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Analog Devices Inc./Maxim Integrated MAX2624EUA+
- Part No.:
- MAX2624EUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- VCOs (Voltage Controlled Oscillators)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Description:
- IC SELF-CONTAINED VCO 8-UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,847
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Product details
Overview
MAX2624EUA+ from Maxim Integrated is a monolithic voltage-controlled oscillator (VCO) designed for RF local oscillator generation in 902–928MHz ISM-band systems with 45–70MHz IF. It delivers −3dBm output power, 947–998MHz frequency range, 75–100kHz/V tuning gain, and −101dBc/Hz phase noise at 100kHz offset. The device operates from +2.7V to +5.5V, draws 8mA supply current, and features integrated 50Ω output matching.
For engineers reviewing the MAX2624EUA+ datasheet, MAX2624EUA+ pinout, MAX2624EUA+ application, or MAX2624EUA+ equivalent, key selection criteria include guaranteed VCO frequency span across temperature, low-phase-noise performance at ISM-band frequencies, shutdown current of 0.1µA, on-chip tank integration eliminating external inductors, and dual VCC/GND separation for output buffer isolation.
Technical Context
The MAX2624EUA+ implements an LC-based differential oscillator core with fully integrated tank components-including on-die inductor and varactor-enabling module-level functionality in an 8-pin µMAX package. Its TUNE pin accepts 0.4V–2.4V control voltage, directly modulating the integrated varactor to achieve factory-trimmed frequency span.
It features separate VCC and GND pins for oscillator core and output buffer (pins 6/3 and 5/8), minimizing load-pulling effects. The buffered 50Ω output drives RF mixers directly without external DC blocking, and shutdown is controlled via high-impedance SHDN pin (pin 4) asserting logic-low to reduce current to 0.1µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Oscillator Frequency Range | 947MHz to 998MHz - guaranteed factory-trimmed span for 902–928MHz ISM-band applications with 45–70MHz IF. |
| Output Power | −3dBm - sufficient to drive standard RF mixers without external amplification. |
| Phase Noise | −101dBc/Hz at 100kHz offset - meets spectral purity requirements for ISM-band transceivers. |
| Tuning Gain | 75–100kHz/V - enables precise frequency control with standard PLL loop filters. |
| Supply Voltage | +2.7V to +5.5V - supports single-supply operation across battery and regulated rail systems. |
| Shutdown Current | 0.1µA - enables ultra-low-power sleep modes in portable and duty-cycled RF systems. |
| Harmonics | −27dBc - suppresses second harmonic, reducing filtering burden in front-end design. |
Pinout & Package
MAX2624EUA+ uses an 8-pin µMAX package (3mm × 3mm, 0.5mm pitch), thermally enhanced with exposed paddle. Pin 1 is N.C.; pins 3 and 8 are dedicated ground connections for oscillator core and output buffer respectively; dual VCC pins (5 and 6) enable independent supply decoupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (N.C.) | No Connection | Not internally bonded - must remain unconnected on PCB. |
| 2 (TUNE) | Voltage-Controlled Tuning Input | High-impedance node accepting 0.4V–2.4V analog control voltage; connects directly to PLL loop filter output. |
| 3 (GND) | Oscillator Core Ground | Low-inductance return path for oscillator circuitry; requires direct connection to ground plane under package. |
| 4 (SHDN) | Shutdown Control Input | Logic-level input: ≤0.6V disables oscillator and buffer, reducing supply current to 0.1µA. |
| 5 (VCC) | Output Buffer Supply | Dedicated 2.7–5.5V supply for output stage; bypassed with 220pF capacitor to pin 8 for RF stability. |
| 6 (VCC) | Oscillator Core Supply | Dedicated 2.7–5.5V supply for LC core; bypassed with 220pF capacitor to pin 3 for low-noise operation. |
| 7 (OUT) | Buffered RF Output | 50Ω-matched, DC-coupled RF output delivering −3dBm; drives mixers/synthesizers directly. |
| 8 (GND) | Output Buffer Ground | Isolated ground return for output amplifier; prevents load-pulling via shared impedance with oscillator ground. |
Key Features
| Feature | Design Value |
|---|---|
| Fully monolithic LC VCO core | On-die inductor and varactor eliminate external tank components, reducing BOM count and layout sensitivity. |
| Dual isolated VCC/GND pairs | Separate supplies and grounds for oscillator core and output buffer minimize supply coupling and load-pulling effects. |
| Factory-trimmed frequency range | Guaranteed 947–998MHz span over −40°C to +85°C eliminates system-level calibration. |
| Integrated 50Ω output match | Enables direct connection to 50Ω transmission lines or mixer inputs without external matching networks. |
| Low-noise shutdown mode | 0.1µA quiescent current allows rapid power cycling in time-division systems without compromising startup stability. |
Applications
| ISM-Band Wireless Sensor Networks | 902–928MHz RFID Readers |
|---|---|
Use Scenario: Battery-powered sensor nodes transmitting telemetry in unlicensed 902–928MHz band using FSK or OOK modulation. IC Role / Device Role / Timing Role: Local oscillator generating carrier frequency for upconversion in transmitter chain. Use Value: Factory-trimmed 947–998MHz range ensures regulatory compliance without per-unit calibration; 0.1µA shutdown extends multi-year battery life. | Use Scenario: Fixed or mobile RFID readers interrogating UHF tags with 45–70MHz IF architecture. IC Role / Device Role / Timing Role: LO source for receiver downconversion, synchronized to baseband processor timing. Use Value: −101dBc/Hz phase noise at 100kHz offset preserves EVM in dense multipath environments; dual VCC/GND isolation maintains LO stability during high-current tag bursts. |
| Industrial Remote Monitoring Transceivers | Low-Power IoT Gateways |
Use Scenario: Enclosed industrial gateways operating in harsh environments, requiring reliable RF links over 1km line-of-sight. IC Role / Device Role / Timing Role: Transmit/receive LO in half-duplex transceiver supporting adaptive frequency hopping. Use Value: Guaranteed frequency span across −40°C to +85°C eliminates thermal drift compensation firmware; 75–100kHz/V tuning gain enables fast hop settling. | Use Scenario: Edge gateway aggregating data from hundreds of BLE/Zigbee sub-devices, with embedded 902–928MHz backhaul. IC Role / Device Role / Timing Role: Primary LO for 45–70MHz IF receiver front-end in multi-channel baseband processing. Use Value: −27dBc harmonics reduce need for external bandpass filtering; 8mA active current enables concurrent RF and MCU operation within 100mW thermal budget. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar VCO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX2623EUA+ | Frequency range 885–950MHz; higher tuning gain (280kHz/V); optimized for DECT and 902–928MHz ISM with ±10.7MHz IF. | Targets different IF architecture (±10.7MHz vs. 45–70MHz); not suitable where wider IF bandwidth required. | Select MAX2623EUA+ only when system IF is ±10.7MHz and center frequency falls within 885–950MHz. |
| LMX2531LQ1770E/NOPB | Integrated PLL + VCO; 1770MHz max output; requires external loop filter; higher power (22mA); SPI programmable. | Supports frequency synthesis and fractional-N operation; not a standalone VCO; adds complexity for simple LO generation. | Choose LMX2531LQ1770E/NOPB only when programmable frequency agility or integrated PLL functionality is required. |
Compared with MAX2624EUA+, MAX2623EUA+ offers higher tuning sensitivity but narrower target IF compatibility, while LMX2531LQ1770E/NOPB provides programmability at the cost of increased supply current, external component count, and design complexity-making MAX2624EUA+ optimal for fixed-frequency, low-power, low-component-count ISM-band LO designs.
Availability
MAX2624EUA+ is available at Aetrix Electronics and suitable for wireless sensor networks, RFID readers, and industrial remote monitoring systems requiring stable component supply, guaranteed frequency performance across temperature, and minimal external component count.
Supply support for MAX2624EUA+ 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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and RF ICs for industrial, communications, and consumer applications.
The MAX262x family targets compact, low-power RF systems needing plug-and-play VCO functionality-designed specifically for ISM-band transceivers where board space, power, and calibration effort are critical constraints.
FAQ
What frequency range does the MAX2624EUA+ cover, and is it guaranteed over temperature?
The MAX2624EUA+ covers 947MHz to 998MHz, with this full span guaranteed over the industrial temperature range of −40°C to +85°C. Factory trimming ensures no unit-to-unit variation or thermal drift compensation is needed in final systems, simplifying design validation and production testing for 902–928MHz ISM-band applications.
Does the MAX2624EUA+ require external matching components at the RF output?
No, the MAX2624EUA+ integrates a 50Ω output match on-die, enabling direct connection to 50Ω transmission lines or RF mixer inputs without external matching networks or DC-blocking capacitors. This eliminates two passive components per channel and reduces layout sensitivity in high-frequency routing.
How does the dual VCC/GND architecture improve performance in the MAX2624EUA+?
The MAX2624EUA+ uses separate VCC (pins 5 and 6) and GND (pins 3 and 8) connections for the oscillator core and output buffer. This isolation prevents supply noise and load transients from modulating the VCO core, reducing spurious content and improving phase noise stability-especially critical when driving nonlinear mixer stages in real-world RF layouts.
What is the tuning voltage range and input impedance of the TUNE pin on the MAX2624EUA+?
The TUNE pin (pin 2) of the MAX2624EUA+ accepts a 0.4V to 2.4V analog control voltage with high input impedance (>1MΩ). This range corresponds linearly to the full 947–998MHz output span and is compatible with standard charge-pump PLL loop filters without level-shifting or buffering circuitry.
Can the MAX2624EUA+ be used in battery-powered applications with strict power budgets?
Yes-the MAX2624EUA+ draws only 8mA during operation and reduces to just 0.1µA in shutdown mode when SHDN (pin 4) is pulled low. This ultra-low standby current enables aggressive power-gating strategies in battery-powered ISM-band devices, supporting multi-year operation in wireless sensors and remote monitors without sacrificing RF performance.
MAX2624EUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- MAX2624
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Frequency Range:
- 947 ~ 998MHz
- Frequency - Center:
- 972.5MHz
- Voltage - Supply:
- 2.7V ~ 5.5V
- Tuning Voltage (VDC):
- 0.4 V ~ 2.4 V
- 2nd Harmonic, Typ (dBc):
- -27
- Icc Max:
- 11.5mA
- Pushing (MHz/V):
- 0.28 (Typ)
- Power (dBm):
- -3 ±3
- Phase Noise Typ (dBc/Hz):
- -
- Operating Temperature:
- -40°C ~ 85°C
- Size / Dimension:
- 0.118" L x 0.118" W (3.00mm x 3.00mm)
- Height:
- 0.043" (1.10mm)
MAX2624EUA+ FAQ
1.How can I place an order for MAX2624EUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX2624EUA+ 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 MAX2624EUA+ reliable?
The price and inventory of MAX2624EUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX2624EUA+ is usually 5 days.
3.What payment methods are accepted for MAX2624EUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX2624EUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX2624EUA+?
MAX2624EUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX2624EUA+ 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 MAX2624EUA+?
For technical support, including MAX2624EUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX2624EUA+ requirements.
6.How does Aetrix verify that MAX2624EUA+ is sourced from the original manufacturer or authorized distributors?
All MAX2624EUA+ 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 MAX2624EUA+ meets industry standards.
7.What is the process for return or replacement of MAX2624EUA+?
All MAX2624EUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX2624EUA+, 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 MAX2624EUA+ part is unused and in its original packaging.
Return procedure for MAX2624EUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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