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Analog Devices Inc./Maxim Integrated MAX3514EEP
- Part No.:
- MAX3514EEP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 20-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX3514EEP.pdf
- Description:
- IC AMP UPSTREAM CATV 20-QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,308
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Product details
Overview
MAX3514EEP from Maxim Integrated is a programmable-gain amplifier (PGA) designed for CATV upstream transmission, delivering +61dBmV output into 75Ω at QPSK modulation with 5–65MHz bandwidth. It features 0.5dB gain steps over >56dB range via SPI™ 3-wire interface, differential input/output ports requiring external balun, and operates from single +5V supply drawing 120mA in transmit mode.
For engineers reviewing the MAX3514EEP datasheet, MAX3514EEP pinout, MAX3514EEP application, or MAX3514EEP equivalent, this device serves as a pin-for-pin upgrade to MAX3510 in DOCSIS/EuroDOCSIS cable modems and OpenCable set-top boxes-where precise upstream signal level control, low burst transients, and harmonic distortion <−55dBc at 65MHz are critical design requirements.
Technical Context
The MAX3514EEP implements a programmable Gilbert-cell attenuator architecture for its PGA stage, enabling accurate 7-bit digital gain control (D6–D0) with ±0.5dB step linearity across frequency. Its dual-stage design separates input gain programming from output driver biasing, with independent VCC pins (pins 2 and 19) supporting optimized noise/power trade-offs.
Differential operation is mandatory for specified performance: input impedance is 1–1.5kΩ single-ended but requires balanced drive for second-harmonic suppression; output presents 300Ω differential impedance matched to 75Ω via 2:1 voltage-ratio balun. Transmit-enable (TXEN) and shutdown (SHDN) pins provide burst-mode power gating with 2µs transient duration and <1mVP-P step size.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | >56dB (−27dB to +27dB), enabling full upstream channel level adjustment without external attenuation |
| Gain Step Size | 0.5dB increments-supports fine-grained DOCSIS upstream power control per channel |
| Output Power | +61dBmV (QPSK, 75Ω load)-meets DOCSIS 3.0 upstream transmit mask at 65MHz |
| Harmonic Distortion | −55dBc HD2/HD3 at 65MHz, +61dBmV out-ensures compliance with spectral mask limits |
| Supply Current | 120mA @ +61dBmV out; 8mA in transmit-disable mode-reduces thermal load during idle bursts |
| Operating Frequency | 5MHz to 65MHz-covers full DOCSIS upstream band (5–65MHz) and EuroDOCSIS extensions |
| Interface | SPI™ 3-wire (CS/SDA/SCLK), TTL-compatible-enables direct microcontroller integration without level-shifting |
Pinout & Package
MAX3514EEP is housed in a 20-pin QSOP package (5.3mm × 10.2mm, 0.65mm pitch) with exposed paddle not connected (non-thermal). Pin 1 is top-left corner, pin 20 bottom-right; GND pins (1,3,7,11,4,20) provide RF and bias ground separation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,3,7,11,4,20 | GND | Dedicated RF ground (pin 4), bias ground (pin 20), and digital ground-requires separate low-inductance PCB traces |
| 2 | VCC (PGA) | +5V supply for programmable-gain core; must be decoupled to pin 4 with 0.1µF capacitor |
| 5,6 | IN+, IN− | Differential high-Z input (1–1.5kΩ); single-ended drive requires AC-coupling one pin to ground |
| 8,9,10 | CS, SDA, SCLK | SPI™ 3-wire interface-TTL-compatible, supports daisy-chaining multiple devices on shared bus |
| 12 | SHDN | Global shutdown: reduces ICC to 10µA, disables all circuitry including serial interface |
| 14 | CEXT | RF output bypass node-connect 0.1µF capacitor to ground; N.C. on MAX3517 variant |
| 15,16 | OUT−, OUT+ | Differential 300Ω output-requires external 2:1 balun for 75Ω single-ended system interface |
| 18 | TXEN | Burst-mode enable: powers output stage only when high; 2µs enable/disable transient ensures clean channel gating |
| 19 | VCC (Output Amp) | +5V supply for output driver stage-decoupled separately to pin 20 for optimal PSRR |
Key Features
| Feature | Design Value |
|---|---|
| 0.5dB Gain Resolution | Enables precise upstream power leveling per DOCSIS channel without analog trimming components |
| −55dBc Harmonic Distortion | Maintains spectral purity at 65MHz, avoiding adjacent-channel interference in dense upstream bands |
| 2µs Transmit Enable/Disable | Meets DOCSIS TDMA burst timing constraints while minimizing inter-burst noise coupling |
| Independent PGA & Output Bias Supplies | Allows optimization of input-stage noise vs. output-stage linearity via separate VCC paths (pins 2 & 19) |
| Transmit-Disable Mode Isolation | 60dB isolation between input and output during idle-prevents upstream signal leakage into receiver path |
| Thermal Stability | Gain drift ≤±0.2dB over −40°C to +85°C-eliminates need for temperature-compensated calibration |
Applications
| DOCSIS Cable Modem Upstream Path | EuroDOCSIS Set-Top Box Transmitter |
|---|---|
|
Use Scenario: Upstream data transmission in residential cable modems compliant with DOCSIS 3.0/3.1 standards. IC Role / Device Role / Timing Role: Programmable-gain amplifier conditioning upstream QPSK/QAM signals before RF upconversion and cable plant injection. Use Value: Delivers +61dBmV output with <−55dBc harmonics at 65MHz, meeting spectral mask requirements without external filtering. |
Use Scenario: Bidirectional communication in EuroDOCSIS-certified set-top boxes with upstream telemetry and interactive services. IC Role / Device Role / Timing Role: Digitally controlled gain block in the upstream RF chain, synchronized to TDMA burst timing via TXEN. Use Value: 0.5dB gain steps and 2µs burst enable ensure precise per-slot power control and minimal inter-slot interference. |
| Telephony-over-Cable (ToC) Terminal | CATV Network Status Monitor |
|
Use Scenario: Voice-grade upstream transmission in cable telephony gateways requiring low-noise, low-distortion analog path. IC Role / Device Role / Timing Role: High-linearity PGA providing stable gain across voice-band frequencies (5–50MHz) with AM/AM & AM/PM distortion <0.1dB/1°. Use Value: Maintains voice clarity by limiting composite distortion to <−55dBc even at maximum output power. |
Use Scenario: Remote monitoring of upstream channel health in HFC network nodes using narrowband probe signals. IC Role / Device Role / Timing Role: Calibrated signal source generating known-level test tones (5–65MHz) with repeatable amplitude accuracy. Use Value: ±0.2dB gain stability over temperature enables traceable field measurements without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable-gain amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX3510EPP | Legacy predecessor; identical pinout and 2:1 balun matching, but lacks SPI interface-gain set by resistor ladder | No digital gain control; unsuitable for dynamic upstream power adjustment in DOCSIS 3.x systems | Select MAX3514EEP when firmware-controlled gain adaptation or channel-by-channel leveling is required |
| MAX3517EEP | Same gain range and performance, but uses external output resistor for flexible 75Ω matching-no CEXT pin | Better load tolerance across cable plant variations; requires redesign of output matching network | Choose MAX3514EEP for drop-in replacement of MAX3510; choose MAX3517EEP when board-level matching optimization is prioritized |
Compared with MAX3510EPP, MAX3514EEP adds digital gain control without layout change; versus MAX3517EEP, it retains integrated CEXT bypass for simpler 2:1 balun implementation-making it optimal for cost-sensitive DOCSIS modem designs needing proven reference layouts.
Availability
MAX3514EEP is available at Aetrix Electronics and suitable for DOCSIS cable modems, EuroDOCSIS set-top boxes, and Telephony-over-Cable terminals requiring stable component supply across extended industrial temperature range (−40°C to +85°C).
Supply support for MAX3514EEP 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 and mixed-signal ICs for communications, computing, and industrial applications.
The MAX3514EEP belongs to Maxim's upstream CATV amplifier family, engineered specifically for DOCSIS/EuroDOCSIS upstream signal conditioning with emphasis on spectral purity, burst-mode efficiency, and digital gain programmability.
FAQ
What is the maximum output power of the MAX3514EEP and under what conditions?
The MAX3514EEP delivers +61dBmV output into a 75Ω load using QPSK modulation, measured at 5–65MHz with +34dBmV nominal input and +5V supply. This performance is guaranteed across −40°C to +85°C and meets DOCSIS upstream power mask requirements. The device achieves this with 120mA supply current in transmit-enable mode and maintains <−55dBc harmonic distortion at 65MHz.
Does the MAX3514EEP require an external balun, and why?
Yes, the MAX3514EEP requires an external 2:1 voltage-ratio balun at its differential output (pins 15/16) to interface with standard 75Ω single-ended CATV infrastructure. Its internal output stage presents 300Ω differential impedance; the balun provides both impedance transformation and common-mode rejection. The datasheet specifies internal matching for use with this exact balun ratio-omitting it causes severe return loss degradation and harmonic emission increase.
How does the MAX3514EEP manage power during TDMA burst intervals?
The MAX3514EEP uses two dedicated control lines: TXEN enables/disables the output amplifier stage with 2µs transient response, and SHDN globally powers down all circuitry to 10µA. In typical DOCSIS TDMA operation, TXEN toggles per slot while SHDN remains high-reducing active current from 120mA to 8mA in transmit-disable mode without disrupting SPI configuration or bias states.
What is the gain resolution and total range supported by the MAX3514EEP?
The MAX3514EEP provides 0.5dB gain steps across a total range exceeding 56dB-from −27dB to +27dB-controlled by a 7-bit SPI word (D6–D0). This resolution enables precise upstream power leveling per DOCSIS channel, and the range accommodates varying cable plant losses without external attenuation. Gain accuracy is maintained within ±0.5dB over temperature and supply voltage variation.
Is the MAX3514EEP pin-compatible with any legacy devices?
Yes, the MAX3514EEP is explicitly described as a pin-for-pin compatible upgrade for the MAX3510. Both share identical 20-pin QSOP packaging, pin functions, and internal 2:1 balun matching network-allowing direct replacement in existing designs. The key enhancement is the addition of SPI-based digital gain control, eliminating the need for external resistor ladders used in the MAX3510 for gain setting.
MAX3514EEP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- -
- Current - Input Bias:
- -
- Voltage - Input Offset:
- -
- Current - Supply:
- -
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- -
- Voltage - Supply Span (Max):
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QSOP
MAX3514EEP FAQ
1.How can I place an order for MAX3514EEP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX3514EEP 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 MAX3514EEP reliable?
The price and inventory of MAX3514EEP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX3514EEP is usually 5 days.
3.What payment methods are accepted for MAX3514EEP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX3514EEP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX3514EEP?
MAX3514EEP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX3514EEP 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 MAX3514EEP?
For technical support, including MAX3514EEP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX3514EEP requirements.
6.How does Aetrix verify that MAX3514EEP is sourced from the original manufacturer or authorized distributors?
All MAX3514EEP 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 MAX3514EEP meets industry standards.
7.What is the process for return or replacement of MAX3514EEP?
All MAX3514EEP units undergo pre-shipment inspection (PSI). If there is an issue with MAX3514EEP, 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 MAX3514EEP part is unused and in its original packaging.
Return procedure for MAX3514EEP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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