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Analog Devices Inc. HMC521-SX
- Part No.:
- HMC521-SX
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Mixers
- Package:
- Die
- Datasheet:
-
HMC521-SX.pdf
- Description:
- IC MMIC IQ MIXER DIE
- Quantity:
- Payment:
- Shipping:
Inventory:3,005
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Product details
Overview
HMC521-SX from Hittite Microwave Corporation (now part of Analog Devices) is a GaAs MMIC I/Q mixer designed for image-reject downconversion or single-sideband upconversion in 8.5–13.5 GHz RF systems, delivering 10 dB typical conversion loss, 38 dB image rejection, and +23 dBm input IP3 at IF = 100 MHz - used in point-to-point radio transceivers and military radar front-ends.
For engineers reviewing the HMC521-SX datasheet, HMC521-SX pinout, HMC521-SX application, or HMC521-SX equivalent, key selection criteria include RF/LO frequency coverage (8.5–13.5 GHz), DC–3.5 GHz IF bandwidth, LO drive sensitivity (+15 dBm typical), amplitude/phase balance (<0.3 dB / <4°), and 24-lead 4×4 mm SMT package compatibility with surface-mount assembly.
Technical Context
The HMC521-SX integrates two double-balanced GaAs MESFET mixer cells and an on-die 90° hybrid to enable quadrature signal processing without external hybrids. It operates as either an image-reject mixer (IRM) or SSB upconverter, with DC-coupled IF1/IF2 ports and AC-coupled RF/LO ports matched to 50 Ω across its full band.
Its architecture supports wide IF bandwidth (DC–3.5 GHz), high LO-to-RF isolation (55 dB max), and stable performance over temperature (−55°C to +85°C), enabling direct IF sampling and broadband modulation schemes in compact microwave subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF/LO Frequency Range | 8.5–13.5 GHz - covers X-band radar and licensed point-to-point links |
| IF Bandwidth | DC–3.5 GHz - supports baseband I/Q sampling and wideband digital IF processing |
| Conversion Loss (IRM) | 7.5–9.5 dB typ - low loss enables high receiver sensitivity without added gain stages |
| Image Rejection | 30–38 dB typ - suppresses unwanted sideband by >1000× power ratio |
| Input IP3 | +23 to +24 dBm - handles strong interferers in dense RF environments |
| LO Drive Level | +15 dBm typical - compatible with standard synthesizer outputs, no external amplification needed |
| Amplitude Balance | ≤0.3 dB - ensures accurate I/Q vector reconstruction for QAM/OFDM demodulation |
| Phase Balance | ≤4° - minimizes quadrature error-induced carrier leakage and EVM degradation |
Pinout & Package
Package: 24-lead, 4×4 mm leadless RoHS-compliant SMT package with alumina body, gold-over-nickel plating, and exposed ground paddle requiring soldering to PCB RF ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 6–8, 10, 13, 17–24 | No Connection | Internally unconnected; may be grounded without performance impact |
| 3, 5, 12, 14, 16 | Ground | RF/DC ground reference; must connect to PCB ground plane with low-inductance path |
| 4 | RF Input | AC-coupled 50 Ω port for 8.5–13.5 GHz RF signal; requires external DC blocking if biased |
| 9 | IF1 Output | DC-coupled I-channel output; limited to ±3 mA current; DC-blocking cap required for AC-only IF use |
| 11 | IF2 Output | DC-coupled Q-channel output; identical electrical behavior to IF1 |
| 15 | LO Input | AC-coupled 50 Ω port for 8.5–13.5 GHz local oscillator; +15 dBm nominal drive |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 90° Hybrid | Eliminates need for external IF hybrid, reducing board area and phase-matching complexity |
| DC-Coupled IF Outputs | Enables true baseband I/Q generation for zero-IF receivers and direct-conversion architectures |
| High LO-to-RF Isolation | 55 dB max prevents LO leakage into antenna path, easing filter requirements in TDD systems |
| Wide IF Bandwidth | DC–3.5 GHz supports multi-standard operation (e.g., 5G FR2, satellite comms, radar pulse shaping) |
| Surface-Mount Compatibility | Leadless Pb-free package supports reflow assembly without wire bonding, improving reliability and yield |
Applications
| Point-to-Point Radio Transceivers | Military Radar Front-Ends |
|---|---|
Use Scenario: Full-duplex 10–12 GHz backhaul link using I/Q modulation for spectral efficiency. IC Role / Device Role / Timing Role: Image-reject downconverter in receive chain and SSB upconverter in transmit chain. Use Value: 38 dB image rejection enables clean channel separation without bulky image-reject filters, reducing BOM cost and size. | Use Scenario: X-band pulsed Doppler radar with simultaneous I/Q sampling for clutter cancellation. IC Role / Device Role / Timing Role: Quadrature downconverter converting RF echoes to baseband I/Q for digital beamforming. Use Value: DC–3.5 GHz IF bandwidth captures wide instantaneous bandwidths for high-range-resolution pulse compression. |
| Satellite Communication Modems | Test & Measurement Signal Sources |
Use Scenario: Ka-band satellite uplink modem generating suppressed-carrier SSB signals. IC Role / Device Role / Timing Role: Single-sideband upconverter with precise amplitude/phase balance for carrier suppression. Use Value: ≤0.3 dB amplitude and ≤4° phase balance ensure >35 dB carrier suppression, meeting CCSDS spectral mask requirements. | Use Scenario: Microwave signal generator producing calibrated I/Q test tones from 8.5–13.5 GHz. IC Role / Device Role / Timing Role: High-linearity I/Q mixer used in vector signal generator RF section. Use Value: +24 dBm input IP3 allows clean tone generation with minimal harmonic distortion up to −10 dBm output. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar I/Q mixer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HMC1048LC4 | Wider RF range (6–18 GHz), higher conversion loss (11 dB typ), lower IP3 (+21 dBm) | Better suited for multi-band lab equipment; less optimal for narrowband high-sensitivity radar | Select HMC1048LC4 only when extended frequency coverage outweighs loss/IP3 trade-offs |
| ADMV1013 | Integrated LO synthesizer and digital interface; 10–16 GHz RF, +25 dBm IP3, but larger 7×7 mm package | Targets software-defined radio with calibration support; not drop-in for legacy analog designs | Choose ADMV1013 for new designs needing integrated LO control and digital calibration, not for HMC521-SX replacement |
Compared with HMC1048LC4 and ADMV1013, the HMC521-SX offers superior image rejection (38 dB) and compact 4×4 mm footprint ideal for space-constrained X-band radios, while maintaining best-in-class balance specs for high-fidelity I/Q signal integrity without added calibration overhead.
Availability
HMC521-SX is available at Aetrix Electronics and suitable for point-to-point radio, military radar, and satellite communication systems requiring stable component supply, consistent RF performance across temperature, and long-term obsolescence management.
Supply support for HMC521-SX 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
Hittite Microwave Corporation, acquired by Analog Devices in 2014, specialized in high-frequency RFICs and MMICs for defense, aerospace, and wireless infrastructure.
The HMC521-SX belongs to Hittite's GaAs MMIC I/Q mixer product line, engineered for high-performance microwave transceivers where image rejection, wide IF bandwidth, and surface-mount reliability are critical.
FAQ
What is the operating temperature range for the HMC521-SX?
The HMC521-SX is specified for operation from −55°C to +85°C ambient temperature. Its GaAs MESFET process and thermally optimized 4×4 mm alumina package with 141.4 °C/W junction-to-case thermal resistance ensure stable RF performance across this full industrial/military range, with measured image rejection and conversion loss variation within datasheet limits.
Does the HMC521-SX require external LO buffering?
No, the HMC521-SX does not require external LO buffering: it is characterized at +15 dBm LO drive and operates reliably within ±2 dBm tolerance. Its AC-coupled 50 Ω LO port accepts direct output from most integrated synthesizers (e.g., ADF4351, LMX2594) without amplification, simplifying RF front-end design and reducing power consumption.
Can the HMC521-SX be used for zero-IF (direct-conversion) receivers?
Yes, the HMC521-SX supports zero-IF operation: its DC-coupled IF1 and IF2 outputs allow baseband I/Q signal extraction without external IF transformers or hybrids. However, DC current at IF pins must be limited to ±3 mA to prevent malfunction - external DC blocking capacitors are required unless true DC coupling is implemented with proper bias management.
What is the maximum RF input power the HMC521-SX can handle?
The HMC521-SX has an absolute maximum RF/IF input rating of +20 dBm. For linear operation, the 1 dB compression point is +14 to +15 dBm (input referred), and the input IP3 is +23 to +24 dBm. Sustained operation above +15 dBm risks compression, intermodulation distortion, and potential device damage if thermal limits are exceeded.
Is the HMC521-SX pin-compatible with other Hittite I/Q mixers like the HMC520LC4?
No, the HMC521-SX is not pin-compatible with HMC520LC4: it uses a 24-lead 4×4 mm layout with specific IF1/IF2/LO/RF assignments, whereas HMC520LC4 is a 16-lead 3×3 mm device with different pin count, spacing, and terminal functions. PCB redesign is required for substitution - consult respective outline drawings before migration.
HMC521-SX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- Die
- Packaging:
- Bulk
- Product Status:
- Obsolete
- RF Type:
- Radar
- Frequency:
- 8.5GHz ~ 13.5GHz
- Number of Mixers:
- 2
- Gain:
- -
- Noise Figure:
- -
- Secondary Attributes:
- Up Converter
- Current - Supply:
- -
- Voltage - Supply:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Die
HMC521-SX FAQ
1.How can I place an order for HMC521-SX through Aetrix?
Please submit a Request for Quotation (RFQ) for HMC521-SX 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 HMC521-SX reliable?
The price and inventory of HMC521-SX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HMC521-SX is usually 5 days.
3.What payment methods are accepted for HMC521-SX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HMC521-SX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HMC521-SX?
HMC521-SX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HMC521-SX 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 HMC521-SX?
For technical support, including HMC521-SX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HMC521-SX requirements.
6.How does Aetrix verify that HMC521-SX is sourced from the original manufacturer or authorized distributors?
All HMC521-SX 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 HMC521-SX meets industry standards.
7.What is the process for return or replacement of HMC521-SX?
All HMC521-SX units undergo pre-shipment inspection (PSI). If there is an issue with HMC521-SX, 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 HMC521-SX part is unused and in its original packaging.
Return procedure for HMC521-SX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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