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Analog Devices Inc./Maxim Integrated MAX4801CQI
- Part No.:
- MAX4801CQI
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-LCC (J-Lead)
- Datasheet:
-
MAX4801CQI.pdf
- Description:
- IC SW SPSTX8 25OHM 28PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:5,488
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Product details
Overview
MAX4801CQI from Maxim Integrated is an 8-channel, high-voltage SPST analog switch designed for ultrasound imaging transducer multiplexing and industrial printer head control. It delivers low-charge-injection (350pC), 22Ω on-resistance, -77dB off-isolation at 5MHz, and operates across VPP/VNN supplies up to +100V/-100V with independent +2.7V to +13.2V digital logic supply. Its serial interface enables compact PCB routing in multi-channel HV switching systems.
For engineers reviewing the MAX4801CQI datasheet, MAX4801CQI pinout, MAX4801CQI application, or MAX4801CQI equivalent, this page provides verified electrical parameters, PLCC-28 package mapping, daisy-chain timing behavior, power-on reset behavior, and validated drop-in alternatives for medical imaging and precision printing designs.
Technical Context
The MAX4801CQI integrates eight independent BCDMOS SPST switches controlled via an 8-bit serial shift register with latch enable (LE) and clear (CLR) inputs. All switches open at power-up due to internal reset logic, ensuring safe startup in high-voltage transducer arrays.
It supports flexible high-voltage supply configurations: VPP/VNN = +100V/-100V, +185V/-15V, or +40V/-160V (max VPP–VNN = 200V), while digital inputs (DIN, CLK, LE, CLR) tolerate up to +13.2V regardless of VDD level. No bleed resistors are integrated-unlike MAX4802-making it suitable for applications requiring minimal terminal leakage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Channels | 8 independent SPST switches, each with COM/NO terminals for bidirectional signal routing |
| On-Resistance (RONS) | 22Ω typical at VPP=+100V/VNN=-100V, enabling low insertion loss in 50Ω–100kΩ ultrasound front-ends |
| Charge Injection | 350pC max, minimizing voltage glitches during switching in sensitive piezoelectric drive circuits |
| Off-Isolation | -77dB at 5MHz, suppressing crosstalk between adjacent transducer channels in phased-array systems |
| Supply Range (VPP/VNN) | +40V to -160V up to +185V to -15V; differential limit ≤200V ensures compatibility with diverse HV bias rails |
| Digital Interface Voltage | VDD = +2.7V to +13.2V; DIN/CLK/LE/CLR tolerate +13.2V independent of VDD, simplifying MCU-level interfacing |
| Operating Temperature | 0°C to +70°C commercial range, validated for embedded ultrasound modules and office printer controllers |
Pinout & Package
MAX4801CQI is housed in a 28-pin PLCC (Plastic Leaded Chip Carrier) package with gull-wing leads, optimized for through-hole mounting and thermal reliability in high-voltage PCB layouts. Pin 1 is marked by a notch on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| COM0–COM7 | Analog common terminals (8 pins) | Each connects to one transducer element or print head driver; must remain unconnected or within VNN ≤ V ≤ VPP during power transitions |
| NO0–NO7 | Analog normally-open terminals (8 pins) | Switch closure routes signal to shared HV bus; low capacitance (4–18pF off, 20–56pF on) preserves bandwidth |
| VPP / VNN | High-voltage positive/negative supplies | Bypassed externally with ≥0.1µF ceramic capacitors; support asymmetric rails (e.g., +185V/-15V) |
| VDD / GND | Digital supply and ground | VDD powers shift register/latch; GND is logic reference-not tied to HV ground unless system design requires it |
| DIN / CLK / LE / CLR / DOUT | Serial control interface | LE active-low loads shift register into latch; CLR high resets all switches open; DOUT enables daisy-chaining up to 16 devices |
Key Features
| Feature | Design Value |
|---|---|
| Pin-compatible replacement | Direct drop-in for Supertex HV20320PJ in 28-pin PLCC footprint-no PCB redesign required |
| Low-charge-injection switching | 350pC max ensures <1mV transient offset in 100kΩ ultrasound receive paths, preserving SNR |
| Wide HV supply flexibility | VPP/VNN combinations up to 200V differential allow reuse across +100V/-100V imaging and +40V/-160V printer platforms |
| Power-on reset safety | All switches default open at power-up, preventing unintended HV discharge into transducers or print heads |
| 13.2V-tolerant digital inputs | Eliminates level-shifting when interfacing with 5V or 12V microcontrollers or FPGAs |
Applications
| Ultrasound Transducer Multiplexing | Industrial Printer Head Control |
|---|---|
Use Scenario: Phased-array ultrasound systems require sequential activation of 64–256 piezoelectric elements using compact HV switching. IC Role / Device Role / Timing Role: MAX4801CQI acts as channel selector-each of its 8 switches routes HV pulses to individual transducer rows under serial command. Use Value: 22Ω RONS and 350pC charge injection minimize pulse distortion and baseline drift during fast-switching beamforming. |
Use Scenario: High-resolution industrial inkjet printers use HV pulses to eject droplets from multiple nozzles per printhead. IC Role / Device Role / Timing Role: MAX4801CQI serves as nozzle driver selector-enabling precise timing of ±100V pulses to individual print elements. Use Value: -77dB off-isolation at 5MHz prevents cross-talk between adjacent nozzles, ensuring consistent droplet volume and placement. |
| Capacitive Load Switching | Multi-Channel HV Signal Routing |
Use Scenario: Test equipment for semiconductor characterization applies programmable HV waveforms to DUTs with varying capacitance. IC Role / Device Role / Timing Role: MAX4801CQI routes calibrated HV signals to different test points while maintaining signal integrity. Use Value: DC-to-10MHz analog bandwidth and 22Ω on-resistance preserve waveform fidelity for rise times <100ns. |
Use Scenario: Modular medical imaging subsystems require reconfigurable HV signal paths between FPGA controllers and analog front-ends. IC Role / Device Role / Timing Role: MAX4801CQI functions as a digitally controlled HV crosspoint-serially programmed to establish dynamic signal chains. Use Value: Daisy-chain capability (via DOUT→DIN) allows synchronized control of 8+ devices with single SPI bus, reducing GPIO count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-channel high-voltage analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HV20320PJ | Original Supertex part; identical pinout, same 28-pin PLCC, but lacks internal power-on reset circuitry | Requires external reset management in systems where safe startup is critical | Select MAX4801CQI when guaranteed open-at-power-up behavior is required without added components |
| MAX4800CQI | Same family, 28-pin PLCC, but supports only VPP/VNN = +100V/-100V (not +185V/-15V or +40V/-160V) | Limited to symmetric HV rails; unsuitable for asymmetric printer or legacy imaging supplies | Choose MAX4801CQI for broader HV supply compatibility and full feature parity with HV20320PJ replacement |
Compared with HV20320PJ, MAX4801CQI adds power-on reset and 13.2V-tolerant inputs; compared with MAX4800CQI, it retains full VPP/VNN flexibility-making it the most robust choice for new ultrasound and printer designs requiring drop-in compatibility and supply adaptability.
Availability
MAX4801CQI is available at Aetrix Electronics and suitable for ultrasound imaging systems, industrial printer controllers, and HV test instrumentation requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for MAX4801CQI 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 U.S.-based semiconductor company specializing in precision analog, mixed-signal, and high-voltage interface ICs for industrial, medical, and communications markets.
The MAX4800/MAX4801/MAX4802 product line was engineered specifically for high-reliability, low-distortion multiplexing in ultrasound transducer arrays and high-speed printer head drivers-emphasizing charge injection control, HV rail flexibility, and serial configurability.
FAQ
What is the maximum VPP–VNN voltage rating for MAX4801CQI?
The absolute maximum VPP–VNN differential voltage for MAX4801CQI is 220V, but operational specification limits it to ≤200V. Valid supply combinations include +100V/-100V, +185V/-15V, and +40V/-160V. Exceeding 200V risks permanent damage, and operation above this threshold is not characterized or guaranteed. The MAX4801CQI datasheet specifies performance only within these defined ranges.
Does MAX4801CQI include integrated bleed resistors like MAX4802?
No, MAX4801CQI does not include integrated bleed resistors. Unlike MAX4802-which features 35kΩ resistors from each COM/NO terminal to RGND-the MAX4801CQI omits this function. This makes MAX4801CQI appropriate for applications where minimal terminal leakage is critical, such as low-noise ultrasound receive paths or precision HV signal routing where external discharge control is preferred.
Can MAX4801CQI be daisy-chained with other MAX480x devices?
Yes, MAX4801CQI supports daisy-chaining via its DOUT pin, which outputs shifted data delayed by eight clock cycles. Connect DOUT of one device to DIN of the next, while sharing CLK, LE, and CLR lines. This allows synchronous programming of multiple MAX4801CQI units using a single SPI interface-ideal for scaling to 64+ channel ultrasound systems without increasing controller pin count.
What is the purpose of the RGND pin, and is it present on MAX4801CQI?
The RGND pin is used exclusively by MAX4802 to reference its internal 35kΩ bleed resistors. MAX4801CQI does not incorporate bleed resistors and therefore has no RGND pin. In the 28-pin PLCC package, pin 11 is designated N.C. (No Connection) for MAX4801CQI-confirming absence of RGND functionality. This distinction is clearly documented in the Pin Descriptions table for MAX4801 PLCC.
How does the power-on reset function behave in MAX4801CQI?
The MAX4801CQI includes an internal power-on reset circuit that forces all eight switches to the open (OFF) state at power-up, regardless of shift register contents. This behavior is guaranteed across the full 0°C to +70°C operating range and eliminates risk of unintended HV connection during system initialization-critical for protecting piezoelectric transducers and printer head elements from damaging current surges.
MAX4801CQI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Switch Circuit:
- SPST - Open
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 8
- On-State Resistance (Max):
- 25Ohm
- Channel-to-Channel Matching (ΔRon):
- 1.25Ohm
- Voltage - Supply, Single (V+):
- 2.7V ~ 13.2V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 5µs, 5µs
- -3db Bandwidth:
- -
- Charge Injection:
- 820pC
- Channel Capacitance (CS(off), CD(off)):
- 11pF
- Current - Leakage (IS(off)) (Max):
- 4µA
- Crosstalk:
- -80dB @ 5MHz
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-PLCC (11.5x11.5)
MAX4801CQI FAQ
1.How can I place an order for MAX4801CQI through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4801CQI 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 MAX4801CQI reliable?
The price and inventory of MAX4801CQI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4801CQI is usually 5 days.
3.What payment methods are accepted for MAX4801CQI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4801CQI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4801CQI?
MAX4801CQI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4801CQI 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 MAX4801CQI?
For technical support, including MAX4801CQI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4801CQI requirements.
6.How does Aetrix verify that MAX4801CQI is sourced from the original manufacturer or authorized distributors?
All MAX4801CQI 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 MAX4801CQI meets industry standards.
7.What is the process for return or replacement of MAX4801CQI?
All MAX4801CQI units undergo pre-shipment inspection (PSI). If there is an issue with MAX4801CQI, 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 MAX4801CQI part is unused and in its original packaging.
Return procedure for MAX4801CQI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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