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Analog Devices Inc./Maxim Integrated MAX4802ACCM+
- Part No.:
- MAX4802ACCM+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 48-LQFP
- Datasheet:
-
MAX4802ACCM+.pdf
- Description:
- IC SWITCH SPST-NOX8 38OHM 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,611
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Product details
Overview
MAX4802ACCM+ 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, -77dB off-isolation at 5MHz, 20MHz SPI™ serial interface, and integrated 35kΩ bleed resistors on each switch terminal for capacitive load discharge.
For engineers reviewing the MAX4802ACCM+ datasheet, MAX4802ACCM+ pinout, MAX4802ACCM+ application, or MAX4802ACCM+ equivalent, this page provides verified technical context, package-specific pin mapping, real-world use scenarios in medical transducer arrays and high-voltage print head control, and validated alternative options with documented functional differences.
Technical Context
The MAX4802ACCM+ integrates eight independent high-voltage SPST switches fabricated in BCDMOS process, each supporting analog-signal ranges from VNN + 10V to VPP − 10V across supply combinations up to VPP − VNN = 200V. Its 8-bit shift register accepts serial data at up to 20MHz and latches outputs via LE/CLR control signals.
Unlike the MAX4800A variant, the MAX4802ACCM+ includes dedicated RGND pins and internal 35kΩ bleed resistors connected between each COM_/NO_ terminal and RGND-enabling automatic discharge of piezoelectric transducer capacitance without external components. Digital inputs (DIN, CLK, LE, CLR) are +6V tolerant regardless of VDD level (2.7V–6V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Count & Type | 8 independent SPST analog switches, low-charge-injection architecture for precision signal routing |
| High-Voltage Supply Range | VPP/VNN = +100V/−100V, +185V/−15V, or +40V/−160V - supports asymmetric supplies up to 200V differential |
| On-Resistance (RONS) | 22Ω typical at +25°C, VPP = +100V/VNN = −100V, ICOM = 5mA - ensures minimal signal attenuation in high-fidelity analog paths |
| Off-Isolation | −77dB at 5MHz, RL = 50Ω - suppresses crosstalk between adjacent channels in multi-element transducer arrays |
| Charge Injection | 600pC max at VPP = +100V/VNN = −100V - minimizes voltage glitch on sensitive analog nodes during switching |
| Serial Interface Speed | 20MHz SPI™ clock rate - enables rapid reconfiguration of all 8 switches within 400ns per byte |
| Bleed Resistor Value | 35kΩ ±20% per switch terminal (COM_/NO_) referenced to RGND - discharges typical piezo loads in <1ms |
Pinout & Package
MAX4802ACCM+ is packaged in a 48-pin LQFP (7mm × 7mm, RoHS-compliant). Pin assignments are identical to the MAX4800ACCM+ but include dedicated RGND pins (Pin 27) and omit N.C. positions used in the MAX4800A variant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 8, 10, 12, 14, 16, 18, 20, 22, 39, 41, 43, 45, 47 | COM0–COM7 / NO0–NO7 | 16 analog terminals: 8 common (COMx) and 8 normally-open (NOx) switch ports - each pair forms one SPST channel |
| 24 | VPP | Positive high-voltage supply input - must be bypassed to GND with ≥0.1µF ceramic capacitor |
| 25 | VNN | Negative high-voltage supply input - must be bypassed to GND with ≥0.1µF ceramic capacitor |
| 27 | RGND | Bleed resistor ground reference - connects internally to all 35kΩ bleed resistors; requires low-impedance connection to system ground |
| 28 | GND | Digital/analog ground reference - separate from RGND; establishes logic threshold and VDD return path |
| 29 | VDD | Digital supply (2.7V–6V) - powers shift register, latch, and interface logic; bypass to GND with ≥0.1µF capacitor |
| 33–37, 48 | DIN, CLK, LE, CLR, DOUT | 20MHz SPI™ serial interface - DIN/CLK/LE/CLR are +6V tolerant; DOUT provides daisy-chain capability |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bleed resistors | 35kΩ per COM_/NO_ terminal tied to RGND - eliminates need for external discharge networks in ultrasound probe designs |
| Low-charge-injection switching | ≤600pC at ±100V supplies - prevents baseline shift in time-gain-controlled analog receive paths |
| Wide high-voltage operating range | VPP − VNN ≤ 200V with flexible combinations (+40V/−160V, +100V/−100V, +185V/−15V) - supports legacy and next-gen transducer biasing |
| DC to 50MHz analog bandwidth | Full signal passband up to 50MHz - preserves pulse fidelity in wideband ultrasonic transmit/receive applications |
| Power-on reset | Guaranteed open-state initialization - prevents unintended switch closure during power ramp-up in safety-critical medical systems |
Applications
| Ultrasound Transducer Array Control | High-Voltage Print Head Switching |
|---|---|
Use Scenario: Routing high-voltage excitation pulses to individual elements in phased-array ultrasound probes with >128-channel density. IC Role / Device Role / Timing Role: High-voltage SPST switch enabling selective element activation under microsecond-level timing control via 20MHz SPI™ interface. Use Value: Integrated 35kΩ bleed resistors discharge piezo capacitance between pulses, reducing dead time and enabling higher frame rates without external components. |
Use Scenario: Driving electrostatic print heads requiring precise ±100V switching in industrial inkjet systems. IC Role / Device Role / Timing Role: Eight independent high-voltage analog switches controlled by serial command stream to activate nozzle subsets synchronously. Use Value: 22Ω on-resistance and −77dB off-isolation minimize voltage droop and inter-nozzle crosstalk during high-speed printing cycles. |
| Capacitive Load Discharge System | Multi-Channel HV Signal Multiplexing |
Use Scenario: Automatic discharge of charged capacitive nodes (e.g., MEMS actuators, sensor bias networks) after power-down or mode change. IC Role / Device Role / Timing Role: Bleed resistor network referenced to RGND provides passive discharge path; switch state controls enable/disable of discharge path. Use Value: Eliminates need for discrete high-voltage resistors and relays, reducing PCB area and improving reliability in space-constrained modules. |
Use Scenario: Multiplexing multiple high-voltage analog sources (e.g., calibration references, HV DAC outputs) into shared measurement circuitry. IC Role / Device Role / Timing Role: Low-charge-injection, low-capacitance switches preserve signal integrity during channel selection in automated test equipment. Use Value: 4pF–11pF off-capacitance and 20V/ns slew rate support fast settling and minimal transient injection in precision HV measurement paths. |
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 |
|---|---|---|---|
| HV2303FG-G | Pin-compatible Supertex predecessor; no integrated bleed resistors; requires external discharge network | Lacks RGND pin and internal 35kΩ resistors - unsuitable where automatic capacitive discharge is required | Select only if existing layout uses HV2303FG-G and external bleed resistors are already implemented |
| MAX4802ACXZ+ | Same functionality and bleed resistors, but in 26-bump CSBGA package - different thermal resistance (θJA = 85°C/W vs. 44°C/W) and footprint | Smaller board area but higher junction-to-ambient thermal resistance - not suitable for high-power continuous switching | Choose for space-constrained portable ultrasound devices where thermal load is low and reworkability is less critical |
Compared with HV2303FG-G and MAX4802ACXZ+, the MAX4802ACCM+ offers identical bleed resistor functionality in a thermally superior 48-pin LQFP package (θJA = 44°C/W), making it optimal for high-duty-cycle ultrasound transmit applications requiring reliable heat dissipation and proven manufacturability.
Availability
MAX4802ACCM+ is available at Aetrix Electronics and suitable for ultrasound imaging systems, industrial print head drivers, and high-voltage test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX4802ACCM+ 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, mixed-signal, and high-voltage ICs for demanding industrial, medical, and communications applications.
The MAX4800A/MAX4802A product line targets high-voltage analog switching in ultrasound and printing systems, emphasizing low charge injection, integrated discharge paths, and robust serial control for multi-channel scalability.
FAQ
What is the maximum allowable VPP − VNN voltage difference for MAX4802ACCM+?
The MAX4802ACCM+ supports a maximum differential voltage of 200V between VPP and VNN. Valid supply combinations include +100V/−100V, +185V/−15V, and +40V/−160V. Exceeding 200V risks permanent damage, as confirmed in the Absolute Maximum Ratings table on page 2 of the datasheet. The MAX4802ACCM+ does not require symmetrical supplies, but VPP must remain ≤ (VNN + 200V).
Does MAX4802ACCM+ require external bleed resistors for piezoelectric transducer discharge?
No. The MAX4802ACCM+ integrates 35kΩ bleed resistors on each COM_ and NO_ terminal, connected internally to the RGND pin (Pin 27). This eliminates the need for external discharge components in ultrasound probe designs. External resistors are only required if higher discharge current or faster decay is needed beyond the 35kΩ default value.
How does the power-on reset function behave in MAX4802ACCM+?
At power-up, the MAX4802ACCM+ asserts a built-in power-on reset that forces all eight switches to the open (off) state, regardless of serial data loaded into the shift register. This behavior is guaranteed across the full 0°C to +70°C commercial temperature range and ensures safe startup in medical imaging systems where unintended conduction could damage transducers or distort beamforming.
Can MAX4802ACCM+ operate with VDD = 3.3V while interfacing with 5V microcontrollers?
Yes. All digital inputs (DIN, CLK, LE, CLR) on the MAX4802ACCM+ are +6V tolerant independent of VDD level, which can range from +2.7V to +6V. When VDD = 3.3V, the logic thresholds adjust automatically (VIH ≈ VDD − 0.75V = 2.55V), allowing direct connection to standard 3.3V or 5V controllers without level-shifting circuitry.
What is the purpose of the RGND pin on MAX4802ACCM+?
The RGND pin (Pin 27) serves as the dedicated reference node for the internal 35kΩ bleed resistors connected to each COM_ and NO_ terminal. It must be connected to a low-impedance system ground point separate from the main GND (Pin 28) to ensure predictable discharge timing and avoid noise coupling into the digital logic ground. Failure to properly route RGND degrades bleed performance and may cause residual voltage on switched nodes.
MAX4802ACCM+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Active
- 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:
- 48-LQFP (7x7)
MAX4802ACCM+ FAQ
1.How can I place an order for MAX4802ACCM+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4802ACCM+ 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 MAX4802ACCM+ reliable?
The price and inventory of MAX4802ACCM+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4802ACCM+ is usually 5 days.
3.What payment methods are accepted for MAX4802ACCM+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4802ACCM+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4802ACCM+?
MAX4802ACCM+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4802ACCM+ 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 MAX4802ACCM+?
For technical support, including MAX4802ACCM+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4802ACCM+ requirements.
6.How does Aetrix verify that MAX4802ACCM+ is sourced from the original manufacturer or authorized distributors?
All MAX4802ACCM+ 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 MAX4802ACCM+ meets industry standards.
7.What is the process for return or replacement of MAX4802ACCM+?
All MAX4802ACCM+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4802ACCM+, 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 MAX4802ACCM+ part is unused and in its original packaging.
Return procedure for MAX4802ACCM+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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