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Analog Devices Inc. LTC5556IUH#PBF
- Part No.:
- LTC5556IUH#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Mixers
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC5556IUH#PBF.pdf
- Description:
- 1.5GHZ TO 7GHZ DUAL PROGRAMMABLE
- Quantity:
- Payment:
- Shipping:
Inventory:2,230
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Product details
Overview
LTC5556IUH#PBF 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-ideal for 4G/5G MIMO receiver front-ends with precise channel gain matching.
For engineers reviewing the LTC5556IUH#PBF datasheet, LTC5556IUH#PBF pinout, LTC5556IUH#PBF application, or LTC5556IUH#PBF equivalent, key selection criteria include RF frequency coverage (1.5–7GHz), IF bandwidth support up to 900MHz, SPI-controlled 0.5dB gain resolution, dual-channel isolation (>38dB), and operation across –40°C to 105°C with 3.3V single supply.
Technical Context
The LTC5556IUH#PBF integrates two independent active mixers with integrated differential IF VGAs, each controlled via a 16-bit SPI interface supporting 0.5dB gain steps over 15.5dB range. LO input accepts single-ended or differential drive (500MHz–8GHz), while RF inputs are single-ended (1.5GHz–7GHz) with internal biasing requiring DC-blocking capacitors.
Each channel features dedicated enable pins (EN1/EN2) enabling sub-microsecond turn-on/off, plus a global reduced-power mode pin (RP). The device uses separate VCC1/VCC2 supplies per channel and a dedicated VDD rail for SPI logic, supporting flexible power sequencing and low-noise IF output stages with open-collector IF buffers (IF1+/IF1–, IF2+/IF2–) and mixer outputs (MO1±, MO2±).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Frequency Range | 1.5GHz to 7GHz - supports LTE-U (5.1–5.9GHz), fixed satellite, and DAS bands with external matching networks. |
| IF Frequency Range | 1MHz to 900MHz - enables direct sampling of wideband IF signals without additional IF amplification stages. |
| Power Conversion Gain | 9dB at 0dB IF attenuation - provides high signal-to-noise ratio in first downconversion stage of diversity receivers. |
| Output IP3 | 32dBm - ensures robust linearity against strong adjacent-channel interferers in dense RF environments. |
| IF Gain Control Range | 15.5dB in 0.5dB steps - allows fine-grained digital gain calibration across temperature and process variation. |
| Supply Voltage | 3.3V for analog rails (VCC1/VCC2), 1.8–3.3V for SPI logic (VDD) - simplifies power design with single main supply and flexible I/O voltage. |
| Operating Temperature | –40°C to 105°C case temperature - qualified for industrial and outdoor base station deployment. |
Pinout & Package
32-lead (5mm × 5mm) plastic QFN package with exposed thermal pad (Pin 33 = GND), requiring soldering to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RF1, RF2 (Pins 2, 7) | Single-ended RF inputs | Internally biased to VCC/2; require series DC-blocking capacitors and external matching networks per band. |
| LO+, LO– (Pins 20, 21) | Differential LO input | 50Ω internally matched; accepts single-ended or differential LO drive; requires DC-blocking if LO source has DC offset. |
| IF1+, IF1–, IF2+, IF2– (Pins 17, 18, 23, 24) | Differential IF buffer outputs | Open-collector; require pull-up inductors to VCC; deliver 47mA typical DC current per channel. |
| MO1+, MO1–, MO2+, MO2– (Pins 10, 11, 30, 31) | Differential mixer outputs | Open-collector; require pull-up inductors to VCC; deliver 28mA typical DC current per mixer path. |
| EN1, EN2 (Pins 13, 28) | Channel enable controls | CMOS inputs with 330kΩ internal pull-down; enable/disable channels independently with <0.3µs switching time. |
| CSB, CLK, SDI, SDO (Pins 3, 4, 5, 6) | SPI interface | Standard 4-wire serial interface; VDD-referenced logic levels; supports 20MHz clock for fast configuration updates. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel gain matching | ±0.04dB IF gain error between any two 0.5dB steps ensures amplitude coherence in MIMO beamforming paths. |
| Low-phase-error IF path | 3.6° phase error over full 15.5dB IF attenuation range at 250MHz enables accurate IQ signal reconstruction. |
| High channel isolation | 44dB at 3.6GHz prevents crosstalk between diversity receive paths in compact PCB layouts. |
| Fast power-state control | 0.3µs enable turn-on and 0.1µs turn-off times support TDD-based dynamic channel activation. |
| Thermal robustness | θJC = 7.7°C/W with exposed pad grounding enables sustained full-power operation in sealed enclosures. |
Applications
| 4G/5G MIMO Receivers | 5.1–5.9GHz LTE-U Systems |
|---|---|
Use Scenario: Dual-polarized antenna arrays in macrocell base stations requiring simultaneous RF-to-IF downconversion with matched gain and phase across channels. IC Role / Device Role / Timing Role: Primary downconverting mixer with integrated IF VGA, replacing discrete mixer + amplifier chains. Use Value: 15.5dB digitally programmable IF gain eliminates manual calibration and reduces BOM count by consolidating gain control into one IC. | Use Scenario: Unlicensed spectrum access in enterprise Wi-Fi 6E infrastructure using LTE-U protocols in the 5GHz band. IC Role / Device Role / Timing Role: High-linearity RF front-end mixer supporting wide instantaneous bandwidth and low noise figure under blocker conditions. Use Value: 32dBm OIP3 and 13.4dB SSB NF at 1.8GHz enable reliable demodulation of low-SNR LTE-U signals amid coexisting Wi-Fi interference. |
| Distributed Antenna Systems (DAS) | Fixed Satellite Services |
Use Scenario: Remote radio units in indoor/outdoor DAS deployments needing low-power, thermally efficient RF conversion over extended temperature ranges. IC Role / Device Role / Timing Role: Dual-channel downconverter with independent enable control for sector-specific RF path management. Use Value: Reduced power mode cuts total supply current by ~25% per channel, extending uptime in fanless remote units. | Use Scenario: L-band and C-band satellite ground terminals requiring stable gain and phase performance across wide temperature swings. IC Role / Device Role / Timing Role: Precision IF gain-controlled mixer supporting coherent multi-channel demodulation in phased-array feeds. Use Value: ±0.013dB/°C conversion gain drift ensures minimal AGC loop disturbance over –40°C to 105°C operating range. |
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#PBF | 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; not viable for 5GHz LTE-U or C-band satellite. | Select LTC5556IUH#PBF when RF > 3GHz or IF > 500MHz is required; LTC5566IUH#PBF remains valid for legacy 2G/3G/LTE-FDD designs. |
| ADL5375-05ACPZ-R7 | Single-channel quadrature modulator (not mixer); no IF gain control; 1.7–2.7GHz RF range only; requires external IF amplification. | Designed for transmit path; incompatible with receive-side downconversion and gain-programmable IF chain requirements. | LTC5556IUH#PBF is not functionally substitutable with ADL5375-05ACPZ-R7 due to fundamental architecture mismatch-use only for receive-path applications requiring dual-channel, gain-programmable downconversion. |
Compared with LTC5566IUH#PBF and ADL5375-05ACPZ-R7, the LTC5556IUH#PBF uniquely delivers dual-channel 3–7GHz downconversion with 900MHz IF bandwidth and 0.5dB-resolution digital gain control-enabling compact, calibrated MIMO front-ends where RF bandwidth, IF flexibility, and channel matching are critical.
Availability
LTC5556IUH#PBF is available at Aetrix Electronics and suitable for 4G/5G MIMO receivers, LTE-U systems, distributed antenna systems, and fixed satellite services requiring stable component supply across industrial temperature grades and long production lifecycles.
Supply support for LTC5556IUH#PBF 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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving communications, industrial, automotive, and aerospace markets.
The LTC5556IUH#PBF belongs to Analog Devices' high-frequency RF mixer product line, engineered specifically for next-generation wireless infrastructure requiring wideband, dual-channel, digitally programmable downconversion with precision gain and phase matching.
FAQ
What is the RF input frequency range supported by the LTC5556IUH#PBF?
The LTC5556IUH#PBF supports an RF input frequency range of 1.5GHz to 7GHz, with optimal performance between 3GHz and 7GHz. Operation down to 1.5GHz or up to 8GHz is possible but with degraded specifications including return loss and conversion gain flatness. External matching networks are required and vary by band (e.g., B1 for 1.5–2.1GHz, B3 for 2.6–6.4GHz).
Does the LTC5556IUH#PBF support differential or single-ended LO drive?
Yes, the LTC5556IUH#PBF supports both differential and single-ended LO drive on its LO+ and LO– pins. Each pin is internally matched to 50Ω and includes ESD protection diodes to ground, requiring DC-blocking capacitors only if the LO source presents DC voltage. LO frequency range spans 500MHz to 8GHz.
How is IF gain controlled on the LTC5556IUH#PBF, and what is the resolution?
The LTC5556IUH#PBF provides 15.5dB of IF gain control in precise 0.5dB steps via its 16-bit SPI interface. Each channel's IF VGA is programmed independently, with gain error ≤ ±0.04dB between adjacent steps and ≤ 0.3dB integral error over the full range-enabling high-fidelity automatic gain control in closed-loop receiver systems.
What are the power supply requirements for the LTC5556IUH#PBF?
The LTC5556IUH#PBF requires three supply domains: VCC1 and VCC2 (3.0–3.6V, typically 3.3V) for analog channel power (40mA/channel typical), and VDD (1.6–3.6V, typically 3.3V or 1.8V) for SPI logic. Total supply current is 380mA (both channels, full power mode) or 290mA (both channels, reduced power mode), with shutdown current <1.2mA.
Can the LTC5556IUH#PBF be used in applications requiring operation beyond 105°C case temperature?
No-the LTC5556IUH#PBF is specified and guaranteed for operation from –40°C to 105°C case temperature (TC). Junction temperature must not exceed 150°C. For extended temperature applications, consult Analog Devices' product change notifications or consider alternative devices explicitly rated for wider ranges; the LTC5556IUH#PBF itself is not qualified beyond 105°C TC.
LTC5556IUH#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LTC5556IUH#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC5556IUH#PBF 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#PBF reliable?
The price and inventory of LTC5556IUH#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC5556IUH#PBF is usually 5 days.
3.What payment methods are accepted for LTC5556IUH#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC5556IUH#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC5556IUH#PBF?
LTC5556IUH#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC5556IUH#PBF 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#PBF?
For technical support, including LTC5556IUH#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC5556IUH#PBF requirements.
6.How does Aetrix verify that LTC5556IUH#PBF is sourced from the original manufacturer or authorized distributors?
All LTC5556IUH#PBF 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#PBF meets industry standards.
7.What is the process for return or replacement of LTC5556IUH#PBF?
All LTC5556IUH#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC5556IUH#PBF, 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#PBF part is unused and in its original packaging.
Return procedure for LTC5556IUH#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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