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Analog Devices Inc./Maxim Integrated MAX14808ETK+
- Part No.:
- MAX14808ETK+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Power Management - Specialized
- Package:
- 68-WFQFN Exposed Pad
- Datasheet:
-
MAX14808ETK+.pdf
- Description:
- IC MUX DUAL HV 68TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,441
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Product details
Overview
MAX14808ETK+ from Maxim Integrated is an octal three-level/quad five-level high-voltage digital pulser IC with integrated transmit/receive (T/R) switches, designed for driving piezoelectric transducers in ultrasound imaging systems. It delivers ±105V bipolar pulses at up to 5MHz, supports 2A peak output current per channel, features embedded active return-to-zero clamping and on-chip floating power supplies, and operates across –40°C to +85°C in medical and industrial ultrasonic applications.
For engineers reviewing the MAX14808ETK+ datasheet, MAX14808ETK+ pinout, MAX14808ETK+ application, or MAX14808ETK+ equivalent, this page provides verified technical context, real-world timing and drive capability data, confirmed T/R switch performance metrics (RON = 11.5Ω, tONTRSW = 0.65µs), and validated alternative options for ultrasound pulser subsystem design.
Technical Context
The MAX14808ETK+ implements a DirectDrive® architecture that eliminates external HV coupling capacitors by integrating floating power supplies (FPS) and level shifters. Its dual-mode operation-octal three-level (2 logic inputs/channel) or quad five-level (3 logic inputs/channel)-enables flexible waveform synthesis while maintaining 18ns propagation delay and <–43dBc second-harmonic distortion at 5MHz under ±100V conditions.
Each channel includes overvoltage-protection diodes, grass-clipping diodes (2.5pF reverse capacitance), and a programmable damping circuit (500Ω on-resistance). The integrated T/R switch provides 11.5Ω on-impedance and –51dB crosstalk isolation, with sub-1µs turn-on/off timing and <50mV voltage spikes during switching transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | ±105V - Enables full-scale excitation of high-impedance piezoelectric transducers without external HV amplification stages. |
| Peak Output Current | 2A (typ) - Sustains high-energy pulse delivery into 1kΩ loads with <1% droop during B-mode bursts. |
| Propagation Delay | 18ns (typ) - Ensures precise channel synchronization critical for beamforming accuracy in phased-array ultrasound. |
| THD2 (HV mode) | –43dBc at 5MHz - Minimizes harmonic artifacts that degrade image contrast resolution in Doppler and B-mode imaging. |
| T/R Switch RON | 11.5Ω - Delivers low-loss signal path between pulser and LNA during receive phase, preserving SNR. |
| Grass-Clipping Diode CREV | 2.5pF - Reduces capacitive loading on transducer elements, improving bandwidth and echo fidelity. |
| Quiescent Power/Channel | 5.7mW (octal mode) - Enables scalable multi-channel designs with minimal thermal impact in portable systems. |
Pinout & Package
The MAX14808ETK+ is housed in a 68-pin, 10mm × 10mm TQFN package with exposed thermal pad, optimized for high-density ultrasound front-end layouts and efficient heat dissipation (θJA = 20°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VPPA / VPPB | High-side HV supply rails | Accept +105V input; feed upper half of H-bridge output stage for positive pulse generation. |
| VNNA / VNNB | Low-side HV supply rails | Accept –105V input; feed lower half of H-bridge for negative pulse generation and return-to-zero clamping. |
| OUTA–OUTH | Eight high-voltage differential outputs | Deliver bipolar pulses directly to transducer elements; each supports 2A peak current and 20MHz bandwidth. |
| DINP_/DINN_ (x8) | Channel control inputs | Two-bit per-channel logic interface; determines output state (high/low/clamp) in octal three-level mode. |
| CLK / CLK | Differential clock input | Synchronizes all channels to reduce FPGA jitter-induced phase noise in Doppler analysis. |
| LDO_EN | Floating supply enable | Activates internal LDOs to generate ±5V bias for FPS; eliminates need for external HV bias supplies. |
| MODE0 / MODE1 | Operation mode select | Configures device as octal three-level (MODE0=H, MODE1=L) or quad five-level (MODE0=L, MODE1=H) pulser. |
| THP | Thermal shutdown flag | Open-drain logic output asserting low when junction temperature exceeds +145°C. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated T/R switch | 11.5Ω on-resistance and 1MΩ off-isolation enable seamless transition between transmit pulse delivery and low-noise receive path without external analog switches. |
| DirectDrive® architecture | On-chip floating power supplies eliminate four external HV coupling capacitors per channel, reducing PCB area by >30% and eliminating capacitor aging effects. |
| Programmable current limit | Adjustable 0.5A–2A per channel via CC0/CC1 pins allows dynamic power scaling to match transducer impedance and imaging mode requirements. |
| Active return-to-zero clamp | Embedded nFET/pFET clamp with 13.5Ω output impedance discharges transducer capacitance within 21ns, enabling rapid pulse cancellation and improved frame rate. |
| Sync function for clocked mode | Differential clock input rejects common-mode noise and reduces RMS jitter to 6.25ps, essential for high-fidelity Doppler velocity measurement. |
Applications
| Ultrasound Medical Imaging | Industrial Flaw Detection |
|---|---|
Use Scenario: Phased-array beamforming in handheld and cart-based diagnostic ultrasound systems. IC Role / Device Role / Timing Role: High-voltage pulser generating synchronized ±100V, 5MHz bursts across 8 channels with <18ns inter-channel skew. Use Value: Enables real-time B-mode and color Doppler imaging with <–43dBc THD, supporting FDA-cleared clinical resolution standards. |
Use Scenario: High-resolution pulse-echo inspection of aerospace composites and weld joints. IC Role / Device Role / Timing Role: Precision HV driver delivering controlled 2A pulses into broadband transducers for time-of-flight defect localization. Use Value: 20MHz bandwidth and 2.5pF grass-clipping diode capacitance preserve ultrasonic pulse integrity, improving flaw detection sensitivity to <100µm defects. |
| Piezoelectric Driver Module | Ultrasound Test Equipment |
Use Scenario: Compact, multi-channel pulser board for research-grade acoustic holography and material characterization. IC Role / Device Role / Timing Role: Octal three-level pulser with programmable current (0.5–2A) and dual-mode operation for arbitrary waveform synthesis. Use Value: Integrated FPS and level shifters reduce bill-of-materials count by 12 passive components per channel versus discrete HV solutions. |
Use Scenario: Automated calibration platform verifying transducer response and beam pattern consistency. IC Role / Device Role / Timing Role: Reference pulser providing traceable ±105V, 2A pulses with <6.25ps RMS jitter for metrology-grade timing validation. Use Value: Differential clock sync and <–51dB crosstalk ensure channel-to-channel independence during multi-element transducer characterization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage digital pulser applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX14809ETK+ | No integrated T/R switch; identical pulser core, timing, and HV specs. | Requires external T/R switch (e.g., MAX485) for receive-path isolation in ultrasound systems. | Select when T/R functionality is implemented externally or unnecessary; saves cost where pulser-only operation suffices. |
| TI AFE5809 | Analog-front-end with integrated LNA, VGA, ADC; no HV pulser - requires external HV driver stage. | Targets full signal chain integration but lacks on-chip HV generation; needs companion pulser like MAX14808ETK+. | Select when system-level integration of receive path is prioritized; MAX14808ETK+ remains required for transmit. |
Compared with MAX14809ETK+, the MAX14808ETK+ adds monolithic T/R switching with 11.5Ω RON and sub-µs timing, eliminating layout complexity and signal path degradation from external switches; versus AFE5809, it provides complete HV transmit capability absent in that AFE-only solution.
Availability
MAX14808ETK+ is available at Aetrix Electronics and suitable for ultrasound medical imaging, industrial non-destructive testing, and piezoelectric actuator control requiring stable component supply, long-term lifecycle support, and traceable sourcing for Class II medical device manufacturing.
Supply support for MAX14808ETK+ 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 precision analog, mixed-signal, and high-reliability ICs for demanding industrial, medical, and communications applications.
The MAX14808ETK+ belongs to Maxim's ultrasound pulser product line, engineered specifically for high-channel-count, low-power, high-fidelity medical and industrial imaging systems requiring integrated HV drive and T/R switching.
FAQ
What is the maximum high-voltage output capability of the MAX14808ETK+?
The MAX14808ETK+ supports a high-voltage output range of ±105V referenced to GND, with VPPA/VPPB up to +105V and VNNA/VNNB down to –105V. This enables direct drive of piezoelectric transducers without external HV amplifiers, and is validated across the full –40°C to +85°C operating range per the datasheet absolute maximum ratings.
Does the MAX14808ETK+ include integrated transmit/receive (T/R) switching?
Yes, the MAX14808ETK+ integrates eight independent T/R switches with 11.5Ω typical on-resistance and 1MΩ off-isolation. Turn-on time is 0.65µs and turn-off time is 0.02µs, and it exhibits <50mV switching voltage spikes - all confirmed in the MAX14808/MAX14809 datasheet Figures 3 and toc07–toc08.
How does the MAX14808ETK+ achieve low harmonic distortion in ultrasound applications?
The MAX14808ETK+ achieves –43dBc second-harmonic distortion at 5MHz under ±100V conditions due to matched high-side/low-side output impedance (9–27Ω), low-parasitic grass-clipping diodes (2.5pF), and precise timing alignment (18ns propagation delay). These characteristics minimize waveform asymmetry and intermodulation artifacts critical for Doppler and B-mode image quality.
Can the MAX14808ETK+ operate in both octal three-level and quad five-level modes?
Yes, the MAX14808ETK+ supports two configurable modes via MODE0/MODE1 pins: octal three-level (8 channels, 2-bit control, 1A clamp current) and quad five-level (4 channels, 3-bit control, 2A clamp current). Both modes retain identical HV specs, timing, and T/R switch functionality - verified in the functional description and AC electrical characteristics tables.
What thermal protection features are built into the MAX14808ETK+?
The MAX14808ETK+ includes thermal shutdown with a trip threshold of +145°C and 20°C hysteresis, signaled via the open-drain THP pin. Junction-to-case thermal resistance is 0.5°C/W and junction-to-ambient is 20°C/W (measured on 4-layer board), enabling reliable operation in compact ultrasound modules with appropriate heatsinking of the exposed pad.
MAX14808ETK+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 68-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Applications:
- Ultrasound Imaging
- Current - Supply:
- -
- Voltage - Supply:
- 3V, 5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 68-TQFN (10x10)
MAX14808ETK+ FAQ
1.How can I place an order for MAX14808ETK+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14808ETK+ 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 MAX14808ETK+ reliable?
The price and inventory of MAX14808ETK+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14808ETK+ is usually 5 days.
3.What payment methods are accepted for MAX14808ETK+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14808ETK+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14808ETK+?
MAX14808ETK+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14808ETK+ 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 MAX14808ETK+?
For technical support, including MAX14808ETK+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14808ETK+ requirements.
6.How does Aetrix verify that MAX14808ETK+ is sourced from the original manufacturer or authorized distributors?
All MAX14808ETK+ 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 MAX14808ETK+ meets industry standards.
7.What is the process for return or replacement of MAX14808ETK+?
All MAX14808ETK+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX14808ETK+, 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 MAX14808ETK+ part is unused and in its original packaging.
Return procedure for MAX14808ETK+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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