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Analog Devices Inc./Maxim Integrated MAX4802ACCM+T
- Part No.:
- MAX4802ACCM+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 48-LQFP
- Datasheet:
-
MAX4802ACCM+T.pdf
- Description:
- IC SWITCH SPST-NOX8 38OHM 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
MAX4802ACCM+T from Maxim Integrated is an 8-channel, high-voltage SPST analog switch IC designed for ultrasound imaging and printer systems. It features low-charge-injection (≤600pC), 22Ω typical on-resistance at +100V/–100V supplies, –77dB off-isolation at 5MHz, and a 20MHz SPI-compatible serial interface. The device operates with flexible high-voltage rails up to VPP – VNN = 200V and integrates 35kΩ bleed resistors on each switch terminal.
For engineers reviewing the MAX4802ACCM+T datasheet, MAX4802ACCM+T pinout, MAX4802ACCM+T application, or MAX4802ACCM+T equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use-value in medical transducer switching and precision print-head control, and validated alternative options for high-voltage analog routing.
Technical Context
The MAX4802ACCM+T implements an 8-bit serial shift register with transparent latch, controlled by DIN, CLK, LE (active-low), and CLR inputs. All eight switches are updated synchronously upon LE assertion, enabling deterministic timing in multi-channel ultrasonic beamforming.
Its BCDMOS process enables simultaneous high-voltage operation (VPP up to +160V, VNN down to –160V) and logic-level digital interface (VDD = +2.7V to +6V), with +6V-tolerant DIN/CLK/LE/CLR pins independent of VDD. RGND provides dedicated ground reference for integrated bleed resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Count & Type | 8 independent SPST analog switches, each with COM and NO terminals |
| Max High-Voltage Range | VPP – VNN ≤ 200V; supports asymmetric rails including +40V/–160V, +100V/–100V, +160V/–40V |
| On-Resistance (Typ) | 22Ω at VPP = +100V, VNN = –100V, ICOM = 5mA, TA = +25°C - ensures minimal signal attenuation in wideband analog paths |
| Off-Isolation | –77dB at 5MHz, RL = 50Ω - critical for crosstalk suppression in dense transducer arrays |
| Charge Injection | 600pC at VPP = +100V/VNN = –100V - enables stable DC-coupled biasing of piezoelectric elements |
| Serial Interface Speed | 20MHz clock rate (VDD = +5V) - allows full 8-bit update in ≤400ns for real-time channel reconfiguration |
| Bleed Resistor Value | 35kΩ per switch terminal (COM/NO to RGND) - actively discharges capacitive loads like piezo transducers between pulses |
Pinout & Package
MAX4802ACCM+T is packaged in a 48-pin LQFP (7mm × 7mm, RoHS-compliant). Pin functions are validated per Maxim's official pin descriptions for MAX4802A LQFP variant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1–48 (see mapping) | Terminals for 8 SPST switches, digital I/O, power, and ground | Each COMx/NOx pair routes high-voltage analog signals; DIN/CLK/LE/CLR/DOUT enable daisy-chainable serial control |
| COM0–COM7 | Analog common terminals | High-voltage return path for connected transducers or print-head drivers; rated VNN to VPP |
| NO0–NO7 | Analog normally-open terminals | Switched high-voltage outputs; open-circuit when unselected, low-impedance path to COMx when selected |
| DIN, CLK, LE, CLR, DOUT | Serial interface signals | +6V-tolerant logic inputs/outputs; LE active-low latches shift-register data to switches; CLR high resets all switches open |
| VPP, VNN, VDD, GND, RGND | Power and reference supplies | VPP/VNN supply high-voltage analog path; VDD powers logic; RGND is dedicated ground for bleed resistors (MAX4802A only) |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bleed resistors | 35kΩ per COM/NO terminal tied to RGND - eliminates external discharge networks for piezo transducer settling |
| Low-charge-injection switching | ≤600pC at ±100V - prevents voltage glitches on sensitive high-impedance analog nodes during switching |
| Wide analog bandwidth | DC to 50MHz signal range - supports both pulsed ultrasound excitation and high-frequency print-head modulation |
| Flexible high-voltage supply | VPP – VNN ≤ 200V with asymmetry support - simplifies power architecture in systems requiring non-symmetric HV rails |
| 20MHz serial interface | Full 8-bit update in <400ns - enables rapid channel selection in time-of-flight ultrasound beam steering |
Applications
| Ultrasound Transducer Multiplexing | Industrial Print-Head Control |
|---|---|
Use Scenario: Selecting individual piezoelectric elements in phased-array ultrasound probes for beam steering and focusing. IC Role / Device Role / Timing Role: High-voltage SPST switch controlling excitation path between HV pulse generator and transducer element; synchronized via 20MHz serial bus. Use Value: 600pC charge injection and –77dB off-isolation minimize acoustic crosstalk and image artifacts; integrated bleed resistors ensure fast transducer discharge between pulses. |
Use Scenario: Driving high-voltage waveforms to thermal or piezoelectric print-heads in industrial label printers and 3D inkjet systems. IC Role / Device Role / Timing Role: Analog switch routing HV drive signals to individual nozzles; serial interface enables compact microcontroller-based nozzle sequencing. Use Value: 22Ω on-resistance preserves waveform fidelity at 50kHz switching; VPP/VNN flexibility supports diverse print-head voltage requirements (±40V to ±100V). |
| Medical Imaging Beamformer | Capacitive Load Discharge System |
Use Scenario: Real-time reconfiguration of transmit/receive paths in portable ultrasound scanners with limited PCB space. IC Role / Device Role / Timing Role: 8-channel analog switch providing low-latency, deterministic channel selection under microcontroller SPI control. Use Value: 400ns max update time enables sub-microsecond channel switching; LQFP package supports automated assembly in compact handheld form factors. |
Use Scenario: Safe discharge of stored energy in high-capacitance transducer arrays after power-down or fault conditions. IC Role / Device Role / Timing Role: Integrated 35kΩ bleed resistors on every COM/NO terminal provide passive discharge path to RGND without external components. Use Value: Eliminates need for discrete bleed networks; reduces BOM count and layout area while ensuring <10ms discharge time for 1nF loads. |
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; lower max clock rate (10MHz); higher on-resistance (≈35Ω) | Lacks RGND and bleed functionality; requires external discharge circuitry for piezo loads | Select HV2303FG-G only if legacy compatibility or cost sensitivity outweighs need for integrated bleed and faster serial interface |
| MAX4802ACQI+ | Same die, 28-pin PLCC package; identical electrical specs; different thermal resistance (θJA = 44°C/W vs. 44°C/W for LQFP) | Same functional performance but larger footprint and through-hole assembly; less suitable for high-density SMT layouts | Choose MAX4802ACQI+ only for PLCC-requiring legacy designs or manual prototyping; LQFP offers superior thermal and space efficiency |
Compared with HV2303FG-G and MAX4802ACQI+, the MAX4802ACCM+T delivers unique value via integrated 35kΩ bleed resistors and 20MHz serial speed in a compact 48-pin LQFP-enabling smaller, safer, and more responsive high-voltage analog routing in ultrasound and industrial printing.
Availability
MAX4802ACCM+T is available at Aetrix Electronics and suitable for ultrasound imaging systems, industrial printer controllers, and medical beamformer modules requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX4802ACCM+T 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 high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX4802A product line was designed specifically for high-voltage, low-distortion analog switching in ultrasound and precision printing-emphasizing charge injection control, flexible rail operation, and integrated safety features like bleed resistors.
FAQ
What is the maximum allowable voltage difference between VPP and VNN for the MAX4802ACCM+T?
The MAX4802ACCM+T specifies an absolute maximum VPP – VNN voltage of 200V. This limit applies regardless of individual rail values-for example, +160V/–40V, +100V/–100V, or +40V/–160V are all valid configurations. Exceeding 200V risks permanent damage, and the device does not guarantee operation beyond this differential, even if individual rail voltages remain within their separate absolute ratings.
Does the MAX4802ACCM+T require special power-supply sequencing during startup?
No, the MAX4802ACCM+T does not require strict sequencing of VDD, VPP, or VNN. However, analog inputs (COMx, NOx) must either be left unconnected or held within VNN ≤ V ≤ VPP during power-up and power-down. The internal power-on reset ensures all switches default to open state, preventing unintended conduction before system initialization completes.
How do the integrated bleed resistors function in the MAX4802ACCM+T?
The MAX4802ACCM+T integrates 35kΩ resistors between each COMx and NOx terminal and the RGND pin. These resistors provide a defined discharge path for capacitive loads-such as piezoelectric transducers-when switches are open. RGND must be connected to system ground or a low-impedance return node; it is not internally tied to GND and serves exclusively for bleed resistor biasing.
Can multiple MAX4802ACCM+T devices be daisy-chained using the DOUT pin?
Yes, the DOUT pin of the MAX4802ACCM+T outputs the DIN data delayed by eight clock cycles, enabling seamless daisy-chaining. Connect DOUT of one device to DIN of the next, while sharing CLK, LE, and CLR across all devices. A single LE pulse updates all chained devices simultaneously, supporting scalable channel expansion without additional control lines.
What is the purpose of the RGND pin on the MAX4802ACCM+T?
The RGND pin on the MAX4802ACCM+T serves solely as the reference node for the integrated 35kΩ bleed resistors on each COMx and NOx terminal. It is not internally connected to GND and must be externally tied to a clean, low-noise ground point. Using RGND instead of GND isolates bleed current from digital and analog ground returns, preserving signal integrity in sensitive high-voltage systems.
MAX4802ACCM+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX4802ACCM+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4802ACCM+T 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+T reliable?
The price and inventory of MAX4802ACCM+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4802ACCM+T is usually 5 days.
3.What payment methods are accepted for MAX4802ACCM+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4802ACCM+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4802ACCM+T?
MAX4802ACCM+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4802ACCM+T 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+T?
For technical support, including MAX4802ACCM+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4802ACCM+T requirements.
6.How does Aetrix verify that MAX4802ACCM+T is sourced from the original manufacturer or authorized distributors?
All MAX4802ACCM+T 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+T meets industry standards.
7.What is the process for return or replacement of MAX4802ACCM+T?
All MAX4802ACCM+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4802ACCM+T, 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+T part is unused and in its original packaging.
Return procedure for MAX4802ACCM+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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