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Analog Devices Inc. HMC683LP6CE
- Part No.:
- HMC683LP6CE
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Mixers
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
HMC683LP6CE.pdf
- Description:
- IC DOWNCONVERTER 2CH 40-QFN
- Quantity:
- Payment:
- Shipping:
Inventory:377
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Product details
Overview
HMC683LP6CE from Analog Devices (formerly Hittite Microwave) is a high-linearity dual-channel RF downconverter IC with integrated LO amplifier and LO switch, operating across 700–1000 MHz RF, 570–900 MHz LO, and 60–500 MHz IF bands. It delivers +23 dBm input IP3, 7.5 dB typical conversion gain, and 50 dB channel-to-channel isolation, enabling simultaneous signal processing in dense cellular base station receivers.
For engineers reviewing the HMC683LP6CE datasheet, HMC683LP6CE pinout, HMC683LP6CE application, or HMC683LP6CE equivalent, this page provides verified RF mixer specifications, functional pin mapping, real-world use cases in LTE/WiMAX infrastructure, and validated alternative options for dual-channel downconversion at 0.7–1.0 GHz.
Technical Context
The HMC683LP6CE integrates two independent Gilbert-cell mixers with on-die LO buffers, a digitally controlled LO switch (LO_SEL), and differential IF amplifiers - all in a single 40-lead 6×6 mm QFN package. Its architecture supports low-side LO injection and delivers broadband IF response from 60 to 500 MHz.
It operates from a single +5 V supply with total ICC of 420–520 mA, features internal baluns for RF inputs, and uses external bias resistors to adjust LO buffer current via BIAS_ADJ1/2 pins. The device maintains stable performance across –40°C to +85°C with 12.5°C channel temperature limit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Frequency Range | 700–1000 MHz - covers GSM, CDMA, LTE Band 5/8/20/28 uplink and downlink segments |
| LO Frequency Range | 570–900 MHz - enables flexible low-side LO injection for 0.7–1.0 GHz RF band |
| IF Frequency Range | 60–500 MHz - supports multiple receive channel plans including 100 MHz IF common in basestations |
| Input IP3 | +23 dBm - ensures robust linearity against strong adjacent-channel interferers in multi-carrier systems |
| Conversion Gain | 7.5 dB typical - reduces need for external IF amplification while maintaining SNR |
| Noise Figure (SSB) | 11 dB - balances sensitivity and dynamic range for high-density receiver front-ends |
| Channel Isolation | 50 dB - prevents crosstalk between parallel receive paths in dual-density architectures |
| LO Drive Requirement | –3 to +3 dBm - simplifies LO chain design by eliminating need for high-power drivers |
Pinout & Package
Package: 40-lead, 6 mm × 6 mm × 0.85 mm RoHS-compliant QFN with exposed thermal paddle; MSL1 rating; max reflow temperature 260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 10 | RF1, RF2 | Differential RF inputs for each channel; require off-chip matching networks per application circuit |
| 2, 9 | TAP1, TAP2 | Center taps of internal RF baluns; must connect to AC ground via external capacitors |
| 3, 5, 8, 15, 16, 22, 23, 26–29, 35, 36 | GND | RF ground connections; all must be soldered to PCB ground plane for optimal isolation and thermal dissipation |
| 4, 7 | BIAS1, BIAS2 | Mixer core bias nodes; set nominal DC operating point per application circuit |
| 6, 17, 18, 24, 33, 34 | Vcc1, Vcc_BAL2, Vcc_AMP2, Vcc2, Vcc_AMP1, Vcc_BAL1 | +5 V supply inputs for mixer cores, baluns, and IF amplifiers; require local bypassing |
| 11, 20, 31, 40 | N/C | No-connect pins; may be tied to RF ground without performance impact |
| 12, 39 | IND1, IND2 | Current-source inductors for IF amplifiers; external 5.1 nH inductors required per channel |
| 13, 14, 37, 38 | IF2P, IF2N, IF1P, IF1N | Differential IF outputs with integrated DC bias; drive 50 Ω loads directly |
| 19, 32 | BIAS_ADJ1, BIAS_ADJ2 | Adjust LO buffer current via external resistor; sets LO drive capability and power consumption |
| 21, 30 | LO2, LO1 | LO inputs for second and first channel; selected via LO_SEL logic level |
| 25 | LO_SEL | LO path selector: 0 V selects LO1, +5 V selects LO2 - enables time-division or diversity LO routing |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel downconversion with LO switch | Enables flexible RF front-end partitioning - e.g., one channel for primary carrier, second for diversity or auxiliary band |
| +23 dBm input IP3 at 0 dBm LO drive | Supports operation in high-interference environments like urban macrocells without external pre-distortion |
| 50 dB channel-to-channel isolation | Prevents intermodulation leakage between parallel receive paths in dual-density basestation designs |
| Integrated LO amplifier and baluns | Reduces external component count by eliminating discrete LO buffers and RF transformers |
| 60–500 MHz IF bandwidth | Accommodates wideband OFDM signals (e.g., 20 MHz LTE, 100 MHz WiMAX) without IF filtering bottlenecks |
| LO_SEL digital control interface | Allows dynamic switching between two independent LO sources using simple TTL-level voltage control |
Applications
| Cellular Basestation Receiver | LTE/WiMAX Diversity Front-End |
|---|---|
|
Use Scenario: Dual-path receive chain in 4G macrocell basestation handling concurrent FDD/TDD carriers. IC Role / Device Role / Timing Role: Primary downconverter for RF-to-IF translation in both main and diversity branches, with LO switching enabling shared LO synthesis. Use Value: +23 dBm IP3 and 50 dB channel isolation maintain EVM < 2.5% under multi-tone interference, meeting 3GPP TR 36.101 conformance. |
Use Scenario: Space-diversity receiver in small-cell access point supporting 2×2 MIMO LTE. IC Role / Device Role / Timing Role: Simultaneous downconversion of spatially separated antenna signals into separate IF paths with matched gain and phase. Use Value: 7.5 dB conversion gain and 11 dB noise figure ensure >15 dB SINAD at –105 dBm input, enabling reliable RSRP measurement across fading channels. |
| GSM/CDMA Dual-Density Repeater | OFDM Multi-Carrier Monitoring Receiver |
|
Use Scenario: In-building repeater aggregating GSM 900 MHz and CDMA 850 MHz uplink bands. IC Role / Device Role / Timing Role: Dual-channel downconverter translating both bands to distinct IF frequencies for parallel digitization. Use Value: 60–500 MHz IF bandwidth allows simultaneous 200 kHz GSM and 1.25 MHz CDMA IF outputs without re-tuning, reducing system latency. |
Use Scenario: Spectrum monitoring receiver capturing wide instantaneous bandwidth in public safety or test equipment. IC Role / Device Role / Timing Role: High-linearity front-end stage converting 700–1000 MHz spectrum segment to baseband-capable IF for ADC sampling. Use Value: +11 dBm input P1dB and +23 dBm IP3 enable capture of –20 dBm to +5 dBm signal clusters without compression or intermodulation distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel RF downconverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HMC684LP6CE | Same 6×6 QFN package, but optimized for 1.7–2.2 GHz RF band; +21 dBm IP3; 45 dB channel isolation | Targets LTE Band 3/4/25 instead of Band 5/8/20; requires different LO planning and matching | Select when operating above 1.5 GHz RF; not suitable for 0.7–1.0 GHz reuse without redesign |
| ADL5365 | Single-channel, 700–1000 MHz downconverter; +27 dBm IP3; no integrated LO switch; 32-lead LFCSP | Requires external LO multiplexer for dual-path use; higher linearity but less integration | Choose for maximum linearity in single-path systems where board space permits discrete LO routing |
Compared with HMC683LP6CE, HMC684LP6CE shifts frequency coverage upward and trades 5 dB isolation for higher-band optimization, while ADL5365 offers superior IP3 but lacks dual-channel integration and LO switching - making HMC683LP6CE uniquely suited for compact, switchable dual-path 0.7–1.0 GHz receivers.
Availability
HMC683LP6CE is available at Aetrix Electronics and suitable for cellular basestation development, LTE small-cell production, and WiMAX repeater manufacturing requiring stable component supply and long-term lifecycle support.
Supply support for HMC683LP6CE 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 RF IC product line with focus on microwave, millimeter-wave, and mixed-signal solutions for communications and defense.
The HMC683LP6CE belongs to Hittite's legacy high-linearity mixer family designed specifically for infrastructure-grade wireless receivers demanding simultaneous dual-channel operation, high IP3, and integrated LO switching in compact SMT packages.
FAQ
What is the recommended LO drive level for optimal performance of the HMC683LP6CE?
The HMC683LP6CE achieves best-in-class +23 dBm input IP3 and 7.5 dB conversion gain at a nominal LO drive of 0 dBm. Operation remains stable across –3 to +3 dBm, allowing flexibility in LO chain design. Driving outside this range risks compression or degraded noise figure. The HMC683LP6CE datasheet specifies all electrical characteristics at 0 dBm LO input unless otherwise noted.
Does the HMC683LP6CE support high-side or low-side LO injection?
The HMC683LP6CE is characterized and optimized for low-side LO injection, as confirmed by the "Unless otherwise noted all measurements with low side LO & IF = 100 MHz" note in its datasheet. While high-side injection may function, it is not guaranteed - RF-to-IF conversion, isolation, and spurious performance are only specified for low-side configuration.
How is LO selection implemented on the HMC683LP6CE?
The HMC683LP6CE uses a single-pin digital control: LO_SEL (Pin 25) selects between LO1 (Pin 30) and LO2 (Pin 21). A 0 V input selects LO1; +5 V selects LO2. This enables time-division or antenna-diversity LO routing without external switches. The truth table in the HMC683LP6CE datasheet defines exact voltage thresholds and timing requirements.
What thermal management is required for continuous operation of the HMC683LP6CE?
The HMC683LP6CE has a thermal resistance of 9.05 °C/W (channel to ground paddle) and a maximum channel temperature of 12.5°C. To sustain full 420–520 mA supply current at +85°C ambient, the exposed paddle must be soldered to a thermally robust ground plane with ≥8 thermal vias (0.3 mm diameter). Derating begins above 85°C at 110.53 mW/°C - critical for basestation deployments.
Can the HMC683LP6CE be used in DC-coupled IF applications?
No - the HMC683LP6CE IF outputs (IF1P/N, IF2P/N) are AC-coupled internally and require external DC blocking capacitors. Its IF amplifiers are biased for 50 Ω AC-coupled loads centered at 0 V. Attempting DC coupling will disrupt bias conditions and degrade gain, noise figure, and linearity. The HMC683LP6CE application circuit explicitly shows 100 pF series capacitors on all IF outputs.
HMC683LP6CE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- RF Type:
- LTE, WiMax
- Frequency:
- 700MHz ~ 1GHz
- Number of Mixers:
- 2
- Gain:
- 7.5dB
- Noise Figure:
- 11dB
- Secondary Attributes:
- Down Converter
- Current - Supply:
- 420mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-SMT (6x6)
HMC683LP6CE FAQ
1.How can I place an order for HMC683LP6CE through Aetrix?
Please submit a Request for Quotation (RFQ) for HMC683LP6CE 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 HMC683LP6CE reliable?
The price and inventory of HMC683LP6CE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HMC683LP6CE is usually 5 days.
3.What payment methods are accepted for HMC683LP6CE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HMC683LP6CE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HMC683LP6CE?
HMC683LP6CE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HMC683LP6CE 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 HMC683LP6CE?
For technical support, including HMC683LP6CE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HMC683LP6CE requirements.
6.How does Aetrix verify that HMC683LP6CE is sourced from the original manufacturer or authorized distributors?
All HMC683LP6CE 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 HMC683LP6CE meets industry standards.
7.What is the process for return or replacement of HMC683LP6CE?
All HMC683LP6CE units undergo pre-shipment inspection (PSI). If there is an issue with HMC683LP6CE, 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 HMC683LP6CE part is unused and in its original packaging.
Return procedure for HMC683LP6CE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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