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Analog Devices Inc./Maxim Integrated MAX4968ECM+
- Part No.:
- MAX4968ECM+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 48-LQFP
- Datasheet:
-
MAX4968ECM+.pdf
- Description:
- IC SW SPST-NOX16 34OHM 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,908
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Product details
Overview
MAX4968ECM+ from Maxim Integrated is a 16-channel, high-linearity, bidirectional SPST analog switch with 18Ω typical on-resistance, ±100V analog signal range (210VP-P), and +10V VPP/–200V VNN high-voltage supplies-designed for ultrasound transmit path switching in medical imaging systems where low-voltage logic controls high-voltage analog signals.
For engineers reviewing the MAX4968ECM+ datasheet, MAX4968ECM+ pinout, MAX4968ECM+ application, or MAX4968ECM+ equivalent, this page delivers verified electrical specs, LQFP-48 terminal mapping, real-world ultrasound probe/mainframe integration context, and validated drop-in alternatives with precise supply voltage and bleed-resistor distinctions.
Technical Context
The MAX4968ECM+ uses SOI HVCMOS process technology to integrate high-voltage bilateral MOS switches with low-power CMOS logic, enabling efficient control of ±100V analog signals using only +10V VPP-eliminating need for dedicated +100V supplies required by legacy alternatives. Its 16-bit serial interface supports daisy-chaining and features latch-enable (LE) and clear (CLR) inputs for synchronized multi-device control.
It delivers DC-to-30MHz small-signal bandwidth (CLOAD = 200pF), <–45dB 2nd-harmonic distortion at 2MHz ±90V pulse, and guaranteed RON flatness across full input range-critical for preserving pulse fidelity in time-gain-compensated ultrasound receive chains and high-fidelity transmit burst switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Count & Type | 16 independent SPST analog switches; enables channel-select routing in multi-probe ultrasound systems without signal degradation. |
| On-Resistance (RON) | 18Ω typical (VPP = +10V, VNN = –100V); ensures minimal insertion loss and thermal drift in high-current transmit paths. |
| Analog Signal Range | VNN to VNN + 210V (e.g., –100V to +110V); supports bipolar ±100V burst transmission and unipolar 210VP-P operation in transducer drivers. |
| Supply Voltages | VPP = +9.5V to +10.5V, VNN = –200V to 0V, VDD = +2.37V to +5.5V; eliminates need for +100V rails-reduces BOM count and improves system safety. |
| Bandwidth | DC to 30MHz small-signal (CLOAD = 200pF); preserves echo fidelity in wideband receive paths and enables fast transmit switching. |
| Off-Isolation | –76dB at 2MHz (50Ω); prevents crosstalk between active and inactive channels during multi-beam scanning. |
| Charge Injection | 150pC; minimizes baseline shift in sensitive low-noise amplifiers following the switch in receive chains. |
Pinout & Package
Package: 48-pin LQFP (7mm × 7mm), RoHS-compliant, with exposed pad for thermal management. Requires 0.1µF ceramic bypass capacitors on VDD, VPP, and VNN pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW0A–SW15A, SW0B–SW15B | Analog Switch Terminals (32 pins) | 16 independent SPST switch pairs; each pair connects/disconnects high-voltage analog paths (e.g., transducer elements to HV drivers). |
| VNN (Pin 13) | Negative High-Voltage Supply | Accepts –200V to 0V; shared with transmitter stage-no isolated negative rail needed. |
| VPP (Pin 15) | Positive High-Voltage Supply | +9.5V to +10.5V; replaces +100V rails used by MAX14802/HV2601-simplifies power architecture. |
| VDD (Pin 18) | Logic Supply | +2.37V to +5.5V; interfaces directly with FPGA/CPLD control logic without level-shifting. |
| DIN, CLK, LE, CLR, DOUT (Pins 19–23) | Serial Control Interface | 16-bit SPI-compatible interface with daisy-chain capability; LE latches state, CLR resets all switches to OFF. |
| GND (Pin 17) | Ground Reference | Common return for logic and analog sections; must be low-impedance to minimize noise coupling into HV paths. |
Key Features
| Feature | Design Value |
|---|---|
| No dedicated high-voltage supply | Operates from +10V VPP instead of +100V-reduces transformer count, EMI, and safety certification burden in ultrasound systems. |
| RON flatness guaranteed | ±2% variation over full analog input range-maintains consistent gain and linearity across entire transmit/receive voltage swing. |
| Low charge injection (150pC) | Minimizes transient voltage spikes at amplifier inputs-critical for preserving dynamic range in low-noise receive chains. |
| Daisy-chainable serial interface | Single CLK/LE/CLR bus controls up to dozens of devices-enables scalable channel expansion in 64–128-channel ultrasound front-ends. |
| Power-on reset | Ensures all 16 switches default to OFF at startup-prevents unintended HV discharge or transducer excitation during boot. |
Applications
| Medical Ultrasound Probe Switching | Ultrasound Mainframe Transmit Routing |
|---|---|
Use Scenario: Selecting among 2–4 transducer probes per channel in handheld or cart-based systems, routing HV bursts to specific piezoelectric elements while isolating inactive paths. IC Role / Device Role / Timing Role: High-voltage analog switch array controlling transmit path connectivity; operates synchronously with beamforming timing pulses. Use Value: Enables probe multiplexing without adding isolation relays-reducing size, cost, and failure points in portable ultrasound devices. |
Use Scenario: Routing high-voltage transmit signals from centralized HV drivers to individual transducer arrays in multi-probe mainframes. IC Role / Device Role / Timing Role: Channel-select switch matrix in transmit beamformer; activated during transmit window, disabled during echo reception. Use Value: Replaces bulky electromechanical relays-improving switching speed (<5µs tON/tOFF), reliability, and channel density. |
| Industrial NDT Transducer Multiplexing | Laser Printer HV Bias Switching |
Use Scenario: Scanning large metal or composite structures using phased-array NDT probes, requiring rapid switching between 16+ element groups. IC Role / Device Role / Timing Role: High-voltage analog multiplexer managing burst sequencing across transducer sub-arrays; driven by FPGA-controlled serial interface. Use Value: Supports >50kHz switching rates with <–76dB off-isolation-preventing false echoes and enabling high-resolution defect imaging. |
Use Scenario: Controlling bias voltage application to photoreceptor drums or transfer rollers in high-speed laser printers and copiers. IC Role / Device Role / Timing Role: Precision HV switch regulating DC bias levels (±100V) during toner development and transfer stages. Use Value: Delivers <±15mV DC offset (MAX4968A variant) and low leakage (<1nA)-ensuring consistent image density and reduced background fogging. |
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 |
|---|---|---|---|
| MAX14802 | +100V VPP supply required; identical pinout and logic interface; no integrated bleed resistors. | Requires dedicated +100V supply rail-increases power design complexity and safety certification scope. | Select MAX14802 only if legacy +100V infrastructure exists and bleed resistors are unnecessary. |
| Supertex HV2601 | +100V VPP; same 48-pin LQFP footprint; lacks daisy-chain DOUT and latch-clear (CLR) functionality. | Not suitable for synchronized multi-device control in scalable ultrasound front-ends. | Choose HV2601 only for single-device, non-daisy-chained applications where CLR is unused. |
Compared with MAX14802 and HV2601, the MAX4968ECM+ reduces system-level HV supply count by eliminating the +100V rail, adds daisy-chain capability for modular channel expansion, and retains full pin compatibility-making it a direct upgrade path without PCB redesign.
Availability
MAX4968ECM+ is available at Aetrix Electronics and suitable for medical ultrasound imaging, industrial NDT equipment, and high-speed laser printer designs requiring stable component supply, long-term lifecycle support, and traceable sourcing for Class II medical device manufacturing.
Supply support for MAX4968ECM+ 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-reliability ICs for industrial, medical, and communications applications.
The MAX4968ECM+ belongs to Maxim's high-voltage analog switch product line, engineered specifically for ultrasound and NDT systems where low-voltage logic must safely and linearly control ±100V analog signals without external HV supplies.
FAQ
What is the maximum analog signal voltage the MAX4968ECM+ can handle?
The MAX4968ECM+ supports an analog signal range from VNN to VNN + 210V. With VNN = –100V, this enables ±100V bipolar operation or 210VP-P unipolar signals. Absolute maximum ratings allow VNN down to –200V, extending usable range to –200V to +10V when VNN = –200V. This specification is confirmed in the Electrical Characteristics table under "Analog Dynamic Signal Range".
Does the MAX4968ECM+ require a +100V supply like older high-voltage switches?
No-the MAX4968ECM+ requires only +10V for VPP, unlike MAX14802 or HV2601 which demand +100V. This is explicitly stated in the General Description and Applications Information sections: "In typical ultrasound applications, these devices do not require dedicated high-voltage supply." The +10V VPP significantly simplifies power design and improves safety compliance.
How does the MAX4968ECM+ differ from the MAX4968AECM+ variant?
The MAX4968ECM+ has no integrated bleed resistors, whereas MAX4968AECM+ includes 40kΩ (typ) shunt resistors on each switch terminal to discharge capacitive loads. This difference is documented in the Ordering Information table and Bleed Resistors section. MAX4968ECM+ is selected when external discharge paths exist or when lowest leakage (<1nA) is prioritized over automatic discharge.
Can multiple MAX4968ECM+ devices be controlled from a single microcontroller?
Yes-the MAX4968ECM+ supports daisy-chaining via its DOUT pin, which outputs shifted data after 16 clock cycles. By connecting DOUT of one device to DIN of the next, and sharing CLK, LE, and CLR lines, a single microcontroller can control up to dozens of MAX4968ECM+ units. This is detailed in Figure 4 and the Daisy-Chaining Multiple Devices section.
What is the typical on-resistance and its variation across signal range?
The MAX4968ECM+ has 18Ω typical on-resistance (RONS) at VPP = +10V, VNN = –100V, and 5mA current. Its RON flatness is guaranteed at ±2% across the full input range, as specified in the Electrical Characteristics table under "Small-Signal On-Resistance Flatness"-ensuring consistent signal integrity in wide-dynamic-range ultrasound applications.
MAX4968ECM+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- 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)
MAX4968ECM+ FAQ
1.How can I place an order for MAX4968ECM+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4968ECM+ 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 MAX4968ECM+ reliable?
The price and inventory of MAX4968ECM+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4968ECM+ is usually 5 days.
3.What payment methods are accepted for MAX4968ECM+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4968ECM+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4968ECM+?
MAX4968ECM+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4968ECM+ 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 MAX4968ECM+?
For technical support, including MAX4968ECM+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4968ECM+ requirements.
6.How does Aetrix verify that MAX4968ECM+ is sourced from the original manufacturer or authorized distributors?
All MAX4968ECM+ 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 MAX4968ECM+ meets industry standards.
7.What is the process for return or replacement of MAX4968ECM+?
All MAX4968ECM+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4968ECM+, 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 MAX4968ECM+ part is unused and in its original packaging.
Return procedure for MAX4968ECM+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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