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Analog Devices Inc./Maxim Integrated MAX2205EBS+T
- Part No.:
- MAX2205EBS+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- RF Detectors
- Package:
- 4-WFBGA, CSPBGA
- Datasheet:
-
MAX2205EBS+T.pdf
- Description:
- IC RF DETECT 800MHZ-2GHZ 4UCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,427
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Product details
Overview
MAX2205EBS+T from Maxim Integrated is a CDMA-optimized RF power detector IC with high-impedance input (680Ω || 27pF), 25dB dynamic range, and ±0.3dB temperature-compensated detection accuracy across 800MHz–2GHz. It interfaces directly with CDMA PA output via low-loss resistive tap and delivers monotonic analog voltage output for closed-loop transmit power control in handset front-end modules.
For engineers reviewing the MAX2205EBS+T datasheet, MAX2205EBS+T pinout, MAX2205EBS+T application, or MAX2205EBS+T equivalent, this device is selected for CDMA2000/WCDMA handset PA monitoring where high-input-impedance coupling, minimal external components, and tight temperature stability over –40°C to +85°C are required.
Technical Context
The MAX2205EBS+T implements a temperature-compensated peak-detection architecture optimized for CDMA signal envelopes with 3.9–5.4dB peak-to-average ratio. Its high-impedance RF input eliminates need for directional coupler, enabling direct resistive tap from PA output while maintaining signal integrity up to 2GHz.
It features externally adjustable averaging time constant via CFILTER pin, supports shutdown logic via RFIN/SHDN dual-function pin, and integrates internal biasing to deliver stable output voltage (±0.3dB typical variation) without external op-amp or filter components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Frequency Range | 800MHz to 2GHz - supports full CDMA2000 and WCDMA bands without retuning. |
| Dynamic Range | 25dB - enables accurate power measurement across CDMA transmit power levels from low-power idle to full-output burst. |
| Detection Accuracy | ±0.3dB (typ) over –40°C to +85°C - ensures consistent closed-loop PA control without calibration drift. |
| Input Impedance | 680Ω || 27pF - provides low-loss, high-Z resistive tap from PA output, minimizing insertion loss and matching network complexity. |
| Supply Current | 2mA to 3.5mA (idle) - enables low-power operation in battery-constrained mobile handsets. |
| Shutdown Current | 0.5µA to 10µA - allows deep power-down during receive mode or sleep states. |
| Response Time | 15µs (high-power) - meets CDMA reverse-channel timing requirements for fast AGC loop response. |
Pinout & Package
MAX2205EBS+T is housed in a 2 × 2 mm, 0.5mm-pitch UCSP™ (Ultra-Compact Silicon Package) with four solder bumps. The package occupies only 1mm² PCB area and requires no external passive filtering or amplification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | RFIN/SHDN | Dual-function pin: accepts high-Z RF input from CDMA PA output and serves as logic-controlled shutdown input (VH = 2.0V, VL = 0.6V). |
| A2 | VCC | Power supply input (2.7V–5.0V); requires local bypass capacitor to GND for RF stability and noise rejection. |
| B1 | GND | Ground reference; multiple low-inductance vias to PCB ground plane essential for RF performance and thermal dissipation. |
| B2 | OUT | Analog voltage output proportional to input RF power; drives ADC input directly with no buffer needed. |
Key Features
| Feature | Design Value |
|---|---|
| High-impedance RF input | 680Ω || 27pF enables direct resistive tap from CDMA PA output-eliminates directional coupler and associated loss/matching complexity. |
| Integrated temperature compensation | Reduces worst-case detection error to ±0.3dB (typ), ensuring stable transmit power control across industrial temperature range. |
| No external op-amp or filter required | Full signal conditioning integrated on-die-reduces BOM count, PCB area, and design validation effort for handset front-end modules. |
| Externally adjustable averaging time | CFILTER pin allows RC-based time constant tuning (e.g., 1.5nF → 390µs) to match CDMA signal envelope characteristics and ripple requirements. |
| UCSP package footprint | 2 × 2 mm, 1mm² area-fits within tight space constraints of modern multi-band handset PA modules and RF front-end ICs. |
Applications
| CDMA Handset Transmit Power Control | WCDMA Front-End Module Monitoring |
|---|---|
|
Use Scenario: Real-time closed-loop control of CDMA2000 PA output power during voice transmission with 5.4dB peak-to-average ratio. IC Role / Device Role / Timing Role: RF power detector providing analog voltage feedback to baseband processor's DAC/ADC for AGC loop execution. Use Value: Enables ±0.3dB detection accuracy across –40°C to +85°C, eliminating need for factory calibration and reducing test time. |
Use Scenario: Monitoring PA output in dual-band WCDMA handsets operating at 836MHz and 1880MHz bands. IC Role / Device Role / Timing Role: High-Z RF detector interfacing directly with PA output stage to avoid coupler insertion loss and maintain EVM integrity. Use Value: 25dB dynamic range covers full WCDMA transmit power range (–5dBm to +20dBm), supporting both low-power search and full-power burst modes. |
| PA Module Integration | CDMA Base Station Remote Head |
|
Use Scenario: Embedding in compact PA module for LTE/CDMA multimode handsets requiring minimal external components. IC Role / Device Role / Timing Role: On-module power sensing element feeding analog voltage to system controller for adaptive biasing and thermal derating. Use Value: 2mA idle current and 0.5µA shutdown current extend battery life; UCSP package allows co-location with PA die on same substrate. |
Use Scenario: Power monitoring in outdoor CDMA remote radio head where wide temperature range and long-term stability are critical. IC Role / Device Role / Timing Role: Temperature-stable RF detector delivering repeatable output voltage under varying ambient conditions and aging effects. Use Value: ±1dB worst-case variation at full power ensures reliable PA protection and compliance with IS-95/IS-2000 spectral mask limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RF power detection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX2208EBS+T | Same 25dB dynamic range and UCSP package, but uses internal 50Ω termination instead of high-Z input; requires directional coupler interface. | Designed for CDMA systems using coupler-based sampling rather than direct PA tap; not suitable for high-Z resistive coupling. | Select MAX2208EBS+T only when directional coupler is already present in the signal path and board layout permits 50Ω source termination. |
| ADL5511ACPZ-R7 | 200MHz–6GHz bandwidth, 45dB dynamic range, 3.3V supply; requires external op-amp and filter; larger 3×3 LFCSP package. | Targets broadband instrumentation and base station applications-not optimized for CDMA handset size/power constraints. | Choose ADL5511ACPZ-R7 only when extended frequency coverage beyond 2GHz or higher dynamic range justifies added BOM cost and PCB area. |
Compared with MAX2208EBS+T and ADL5511ACPZ-R7, the MAX2205EBS+T uniquely combines CDMA-optimized high-Z input, ultra-compact UCSP footprint, and zero-external-component operation-making it the only solution that enables direct PA tap without coupler or op-amp in space-constrained handset designs.
Availability
MAX2205EBS+T is available at Aetrix Electronics and suitable for CDMA handset design, WCDMA front-end integration, and PA module manufacturing requiring stable component supply, lead-free compliance, and full lifecycle support.
Supply support for MAX2205EBS+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) designs precision analog, mixed-signal, and RF ICs for automotive, industrial, communications, and consumer applications.
The MAX2205–MAX2208 family was developed specifically for cellular handset RF front-end power monitoring, emphasizing minimal footprint, temperature stability, and compatibility with CDMA/WCDMA signal statistics and PA architectures.
FAQ
What is the RF input impedance of the MAX2205EBS+T and why does it matter for CDMA applications?
The MAX2205EBS+T has a high-impedance RF input of 680Ω || 27pF, enabling direct resistive tap from the CDMA power amplifier output without requiring a directional coupler. This reduces insertion loss, simplifies matching networks, and preserves signal integrity-critical for meeting CDMA2000 spectral mask and EVM requirements in handset designs.
Does the MAX2205EBS+T require external components to operate in a CDMA handset?
No. The MAX2205EBS+T operates with only three external components: a VCC bypass capacitor, a shutdown pull-up resistor (if used), and an optional CFILTER capacitor for ripple reduction. Its integrated temperature compensation, high-Z input, and monotonic output eliminate the need for external op-amps, filters, or calibration circuitry-reducing BOM count and layout complexity.
How does the MAX2205EBS+T achieve ±0.3dB detection accuracy over temperature?
The MAX2205EBS+T achieves ±0.3dB typical detection accuracy through on-chip temperature-compensated peak-detection circuitry that actively corrects for process and thermal drift. This compensation is factory-trimmed and verified across –40°C to +85°C, ensuring stable output voltage versus input power without software calibration or external trimming components.
Can the MAX2205EBS+T be used in WCDMA handsets operating at 1880MHz?
Yes. The MAX2205EBS+T is specified for 800MHz–2GHz operation, including full WCDMA bands (836MHz and 1880MHz). Typical operating curves confirm <±1dB variation at 1880MHz across temperature and supply voltage, making it suitable for dual-band WCDMA handset PA monitoring and closed-loop power control.
What is the role of the CFILTER pin on the MAX2205EBS+T?
The CFILTER pin on the MAX2205EBS+T connects an external capacitor to ground to set the averaging time constant for the detector output. For example, a 1.5nF capacitor yields ~390µs response time and 43mVP-P ripple for IS-95A reverse channel signals-allowing designers to tune transient response and ripple performance to match specific CDMA waveform characteristics.
MAX2205EBS+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Frequency:
- 800MHz ~ 2GHz
- RF Type:
- Cellular, CDMA
- Input Range:
- 6dBm ~ 31dBm
- Accuracy:
- ±0.3dB
- Voltage - Supply:
- 2.7V ~ 5V
- Mounting Type:
- 2 mA
- Supplier Device Package:
- Surface Mount
- Current - Supply:
- 4-UCSP (0.97x0.97)
MAX2205EBS+T FAQ
1.How can I place an order for MAX2205EBS+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX2205EBS+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 MAX2205EBS+T reliable?
The price and inventory of MAX2205EBS+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX2205EBS+T is usually 5 days.
3.What payment methods are accepted for MAX2205EBS+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX2205EBS+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX2205EBS+T?
MAX2205EBS+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX2205EBS+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 MAX2205EBS+T?
For technical support, including MAX2205EBS+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX2205EBS+T requirements.
6.How does Aetrix verify that MAX2205EBS+T is sourced from the original manufacturer or authorized distributors?
All MAX2205EBS+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 MAX2205EBS+T meets industry standards.
7.What is the process for return or replacement of MAX2205EBS+T?
All MAX2205EBS+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX2205EBS+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 MAX2205EBS+T part is unused and in its original packaging.
Return procedure for MAX2205EBS+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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