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Analog Devices Inc./Maxim Integrated MAX4802ACQI+
- Part No.:
- MAX4802ACQI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-LCC (J-Lead)
- Datasheet:
-
MAX4802ACQI+.pdf
- Description:
- IC SWITCH SPST-NOX8 38OHM 28PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,160
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Product details
Overview
MAX4802ACQI+ from Maxim Integrated is an 8-channel, high-voltage SPST analog switch IC designed for ultrasound imaging and printer systems. It delivers low-charge-injection (≤600pC), 22Ω typical on-resistance, 20MHz SPI™ serial interface control, ±100V/±160V high-voltage supply flexibility, and integrated 35kΩ bleed resistors on each switch terminal for capacitive load discharge.
For engineers reviewing the MAX4802ACQI+ datasheet, MAX4802ACQI+ pinout, MAX4802ACQI+ application, or MAX4802ACQI+ equivalent, this page provides verified technical context, real-world design meaning of key specs, package-specific pin mapping, confirmed alternatives for HV analog switching, and supply-chain support details for production deployment.
Technical Context
The MAX4802ACQI+ integrates eight independent BCDMOS-based SPST switches with a dedicated 8-bit shift register and programmable latch, enabling precise digital control over high-voltage analog paths. Its serial interface supports daisy-chaining via DOUT-to-DIN cascading and features power-on reset to ensure all switches default open.
It operates across asymmetric high-voltage rails (e.g., +40V/−160V, +100V/−100V, +160V/−40V) with VPP − VNN ≤ 200V, while digital logic runs from a separate +2.7V to +6V VDD supply. Digital inputs (DIN, CLK, LE, CLR) are +6V tolerant regardless of VDD level, and RGND provides reference for integrated bleed resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Count & Type | 8 independent SPST analog switches with COM/NO terminals per channel |
| On-Resistance (RONS) | 22Ω typical at +100V/−100V, +25°C - enables low insertion loss in high-fidelity signal paths |
| Charge Injection | 600pC max at +100V/−100V - minimizes voltage glitch during switching in precision transducer drivers |
| Off-Isolation | −77dB at 5MHz - ensures strong channel-to-channel signal rejection in multi-element arrays |
| Serial Interface Speed | 20MHz SPI™ clock rate - supports rapid reconfiguration of all 8 channels within <500ns |
| Bleed Resistor Value | 35kΩ per switch terminal (to RGND) - actively discharges piezoelectric capacitance between pulses |
| Analog Signal Range | VNN +10V to VPP −10V - accommodates wide dynamic range signals without clipping |
Pinout & Package
MAX4802ACQI+ is packaged in a 28-pin PLCC (plastic leaded chip carrier) with 0.050″ lead pitch and JEDEC MS-026 standard outline. The package includes internal thermal enhancement and is RoHS-compliant (+ suffix).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1–2, 4, 6–7, 9, 11, 13, 15, 17, 19, 21, 23, 26 | N.C. | No internal connection - unused pins; must be left floating or tied to GND per layout guidelines |
| 3, 8, 10, 12, 14, 16, 18, 20, 22, 24, 25, 39, 41, 43, 45, 47 | COM0–COM7 / NO0–NO7 | Eight pairs of analog switch terminals - COMx connects to signal source, NOx to load (e.g., transducer element) |
| 27 | RGND | Reference ground for integrated bleed resistors - must be connected to system ground with low-inductance path |
| 28 | GND | Digital/analog common ground - bypass to VDD/VPP/VNN with 0.1µF ceramic capacitors |
| 29 | VDD | +2.7V to +6V digital supply - powers shift register, latch, and logic; tolerant of 0.1µF local decoupling |
| 33–37 | DIN, CLK, LE, CLR, DOUT | 20MHz SPI™ interface signals - LE active-low latches data; CLR high resets all switches open |
| 24, 25 | VPP, VNN | High-voltage supplies - support asymmetric rails up to +160V/−40V; VPP − VNN ≤ 200V absolute limit |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Bleed Resistors | 35kΩ per COM/NO terminal referenced to RGND - eliminates need for external discharge networks in ultrasound probe designs |
| Low-Charge-Injection Switching | ≤600pC at +100V/−100V - reduces transient voltage spikes that distort echo signal integrity |
| Wide High-Voltage Supply Range | VPP = +40V to (VNN + 200V); VNN = −160V to −15V - supports legacy and next-gen transducer bias schemes |
| DC to 50MHz Analog Bandwidth | Full small-signal passband up to 50MHz - preserves pulse fidelity in broadband ultrasonic imaging |
| +6V-Tolerant Digital Inputs | DIN/CLK/LE/CLR accept up to +6V regardless of VDD - simplifies interfacing with 5V microcontrollers or FPGAs |
Applications
| Ultrasound Imaging Systems | Industrial Print Head Drivers |
|---|---|
|
Use Scenario: Beamforming in phased-array ultrasound probes with 64–256 elements requiring fast, low-distortion channel selection. IC Role / Device Role / Timing Role: High-voltage analog switch controlling excitation path to individual piezoelectric transducers; sequenced via 20MHz SPI™ for sub-microsecond timing resolution. Use Value: Integrated 35kΩ bleed resistors discharge transducer capacitance between pulses, preventing residual charge buildup that degrades image contrast and axial resolution. |
Use Scenario: Driving high-voltage piezoelectric print heads in industrial inkjet printers requiring precise voltage sequencing across multiple nozzles. IC Role / Device Role / Timing Role: Eight-channel SPST switch routing bias voltage to individual nozzle electrodes; controlled by FPGA via daisy-chained SPI™ interface. Use Value: 22Ω on-resistance and −77dB off-isolation at 5MHz minimize crosstalk and power loss, ensuring consistent drop formation and print quality. |
| Medical Diagnostic Equipment | Automated Test Equipment (ATE) |
|
Use Scenario: Signal routing in portable ultrasound machines where space, thermal budget, and reliability are critical constraints. IC Role / Device Role / Timing Role: High-voltage analog multiplexer selecting between transmit/receive paths and calibration references under microcontroller control. Use Value: Power-on reset guarantees all switches start open, eliminating risk of unintended high-voltage shorts during boot-up sequences. |
Use Scenario: High-voltage stimulus switching in semiconductor parametric testers requiring accurate DC and AC signal injection into DUTs. IC Role / Device Role / Timing Role: Precision analog switch enabling programmable connection of ±100V sources to device pins; configured via isolated digital interface. Use Value: 0.01% on-resistance matching (ΔRONS) ensures uniform current distribution across parallel test channels, improving measurement repeatability. |
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 |
|---|---|---|---|
| HV2303PJ-G | Pin-compatible Supertex predecessor; lacks integrated bleed resistors and has higher RONS (35Ω typ.) | Requires external bleed network for transducer discharge; less suitable for compact ultrasound modules | Select when legacy compatibility is mandatory and board space allows discrete resistor placement |
| MAX4802ACCM+ | Same functionality in 48-pin LQFP; larger footprint but better thermal dissipation (θJA = 44°C/W vs. 44°C/W for PLCC) | Better suited for high-duty-cycle operation or ambient >+60°C; requires PCB redesign | Select for new designs needing enhanced thermal margin or daisy-chain scalability beyond 28-pin layout limits |
Compared with HV2303PJ-G and MAX4802ACCM+, the MAX4802ACQI+ uniquely combines PLCC package compactness, integrated bleed resistors, and 22Ω on-resistance-making it optimal for space-constrained, high-reliability ultrasound front-ends where external components must be minimized.
Availability
MAX4802ACQI+ is available at Aetrix Electronics and suitable for ultrasound imaging systems, industrial print head drivers, medical diagnostic equipment, and automated test equipment requiring stable component supply, long-term manufacturability, and RoHS-compliant sourcing.
Supply support for MAX4802ACQI+ 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 high-performance analog, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.
The MAX4800A/MAX4802A product line was engineered specifically for high-voltage, low-distortion analog switching in ultrasound and precision printing-emphasizing charge injection control, wide supply flexibility, and robust serial configurability.
FAQ
What is the maximum allowable voltage difference between VPP and VNN for the MAX4802ACQI+?
The MAX4802ACQI+ specifies an absolute maximum VPP − VNN voltage of 200V. This limit applies across all supported supply combinations-including +40V/−160V, +100V/−100V, and +160V/−40V-ensuring safe operation of the internal BCDMOS switches and preventing dielectric breakdown in the high-voltage path.
Does the MAX4802ACQI+ require special power-supply sequencing during startup?
No, the MAX4802ACQI+ does not require strict sequencing of VDD, VPP, or VNN. However, analog inputs (COM_/NO_) must remain unconnected or held within VNN ≤ V ≤ VPP during power-up and power-down. The internal power-on reset ensures all switches default to the open state regardless of supply ramp order.
How do the integrated bleed resistors in the MAX4802ACQI+ function, and what is their design impact?
The MAX4802ACQI+ integrates 35kΩ bleed resistors between each COM_ and NO_ terminal and the RGND pin. These resistors actively discharge capacitive loads-such as piezoelectric transducers-between switching events, eliminating residual voltage that causes image artifacts or print misfires. RGND must be connected directly to system ground with minimal impedance.
Can multiple MAX4802ACQI+ devices be daisy-chained, and how is synchronization achieved?
Yes, multiple MAX4802ACQI+ devices can be daisy-chained using the DOUT output connected to the DIN input of the next device. Synchronization is achieved by driving shared CLK, LE, and CLR signals: pulsing LE low simultaneously updates all latches, while asserting CLR high opens all switches across the chain in one atomic operation.
What is the guaranteed on-resistance matching (ΔRONS) specification for the MAX4802ACQI+?
The MAX4802ACQI+ guarantees on-resistance matching of ≤20% (typical 5%) across its eight channels under matched conditions (VPP = +100V, VNN = −100V, VCOM_ = 0V, ICOM = 5mA). This tight matching ensures uniform current distribution in parallel-switched configurations-critical for beamforming accuracy and multi-nozzle print consistency.
MAX4802ACQI+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NO
- 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 ~ 6V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 5µs, 5µs
- -3db Bandwidth:
- -
- Charge Injection:
- -
- Channel Capacitance (CS(off), CD(off)):
- 18pF
- Current - Leakage (IS(off)) (Max):
- 2µA
- Crosstalk:
- -80dB @ 5MHz
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-PLCC (11.51x11.51)
MAX4802ACQI+ FAQ
1.How can I place an order for MAX4802ACQI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4802ACQI+ 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 MAX4802ACQI+ reliable?
The price and inventory of MAX4802ACQI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4802ACQI+ is usually 5 days.
3.What payment methods are accepted for MAX4802ACQI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4802ACQI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4802ACQI+?
MAX4802ACQI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4802ACQI+ 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 MAX4802ACQI+?
For technical support, including MAX4802ACQI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4802ACQI+ requirements.
6.How does Aetrix verify that MAX4802ACQI+ is sourced from the original manufacturer or authorized distributors?
All MAX4802ACQI+ 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 MAX4802ACQI+ meets industry standards.
7.What is the process for return or replacement of MAX4802ACQI+?
All MAX4802ACQI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4802ACQI+, 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 MAX4802ACQI+ part is unused and in its original packaging.
Return procedure for MAX4802ACQI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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