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Analog Devices Inc./Maxim Integrated MAX4800CQI
- Part No.:
- MAX4800CQI
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-LCC (J-Lead)
- Datasheet:
-
MAX4800CQI.pdf
- Description:
- IC SW SPSTX8 38OHM 28PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,478
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Product details
Overview
The MAX4800CQI from Maxim Integrated is an 8-channel, high-voltage SPST analog switch designed for ultrasound imaging and printer systems. It features low-charge-injection (350pC), 22Ω on-resistance, DC–10MHz signal bandwidth, and operates with VPP/VNN supplies up to +100V/−100V. Its serial digital interface controls all eight switches via an 8-bit shift register and latch, enabling precise high-voltage signal routing in medical transducer arrays.
For engineers reviewing the MAX4800CQI datasheet, MAX4800CQI pinout, MAX4800CQI application, or MAX4800CQI equivalent, this device supports critical timing-sensitive switching in ultrasonic beamforming and piezoelectric drive circuits where charge injection, off-isolation (−77dB at 5MHz), and fast turn-on/off (5µs) directly impact image resolution and signal fidelity.
Technical Context
The MAX4800CQI implements eight independent BCDMOS-based SPST switches, each with COM and NO terminals, controlled by an 8-bit serial interface with DIN, CLK, LE, and CLR signals. Its internal architecture includes a transparent 8-bit shift register and a programmable latch with power-on reset-ensuring all switches default open at startup.
It supports flexible high-voltage supply configurations: VPP/VNN = +100V/−100V, +185V/−15V, or +40V/−160V (VPP − VNN ≤ 200V), while its digital interface runs from a separate VDD supply (+2.7V to +13.2V). All logic inputs are +13.2V tolerant regardless of VDD level, enabling interoperability with higher-voltage controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | VNN +10V to VPP −10V - defines usable linear voltage swing across all 8 channels without distortion or clipping |
| On-Resistance (RONS) | 22Ω typical - ensures minimal insertion loss and thermal drift in high-current transducer drive paths |
| Off-Isolation | −77dB at 5MHz - suppresses crosstalk between adjacent channels in multi-element array scanning |
| Charge Injection | 350pC - limits voltage glitch on capacitive loads (e.g., piezoelectric elements) during switching |
| Switching Speed | 5µs turn-on/turn-off - enables precise timing control for phased-array ultrasound pulse sequencing |
| Digital Input Tolerance | +13.2V - allows direct interfacing with industrial microcontrollers or FPGAs without level-shifting |
| Quiescent Current (VDD) | 10µA - reduces standby power in battery-backed or portable diagnostic equipment |
Pinout & Package
The MAX4800CQI is housed in a 28-pin PLCC package (package code Q28-4), with lead-free RoHS-compliant construction and 1.27mm pitch. Pin 1 is located at the top-left corner when the notch faces upward.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| COM0–COM7 | Analog common terminals (8) | Input nodes for 8 independent SPST switches; must remain unconnected or within VNN–VPP range during power transitions |
| NO0–NO7 | Analog normally-open terminals (8) | Output nodes; connect to transducer elements or print-head drivers only when corresponding switch is latched ON |
| VPP / VNN | High-voltage supply rails | Support asymmetric operation (e.g., +40V/−160V); require ≥0.1µF ceramic bypassing to GND near pins |
| VDD / GND | Digital supply and reference | VDD accepts +2.7V to +13.2V; GND serves as logic and analog reference for digital interface |
| DIN / CLK / LE / CLR / DOUT | Serial control interface | Enable daisy-chaining of multiple devices; LE active-low updates latch; CLR high resets all switches open |
Key Features
| Feature | Design Value |
|---|---|
| Pin-compatible replacement for HV20220PJ | Enables drop-in upgrade in legacy printer and ultrasound modules without PCB redesign or layout changes |
| Low-charge-injection (350pC) | Mitigates transient voltage spikes on piezoelectric transducers, preserving signal integrity in time-gain compensation circuits |
| DC–10MHz analog bandwidth | Supports wideband ultrasonic pulse transmission (e.g., 1–10MHz imaging frequencies) without amplitude roll-off |
| Power-on reset function | Guarantees all 8 switches start in OFF state, preventing unintended high-voltage discharge during system boot |
| 22Ω on-resistance matching (±20%) | Ensures consistent channel-to-channel gain in beamforming networks, reducing image artifacts |
Applications
| Ultrasound Transducer Array Control | Industrial Printer Head Switching |
|---|---|
Use Scenario: Selecting individual elements in a 128-element phased-array probe for dynamic beam steering and focusing. IC Role / Device Role / Timing Role: High-voltage SPST switch routing HV pulses (±100V) to specific piezoelectric elements under FPGA-controlled serial timing. Use Value: 5µs switching and −77dB off-isolation minimize inter-element coupling, improving lateral resolution and contrast-to-noise ratio. |
Use Scenario: Driving electrostatic print heads requiring precise ±100V pulses per nozzle row in high-speed label printers. IC Role / Device Role / Timing Role: Digitally controlled high-voltage switch enabling per-nozzle activation with sub-microsecond edge alignment. Use Value: 22Ω RONS and 350pC charge injection reduce thermal stress and voltage overshoot, extending print-head lifetime. |
| Capacitive Load Discharge Support | Multi-Device Daisy-Chained Control |
Use Scenario: Managing residual charge on piezoelectric transducers after firing to prevent ghost echoes in echo reception windows. IC Role / Device Role / Timing Role: Analog switch providing defined discharge path during OFF state; used with external bleed resistors in MAX4800CQI systems. Use Value: Low off-leakage (<10µA) and controlled off-capacitance (4–18pF) ensure predictable decay time constants for clean receive-mode settling. |
Use Scenario: Coordinating 32-channel beamformer using four MAX4800CQI devices in series for full array coverage. IC Role / Device Role / Timing Role: Serial interface with DOUT-to-DIN daisy chain allows single-FPGA control of 32 switches with synchronized LE/CLR strobes. Use Value: Eliminates parallel bus routing congestion; 8-bit shift register enables compact firmware control with deterministic latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage analog switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HV20220PJ | Original Supertex part; identical pinout and function but lacks integrated power-on reset and has higher charge injection (500pC) | Legacy designs requiring exact second-source compatibility without firmware updates | Select HV20220PJ only if MAX4800CQI's power-on reset behavior conflicts with existing initialization sequence |
| MAX4801CQI | Same package and interface, but optimized for +185V/−15V supply (not ±100V); slightly higher RONS (27Ω typ) | Better suited for asymmetric HV supplies in inkjet printhead drivers where negative rail is near ground | Prefer MAX4800CQI for symmetric ±100V ultrasound systems; choose MAX4801CQI only when VNN > −40V is required |
Compared with HV20220PJ and MAX4801CQI, the MAX4800CQI delivers superior charge injection performance and guaranteed power-on safety for medical-grade ultrasound, while maintaining full pin compatibility with HV20220PJ-making it the optimal upgrade path for reliability-critical imaging platforms.
Availability
The MAX4800CQI is available at Aetrix Electronics and suitable for ultrasound imaging systems, industrial printer head drivers, and high-voltage test instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX4800CQI 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-voltage interface ICs for industrial, medical, and communications applications.
The MAX4800 family was developed specifically for high-reliability, high-channel-count ultrasonic beamforming and piezoelectric actuation, emphasizing low charge injection, robust HV isolation, and deterministic serial control.
FAQ
What is the maximum allowable VPP–VNN voltage difference for the MAX4800CQI?
The MAX4800CQI supports a maximum VPP–VNN differential of 200V, as specified in its Absolute Maximum Ratings. Valid configurations include +100V/−100V, +185V/−15V, and +40V/−160V. Exceeding 200V risks permanent damage. The MAX4800CQI must be operated within these limits to maintain reliable switching and avoid breakdown in the BCDMOS output stage.
Does the MAX4800CQI include integrated bleed resistors like the MAX4802?
No, the MAX4800CQI does not include integrated bleed resistors. That feature is exclusive to the MAX4802 variant, which adds 35kΩ resistors from each COM/NO terminal to RGND. The MAX4800CQI requires external bleed networks when driving highly capacitive loads such as piezoelectric transducers to ensure safe discharge between pulses.
Can the MAX4800CQI operate with VNN tied to ground?
Yes, the MAX4800CQI supports single-supply operation with VNN = 0V, allowing VPP up to +200V. However, the analog signal range becomes 0V to VPP −10V, and all COM/NO terminals must remain within that window during power-up/down. This mode is commonly used in industrial printer applications where only positive HV is needed.
What is the purpose of the RGND pin on the MAX4800CQI?
The MAX4800CQI does not have an RGND pin. RGND is present only on the MAX4802 variant to serve as the return node for its integrated 35kΩ bleed resistors. The MAX4800CQI uses a standard 28-pin PLCC footprint without RGND; its pin 12 is N.C. (no connection), unlike MAX4802CQI where pin 12 is RGND.
How does the power-on reset function affect the initial state of the MAX4800CQI switches?
The MAX4800CQI incorporates an internal power-on reset circuit that forces all eight switches to the OPEN (OFF) state at power-up, regardless of serial data or latch state. This ensures no unintended high-voltage connection occurs during system initialization-a critical safety feature in ultrasound and industrial equipment where accidental activation could damage transducers or print heads.
MAX4800CQI 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):
- 38Ohm
- Channel-to-Channel Matching (ΔRon):
- 1.9Ohm
- 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)
MAX4800CQI FAQ
1.How can I place an order for MAX4800CQI through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4800CQI 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 MAX4800CQI reliable?
The price and inventory of MAX4800CQI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4800CQI is usually 5 days.
3.What payment methods are accepted for MAX4800CQI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4800CQI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4800CQI?
MAX4800CQI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4800CQI 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 MAX4800CQI?
For technical support, including MAX4800CQI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4800CQI requirements.
6.How does Aetrix verify that MAX4800CQI is sourced from the original manufacturer or authorized distributors?
All MAX4800CQI 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 MAX4800CQI meets industry standards.
7.What is the process for return or replacement of MAX4800CQI?
All MAX4800CQI units undergo pre-shipment inspection (PSI). If there is an issue with MAX4800CQI, 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 MAX4800CQI part is unused and in its original packaging.
Return procedure for MAX4800CQI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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