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Analog Devices Inc. HMC689LP4E
- Part No.:
- HMC689LP4E
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Mixers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
HMC689LP4E.pdf
- Description:
- IC MMIC MIXER BICMOS 24-QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,908
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Product details
Overview
HMC689LP4E from Analog Devices (formerly Hittite Microwave) is a BiCMOS MMIC double-balanced mixer with integrated LO amplifier, designed for RF front-end downconversion and upconversion in 2.0–2.7 GHz systems. It delivers 7.5 dB typical conversion loss, +32 dBm input IP3, and +23 dBm input 1 dB compression at 0 dBm LO drive, operating with +5 V supply and supporting DC–800 MHz differential IF.
For engineers reviewing the HMC689LP4E datasheet, HMC689LP4E pinout, HMC689LP4E application, or HMC689LP4E equivalent, key selection criteria include high-side LO optimization, 24-lead 4×4 mm QFN package compatibility, RF/IF balun integration, and performance validation across -40°C to +85°C for cellular basestation transceivers and WiMAX infrastructure.
Technical Context
The HMC689LP4E implements a passive double-balanced mixer core with on-die RF and LO baluns, coupled to an integrated BiCMOS LO buffer amplifier optimized for high-side injection. Its differential IF output supports DC-coupled operation, while internal biasing enables stable gain and linearity over temperature without external active control loops.
It operates as both upconverter and downconverter with identical RF/LO frequency coverage (2.0–2.7 GHz RF, 2–3 GHz LO), and achieves >26 dB LO-to-RF isolation and >24 dB RF-to-IF isolation - critical for suppressing LO leakage and image interference in FDD LTE and CDMA transceivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Frequency Range | 2.0–2.7 GHz: Covers full LTE Band 7 (2.5–2.7 GHz), Band 1 (1.92–1.98 GHz not supported), and WiMAX 2.3–2.4 GHz bands. |
| LO Frequency Range | 2–3 GHz: Enables high-side LO injection for 2.0–2.7 GHz RF with IF = RF − LO (e.g., 2.5 GHz RF − 2.8 GHz LO = 300 MHz IF). |
| IF Bandwidth | DC–800 MHz: Supports baseband I/Q sampling and wideband OFDM signals without external IF filtering. |
| Conversion Loss | 7.5 dB typ.: Low loss preserves SNR in receiver chains; measured at 300 MHz IF, 0 dBm LO, +5 V supply. |
| Input IP3 | +32 dBm typ.: Enables handling of strong adjacent-channel interferers in multi-carrier GSM/CDMA basestations. |
| Noise Figure (SSB) | 7.5 dB typ.: Directly impacts receiver sensitivity; specified for single-sideband downconversion mode. |
| Supply Current | 152–185 mA at +5 V: Total quiescent draw across Vcc1/Vcc2/Vcc3 pins; enables thermal design for 1.45 W max dissipation. |
Pinout & Package
Package: 24-lead, 4 mm × 4 mm, RoHS-compliant QFN with exposed ground paddle (MSL1, 260 °C peak reflow). All ground leads and paddle must be soldered to PCB RF ground per Hittite application note.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 6, 7, 11–14, 18, 20, 23 | N/C | No connection; may be tied to RF ground without performance impact. |
| 2, 5, 15, 17 | GND | RF/DC ground reference; must connect to low-inductance ground plane. |
| 3 | RF | 50 Ω single-ended RF input; internally DC-short via balun - no external blocking cap required. |
| 4 | TAP | Center tap of RF balun secondary; short to ground with 0 Ω resistor near IC for optimal balance. |
| 8, 10, 24 | Vcc1, Vcc2, Vcc3 | Three independent +5 V supply inputs for LO buffer and mixer core; each requires local 0.1 µF bypass. |
| 9 | LO_BIAS | Adjusts LO buffer current via external resistor; sets LO drive level and power consumption. |
| 16 | LO | 50 Ω single-ended LO input; DC-short via internal balun - no external DC block needed. |
| 19 | G_BIAS | Optional +2.8 V external bias for nominal performance; improves conversion loss stability. |
| 21, 22 | IFN, IFP | Differential 50 Ω IF output; supports DC-coupled I/Q demodulation; use off-chip AC coupling only if DC response not required. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LO amplifier | Eliminates external LO driver stage; accepts -3 to +3 dBm LO drive, reducing system component count and board area. |
| High-side LO optimization | Maximizes LO-to-RF isolation (>26 dB) and suppresses image response in downconverters targeting 300 MHz IF. |
| DC–800 MHz differential IF | Enables direct connection to baseband ADCs/DACs without IF transformers or filters - simplifies I/Q signal chain design. |
| 24-lead 4×4 mm QFN | Compact footprint with exposed paddle ensures repeatable RF grounding and thermal dissipation (27.6 °C/W θJA). |
| Robust operating range | Specified from -40°C to +85°C ambient; maintains +32 dBm IP3 and 7.5 dB conversion loss across full temperature range. |
Applications
| Cellular Basestation Receiver | WiMAX Transmitter |
|---|---|
|
Use Scenario: Downconverting 2.5–2.69 GHz LTE FDD receive signals to 300 MHz IF in macrocell remote radio heads. IC Role / Device Role / Timing Role: Double-balanced mixer with integrated LO amplifier performing RF-to-IF translation and LO amplification in single chip. Use Value: +32 dBm IP3 rejects strong out-of-band interferers; 7.5 dB conversion loss preserves cascaded noise figure; DC–800 MHz IF supports flexible digital channelization. |
Use Scenario: Upconverting 300 MHz baseband I/Q signals to 2.5 GHz WiMAX band for power-amplified transmission. IC Role / Device Role / Timing Role: Active upconverter with integrated LO buffer, enabling direct synthesis-driven transmit paths without discrete LO drivers. Use Value: +23 dBm P1dB handles high crest-factor OFDM waveforms; high LO-to-RF isolation prevents LO leakage into PA input; 24-lead QFN eases RF layout. |
| GSM/CDMA Repeater | 4G Small Cell Transceiver |
|
Use Scenario: Bidirectional signal translation in in-building repeaters covering 2.11–2.17 GHz UMTS and 2.5–2.69 GHz LTE bands. IC Role / Device Role / Timing Role: Dual-mode mixer supporting simultaneous up/down conversion with shared LO path and differential IF interface. Use Value: Pin-compatible with HMC688LP4E for low-side LO variants; 26 dB LO-to-RF isolation minimizes self-interference; 24-lead QFN allows compact dual-channel layout. |
Use Scenario: Integrated transceiver module in outdoor small cells requiring low-power, high-linearity RF front-end for TDD-LTE operation. IC Role / Device Role / Timing Role: Core mixing element in half-duplex TDD architecture, switching between Rx (downconvert) and Tx (upconvert) modes using same LO source. Use Value: Identical RF/LO frequency coverage (2.0–2.7 GHz) simplifies synthesizer design; 152 mA supply current enables efficient power management; RoHS-compliant packaging meets telecom compliance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RF mixer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HMC688LP4E | Same 2.0–2.7 GHz RF range but optimized for low-side LO injection; different LO-to-RF isolation profile and bias configuration. | Preferred for architectures where LO < RF (e.g., 2.5 GHz RF with 2.2 GHz LO → 300 MHz IF); not drop-in compatible due to LO port tuning and G_BIAS dependency. | Select HMC688LP4E only when low-side LO topology is mandated by synthesizer architecture or image rejection requirements. |
| ADL5801ACPZ-R7 | Wider RF range (10 MHz–6 GHz), no integrated LO amplifier, requires external LO driver; 8.5 dB conversion loss, +27 dBm IP3. | Better suited for wideband test equipment or software-defined radios needing frequency agility beyond 2.7 GHz; higher conversion loss increases receiver noise figure. | Choose ADL5801ACPZ-R7 when multi-band flexibility outweighs the need for integrated LO drive and superior linearity in 2.0–2.7 GHz cellular bands. |
Compared with HMC689LP4E, HMC688LP4E offers alternate LO injection topology but requires redesign of LO matching and bias network, while ADL5801ACPZ-R7 trades integration and linearity for broader bandwidth - making HMC689LP4E optimal for fixed-band, high-dynamic-range cellular infrastructure where LO drive simplicity and IP3 are critical.
Availability
HMC689LP4E is available at Aetrix Electronics and suitable for cellular basestation receivers, WiMAX transmitters, and 4G small cell transceivers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for HMC689LP4E 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 acquired Hittite Microwave in 2014 and continues its high-frequency RFIC product line, delivering precision microwave components for communications, defense, and instrumentation markets.
The HMC689LP4E belongs to Hittite's BiCMOS MMIC mixer family, engineered specifically for high-linearity, low-loss signal translation in 2–3 GHz wireless infrastructure - emphasizing integration, thermal robustness, and production-ready RF packaging.
FAQ
What is the recommended LO drive level for optimal performance of the HMC689LP4E?
The HMC689LP4E achieves best conversion loss (7.5 dB typ.) and IP3 (+32 dBm) at 0 dBm LO drive. It accepts -3 to +3 dBm LO input; exceeding +3 dBm risks degradation in LO-to-RF isolation and may exceed absolute maximum ratings. The integrated LO amplifier eliminates need for external driver stages when using synthesizers with 0 dBm output.
Does the HMC689LP4E support DC-coupled IF operation?
Yes, the HMC689LP4E supports true DC-coupled differential IF operation via pins 21 (IFN) and 22 (IFP), matched to 50 Ω differential impedance. For non-DC applications, external AC-coupling capacitors are recommended to block DC offset; no internal DC blocking is present, enabling direct interface to baseband ADCs/DACs.
Is the HMC689LP4E pin-compatible with other Hittite mixers like the HMC688LP4E?
No, the HMC689LP4E is not pin-compatible with the HMC688LP4E despite identical package and pin count. Their LO port configurations, bias networks (G_BIAS vs. LO_BIAS), and internal balun topologies differ - requiring separate PCB layouts and matching networks. The datasheet states "pin for pin compatible" only in functional context, not mechanical or electrical pin mapping.
What is the role of the TAP pin (Pin 4) on the HMC689LP4E?
Pin 4 (TAP) is the center tap of the internal RF balun's secondary winding. It must be shorted to RF ground with a 0 Ω resistor placed as close as possible to the IC to ensure balanced operation and maximize LO-to-RF isolation. Leaving it floating degrades conversion loss and increases even-order distortion.
Can the HMC689LP4E be used in both upconversion and downconversion modes?
Yes, the HMC689LP4E is fully bidirectional: it functions as both upconverter (IF → RF) and downconverter (RF → IF) within its specified 2.0–2.7 GHz RF and 2–3 GHz LO ranges. Performance metrics including conversion loss, IP3, and isolation are validated for both modes in the datasheet, with identical RF/LO frequency coverage enabling flexible transceiver reuse.
HMC689LP4E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Strip
- Product Status:
- Obsolete
- RF Type:
- LTE, WiMax
- Frequency:
- 2GHz ~ 2.7GHz
- Number of Mixers:
- 1
- Gain:
- -
- Noise Figure:
- 7.5dB
- Secondary Attributes:
- Up/Down Converter
- Current - Supply:
- 152mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (4x4)
HMC689LP4E FAQ
1.How can I place an order for HMC689LP4E through Aetrix?
Please submit a Request for Quotation (RFQ) for HMC689LP4E 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 HMC689LP4E reliable?
The price and inventory of HMC689LP4E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HMC689LP4E is usually 5 days.
3.What payment methods are accepted for HMC689LP4E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HMC689LP4E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HMC689LP4E?
HMC689LP4E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HMC689LP4E 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 HMC689LP4E?
For technical support, including HMC689LP4E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HMC689LP4E requirements.
6.How does Aetrix verify that HMC689LP4E is sourced from the original manufacturer or authorized distributors?
All HMC689LP4E 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 HMC689LP4E meets industry standards.
7.What is the process for return or replacement of HMC689LP4E?
All HMC689LP4E units undergo pre-shipment inspection (PSI). If there is an issue with HMC689LP4E, 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 HMC689LP4E part is unused and in its original packaging.
Return procedure for HMC689LP4E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HMC689LP4E Tags
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ADEX-10+
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ADE-2+
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ADE-1+
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LTC5562IUC#TRPBF
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MAX2681EUT+T
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ADE-1ASK+
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ADE-1L+
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