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Analog Devices Inc. HMC485AMS8GETR
- Part No.:
- HMC485AMS8GETR
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Mixers
- Package:
- -
- Datasheet:
-
HMC485AMS8GETR.pdf
- Description:
- IC MMIC MIXER HI IP3 8-MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,966
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Product details
Overview
HMC485AMS8GETR from Analog Devices is a GaAs MMIC I/Q mixer with integrated LO amplifier, operating from 1.7–2.4 GHz RF, delivering 34 dBm input IP3 (downconversion), 9 dB typical conversion loss, and 5 V/45 mA single-supply operation in an MSOP-8 package - ideal for GSM/UMTS infrastructure receivers and transmitters.
For engineers reviewing the HMC485AMS8GETR datasheet, HMC485AMS8GETR pinout, HMC485AMS8GETR application, or HMC485AMS8GETR equivalent, key selection criteria include its high IP3 vs. LO drive sensitivity (0 dBm typical), IF bandwidth (50–300 MHz), LO-to-RF isolation (10 dB), and compatibility with low-side LO architectures in PCS/UMTS base stations.
Technical Context
The HMC485AMS8GETR integrates a GaAs MMIC passive mixer core with a monolithic LO amplifier, enabling self-contained LO drive without external amplification. Its I/Q architecture supports image-reject downconversion and complex upconversion, with dc-coupled IF and RF ports and ac-coupled LO port.
It operates as a double-balanced mixer with inherent LO leakage suppression and achieves high linearity via optimized GaAs FET topology. The 50 Ω matched RF/LO ports simplify impedance matching, while the 5 V bias on Pin 4 powers only the internal LO amplifier - no RF path biasing required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Frequency Range | 1.7–2.4 GHz: Covers full PCS/UMTS bands for base station transceivers and CMTS systems. |
| Input IP3 (Downconv.) | 34 dBm typical: Enables handling of strong interferers in dense cellular environments without distortion. |
| Conversion Loss | 9 dB typical: Defines signal attenuation from RF to IF; impacts receiver noise figure and transmit output power efficiency. |
| LO Drive Level | 0 dBm typical: Eliminates need for external LO buffer stages, reducing BOM count and layout complexity. |
| IF Frequency Range | 50–300 MHz: Supports low-side LO configurations for UMTS/PCS receive and transmit IF plans. |
| LO to RF Isolation | 10 dB minimum: Limits LO feedthrough into antenna path, easing front-end filtering requirements. |
| Supply Current | 45 mA at 5 V: Determines power budget for LO amplifier section only; RF/IF paths are passive. |
Pinout & Package
Package: 8-lead MSOP (Mini Small Outline Package), RoHS-compliant, MSL1, exposed paddle for thermal grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (LO) | Local Oscillator Input | AC-coupled 50 Ω port; accepts 0 dBm LO drive; requires external AC coupling if DC source used. |
| 2 (NIC) | No Internal Connection | Unbonded pad; must be left floating or grounded per layout best practice - no electrical function. |
| 3, 6, 7 (GND) | RF/DC Ground Connect | Direct connection points to ground plane; critical for RF return path integrity and thermal dissipation via paddle. |
| 4 (Vdd) | LO Amplifier Supply | 5 V DC input for integrated LO amplifier; requires local bypass capacitor (e.g., 100 nF + 10 pF). |
| 5 (IF) | Intermediate Frequency Output/Input | DC-coupled port; supports baseband/IQ signals to 50 MHz; max ±40 mA DC current to avoid damage. |
| 8 (RF) | Radio Frequency Input/Output | DC-coupled 50 Ω port; handles up to +19 dBm P1dB; matches directly to 50 Ω antenna or PA chain. |
Key Features
| Feature | Design Value |
|---|---|
| I/Q Mixer Architecture | Enables image-reject downconversion and complex modulation/demodulation without external hybrids or phase shifters. |
| Integrated LO Amplifier | Reduces system-level LO chain components; eliminates discrete driver stage and associated matching networks. |
| High Input IP3 (34 dBm) | Outperforms many active mixers in dynamic range while maintaining passive mixer reliability and temperature stability. |
| Ultra-Small MSOP-8 Footprint (14.8 mm²) | Enables compact RF front-end layouts in space-constrained macro/micro base station modules and CMTS line cards. |
| 50–300 MHz IF Bandwidth | Supports both low-IF and zero-IF UMTS/PCS architectures with minimal external filtering requirements. |
Applications
| Cellular Base Station Receiver | Cable Modem Termination System (CMTS) |
|---|---|
Use Scenario: Downconverting 1.9–2.0 GHz UMTS uplink signals to 140–200 MHz IF in macrocell BTS receive chains. IC Role / Device Role / Timing Role: I/Q mixer providing image-reject demodulation with integrated LO amplification and 34 dBm IP3 linearity. Use Value: Enables coexistence with adjacent-band interferers without front-end attenuation, preserving SNR in multi-carrier deployments. | Use Scenario: Transmit path upconversion of 50–100 MHz DOCSIS upstream channels to 5–42 MHz RF band in CMTS edge QAM modulators. IC Role / Device Role / Timing Role: Passive I/Q mixer with dc-coupled IF supporting baseband IQ inputs and low-side LO injection. Use Value: Delivers 9 dB conversion loss and 25 dB LO-to-IF isolation, minimizing LO leakage into sensitive upstream receive paths. |
| GSM/EDGE Transmitter | W-CDMA Femtocell Transceiver |
Use Scenario: Upconverting 130–200 MHz IF signals to 1.8–1.9 GHz GSM/EDGE transmit band using low-side LO. IC Role / Device Role / Timing Role: High-linearity I/Q mixer with integrated LO amplifier driving 0 dBm LO and accepting +19 dBm RF input. Use Value: Achieves 27 dBm upconversion IP3 and avoids compression in multi-tone EDGE transmission scenarios. | Use Scenario: Compact transceiver module in residential femtocells requiring full-duplex operation across 2.1 GHz W-CDMA bands. IC Role / Device Role / Timing Role: Dual-role I/Q mixer for simultaneous receive (downconversion) and transmit (upconversion) with shared LO path. Use Value: Reduces component count by integrating LO amplifier and enabling single-supply 5 V operation across both paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-IP3 I/Q mixer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HMC774ALC3 | Wider RF range (1.7–4.2 GHz), higher IP3 (36 dBm), but requires −5 V LO bias and larger 3×3 mm QFN. | Supports LTE Band 42/43 and 5G NR n77; not drop-in due to voltage and package mismatch. | Select when extending beyond 2.4 GHz or needing >34 dBm IP3; redesign required for bias and layout. |
| ADL5375-05 | Active IQ modulator (not passive mixer), 0.3–6 GHz, 5 V supply, but higher noise figure (13 dB) and lower IP3 (28 dBm). | Targets direct-conversion transmitters; lacks integrated LO amp and requires external LO buffering. | Prefer for wideband zero-IF TX where LO drive flexibility matters more than IP3; not suitable for high-dynamic-range RX. |
Compared with HMC774ALC3 and ADL5375-05, the HMC485AMS8GETR offers optimal balance of 1.7–2.4 GHz coverage, 34 dBm IP3, integrated LO drive, and MSOP-8 footprint - making it uniquely suited for cost- and size-sensitive UMTS/GSM infrastructure designs where LO simplicity and linearity are prioritized over ultra-wideband operation.
Availability
HMC485AMS8GETR is available at Aetrix Electronics and suitable for GSM/UMTS base station receivers, Cable Modem Termination Systems (CMTS), and W-CDMA femtocell transceivers requiring stable component supply and long-term production continuity.
Supply support for HMC485AMS8GETR 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 RF ICs, serving communications, industrial, and aerospace markets with precision signal processing solutions.
The HMC485AMS8GETR belongs to the Hittite Microwave (now part of Analog Devices) GaAs MMIC mixer product line, designed specifically for high-linearity, frequency-agile wireless infrastructure applications demanding robust IP3 performance and compact integration.
FAQ
What is the recommended LO drive level for optimal performance of the HMC485AMS8GETR?
The HMC485AMS8GETR achieves its specified 34 dBm input IP3 and 9 dB conversion loss at a nominal LO drive level of 0 dBm. Drive levels between −2 dBm and +4 dBm are supported per datasheet; exceeding +4 dBm may cause saturation or reliability risk. The integrated LO amplifier enables this low drive requirement, eliminating external buffer stages in most designs.
Can the HMC485AMS8GETR be used for both upconversion and downconversion?
Yes, the HMC485AMS8GETR supports both upconversion and downconversion modes. In downconversion, RF is input and IF is output; in upconversion, IF is input and RF is output. Its I/Q architecture maintains image rejection in both directions, and datasheet specs (e.g., 27 dBm upconversion IP3) confirm bidirectional linearity under appropriate LO/IF configuration.
Is the IF port of the HMC485AMS8GETR dc-coupled, and what are the current limits?
Yes, the IF port (Pin 5) of the HMC485AMS8GETR is dc-coupled and rated for ±40 mA maximum DC current. Exceeding this limit risks device malfunction or permanent damage. For ac-only IF signals, external series capacitors may be added, but dc coupling is required for baseband or zero-IF operation - consistent with its use in direct-conversion transceivers.
What is the thermal management requirement for continuous operation of the HMC485AMS8GETR?
The HMC485AMS8GETR features an exposed paddle for thermal conduction. For continuous operation at +85°C ambient, the package must be soldered to a thermally robust ground plane with ≥6 vias connecting top and bottom layers. Absolute max channel temperature is +150°C; derating begins above +85°C, and thermal resistance (junction-to-paddle) is optimized for MSOP-8 mounting per Analog Devices' evaluation board layout guidelines.
Does the HMC485AMS8GETR require external matching networks on RF or LO ports?
No, the RF and LO ports of the HMC485AMS8GETR are internally matched to 50 Ω. The RF port (Pin 8) and LO port (Pin 1) are designed for direct connection to 50 Ω transmission lines without external matching components - simplifying PCB layout and improving repeatability across production units. Only the IF port may require external filtering depending on application bandwidth.
HMC485AMS8GETR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- RF Type:
- CDMA, GSM, WCDMA
- Frequency:
- 1.7GHz ~ 2.4GHz
- Number of Mixers:
- 1
- Gain:
- -
- Noise Figure:
- 9.5dB
- Secondary Attributes:
- -
- Current - Supply:
- 45mA
- Voltage - Supply:
- 5V
- Mounting Type:
- -
- Supplier Device Package:
- -
HMC485AMS8GETR FAQ
1.How can I place an order for HMC485AMS8GETR through Aetrix?
Please submit a Request for Quotation (RFQ) for HMC485AMS8GETR 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 HMC485AMS8GETR reliable?
The price and inventory of HMC485AMS8GETR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HMC485AMS8GETR is usually 5 days.
3.What payment methods are accepted for HMC485AMS8GETR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HMC485AMS8GETR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HMC485AMS8GETR?
HMC485AMS8GETR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HMC485AMS8GETR 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 HMC485AMS8GETR?
For technical support, including HMC485AMS8GETR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HMC485AMS8GETR requirements.
6.How does Aetrix verify that HMC485AMS8GETR is sourced from the original manufacturer or authorized distributors?
All HMC485AMS8GETR 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 HMC485AMS8GETR meets industry standards.
7.What is the process for return or replacement of HMC485AMS8GETR?
All HMC485AMS8GETR units undergo pre-shipment inspection (PSI). If there is an issue with HMC485AMS8GETR, 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 HMC485AMS8GETR part is unused and in its original packaging.
Return procedure for HMC485AMS8GETR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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