- Description:
- 1.5GHZ TO 7GHZ DUAL PROGRAMMABLE
- Quantity:
- Payment:
- Shipping:
Inventory:4,036
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Product details
Overview
LTC5556IUH#TRPBF from Analog Devices is a dual-channel, programmable-gain downconverting mixer optimized for 3GHz–7GHz RF input and 1MHz–900MHz IF output, delivering 9dB power conversion gain, 32dBm output IP3, and 15.5dB IF DVGA range in 0.5dB steps via SPI. It enables precise gain control in diversity/MIMO receivers for 4G/5G base stations and DAS.
For engineers reviewing the LTC5556IUH#TRPBF datasheet, LTC5556IUH#TRPBF pinout, LTC5556IUH#TRPBF application, or LTC5556IUH#TRPBF equivalent, this device supports fast channel enable/disable (0.3µs turn-on), reduced-power mode, wide temperature operation (–40°C to 105°C), and dual 32-lead QFN packaging with exposed thermal pad.
Technical Context
The LTC5556IUH#TRPBF integrates two independent active mixers and digital variable-gain amplifiers (DVGA) per channel, each with dedicated EN1/EN2 enable pins and shared RP pin for global reduced-power mode. LO inputs (LO+, LO–) accept differential or single-ended drive with >9dB return loss across 500MHz–8GHz.
Each channel features open-collector differential IF outputs (MO1±, MO2±) and buffered differential IF outputs (IF1±, IF2±), with internal 200Ω || 1pF impedance matching up to 1GHz. The SPI interface (CSB/CLK/SDI/SDO) operates at up to 20MHz and defines logic levels via VDD (1.6V–3.6V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Frequency Range | 1.5GHz to 7GHz - supports LTE-U (5.1–5.9GHz), 4G/5G bands, and satellite uplinks with external matching networks. |
| IF Frequency Range | 1MHz to 900MHz - enables direct sampling of wideband IF signals without additional frequency translation stages. |
| Conversion Gain | Up to +9dB at 0dB IF attenuation - provides high signal integrity in low-noise receiver front-ends. |
| Output IP3 | 32dBm typical - ensures robust linearity against strong interferers in dense RF environments like DAS and MIMO base stations. |
| IF Gain Control | 15.5dB range in 0.5dB steps via SPI - allows fine-grained dynamic range management for AGC loops. |
| Supply Current | 380mA (both channels, full power) - enables predictable power budgeting in multi-channel RF systems. |
| Operating Temperature | –40°C to 105°C case temperature - qualified for outdoor infrastructure and industrial-grade wireless equipment. |
Pinout & Package
32-lead (5mm × 5mm) plastic QFN package with exposed thermal pad (Pin 33 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RF1, RF2 (Pins 2, 7) | Single-ended RF inputs | Internally biased to VCC/2; require DC-blocking capacitors for AC coupling into diversity/MIMO antenna paths. |
| LO+, LO– (Pins 20, 21) | Differential LO input | 50Ω internally matched; accepts single-ended or differential LO drive; ESD-protected with series DC-blocking required if LO source has DC offset. |
| MO1±, MO2± (Pins 10, 11, 30, 31) | Differential mixer outputs | Open-collector; require pull-up inductors to VCC; deliver raw mixer IF output before DVGA stage (28mA typical DC current). |
| IF1±, IF2± (Pins 17, 18, 23, 24) | Differential IF buffer outputs | Open-collector; require pull-up inductors to VCC; provide post-DVGA IF signal (47mA typical DC current). |
| EN1, EN2 (Pins 13, 28) | Channel enable inputs | CMOS logic high enables respective channel; internal 330kΩ pull-down ensures safe shutdown when unconnected. |
| RP (Pin 19) | Global reduced-power select | Logic high forces both channels into reduced-power mode regardless of SPI setting; internal 330kΩ pull-down defaults to full power. |
| VCC1, VCC2 (Pins 29, 12) | Channel power supplies | 3.3V regulated supply per channel; bypass capacitors required near pins to maintain RF stability. |
| VDD (Pin 22) | SPI logic supply | 1.6V–3.6V supply defining SPI logic thresholds; decoupling critical for noise immunity in high-speed serial communication. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent mixer/DVGA channels | Enables simultaneous processing of two RF streams in MIMO/diversity receivers without cross-talk or shared resource contention. |
| 0.5dB IF gain resolution via SPI | Supports precise AGC implementation with <±0.04dB gain error at 270MHz, minimizing quantization-induced distortion in closed-loop systems. |
| Fast enable/disable (0.3µs turn-on) | Allows time-synchronized channel activation in TDD-based 5G NR frame structures and burst-mode receivers. |
| Reduced-power mode | Cuts supply current by ~25% per channel while maintaining functional IF bandwidth and gain control-ideal for power-constrained remote radio units. |
| Wide IF bandwidth (up to 900MHz) | Eliminates need for intermediate IF filtering or translation stages in broadband receivers targeting 5G FR1 and satellite services. |
| High channel-to-channel isolation (>38dB) | Prevents inter-channel leakage in dual-polarized or spatially separated antenna configurations used in massive MIMO deployments. |
Applications
| 4G/5G Massive MIMO Base Stations | Distributed Antenna Systems (DAS) |
|---|---|
Use Scenario: Dual-polarized antenna arrays in macrocell base stations process concurrent uplink signals across multiple RF chains. IC Role / Device Role / Timing Role: Downconverts 3.5GHz/4.9GHz 5G NR carriers to baseband-compatible IF while enabling per-chain gain calibration via SPI. Use Value: 15.5dB programmable IF gain range and <±0.04dB gain matching reduce calibration overhead and improve EVM consistency across 64+ antenna elements. |
Use Scenario: Centralized RF hub distributes and processes signals from dozens of remote antenna nodes in stadiums or airports. IC Role / Device Role / Timing Role: Acts as dual-channel downconverter in head-end unit, translating diverse cellular bands (700MHz–3.8GHz) to common IF for digitization. Use Value: 1.5–7GHz RF coverage and 900MHz IF bandwidth support multi-band DAS aggregation without hardware reconfiguration. |
| 5.1–5.9GHz LTE-U/Wi-Fi Coexistence Receivers | Fixed Satellite Service Ground Terminals |
Use Scenario: Indoor small cells operating in unlicensed 5GHz spectrum must reject adjacent Wi-Fi interference while receiving LTE-U signals. IC Role / Device Role / Timing Role: Provides high linearity (32dBm OIP3) and >43dB RF-to-LO isolation to suppress out-of-band blockers during simultaneous transmit/receive. Use Value: 24.2dBm IIP3 at 15dB IF attenuation maintains SNR under +5dBm co-channel blockers, enabling reliable LTE-U operation in congested ISM bands. |
Use Scenario: Outdoor VSAT terminals receive C-band (3.4–4.2GHz) or Ku-band (10.7–12.75GHz) downlinks using harmonic mixing or image-reject architectures. IC Role / Device Role / Timing Role: Downconverts first IF (e.g., 1.2GHz) to lower IF (e.g., 270MHz) with minimal phase error (<5.1° over 15.5dB gain range) for coherent demodulation. Use Value: <3.6° IF phase error at 250MHz ensures stable carrier recovery in QPSK/8PSK modems, reducing BER in rain-faded links. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel downconverting mixer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC5566IUH#TRPBF | Optimized for 300MHz–4.5GHz RF range and 500MHz max IF; lacks 900MHz IF bandwidth and higher RF upper limit. | Better suited for sub-3GHz cellular infrastructure (LTE FDD, NB-IoT); not viable for 5G FR1 above 3.8GHz or LTE-U. | Select LTC5556IUH#TRPBF when RF band extends beyond 4.5GHz or IF bandwidth exceeds 500MHz; choose LTC5566IUH#TRPBF for cost-sensitive sub-3GHz designs. |
| ADL5375-05ACPZ-R7 | Single-channel quadrature modulator (not mixer); no IF DVGA; requires external IF amplification and digital gain control. | Designed for transmit path (I/Q modulation), not receive path; incompatible with downconversion or SPI-programmable IF gain. | LTC5556IUH#TRPBF is not functionally substitutable with ADL5375-05ACPZ-R7 due to fundamental architecture mismatch-use only in receive-side applications requiring dual-channel downconversion and integrated IF gain control. |
Compared with LTC5566IUH#TRPBF, the LTC5556IUH#TRPBF delivers 2.5GHz higher RF upper limit and 400MHz wider IF bandwidth-critical for 5G NR and LTE-U. Unlike ADL5375-05ACPZ-R7, it is a true dual-channel downconverter with on-chip IF gain control, eliminating external VGA components and reducing BOM count by ≥3 per channel.
Availability
LTC5556IUH#TRPBF is available at Aetrix Electronics and suitable for 4G/5G base station development, distributed antenna system integration, and satellite ground terminal manufacturing requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LTC5556IUH#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, serving communications, industrial, automotive, and aerospace markets with precision signal processing solutions.
The LTC5556IUH#TRPBF belongs to ADI's high-frequency mixer product line, designed specifically for next-generation wireless infrastructure requiring wideband, dual-channel, digitally programmable downconversion with minimal external components.
FAQ
What is the RF frequency range supported by the LTC5556IUH#TRPBF?
The LTC5556IUH#TRPBF supports an RF input frequency range of 1.5GHz to 7GHz, with optimal performance between 3GHz and 7GHz. External matching networks are required outside the 2.6–6.4GHz band, and operation down to 1.5GHz or up to 8GHz is possible with degraded specifications such as reduced conversion gain and increased noise figure.
How does the SPI interface configure gain on the LTC5556IUH#TRPBF?
The LTC5556IUH#TRPBF uses a 16-bit SPI register to program IF gain in 0.5dB steps across a 15.5dB range. CSB, CLK, and SDI pins control data loading, while SDO provides readback capability. VDD (1.6V–3.6V) sets logic thresholds, and the interface supports up to 20MHz clock rates for rapid AGC loop response.
Can the LTC5556IUH#TRPBF operate with a single-ended LO input?
Yes, the LTC5556IUH#TRPBF accepts both single-ended and differential LO drive on LO+ and LO– pins. Each pin is internally matched to 50Ω and includes ESD protection diodes to ground, so DC-blocking capacitors are required only if the LO source has DC voltage present.
What is the purpose of the RP pin on the LTC5556IUH#TRPBF?
The RP (Reduced Power) pin on the LTC5556IUH#TRPBF provides hardware-level override of the SPI-programmed power mode. A logic high forces both channels into reduced-power mode regardless of register settings, while a logic low allows SPI control. An internal 330kΩ pull-down resistor defaults RP to low, ensuring full-power operation at power-up.
Does the LTC5556IUH#TRPBF require external IF filtering before the DVGA stage?
No, the LTC5556IUH#TRPBF does not require external IF filtering before the DVGA stage because its IF inputs (AI1±, AI2±) and outputs (IF1±, IF2±, MO1±, MO2±) are specified for operation up to 900MHz with 200Ω || 1pF impedance. However, bandpass filtering may be added after the IF buffer to suppress harmonics or out-of-band noise depending on system-level requirements.
LTC5556IUH#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- RF Type:
- General Purpose
- Frequency:
- 1.5GHz ~ 7GHz
- Number of Mixers:
- 2
- Gain:
- 9.7dB
- Noise Figure:
- 13.9dB
- Secondary Attributes:
- Down Converter
- Current - Supply:
- 380mA
- Voltage - Supply:
- 3V ~ 3.6V
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (5x5)
LTC5556IUH#TRPBF FAQ
1.How can I place an order for LTC5556IUH#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC5556IUH#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 LTC5556IUH#TRPBF reliable?
The price and inventory of LTC5556IUH#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC5556IUH#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC5556IUH#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC5556IUH#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC5556IUH#TRPBF?
LTC5556IUH#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC5556IUH#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 LTC5556IUH#TRPBF?
For technical support, including LTC5556IUH#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC5556IUH#TRPBF requirements.
6.How does Aetrix verify that LTC5556IUH#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC5556IUH#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 LTC5556IUH#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC5556IUH#TRPBF?
All LTC5556IUH#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC5556IUH#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 LTC5556IUH#TRPBF part is unused and in its original packaging.
Return procedure for LTC5556IUH#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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