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Analog Devices Inc. HMC485AMS8GE
- Part No.:
- HMC485AMS8GE
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Mixers
- Package:
- -
- Datasheet:
-
HMC485AMS8GE.pdf
- Description:
- IC MMIC MIXER HI IP3 8-MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,423
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Product details
Overview
HMC485AMS8GE from Analog Devices is a GaAs MMIC I/Q mixer with integrated LO amplifier, operating from 1.7–2.4 GHz RF and 1.4–2.35 GHz LO, delivering 34 dBm input IP3 (downconversion), 9 dB typical conversion loss, and 5 V/45 mA single-supply operation - ideal for GSM/CDMA/UMTS infrastructure base stations requiring high linearity and compact footprint.
For engineers reviewing the HMC485AMS8GE datasheet, HMC485AMS8GE pinout, HMC485AMS8GE application, or HMC485AMS8GE equivalent, key selection criteria include its 34 dBm IP3 at 0 dBm LO drive, 50–300 MHz IF bandwidth supporting low-side LO configurations, MSOP-8 package thermal rating up to +85°C, and verified LO-to-RF/IF isolation of 10 dB and 25 dB respectively.
Technical Context
The HMC485AMS8GE implements a passive double-balanced mixer core with monolithically integrated GaAs LO amplifier, enabling direct 0 dBm LO drive without external amplification. Its I/Q architecture supports image-reject downconversion and complex modulation schemes in UMTS/PCS transceivers.
It operates with a single 5 V supply powering only the LO amplifier stage; RF, IF, and LO ports are all 50 Ω matched, with dc-coupled IF and RF, ac-coupled LO, and ground-connected pins (3,6,7) plus exposed paddle for thermal and RF grounding.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Frequency Range | 1.7–2.4 GHz - covers full PCS/UMTS Band I & II for cellular infrastructure transmit/receive paths. |
| Input IP3 (Downconv.) | 34 dBm - enables handling of strong interferers in dense multi-carrier base station environments. |
| Conversion Loss | 9 dB typical - defines signal path gain budget; lower loss reduces cascaded noise figure impact. |
| LO to IF Isolation | 25 dB - suppresses LO leakage into IF chain, critical for ADC dynamic range preservation. |
| Supply | 5 V @ 45 mA - powers only internal LO amplifier; no bias required on RF/IF/LO signal paths. |
| IF Bandwidth | 50–300 MHz - supports wideband digital predistortion (DPD) and envelope tracking feedback loops. |
| Operating Temp. | −40°C to +85°C - qualified for outdoor macrocell and remote radio head deployment. |
Pinout & Package
Package: 8-lead RoHS-compliant MSOP with exposed ground paddle; MSL1 rated, 260°C peak reflow; marking "H485A".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | LO | AC-coupled 50 Ω local oscillator input; requires external DC blocking if driven with dc-offset signal. |
| 2 | NIC | No internal connection; must remain unconnected and not tied to ground or voltage. |
| 3, 6, 7 | GND | RF/dc ground terminals; require low-inductance vias to inner/outer ground planes and soldered paddle contact. |
| 4 | Vdd | 5 V supply for integrated LO amplifier; requires local 100 nF + 10 µF bypassing per datasheet layout guidelines. |
| 5 | IF | DC-coupled intermediate frequency port; max ±40 mA dc current; series capacitor needed if dc blocking required. |
| 8 | RF | DC-coupled 50 Ω radio frequency input/output; matched for broadband operation across 1.7–2.4 GHz. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LO amplifier | Eliminates external LO buffer stage, reducing BOM count and board area while maintaining 0 dBm drive requirement. |
| I/Q architecture | Enables image-reject mixing and quadrature demodulation for zero-IF receivers and complex modulators. |
| 34 dBm input IP3 | Matches performance of active FET mixers while using passive core - improves reliability and reduces power consumption. |
| MSOP-8 footprint (14.8 mm²) | Provides >50% area reduction vs. comparable SMT mixers in SOIC or QFN packages, easing high-density RF layout. |
| 50–300 MHz IF bandwidth | Supports both narrowband (e.g., W-CDMA 5 MHz) and wideband (e.g., LTE 100 MHz) channelization schemes. |
Applications
| Cellular Base Station Transceiver | UMTS/W-CDMA Femtocell |
|---|---|
Use Scenario: Downconverting 2.1 GHz UMTS Band I signals to 190–210 MHz IF in macrocell BTS receive chains with co-located high-power transmitters. IC Role / Device Role / Timing Role: I/Q mixer performing image-reject downconversion with integrated LO amplification and 34 dBm IP3 linearity. Use Value: Enables >100 dB adjacent channel rejection without external preselection filtering due to high IP3 and 25 dB LO–IF isolation. | Use Scenario: Transmit path upconversion in residential femtocells operating in Band I (1920–1980 MHz UL), requiring low EVM under high PAPR LTE signals. IC Role / Device Role / Timing Role: Passive I/Q mixer with integrated LO driver, configured for low-side LO injection and 50–300 MHz IF input. Use Value: Delivers 27 dBm upconversion IP3 and 9 dB conversion loss, minimizing PA backoff and improving power efficiency. |
| GSM/EDGE Macrocell Receiver | Cable Modem Termination System (CMTS) |
Use Scenario: Multi-carrier GSM receiver front-end handling 8–12 simultaneous 200 kHz channels in 900/1800 MHz bands with strong out-of-band blockers. IC Role / Device Role / Timing Role: High-dynamic-range passive mixer with 5 V–powered LO amplifier, operating at 0 dBm LO drive. Use Value: 34 dBm IP3 and −40°C to +85°C rating ensure stable performance across temperature and carrier aggregation scenarios. | Use Scenario: Downconverting DOCSIS 3.1 upstream burst signals (5–85 MHz) from 1.2–1.8 GHz RF to baseband in CMTS headend receivers. IC Role / Device Role / Timing Role: I/Q mixer used in zero-IF architecture with 50–300 MHz IF bandwidth and dc-coupled IF output. Use Value: Supports full DOCSIS 3.1 upstream channel bonding (up to 192 MHz aggregate BW) via wide IF response and low conversion loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar I/Q mixer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HMC558ALP5E | Wider RF range (1.7–3.5 GHz), higher 37 dBm IP3, but requires −2 dBm LO drive and uses LP5 package (5×5 mm). | Supports LTE-TDD and WiMAX bands beyond 2.4 GHz; less suitable for space-constrained PCBs needing MSOP footprint. | Select when extended frequency coverage or higher linearity outweighs package size constraints. |
| ADL5375-05 | Active IQ modulator (not passive mixer), 0.3–3.8 GHz RF, 5 V/120 mA, includes on-chip LO divider and bias control. | Targets direct-conversion transmitter architectures; lacks integrated LO amplifier and requires external LO synthesis. | Select for modulator-based transmitters where baseband IQ interface and LO division are required. |
Compared with HMC558ALP5E and ADL5375-05, the HMC485AMS8GE offers optimal balance of 34 dBm IP3, MSOP-8 compactness, and integrated LO drive for fixed 1.7–2.4 GHz infrastructure receivers - avoiding LO buffer design complexity while fitting tight RF module layouts.
Availability
HMC485AMS8GE is available at Aetrix Electronics and suitable for cellular base station transceivers, UMTS femtocells, GSM/EDGE macrocell receivers, and cable modem termination systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for HMC485AMS8GE 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 digital signal processing semiconductors, headquartered in Norwood, MA.
The HMC485AMS8GE belongs to the Hittite Microwave (acquired by Analog Devices) high-frequency MMIC product line, designed specifically for wireless infrastructure applications demanding high linearity, integration, and reliability in compact SMT packages.
FAQ
What is the recommended LO drive level for optimal performance of the HMC485AMS8GE?
The HMC485AMS8GE is characterized and optimized for 0 dBm LO drive, delivering 34 dBm input IP3 and 9 dB conversion loss at this level. LO drive between −2 dBm and +4 dBm is supported per datasheet, but deviation from 0 dBm degrades IP3 and increases conversion loss. The integrated LO amplifier eliminates need for external LO buffers when driving at 0 dBm.
Can the HMC485AMS8GE be used for upconversion, and what is its upconversion IP3?
Yes, the HMC485AMS8GE supports upconversion with 27 dBm input IP3 (typical) at 0 dBm LO drive. Its I/Q architecture allows flexible configuration as either upconverter or downconverter. For upconversion, the IF port serves as input and RF port as output, maintaining 50–300 MHz IF bandwidth and 9 dB conversion loss.
Is the HMC485AMS8GE pin-compatible with other Hittite MMIC mixers in MSOP-8 packages?
No, the HMC485AMS8GE has a unique pinout: Pin 4 is Vdd (not GND), Pin 5 is IF (dc-coupled), and Pins 3/6/7 are GND. It is not pin-compatible with HMC558ALP5E (LP5) or HMC438MS8G (different function assignment). Layout must follow the specific HMC485AMS8GE pin map shown in the datasheet.
What is the maximum allowable dc current on the IF port of the HMC485AMS8GE?
The IF port of the HMC485AMS8GE must not source or sink more than ±40 mA dc current. Exceeding this limit risks device malfunction or permanent damage. For dc-coupled IF interfaces, ensure baseband driver or ADC input bias networks comply with this specification; use series capacitors if dc blocking is required.
Does the HMC485AMS8GE require external matching components for 50 Ω operation?
No - all RF, LO, and IF ports are internally matched to 50 Ω. The RF and LO ports are ac-coupled (LO) or dc-coupled (RF) with integrated matching; the IF port is dc-coupled and matched. External matching is unnecessary, though proper PCB grounding (vias to ground plane, exposed paddle soldering) is mandatory for specified RF performance.
HMC485AMS8GE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- -
- Packaging:
- Strip
- 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:
- -
HMC485AMS8GE FAQ
1.How can I place an order for HMC485AMS8GE through Aetrix?
Please submit a Request for Quotation (RFQ) for HMC485AMS8GE 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 HMC485AMS8GE reliable?
The price and inventory of HMC485AMS8GE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HMC485AMS8GE is usually 5 days.
3.What payment methods are accepted for HMC485AMS8GE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HMC485AMS8GE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HMC485AMS8GE?
HMC485AMS8GE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HMC485AMS8GE 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 HMC485AMS8GE?
For technical support, including HMC485AMS8GE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HMC485AMS8GE requirements.
6.How does Aetrix verify that HMC485AMS8GE is sourced from the original manufacturer or authorized distributors?
All HMC485AMS8GE 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 HMC485AMS8GE meets industry standards.
7.What is the process for return or replacement of HMC485AMS8GE?
All HMC485AMS8GE units undergo pre-shipment inspection (PSI). If there is an issue with HMC485AMS8GE, 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 HMC485AMS8GE part is unused and in its original packaging.
Return procedure for HMC485AMS8GE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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