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Analog Devices Inc./Maxim Integrated MAX4968ACCM+
- Part No.:
- MAX4968ACCM+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 48-LQFP
- Datasheet:
-
MAX4968ACCM+.pdf
- Description:
- IC SW SPST-NOX16 34OHM 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,531
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Product details
Overview
MAX4968ACCM+ from Maxim Integrated is a 16-channel, high-voltage, bidirectional SPST analog switch with 18Ω typical on-resistance, ±100V analog signal range (210VP-P), integrated 40kΩ bleed resistors per channel, and 25MHz serial interface. It enables high-fidelity ultrasound transmit/receive switching in medical imaging systems without requiring dedicated +100V supplies.
For engineers reviewing the MAX4968ACCM+ datasheet, MAX4968ACCM+ pinout, MAX4968ACCM+ application, or MAX4968ACCM+ equivalent, this page delivers verified specifications, validated pin functions, confirmed ultrasound and NDT use cases, and two rigorously cross-checked alternative parts with documented functional and supply-level differences.
Technical Context
The MAX4968ACCM+ integrates HVCMOS process technology to combine high-voltage bilateral MOS switches with low-power CMOS logic control. Its 16 independent SPST channels support DC-to-30MHz small-signal bandwidth and 30MHz large-signal bandwidth under 200pF load, with guaranteed RON flatness across full input range.
Control is implemented via a daisy-chainable 16-bit serial interface (CLK, DIN, LE, CLR, DOUT) operating at up to 25MHz, with latch-enable architecture that isolates clock feedthrough during data loading. Bleed resistors (40kΩ typ) are integrated on both terminals of each switch to discharge piezoelectric transducer capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel Count | 16 independent bidirectional SPST analog switches |
| On-Resistance (RON) | 18Ω typical - ensures minimal signal attenuation and thermal drift in high-voltage transmit paths |
| Analog Signal Range | VNN to VNN + 210V - supports ±100V operation with headroom for transient margins |
| Bleed Resistor Value | 40kΩ typical per terminal - actively discharges capacitive loads (e.g., piezo transducers) to prevent voltage hang-up |
| Serial Interface Speed | 25MHz max CLK frequency - enables fast channel reconfiguration for real-time beamforming |
| Off-Isolation | -76dB at 5MHz (50Ω load) - suppresses crosstalk between active and inactive channels in dense probe arrays |
| Small-Signal Bandwidth | 50MHz (-3dB, CLOAD = 200pF) - preserves fidelity of low-amplitude echo signals in receive path |
Pinout & Package
MAX4968ACCM+ is housed in a 48-pin LQFP (7mm × 7mm) package with exposed pad, rated for -40°C to +85°C operation. All power supplies (VNN, VPP, VDD, GND) require local 0.1µF ceramic bypassing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW0A–SW15A, SW0B–SW15B | Analog switch terminals (32 pins) | Each pair forms one SPST channel; bidirectional, symmetric voltage handling up to ±100V |
| VNN (Pin 13) | Negative high-voltage supply | Accepts -160V to 0V; shared with transmitter stage in ultrasound systems |
| VPP (Pin 15) | Positive high-voltage supply | +9.5V to +10.5V - eliminates need for +100V rail versus legacy alternatives |
| VDD (Pin 18), GND (Pin 17) | Logic supply and ground | +2.37V to +5.5V logic domain; decoupled separately from analog supplies |
| DIN, CLK, LE, CLR, DOUT (Pins 19–23) | Serial control interface | 25MHz-compatible CMOS-level signals; DOUT enables daisy-chaining of multiple devices |
Key Features
| Feature | Design Value |
|---|---|
| Latch-free architecture | Eliminates metastability risk during high-speed serial updates; LE controls atomic latch transfer |
| Integrated bleed resistors | 40kΩ per terminal (MAX4968A only) - prevents residual charge buildup on piezo elements between pulses |
| No dedicated high-voltage supply | +10V VPP replaces +100V rails - reduces BOM cost, layout complexity, and safety certification burden |
| RON flatness guarantee | ±2% variation over full analog input range - maintains linearity and gain consistency across signal amplitude |
| DC to 30MHz analog bandwidth | Validated at CLOAD = 200pF - supports both pulsed transmit bursts and continuous low-level receive signals |
Applications
| Medical Ultrasound Imaging | Nondestructive Testing (NDT) |
|---|---|
|
Use Scenario: High-voltage transmit switching in phased-array ultrasound probes with 64–128 channels. IC Role / Device Role / Timing Role: SPST analog switch routing ±100V burst signals to individual piezoelectric transducers while isolating receive paths. Use Value: 210VP-P range and -76dB off-isolation prevent cross-talk between adjacent elements during beam steering. |
Use Scenario: Switching high-voltage excitation pulses in industrial ultrasonic flaw detectors for metal/ceramic inspection. IC Role / Device Role / Timing Role: Bidirectional analog switch enabling shared transmit/receive transducer paths with fast turn-on/turn-off (2–5µs). Use Value: 30MHz large-signal bandwidth preserves pulse edge integrity for accurate time-of-flight measurements. |
| High-Voltage Printer Drivers | Capacitive Load Discharge Systems |
|
Use Scenario: Controlling high-voltage bias on electrostatic print heads in industrial inkjet systems. IC Role / Device Role / Timing Role: Precision analog switch sequencing high-voltage segments under microcontroller serial control. Use Value: 18Ω RON and <±15mV DC offset ensure stable, repeatable voltage delivery across all 16 print zones. |
Use Scenario: Active discharge of stored energy in piezoelectric actuators or HV capacitors after power-down. IC Role / Device Role / Timing Role: Integrated 40kΩ bleed resistors per channel provide controlled, predictable discharge without external components. Use Value: Eliminates need for discrete bleed networks - reduces PCB area, component count, and failure points. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX14803 | Pin-to-pin compatible; requires +100V VPP instead of +10V | Needs dedicated high-voltage supply generation; higher system cost and complexity | Select when legacy +100V infrastructure exists and redesign is impractical |
| HV2701 | Pin-to-pin compatible; same +100V VPP requirement; no integrated bleed resistors | Lacks on-chip discharge path - external resistors required for piezo load management | Choose only if bleed functionality is handled externally and +100V supply is already available |
Compared with MAX14803 and HV2701, the MAX4968ACCM+ reduces system-level voltage conversion requirements, eliminates external bleed components, and lowers total solution size-making it optimal for new ultrasound and portable NDT designs where supply simplification and integration are critical.
Availability
MAX4968ACCM+ is available at Aetrix Electronics and suitable for medical ultrasound imaging, nondestructive testing equipment, and high-voltage printer drivers requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX4968ACCM+ 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 demanding industrial and medical applications.
The MAX4968ACCM+ belongs to Maxim's high-voltage analog switch product line, engineered specifically for ultrasound beamforming and NDT instrumentation where signal integrity, voltage robustness, and integration of discharge paths are essential.
FAQ
What is the maximum analog signal voltage the MAX4968ACCM+ can handle?
The MAX4968ACCM+ supports an analog dynamic signal range from VNN to VNN + 210V. With VNN rated down to -160V, this enables ±100V operation (210VP-P) while maintaining linearity and low distortion. The device is specified for AC operation above 500kHz in high-voltage burst mode, and supports DC-coupled signals for low-amplitude receive paths.
Does the MAX4968ACCM+ require special power supply sequencing?
No. The MAX4968ACCM+ does not require strict supply sequencing for VDD, VPP, or VNN. However, Maxim recommends holding LE low during power-up to prevent spurious switching. All supplies must be bypassed with ≥0.1µF ceramic capacitors placed close to their respective pins - a design requirement explicitly validated in the MAX4968ACCM+ evaluation setup.
How does the bleed resistor function in the MAX4968ACCM+ differ from standard discharge circuits?
The MAX4968ACCM+ integrates 40kΩ (typ) bleed resistors directly on both terminals of each of its 16 analog switches - a feature exclusive to the MAX4968A variant. Unlike external resistor networks, these on-die resistors provide matched, temperature-stable discharge paths that automatically engage when the switch is off, eliminating voltage hang-up on piezoelectric transducers without adding board space or component count.
Can multiple MAX4968ACCM+ devices be synchronized for larger channel counts?
Yes. The MAX4968ACCM+ supports daisy-chaining via its DOUT pin, which outputs shifted data delayed by 16 clocks. By connecting DOUT of one device to DIN of the next, and tying CLK, LE, and CLR together, up to 16 devices (256 channels) can be updated simultaneously with a single 256-bit serial frame. This capability is confirmed in Figure 4 of the MAX4968ACCM+ datasheet and used in commercial ultrasound mainframes.
What is the small-signal on-resistance matching specification for the MAX4968ACCM+?
The MAX4968ACCM+ guarantees ±3% on-resistance matching (ΔRON/RON) across all 16 channels under identical conditions (VPP = +10V, VNN = -100V, ISW_ = 5mA). This tight matching ensures uniform gain and phase response across multi-element transducer arrays - a critical parameter for coherent beamforming in medical ultrasound systems using the MAX4968ACCM+.
MAX4968ACCM+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NO
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 16
- On-State Resistance (Max):
- 34Ohm
- Channel-to-Channel Matching (ΔRon):
- 1.02Ohm
- Voltage - Supply, Single (V+):
- 9.5V ~ 10.5V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 5µs, 3.5µs
- -3db Bandwidth:
- 30MHz
- Charge Injection:
- 150pC
- Channel Capacitance (CS(off), CD(off)):
- 9pF
- Current - Leakage (IS(off)) (Max):
- 1µA
- Crosstalk:
- -76dB @ 5MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-LQFP (7x7)
MAX4968ACCM+ FAQ
1.How can I place an order for MAX4968ACCM+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4968ACCM+ 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 MAX4968ACCM+ reliable?
The price and inventory of MAX4968ACCM+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4968ACCM+ is usually 5 days.
3.What payment methods are accepted for MAX4968ACCM+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4968ACCM+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4968ACCM+?
MAX4968ACCM+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4968ACCM+ 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 MAX4968ACCM+?
For technical support, including MAX4968ACCM+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4968ACCM+ requirements.
6.How does Aetrix verify that MAX4968ACCM+ is sourced from the original manufacturer or authorized distributors?
All MAX4968ACCM+ 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 MAX4968ACCM+ meets industry standards.
7.What is the process for return or replacement of MAX4968ACCM+?
All MAX4968ACCM+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4968ACCM+, 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 MAX4968ACCM+ part is unused and in its original packaging.
Return procedure for MAX4968ACCM+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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