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Analog Devices Inc./Maxim Integrated MAX2601ESA+
- Part No.:
- MAX2601ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Bipolar RF Transistors
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MAX2601ESA+.pdf
- Description:
- RF TRANS NPN 15V 1GHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,472
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Product details
Overview
MAX2601ESA+ from Maxim Integrated is a silicon bipolar RF power transistor optimized for 900MHz final-stage amplification in portable wireless transmitters. It delivers 1W RF output at 3.6V, achieves 58% collector efficiency, and operates across DC-to-microwave frequencies with 11.6dB power gain and -42dBc harmonics suppression. It serves as the output stage in AMPS, NADC (IS-54), and narrow-band PCS handsets.
For engineers reviewing the MAX2601ESA+ datasheet, MAX2601ESA+ pinout, MAX2601ESA+ application, or MAX2601ESA+ equivalent, key selection criteria include its 8-pin SOIC thermal package, bias-free operation without negative supply or drain switch, and verified performance at 836MHz under IS-54 π/4-DQPSK modulation with -28dBc ACPR.
Technical Context
The MAX2601ESA+ is a common-emitter configured silicon bipolar transistor designed for high-efficiency RF power amplification in battery-powered 900MHz systems. Its dual-collector (Pins 1 & 8) and quad-emitter (Pins 2, 3, 6, 7 + backside slug) layout minimizes series inductance and improves thermal dissipation.
It operates without external bias sequencing or negative voltage rails-unlike GaAsFET alternatives-and supports direct 3.6V Li-Ion or 4.8V NiMH/NiCd supply operation. The device sustains 17V VCE, handles 1200mA average collector current, and maintains stable performance across -40°C to +85°C with junction temperature up to +150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Power | 1W (30dBm) at 836MHz, enabling Class 5 GSM microcellular transmit stages |
| Collector Efficiency | 58% at 3.6V, extending battery life in portable transmitters without drain-switch losses |
| Power Gain | 11.6dB at 836MHz, reducing driver-stage complexity in discrete PA designs |
| Harmonics Suppression | -42dBc at 2fo/3fo, meeting spectral mask requirements for ISM and PCS bands |
| ACPR (IS-54) | -28dBc at 29dBm output with 4.8V supply, satisfying NADC linearity specs |
| VCE Rating | 17V absolute max, supporting transient overvoltage tolerance in handheld RF front-ends |
| Frequency Range | DC to microwave (tested to 836MHz and 433MHz), covering AMPS, ISM, and CDPD bands |
Pinout & Package
The MAX2601ESA+ is housed in an 8-pin SOIC package (S8E-12) with thermally enhanced backside slug soldered directly to PCB ground plane. Pin assignments are validated per Maxim's official pin configuration diagram and test circuit documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | Collector | Dual-collector connection reduces series inductance and improves RF power handling |
| 2, 3, 6, 7, Slug | Emitter | Quad-emitter pins plus backside thermal slug minimize emitter inductance and maximize heat transfer to ground |
| 4, 5 | Base | Dual-base connection lowers base-series inductance for stable high-frequency bias control |
Key Features
| Feature | Design Value |
|---|---|
| No drain switch required | Eliminates wasted power and PCB area; enables operation down to end-of-life battery voltage (~3.0V) |
| Silicon bipolar architecture | Removes need for voltage inverters or sequencing circuitry required by GaAsFET PAs |
| Thermally enhanced SOIC | Backside slug soldered to ground plane ensures <15°C/W thermal resistance and stable gain over temperature |
| DC-to-microwave operation | Validated performance at both 433MHz (ISM) and 836MHz (AMPS/NADC), simplifying multi-band design reuse |
| High linearity at low voltage | -28dBc ACPR at 29dBm output on 4.8V supply meets IS-54 spectral purity requirements |
Applications
| AMPS Cellular Phones | Narrow-Band PCS (NPCS) |
|---|---|
Use Scenario: Analog cellular handsets operating in 824–849MHz uplink band with single-cell Li-Ion supply. IC Role / Device Role / Timing Role: Final-stage RF power amplifier delivering 1W output into 50Ω load. Use Value: 58% efficiency at 3.6V extends talk time versus GaAsFET alternatives requiring higher supply or drain switching. |
Use Scenario: Low-power PCS base stations and repeaters operating at 900MHz with strict spectral mask compliance. IC Role / Device Role / Timing Role: Linear RF PA stage supporting π/4-DQPSK modulation with -28dBc ACPR. Use Value: Verified -42dBc harmonic suppression eliminates need for external harmonic filters in compact modules. |
| 915MHz ISM Transmitters | CDPD Modems |
Use Scenario: Industrial telemetry and remote sensor transmitters in unlicensed 904–928MHz ISM band. IC Role / Device Role / Timing Role: High-efficiency output amplifier driving antenna matching network at 915MHz. Use Value: 11.6dB power gain reduces driver-stage gain requirements, lowering overall system noise figure. |
Use Scenario: Mobile data modems for fleet management and utility metering using CDPD protocol at 900MHz. IC Role / Device Role / Timing Role: Battery-efficient RF PA supporting burst-mode transmission with fast turn-on. Use Value: No negative bias or sequencing needed enables immediate RF enable/disable with minimal control logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RF power amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX2602ESA+ | Incorporates integrated biasing diode matched to transistor thermal characteristics; requires external RF choke for bias network | Preferred where temperature-stable quiescent current is critical (e.g., wide ambient range outdoor radios) | Select MAX2602ESA+ when precise thermal tracking of IC is required; MAX2601ESA+ suits fixed-bias or digitally controlled bias schemes |
| MRF6P21190HR3 | GaAs pHEMT device; higher gain (14dB) but requires -2.5V gate bias and drain switch; 190W P1dB vs. 1W linear output | Targeted at infrastructure base stations-not portable battery-powered devices | Choose MRF6P21190HR3 only for high-power fixed-location applications; MAX2601ESA+ is optimized for 3.6V portable efficiency |
Compared with MAX2602ESA+, the MAX2601ESA+ offers simpler biasing but less thermal stability; compared with MRF6P21190HR3, it trades raw power for ultra-low-voltage operation, eliminating gate/drain control circuitry and reducing BOM count in handheld designs.
Availability
MAX2601ESA+ is available at Aetrix Electronics and suitable for AMPS cellular phones, narrow-band PCS transmitters, and 915MHz ISM equipment requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX2601ESA+ 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) designs precision analog, mixed-signal, and RF ICs for power, sensing, connectivity, and security applications.
The MAX2601ESA+ belongs to Maxim's RF power transistor product line, engineered specifically for high-efficiency, low-voltage portable wireless transmitters operating in 433MHz and 800–900MHz bands.
FAQ
What is the maximum operating frequency of the MAX2601ESA+?
MAX2601ESA+ is characterized for operation up to microwave frequencies, with verified performance at 836MHz (NADC/AMPS) and 433MHz (ISM). Its DC-to-microwave capability supports broadband matching networks, though optimal power gain and efficiency occur near 900MHz. The device's S-parameters and load-pull data confirm stable operation without oscillation under 50Ω terminations up to 1GHz.
Does the MAX2601ESA+ require a negative bias voltage?
No, the MAX2601ESA+ does not require negative bias. It operates with a single positive supply (3.0V to 4.8V) and uses forward-biased base-emitter junction control. Unlike GaAsFET PAs, no VGS negative rail or gate sequencing is needed-simplifying power management in battery-powered designs. The MAX2601ESA+ achieves stable Class AB operation with VBB = 0.75V applied to the base pins.
How is thermal management implemented for the MAX2601ESA+?
The MAX2601ESA+ relies on its exposed backside thermal slug, which must be soldered directly to a large PCB ground plane for effective heat dissipation. Maxim specifies 6.4W continuous power dissipation at +70°C with 80mW/°C derating above that temperature. Proper slug layout-including multiple thermal vias if the ground plane is internal-ensures junction temperature remains below +150°C under full 1W RF load.
Can the MAX2601ESA+ be used in IS-54 (NADC) systems?
Yes, the MAX2601ESA+ is explicitly validated for IS-54 π/4-DQPSK modulation: it delivers 29dBm output with -28dBc ACPR from a 4.8V supply, meeting TIA/EIA-102 standard linearity requirements. Its 58% collector efficiency at 3.6V also supports fallback operation during battery discharge, maintaining spectral compliance across the full voltage range.
What is the difference between MAX2601ESA+ and MAX2602ESA+?
The MAX2601ESA+ is a standalone RF power transistor, while the MAX2602ESA+ integrates a thermally matched biasing diode for current mirror biasing. This allows the MAX2602ESA+ to maintain stable quiescent collector current across temperature, whereas the MAX2601ESA+ requires external bias network tuning. Both share identical pinout, package, and RF performance specifications.
MAX2601ESA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Transistor Type:
- NPN
- Voltage - Collector Emitter Breakdown (Max):
- 15V
- Frequency - Transition:
- 1GHz
- Noise Figure (dB Typ @ f):
- 3.3dB @ 836MHz
- Gain:
- 11.6dB
- Power - Max:
- 6.4W
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 250mA, 3V
- Current - Collector (Ic) (Max):
- 1.2A
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
MAX2601ESA+ FAQ
1.How can I place an order for MAX2601ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX2601ESA+ 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 MAX2601ESA+ reliable?
The price and inventory of MAX2601ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX2601ESA+ is usually 5 days.
3.What payment methods are accepted for MAX2601ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX2601ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX2601ESA+?
MAX2601ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX2601ESA+ 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 MAX2601ESA+?
For technical support, including MAX2601ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX2601ESA+ requirements.
6.How does Aetrix verify that MAX2601ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX2601ESA+ 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 MAX2601ESA+ meets industry standards.
7.What is the process for return or replacement of MAX2601ESA+?
All MAX2601ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX2601ESA+, 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 MAX2601ESA+ part is unused and in its original packaging.
Return procedure for MAX2601ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX2601ESA+ Tags
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