My Inquiry
My Account
Analog Devices Inc. LTC5555IUFD#TRPBF
- Part No.:
- LTC5555IUFD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Mixers
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
LTC5555IUFD#TRPBF.pdf
- Description:
- 1.5GHZ TO 7GHZ PRGM GAIN DWNCONV
- Quantity:
- Payment:
- Shipping:
Inventory:4,868
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC5555IUFD#TRPBF from Analog Devices is a 1.5GHz–7GHz programmable-gain downconverting mixer with integrated IF DVGA, 9dB power conversion gain, 31dBm output IP3, and SPI/parallel 0.5dB-step gain control. It serves as the core RF-to-IF signal path in high-linearity wireless infrastructure receivers.
For engineers reviewing the LTC5555IUFD#TRPBF datasheet, LTC5555IUFD#TRPBF pinout, LTC5555IUFD#TRPBF application, or LTC5555IUFD#TRPBF equivalent, key selection criteria include its 28-pin 4mm × 5mm QFN package, differential IF output impedance (200Ω || 1pF), RF input return loss >10dB across 1.5–6.4GHz bands, and dual-mode power operation (192mA full power / 147mA reduced power).
Technical Context
The LTC5555IUFD#TRPBF integrates an active double-balanced mixer stage followed by a digitally controlled variable-gain amplifier (DVGA) for precise IF gain adjustment. Its RF input uses an integrated transformer for 50Ω single-ended matching, while LO accepts either single-ended or differential drive with >9dB return loss from 500MHz to 7GHz.
Gain is set via 5-bit parallel interface (D0–D4) or 3-wire SPI (CSB/CLK/SDI/SDO), enabling 0.5dB resolution over 15.5dB range. The enable (EN) pin provides sub-microsecond turn-on/turn-off, and the RP pin allows hardware-selectable reduced-power mode independent of digital control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Frequency Range | 1.5GHz to 7GHz - supports 3.6GHz/4.8GHz/5.8GHz band infrastructure with external matching networks |
| Power Conversion Gain | 9dB at 0dB IF attenuation - enables direct interfacing to downstream IF filters/amplifiers without additional gain stages |
| Output IP3 | 31.1dBm at 0dB IF attenuation - ensures high linearity in crowded spectral environments like cellular base stations |
| IF Gain Control Range | 15.5dB in 0.5dB steps - allows fine-grained dynamic range management in AGC loops |
| Supply Current | 192mA (full power), 147mA (reduced power) - reduces thermal load in dense RF front-end layouts |
| Package | 28-lead 4mm × 5mm QFN - compact footprint compatible with high-frequency PCB stackups and thermal vias |
| Operating Temperature | –40°C to +105°C case temperature - qualified for outdoor wireless repeaters and military comms equipment |
Pinout & Package
Package: 28-lead (4mm × 5mm) plastic QFN with exposed thermal pad (Pin 29 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1,8,14,15,16,29) | Ground reference | Multiple low-inductance ground connections required for RF stability and thermal dissipation |
| RF (Pin 9) | Single-ended RF input | Internally biased to VCC/2; requires DC-blocking capacitor and external matching network |
| LO+, LO– (Pins 24,25) | Differential LO input | 50Ω matched even when disabled; accepts single-ended or differential LO drive |
| IF+, IF– (Pins 27,28) | Differential IF output | Open-collector; requires pull-up inductors to VCC; 200Ω || 1pF impedance simplifies filter interface |
| EN (Pin 4) | Enable control | CMOS input with 330kΩ internal pull-down; <0.3µs turn-on enables fast TDD switching |
| CSB, CLK, SDI, SDO (Pins 10,11,12,13) | SPI interface | 3.3V/1.8V logic-compatible; SDO tri-state enables bus sharing; 20MHz max clock supports rapid gain updates |
| D0–D4 (Pins 17–21) | Parallel gain control | 5-bit binary input; latched on CSB rising edge; PS pin selects SPI vs parallel mode |
Key Features
| Feature | Design Value |
|---|---|
| Programmable 0.5dB gain steps | Enables precise AGC implementation with <±0.04dB gain error at 150MHz IF |
| Dual power modes | Reduces current from 192mA to 147mA without sacrificing conversion gain flatness (±0.25dB @2.6GHz) |
| Integrated RF transformer | Eliminates external balun; maintains >10dB RF input return loss across 1.5–6.4GHz bands |
| High isolation architecture | RF-to-LO isolation >43dB and RF-to-unbalanced-IF isolation >52dB prevent signal leakage in full-duplex systems |
| Wide IF bandwidth support | Operates from 1MHz to 900MHz IF - suitable for both narrowband (e.g., LTE) and wideband (e.g., 5G NR) applications |
Applications
| 3.6GHz Wireless Infrastructure Receiver | Software-Defined Radio Front-End |
|---|---|
Use Scenario: Cellular base station receiver operating in 3.6GHz licensed band with stringent ACLR requirements. IC Role / Device Role / Timing Role: Primary downconverting mixer providing RF-to-IF translation and programmable IF gain before ADC sampling. Use Value: 31.1dBm OIP3 and ±0.30dB conversion gain flatness over ±100MHz bandwidth ensure compliance with 3GPP adjacent channel leakage specifications. | Use Scenario: Reconfigurable SDR platform supporting multiple waveforms (LTE, WiMAX, custom protocols) across 1.5–7GHz. IC Role / Device Role / Timing Role: Agile RF front-end component enabling real-time IF gain reprogramming via SPI during waveform transitions. Use Value: 0.5dB gain resolution and <0.3µs enable time allow dynamic range optimization without interrupting data flow. |
| Military Radar Receiver | Test & Measurement Equipment |
Use Scenario: EW system receiver requiring wide instantaneous bandwidth and high spurious-free dynamic range. IC Role / Device Role / Timing Role: High-linearity mixer stage in broadband radar IF chain with temperature-stable gain (–0.013dB/°C drift). Use Value: 56dBm IIP2 and 26.2dBm IIP3 at 2.6GHz enable detection of weak targets amid strong jamming signals. | Use Scenario: Vector signal analyzer front-end needing calibrated, repeatable downconversion performance across frequency sweeps. IC Role / Device Role / Timing Role: Precision mixer with tight gain distribution (±0.3dB typical) and low phase error (3.6° at 150MHz). Use Value: <±0.39dB integral gain error over full 15.5dB range ensures measurement accuracy without per-unit calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar downconverting mixer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HMC1040LP4E | Fixed-gain (12dB) mixer; no integrated DVGA; requires external IF amplifier for gain control | Lacks programmable IF gain; suited for fixed-gain architectures where digital control is unnecessary | Select when simplicity and lower BOM count outweigh need for AGC flexibility |
| ADL5365 | Wider RF range (400MHz–6GHz); higher noise figure (15.5dB typ); no SPI interface - analog gain control only | Requires external DAC and op-amp for gain programming; less suitable for digital-intensive SDR designs | Select when operating below 1.5GHz or when analog control loop integration is preferred |
Compared with HMC1040LP4E and ADL5365, the LTC5555IUFD#TRPBF uniquely combines on-chip 15.5dB digitally programmable IF gain, ultra-low gain error (<±0.04dB), and dual power modes - making it optimal for space-constrained, thermally sensitive, and dynamically reconfigurable RF receivers.
Availability
LTC5555IUFD#TRPBF is available at Aetrix Electronics and suitable for 3.6GHz wireless infrastructure, military radar receivers, and software-defined radio front-ends requiring stable component supply and guaranteed long-term availability.
Supply support for LTC5555IUFD#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 is a global leader in high-performance analog, mixed-signal, and RF ICs, serving communications, industrial, automotive, and defense markets with precision signal processing solutions.
The LTC5555IUFD#TRPBF belongs to Analog Devices' high-frequency mixer product line, designed specifically for demanding wireless infrastructure and test equipment applications requiring wide bandwidth, high linearity, and digital gain control.
FAQ
What is the RF input impedance and matching requirement for the LTC5555IUFD#TRPBF?
The LTC5555IUFD#TRPBF features an integrated RF transformer providing a single-ended 50Ω input. External matching components (e.g., C1/C12 per datasheet Table) are required for optimal return loss (>10dB) across specific bands: 1.5–2.1GHz, 2.2–3.2GHz, 2.6–6.4GHz, or 5.6–7.2GHz. No external balun is needed due to the on-chip transformer.
How does the LTC5555IUFD#TRPBF handle LO drive configuration?
The LTC5555IUFD#TRPBF accepts either single-ended or differential LO drive on pins LO+ and LO–. Each pin is internally matched to 50Ω and includes ESD protection diodes to ground, requiring DC-blocking capacitors if the LO source has DC offset. LO input power range is –6dBm to +6dBm, with >9dB return loss from 500MHz to 7GHz.
What are the power supply requirements for the LTC5555IUFD#TRPBF?
The LTC5555IUFD#TRPBF requires two supplies: VCC = 3.3V (±0.3V) for the mixer core and MO+/MO– outputs (192mA full power), and VDD = 1.8V–3.3V for SPI/parallel logic (≤1mA active, <500µA idle). Separate bypassing is mandatory - 1μF and 10nF capacitors near VCC, and 1nF near VDD.
Can the LTC5555IUFD#TRPBF operate outside its specified 1.5–7GHz RF range?
The LTC5555IUFD#TRPBF is characterized and optimized for 1.5GHz–7GHz RF operation. While functional down to 1.5GHz, performance degrades below this point (e.g., reduced gain flatness, higher noise figure). Operation above 7GHz is not supported - LO input is rated to 8GHz but RF port matching and isolation degrade beyond 7GHz.
What is the function of the RP pin on the LTC5555IUFD#TRPBF?
The RP (Reduced Power) pin on the LTC5555IUFD#TRPBF is a hardware override that forces reduced-power mode (147mA) when driven high, independent of SPI commands. When low, the device operates in full-power mode unless programmed otherwise via SPI. It includes a 330kΩ internal pull-down resistor for default full-power operation when unconnected.
LTC5555IUFD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LTC5555
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- RF Type:
- Radar
- Frequency:
- 1.5GHz ~ 7GHz
- Number of Mixers:
- 1
- Gain:
- 9.5dB
- Noise Figure:
- 14dB
- Secondary Attributes:
- Down Converter
- Current - Supply:
- 192mA
- Voltage - Supply:
- 3V ~ 3.6V
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-QFN (4x5)
LTC5555IUFD#TRPBF FAQ
1.How can I place an order for LTC5555IUFD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC5555IUFD#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 LTC5555IUFD#TRPBF reliable?
The price and inventory of LTC5555IUFD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC5555IUFD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC5555IUFD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC5555IUFD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC5555IUFD#TRPBF?
LTC5555IUFD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC5555IUFD#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 LTC5555IUFD#TRPBF?
For technical support, including LTC5555IUFD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC5555IUFD#TRPBF requirements.
6.How does Aetrix verify that LTC5555IUFD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC5555IUFD#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 LTC5555IUFD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC5555IUFD#TRPBF?
All LTC5555IUFD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC5555IUFD#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 LTC5555IUFD#TRPBF part is unused and in its original packaging.
Return procedure for LTC5555IUFD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC5555IUFD#TRPBF Tags
-
MAX2671EUT+T
Analog Devices Inc./Maxim Integrated
-
ADEX-10+
Mini-Circuits
-
ADE-2+
Mini-Circuits
-
ADE-1+
Mini-Circuits
-
LT5560EDD#PBF
Analog Devices Inc.
-
LT5560EDD#TRPBF
Analog Devices Inc.
-
LTC5562IUC#TRPBF
Analog Devices Inc.
-
MAX2681EUT+T
Analog Devices Inc./Maxim Integrated
-
ADE-1ASK+
Mini-Circuits
-
ADE-1L+
Mini-Circuits
-
ADL5350ACPZ-R7
Analog Devices Inc.
-
AD608ARZ-RL
Analog Devices Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
