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Analog Devices Inc. HMC525A-SX
- Part No.:
- HMC525A-SX
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Mixers
- Package:
- Die
- Datasheet:
-
HMC525A-SX.pdf
- Description:
- 12-PAD BARE DIE [CHIP] SAMPLE PA
- Quantity:
- Payment:
- Shipping:
Inventory:2,555
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Product details
Overview
HMC525A-SX from Analog Devices is a GaAs MMIC passive I/Q mixer operating from 4 GHz to 8.5 GHz RF/LO, with dc–3.5 GHz IFx ports, 11 dB max conversion loss (downconverter), 17 dBm min input IP3, and 43 dB min LO-to-RF isolation-designed for image-reject downconversion and single-sideband upconversion in microwave test instrumentation.
For engineers reviewing the HMC525A-SX datasheet, HMC525A-SX pinout, HMC525A-SX application, or HMC525A-SX equivalent, this device supports high-frequency spectral translation requiring precise phase/amplitude balance, no DC bias, surface-mount assembly, and integration with external 90° hybrids for sideband suppression in defense and point-to-point radio systems.
Technical Context
The HMC525A-SX implements two double-balanced mixer cells and an on-die 90° hybrid in a GaAs MESFET process, enabling intrinsic I/Q signal separation without external hybrids for basic operation-though optimal image/sideband rejection requires an external 90° hybrid at the IFx ports. It operates as either an image-reject downconverter (lower or upper sideband) or a single-sideband upconverter.
Its passive architecture eliminates DC bias requirements, supports wide IF bandwidth (dc to 3.5 GHz), and delivers stable RF/LO port matching to 50 Ω when LO is active. Phase balance is specified at 0.24° (4.5–6 GHz) and amplitude balance at 0.65 dB under typical downconverter conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF/LO Frequency Range | 4 GHz to 8.5 GHz - enables direct mixing in C-, X-, and Ku-band radar and comms systems without frequency translation stages. |
| IFx Frequency Range | DC to 3.5 GHz - supports baseband I/Q demodulation and wideband IF processing including zero-IF architectures. |
| Conversion Loss (Downconv.) | 8–11 dB - defines signal attenuation through the mixer path; impacts system noise figure and gain budget planning. |
| Input IP3 | 17–21 dBm - determines third-order intermodulation distortion performance in multi-tone RF environments like spectrum analyzers. |
| LO-to-RF Isolation | 43–46 dB - minimizes LO leakage into antenna or RF front-end paths, reducing self-interference and filtering requirements. |
| Image Rejection | 21–31.5 dBc - quantifies suppression of unwanted image band; requires external 90° hybrid and careful layout for best results. |
| Phase/Amplitude Balance | 0.09° / 0.8 dB (4.5–6 GHz) - critical for I/Q orthogonality; directly limits achievable image/sideband rejection in real-world layouts. |
Pinout & Package
12-pad RoHS-compliant bare die (CHIP) package with exposed ground pads for RF grounding and thermal conduction. Requires wire bonding or flip-chip mounting per MIL-STD-883 handling guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 7, 9, 10 | GND | RF and DC ground reference; must be low-inductance connected to system ground plane for impedance control and isolation. |
| 2 | RF | Radio frequency input/output port; dc-coupled and 50 Ω matched when LO is active-no external bias tee required. |
| 4, 5, 6 | NC | No-connect terminals; must remain unconnected and unmetallized to avoid parasitic coupling or resonance. |
| 8 | LO | Local oscillator input; dc-coupled and 50 Ω matched-accepts +13 to +17 dBm drive for optimal linearity and conversion loss. |
| 11, 12 | IF2, IF1 | Quadrature intermediate frequency outputs/inputs; dc-coupled; current-limited to ±3 mA-requires external dc blocking if dc not needed. |
Key Features
| Feature | Design Value |
|---|---|
| No DC bias required | Passive GaAs design eliminates bias networks, simplifying PCB layout and improving reliability in high-vibration environments. |
| Integrated 90° hybrid | On-die quadrature generation enables compact I/Q architecture-reduces external component count versus hybrid coupler-based solutions. |
| Surface-mount compatible | Bare die form factor supports automated flip-chip or wire-bond assembly, eliminating manual hybrid module integration. |
| Wide IF bandwidth (dc–3.5 GHz) | Enables direct baseband I/Q sampling and supports both low-IF and zero-IF receiver topologies without IF filtering constraints. |
| High LO-to-RF isolation (43+ dB) | Reduces need for LO suppression filters in transmit/receive shared-antenna systems, lowering bill-of-materials and insertion loss. |
Applications
| Test & Measurement Receivers | Military Radar Front Ends |
|---|---|
|
Use Scenario: Spectrum analysis and signal intelligence receivers requiring wide instantaneous bandwidth and high dynamic range. IC Role / Device Role / Timing Role: Image-reject downconverter translating 4–8.5 GHz RF to dc–3.5 GHz I/Q baseband for digitization and FFT processing. Use Value: 31.5 dBc image rejection (4.5–6 GHz) and 21 dBm input IP3 enable clean capture of closely spaced signals without reciprocal mixing artifacts. |
Use Scenario: Pulse-Doppler radar transceivers needing low-phase-noise, high-isolation mixing in compact SWaP-constrained platforms. IC Role / Device Role / Timing Role: Single-sideband upconverter generating 4–8.5 GHz transmit waveforms from dc–3.5 GHz I/Q baseband inputs. Use Value: 22.5 dBc sideband rejection and 43 dB LO-to-RF isolation minimize transmit spectral regrowth and receiver desensitization. |
| Microwave Point-to-Point Radios | Aerospace Telemetry Links |
|
Use Scenario: High-capacity backhaul radios operating in licensed 6–8 GHz bands with stringent EVM and ACLR requirements. IC Role / Device Role / Timing Role: Dual-role I/Q mixer supporting both receive (image-reject downconversion) and transmit (SSB upconversion) paths. Use Value: Consistent 0.65 dB amplitude and 0.24° phase balance across temperature ensures stable EVM over −40°C to +85°C operating range. |
Use Scenario: Secure telemetry transmitters in UAVs and satellites where radiation tolerance and thermal stability are mission-critical. IC Role / Device Role / Timing Role: Radiation-hardened-by-process GaAs MMIC mixer used in S-band uplink modulators with dc-coupled IF interface. Use Value: 175°C max junction temperature rating and 250 V HBM ESD protection support operation in high-reliability aerospace environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar I/Q mixer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HMC1048LP4CE | Wider RF range (2–18 GHz), higher conversion loss (12.5 dB typ), larger 4×4 mm QFN package. | Supports broader frequency coverage but trades off noise figure and size-less suitable for Ku-band compact designs. | Select when multi-band coverage outweighs size and loss constraints; requires different footprint and thermal management. |
| ADL5375-05 | Active silicon-based IQ modulator (not passive), 700–1000 MHz IF input, integrated LO buffer, +5 V supply required. | Designed for direct-conversion transmitters-not drop-in for receiver-side image-reject downconversion. | Choose only for active transmitter architectures with baseband DAC interfaces; incompatible with passive, dc-coupled IFx use cases. |
Compared with HMC1048LP4CE and ADL5375-05, the HMC525A-SX offers superior phase/amplitude balance and lower conversion loss within its 4–8.5 GHz band, while maintaining passive operation and dc-coupled IF flexibility-making it optimal for high-performance, size-constrained microwave receivers.
Availability
HMC525A-SX is available at Aetrix Electronics and suitable for microwave point-to-point radios, military radar front ends, and test & measurement instrumentation requiring stable component supply, traceable lot control, and long-term obsolescence mitigation.
Supply support for HMC525A-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
Analog Devices is a global leader in high-performance analog, mixed-signal, and RF ICs, serving precision instrumentation, communications, and defense markets with industry-leading dynamic range and linearity.
The HMC525A-SX belongs to Analog Devices' Hittite Microwave MMIC product line, engineered specifically for broadband microwave signal conditioning in demanding RF front-end applications where size, power efficiency, and phase accuracy are critical.
FAQ
What is the operating temperature range for the HMC525A-SX?
The HMC525A-SX is rated for continuous operation from −40°C to +85°C ambient temperature, with a maximum junction temperature of 175°C. Performance specifications-including conversion loss, image rejection, and balance-are guaranteed across this full range, making the HMC525A-SX suitable for outdoor base stations and airborne radar systems where thermal cycling occurs.
Does the HMC525A-SX require DC biasing?
No, the HMC525A-SX is a passive GaAs MMIC mixer and requires no DC bias voltage or current. All ports (RF, LO, IF1, IF2) are dc-coupled, simplifying interface design and eliminating bias tees, decoupling networks, or power supply dependencies-critical for low-SWaP and high-reliability applications.
How is image rejection achieved with the HMC525A-SX?
Image rejection in the HMC525A-SX relies on internal quadrature generation plus an external 90° hybrid connected to the IF1 and IF2 ports. The datasheet specifies 21–31.5 dBc image rejection under these conditions; performance degrades significantly without the external hybrid due to inherent amplitude/phase imbalance in the bare die implementation.
What LO drive level is recommended for optimal HMC525A-SX performance?
An LO drive of +15 dBm is recommended for the HMC525A-SX to achieve specified conversion loss (≤11 dB), input IP3 (≥17 dBm), and image rejection (≥21 dBc). Drive levels below +13 dBm increase conversion loss; above +17 dBm risk compression and accelerated degradation without improving linearity.
Can the HMC525A-SX be used for both upconversion and downconversion?
Yes, the HMC525A-SX functions bidirectionally: as an image-reject downconverter (RF→IF) or a single-sideband upconverter (IF→RF), depending on signal routing and external hybrid configuration. Its symmetric port design and passive architecture support both modes without reconfiguration-verified in datasheet Figures 7–85.
HMC525A-SX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- Die
- Packaging:
- Tray
- Product Status:
- Active
- RF Type:
- General Purpose
- Frequency:
- 4GHz ~ 8.5GHz
- Number of Mixers:
- 2
- Gain:
- -
- Noise Figure:
- 10.5dB
- Secondary Attributes:
- Up/Down Converter
- Current - Supply:
- -
- Voltage - Supply:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Die
HMC525A-SX FAQ
1.How can I place an order for HMC525A-SX through Aetrix?
Please submit a Request for Quotation (RFQ) for HMC525A-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 HMC525A-SX reliable?
The price and inventory of HMC525A-SX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HMC525A-SX is usually 5 days.
3.What payment methods are accepted for HMC525A-SX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HMC525A-SX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HMC525A-SX?
HMC525A-SX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HMC525A-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 HMC525A-SX?
For technical support, including HMC525A-SX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HMC525A-SX requirements.
6.How does Aetrix verify that HMC525A-SX is sourced from the original manufacturer or authorized distributors?
All HMC525A-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 HMC525A-SX meets industry standards.
7.What is the process for return or replacement of HMC525A-SX?
All HMC525A-SX units undergo pre-shipment inspection (PSI). If there is an issue with HMC525A-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 HMC525A-SX part is unused and in its original packaging.
Return procedure for HMC525A-SX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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