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Analog Devices Inc./Maxim Integrated MAX2624EUA-T
- Part No.:
- MAX2624EUA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- VCOs (Voltage Controlled Oscillators)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Description:
- IC VCO OSCILLATOR UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,229
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Product details
Overview
The MAX2624EUA-T from Maxim Integrated is a monolithic voltage-controlled oscillator (VCO) designed for RF local oscillator applications in the 947MHz to 998MHz ISM band. It integrates an LC oscillator core and a 50Ω-matched output buffer in an 8-pin µMAX package, operates from +2.7V to +5.5V, draws 8mA supply current, and delivers −3dBm output power with −101dBc/Hz phase noise at 100kHz offset.
For engineers reviewing the MAX2624EUA-T datasheet, MAX2624EUA-T pinout, MAX2624EUA-T application, or MAX2624EUA-T equivalent, key selection considerations include guaranteed frequency range (947–998MHz), tuning gain (75–100kHz/V), shutdown current (0.1µA), on-chip 50Ω match, and dual VCC/GND separation for output buffer isolation.
Technical Context
The MAX2624EUA-T implements a fully monolithic LC oscillator topology with on-die inductor and varactor elements, eliminating external tank components. Its differential oscillator core provides stable frequency versus supply voltage and improved load-variation immunity.
An integrated common-emitter output buffer features on-chip reactive matching to 50Ω, requires no external DC blocking capacitor, and uses dedicated VCC and GND pins to minimize load-pulling effects-enabling direct drive of RF mixers or synthesizers without additional amplification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Oscillator Frequency Range | 947MHz to 998MHz - factory preset, guaranteed over −40°C to +85°C without external calibration |
| Supply Voltage | +2.7V to +5.5V - single-supply operation compatible with 3.3V and 5V systems |
| Supply Current | 8mA typical - enables low-power portable and battery-operated RF designs |
| Output Power | −3dBm - sufficient to directly drive most RF mixers without external amplification |
| Phase Noise | −101dBc/Hz at 100kHz offset - meets spectral purity requirements for ISM-band transceivers |
| Shutdown Current | 0.1µA - supports ultra-low-power sleep modes in duty-cycled wireless systems |
| Tuning Gain | 75–100kHz/V - defines VCO sensitivity to PLL loop filter voltage; impacts loop bandwidth and stability |
Pinout & Package
Package: 8-pin µMAX (3mm × 3mm, 0.8mm height, exposed pad), RoHS-compliant, thermal-enhanced plastic package with gull-wing leads.
| 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 (0.4V–2.4V range); connects directly to PLL loop filter output |
| 3 - GND (Osc) | Oscillator Core Ground | Low-inductance return path for oscillator core; separate from buffer ground to prevent coupling |
| 4 - SHDN | Shutdown Control Input | Logic-level input: ≤0.6V disables oscillator, ≥2.0V enables; draws <0.5µA |
| 5 - VCC (Buf) | Output Buffer Supply | Dedicated 2.7–5.5V supply for buffer stage; bypass with 220pF to adjacent GND8 |
| 6 - VCC (Osc) | Oscillator Core Supply | Dedicated 2.7–5.5V supply for oscillator core; bypass with 220pF to adjacent GND3 |
| 7 - OUT | Buffered RF Output | 50Ω-matched, DC-coupled RF output; drives mixer/synthesizer inputs directly |
| 8 - GND (Buf) | Output Buffer Ground | Low-inductance return for buffer stage; isolated from GND3 to suppress load pulling |
Key Features
| Feature | Design Value |
|---|---|
| Fully monolithic LC tank | On-die inductor and varactor eliminate external resonator components and layout sensitivity |
| Dual independent VCC/GND pairs | Separates oscillator core and output buffer supplies/grounds to reduce load-pulling and supply pushing |
| On-chip 50Ω output match | Enables direct 50Ω transmission line connection without external matching network or DC-blocking capacitor |
| Factory-trimmed frequency range | Guarantees 947–998MHz operation across temperature and voltage without user calibration |
| Low-noise shutdown mode | Reduces supply current to 0.1µA while preserving tuning voltage state for fast wake-up |
Applications
| ISM Band Transceiver LO | Wireless Sensor Node Synthesizer |
|---|---|
Use Scenario: 902–928MHz ISM-band transceiver using 45–70MHz IF architecture. IC Role / Device Role / Timing Role: Local oscillator generating precise RF carrier for upconversion and downconversion stages. Use Value: Delivers −3dBm output and −101dBc/Hz phase noise at 100kHz offset, meeting FCC spectral mask requirements for Class B devices. | Use Scenario: Ultra-low-power industrial sensor node with periodic RF wake-up and short transmit bursts. IC Role / Device Role / Timing Role: Frequency source enabling rapid PLL lock and low-duty-cycle RF operation. Use Value: 0.1µA shutdown current and 8mA active current support multi-year battery life; factory-trimmed range eliminates calibration overhead. |
| RF Remote Control Transmitter | Smart Meter RF Front-End |
Use Scenario: Sub-GHz remote control system operating in 947–998MHz band with simple OOK modulation. IC Role / Device Role / Timing Role: Carrier generator synchronized to digital baseband modulator via TUNE pin voltage stepping. Use Value: 75–100kHz/V tuning gain allows fine-grained frequency agility for channel hopping or interference avoidance. | Use Scenario: ANSI C12.22-compliant smart electricity meter requiring robust, temperature-stable RF link. IC Role / Device Role / Timing Role: Primary LO for narrowband FSK receiver and transmitter chain. Use Value: Guaranteed 947–998MHz operation over −40°C to +85°C ensures consistent channel alignment across outdoor deployment environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar VCO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX2623EUA-T | Frequency range 885–950MHz; 280kHz/V tuning gain; same pinout and supply specs | Targeted for DECT and 902–928MHz ISM with ±10.7MHz IF - not suitable for 947–998MHz band | Select only if operating in lower-frequency ISM bands; verify PLL loop filter redesign for higher tuning gain |
| LMX2531LQ1770E/NOPB | Integrated PLL+VCO; 1770MHz max output; requires external loop filter; 3.3V-only supply | Designed for programmable frequency synthesis with fractional-N capability - adds complexity but improves channel resolution | Choose when flexible channel spacing or frequency agility beyond VCO-only tuning is required; not drop-in compatible |
Compared with MAX2623EUA-T and LMX2531LQ1770E/NOPB, the MAX2624EUA-T offers optimized fixed-range performance at 947–998MHz with minimal external components, lower power than PLL-based alternatives, and guaranteed temperature stability-making it ideal for cost-sensitive, high-volume ISM-band transceivers where frequency agility is limited to analog tuning.
Availability
MAX2624EUA-T is available at Aetrix Electronics and suitable for ISM-band transceivers, wireless sensor nodes, RF remote controls, and smart meter RF front-ends requiring stable component supply and guaranteed frequency performance across industrial temperature ranges.
Supply support for MAX2624EUA-T 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 solutions for industrial, communications, and consumer applications.
The MAX262x family was designed specifically as monolithic, module-equivalent VCOs for simplified RF local oscillator design in sub-1GHz ISM-band systems-replacing discrete or hybrid VCO modules with reduced size, cost, and design risk.
FAQ
What is the guaranteed frequency range of the MAX2624EUA-T over temperature?
The MAX2624EUA-T is factory trimmed to guarantee operation from 947MHz to 998MHz across the full industrial temperature range of −40°C to +85°C. This specification is verified by design and characterization-not just tested at +25°C-and applies under standard operating conditions (VCC = +2.7V to +5.5V, VTUNE = 0.4V to 2.4V). No external calibration or trimming is required to meet this range.
Does the MAX2624EUA-T require an external DC-blocking capacitor on the OUT pin?
No, the MAX2624EUA-T does not require an external DC-blocking capacitor on the OUT pin. Its integrated output buffer includes on-chip reactive matching to 50Ω and is DC-coupled. The output is designed to connect directly to 50Ω transmission lines or RF mixer inputs without additional passive components-reducing bill-of-materials and layout complexity.
How does the dual VCC/GND architecture improve performance in the MAX2624EUA-T?
The MAX2624EUA-T uses separate VCC and GND pins for the oscillator core (pins 6 and 3) and output buffer (pins 5 and 8) to isolate sensitive oscillator biasing from load-induced disturbances. This architecture reduces supply pushing (0.75MHzp-p) and load pulling (−27dBc), ensuring stable frequency output even when driving mismatched or dynamically varying loads-critical for reliable mixer interface in real-world RF systems.
What is the tuning voltage range and input impedance of the TUNE pin on the MAX2624EUA-T?
The TUNE pin of the MAX2624EUA-T accepts a DC voltage from 0.4V (low end of frequency range) to 2.4V (high end), with a high input impedance (>1MΩ). It is intended to be driven by a low-impedance PLL loop filter output. Excess noise on this pin directly translates to FM noise, so a low-pass RC filter is recommended in production layouts to preserve phase-noise performance.
Can the MAX2624EUA-T be used in place of the MAX2622EUA-T or MAX2623EUA-T?
No-the MAX2624EUA-T is not interchangeable with the MAX2622EUA-T (855–881MHz) or MAX2623EUA-T (885–950MHz) due to non-overlapping, factory-trimmed frequency ranges. While pin-compatible and sharing identical supply, shutdown, and output characteristics, substituting across variants will result in failure to meet target RF band requirements. Each variant must be selected based on its specified frequency band.
MAX2624EUA-T 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:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-T FAQ
1.How can I place an order for MAX2624EUA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX2624EUA-T 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-T reliable?
The price and inventory of MAX2624EUA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX2624EUA-T is usually 5 days.
3.What payment methods are accepted for MAX2624EUA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX2624EUA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX2624EUA-T?
MAX2624EUA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX2624EUA-T 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-T?
For technical support, including MAX2624EUA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX2624EUA-T requirements.
6.How does Aetrix verify that MAX2624EUA-T is sourced from the original manufacturer or authorized distributors?
All MAX2624EUA-T 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-T meets industry standards.
7.What is the process for return or replacement of MAX2624EUA-T?
All MAX2624EUA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX2624EUA-T, 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-T part is unused and in its original packaging.
Return procedure for MAX2624EUA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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