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Analog Devices Inc. LTC5542IUH#TRPBF
- Part No.:
- LTC5542IUH#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Mixers
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
LTC5542IUH#TRPBF.pdf
- Description:
- IC MIXR 1.6-2.7GHZ DWNCONV 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,417
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Product details
Overview
LTC5542IUH#TRPBF from Analog Devices (formerly Linear Technology) is a high-dynamic-range passive downconverting mixer IC optimized for 1.6GHz–2.7GHz RF input and 1.7GHz–2.5GHz LO operation. It delivers 8dB conversion gain, 26.8dBm IIP3, and 9.9dB noise figure at 2.4GHz with 0dBm LO drive, enabling LTE/WiMAX receiver front-ends requiring wide IF bandwidth (5–500MHz) and high blocking immunity.
For engineers reviewing the LTC5542IUH#TRPBF datasheet, LTC5542IUH#TRPBF pinout, LTC5542IUH#TRPBF application, or LTC5542IUH#TRPBF equivalent, key selection criteria include its dual-LO SPDT switch with 52dB isolation, shutdown control (500μA quiescent), differential IF output with adjustable bias, and 20-lead 5mm × 5mm QFN package supporting both low-side and high-side LO injection.
Technical Context
The LTC5542IUH#TRPBF integrates a passive double-balanced mixer core, differential IF amplifier with open-collector outputs, high-speed SPDT LO switch, LO buffer amplifiers, and bias/shutdown circuitry. Its RF and LO inputs are single-ended and 50Ω-matched; IF output is differential with external biasing via inductors or transformer center-tap.
It supports two distinct LO injection modes: low-side (RF = LO + IF, 1.9–2.7GHz RF) and high-side (RF = LO – IF, 1.6–2.3GHz RF), each with validated flat gain (±0.15–0.20dB) and stable IIP3/NF across temperature (–40°C to 85°C). LO switching time is 50ns, and shutdown turn-off time is 1.5μs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Frequency Range | 1.6GHz–2.7GHz; supports LTE Band 7/38/41 and WiMAX 2.3–2.7GHz receivers. |
| LO Frequency Range | 1.7GHz–2.5GHz; requires 0dBm ±6dB drive; enables frequency-hopping via LO1/LO2 selection. |
| Conversion Gain | 8.0dB typical at 2.4GHz; enables direct interface to ADCs without additional IF gain stages. |
| IIP3 | 26.8dBm at 2.4GHz; allows handling of strong adjacent-channel interferers in dense RF environments. |
| Noise Figure | 9.9dB SSB NF at 2.4GHz; maintains SNR integrity in high-selectivity receiver chains with lossy IF filters. |
| Supply Voltage | VCC = 3.3V (mixer/LO switch), VCCIF = 3.3V or 5V (IF amp); 5V IF supply raises P1dB by >3dB. |
| Package | 20-lead 5mm × 5mm QFN with exposed thermal pad; RoHS-compliant, lead-free finish. |
Pinout & Package
20-lead plastic QFN (UH package), 5mm × 5mm, 0.5mm pitch, exposed thermal pad (Pin 21) soldered to PCB ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RF (Pin 2) | Single-ended RF input | Internally connected to primary of integrated transformer; requires DC-blocking capacitor; 50Ω matched when selected LO is driven. |
| LO1 (Pin 11), LO2 (Pin 15) | Single-ended LO inputs | 50Ω matched even in shutdown state; LO1 active when LOSEL = Low; LO2 active when LOSEL = High. |
| LOSEL (Pin 9) | LO select logic input | CMOS-compatible (0.3V/3V thresholds); controls SPDT switch; <50ns switching time enables fast frequency hopping. |
| SHDN (Pin 5) | Shutdown control | Active-low logic; reduces total current to 500μA; turn-off time 1.5μs; prevents floating. |
| IF+ (Pin 19), IF– (Pin 18) | Differential IF amplifier outputs | Open-collector; require external bias via inductors or transformer center-tap; 100mA total DC current draw. |
| IFGND (Pin 16) | IF amplifier ground return | Mandatory connection to system ground; completes IF amplifier DC current path; omission disables IF output. |
| VCC1/VCC2 (Pins 8/6), VCC3 (Pin 14) | Mixer/LO buffer and LO switch supplies | All require 3.3V ±0.2V; bypass capacitors mandatory near pins; total VCC current ~116mA. |
| VCCIF (Pins 18/19) | IF amplifier supply | 3.3V or 5V operation; 5V increases P1dB by >3dB; 100mA total supply current. |
Key Features
| Feature | Design Value |
|---|---|
| High LO-RF and LO-IF isolation | LO-RF >49dB and LO-IF <–40dBm ensure minimal LO leakage into RF/IF paths, reducing spurious mixing. |
| Integrated SPDT LO switch | 52dB isolation between LO1/LO2 ports enables dual-synthesizer architectures without external switches or routing complexity. |
| Wide IF bandwidth support | 5–500MHz IF output range allows flexible channelization in software-defined radios and multi-standard base stations. |
| Blocking-resistant noise figure | 17.3dB NF under +5dBm blocker at 2500MHz preserves sensitivity in presence of strong out-of-band interferers. |
| Adjustable IF and LO bias | IFBIAS (Pin 20) and LOBIAS (Pin 7) allow fine-tuning of amplifier currents for power/performance trade-offs in custom designs. |
Applications
| Cellular Base Station Receiver | Point-to-Point Microwave Link |
|---|---|
|
Use Scenario: LTE FDD/TDD macrocell receiver operating in Band 7 (2500–2690MHz) with 190MHz IF and low-side LO injection. IC Role / Device Role / Timing Role: Downconverting mixer providing RF-to-IF translation, gain, and linearity before SAW filtering and ADC sampling. Use Value: 26.8dBm IIP3 and 8dB gain enable rejection of co-site interferers while minimizing cascaded noise figure in multi-stage receivers. |
Use Scenario: 5GHz licensed backhaul link with 2.3GHz RF input, 190MHz IF, and high-side LO injection for image suppression. IC Role / Device Role / Timing Role: High-isolation downmixer translating microwave signals to baseband-compatible IF for demodulation. Use Value: >49dB RF-LO isolation and 52dB LO switch isolation prevent LO pulling and maintain EVM under dynamic load conditions. |
| WiMAX Subscriber Unit | Wideband Spectrum Analyzer Front-End |
|
Use Scenario: Mobile WiMAX CPE receiver covering 2.3–2.7GHz RF band with programmable LO and 190MHz IF output. IC Role / Device Role / Timing Role: Core RF mixer enabling broadband signal capture with minimal external components and small PCB footprint. Use Value: 20-lead QFN package and integrated transformer reduce BOM count and layout area versus discrete balun solutions. |
Use Scenario: Portable spectrum analyzer requiring 1.6–2.7GHz real-time RF coverage and >100dB dynamic range. IC Role / Device Role / Timing Role: High-linearity downconverter feeding digitizer with calibrated IF output for amplitude-accurate spectral analysis. Use Value: 17.3dB NF under blocking and ±0.15dB gain flatness ensure measurement fidelity across full IF bandwidth (5–500MHz). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar downconverting mixer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HMC774ALC3B | Wider RF range (1.2–4.0GHz), higher IIP3 (30dBm), but no integrated LO switch or shutdown pin. | Requires external SPDT switch and bias control logic; better suited for fixed-frequency, ultra-high-linearity test equipment. | Select when absolute IIP3 >30dBm is required and board space permits external switching components. |
| ADL5802ACPZ-R7 | Lower frequency range (100MHz–6GHz), integrated LO buffer, but lower IIP3 (23.5dBm) and no dual-LO selection. | Designed for general-purpose wideband receivers; lacks LO switching for frequency-hopping systems. | Select for cost-sensitive, single-LO applications where 23.5dBm IIP3 suffices and dual-LO capability is unnecessary. |
Compared with HMC774ALC3B and ADL5802ACPZ-R7, the LTC5542IUH#TRPBF uniquely combines dual-LO switching, shutdown control, and 26.8dBm IIP3 in a compact QFN-making it optimal for space-constrained, frequency-agile wireless infrastructure where integration reduces component count and improves reliability.
Availability
LTC5542IUH#TRPBF is available at Aetrix Electronics and suitable for LTE base station receivers, point-to-point microwave links, and WiMAX subscriber units requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC5542IUH#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and RF ICs for precision signal processing and connectivity.
The LTC5542IUH#TRPBF belongs to the LTC554x high-dynamic-range mixer family, designed specifically for wireless infrastructure receivers demanding wide bandwidth, high linearity, and integrated functionality in compact form factors.
FAQ
What is the recommended LO drive level for optimal performance of the LTC5542IUH#TRPBF?
The LTC5542IUH#TRPBF is specified for 0dBm LO drive across its 1.7–2.5GHz range, delivering best-in-class IIP3 (26.8dBm) and noise figure (9.9dB) at 2.4GHz. Performance remains robust over ±6dB (–6 to +6dBm), but LO power exceeding +6dBm risks ESD diode conduction. The LTC5542IUH#TRPBF's limiting LO amplifiers maintain consistent conversion gain and linearity within this window.
Can the LTC5542IUH#TRPBF operate with a single 3.3V supply, or does it require separate VCC and VCCIF rails?
The LTC5542IUH#TRPBF supports both configurations: a single 3.3V rail (VCC = VCCIF = 3.3V) simplifies power design, while dual supplies (VCC = 3.3V, VCCIF = 5V) increase RF input P1dB by >3dB-from 11.3dBm to 14.7dBm at 2400MHz. The LTC5542IUH#TRPBF's pinout separates VCC1/VCC2/VCC3 (mixer/LO) from VCCIF (IF amp), enabling independent optimization.
How does the LO switch isolation of the LTC5542IUH#TRPBF impact frequency-hopping receiver designs?
The LTC5542IUH#TRPBF's LO switch provides 49–52dB isolation between LO1 and LO2 ports, preventing crosstalk when rapidly toggling between synthesizers. With 50ns switching time and CMOS-compatible LOSEL control, the LTC5542IUH#TRPBF enables seamless frequency hopping in military comms and cognitive radio systems without external isolation components or timing delays.
What is the function of the CT (center-tap) pin on the LTC5542IUH#TRPBF, and is it mandatory to use?
Pin 3 (CT) connects to the secondary center-tap of the internal RF transformer and carries a nominal 1.2V DC bias. A bypass capacitor to ground may improve high-frequency decoupling but is not required for most applications. The LTC5542IUH#TRPBF operates correctly without CT connection; however, omitting it may slightly degrade RF input match stability across the 1.6–2.7GHz band per measured S11 data.
Does the LTC5542IUH#TRPBF support both low-side and high-side LO injection, and what are the RF frequency limits for each mode?
Yes-the LTC5542IUH#TRPBF supports both injection modes. In low-side LO mode (RF = LO + IF), RF range is 1.9–2.7GHz; in high-side LO mode (RF = LO – IF), RF range is 1.6–2.3GHz. Both modes are fully characterized with flat gain (±0.15–0.20dB), stable IIP3, and noise figure across temperature. The LTC5542IUH#TRPBF's datasheet provides separate AC tables for each configuration.
LTC5542IUH#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- RF Type:
- CDMA, LTE, W-CDMA, WiMAX
- Frequency:
- 1.6GHz ~ 2.7GHz
- Number of Mixers:
- 1
- Gain:
- 8dB
- Noise Figure:
- 9.9dB
- Secondary Attributes:
- Down Converter
- Current - Supply:
- 199mA
- Voltage - Supply:
- 3.1V ~ 3.5V
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (5x5)
LTC5542IUH#TRPBF FAQ
1.How can I place an order for LTC5542IUH#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC5542IUH#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 LTC5542IUH#TRPBF reliable?
The price and inventory of LTC5542IUH#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC5542IUH#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC5542IUH#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC5542IUH#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC5542IUH#TRPBF?
LTC5542IUH#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC5542IUH#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 LTC5542IUH#TRPBF?
For technical support, including LTC5542IUH#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC5542IUH#TRPBF requirements.
6.How does Aetrix verify that LTC5542IUH#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC5542IUH#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 LTC5542IUH#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC5542IUH#TRPBF?
All LTC5542IUH#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC5542IUH#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 LTC5542IUH#TRPBF part is unused and in its original packaging.
Return procedure for LTC5542IUH#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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