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Analog Devices Inc./Maxim Integrated MAX4968AECM+T
- Part No.:
- MAX4968AECM+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 48-LQFP
- Datasheet:
-
MAX4968AECM+T.pdf
- Description:
- IC SW SPST-NOX16 34OHM 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
MAX4968AECM+T 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 low-voltage logic control of high-voltage analog paths in medical ultrasound probe multiplexing.
For engineers reviewing the MAX4968AECM+T datasheet, MAX4968AECM+T pinout, MAX4968AECM+T application, or MAX4968AECM+T equivalent, this page delivers verified electrical specs, validated daisy-chain timing, confirmed bleed resistor integration, and precise package-level thermal data for ultrasound front-end design validation.
Technical Context
The MAX4968AECM+T uses SOI HVCMOS process technology to integrate high-voltage bilateral MOS switches with low-power CMOS logic, enabling efficient control of ±100V analog signals without dedicated high-voltage supplies. Its 16-bit serial shift register supports daisy-chaining and features latch-enable (LE) and clear (CLR) inputs for synchronized multi-device updates.
Each channel includes integrated 40kΩ bleed resistors (typ) to discharge piezoelectric transducer capacitance, reducing residual voltage and improving echo fidelity. The device operates with VDD = +2.37V to +5.5V, VPP = +10V (±0.5V), and VNN = -200V to 0V - eliminating need for +100V supplies required by legacy alternatives like HV2701.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 18Ω typ at VPP = +10V, VNN = -100V - ensures minimal insertion loss in high-fidelity ultrasound transmit paths |
| Analog Signal Range | VNN to VNN + 210V - supports ±100V burst transmission for medical imaging transducers |
| Bleed Resistor Value | 40kΩ typ per terminal - discharges capacitive loads to <15mV DC offset, critical for echo recovery accuracy |
| Small-Signal Bandwidth | 50MHz (-3dB, CLOAD = 200pF) - preserves integrity of low-amplitude receive echoes |
| Off-Isolation | -80dB typ at 5MHz (50Ω) - prevents crosstalk between adjacent channels during multi-probe scanning |
| Serial Interface Speed | 25MHz max CLK frequency - enables full 16-bit configuration in ≤640ns for real-time beamforming |
| Supply Voltages | VPP = +10V (not +100V), VNN = -200V - eliminates need for costly high-voltage regulators in portable systems |
Pinout & Package
MAX4968AECM+T is housed in a 48-pin LQFP (7mm × 7mm) package with exposed pad, specified for -40°C to +85°C operation. Thermal resistance is θJA = 44°C/W and θJC = 10°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW0A–SW15A, SW0B–SW15B | Analog switch terminals (16× SPST) | High-voltage bidirectional path; each pair connects one transducer element to transmit/receive chain |
| VNN | Negative high-voltage supply | -200V capable rail; shared with transmitter stage to reduce power supply count |
| VPP | Positive high-voltage supply | +10V (not +100V); bypassed with ≥0.1µF ceramic capacitor for low-noise switching |
| VDD | Logic supply | +2.37V to +5.5V CMOS-compatible rail; powers serial interface and latch logic |
| DIN, CLK, LE, CLR, DOUT | Serial control interface | Daisy-chainable 16-bit shift register with active-low latch enable and asynchronous clear |
| GND | Reference ground | Common return for logic, analog, and bypass capacitors; requires low-inductance layout |
| N.C. | No connection | Pins 1, 2, 14, 16, 24, 35, 36 - must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Latch-free architecture | Transparent latch operation with LE-controlled update timing eliminates metastability in multi-device sync |
| Integrated bleed resistors | 40kΩ (typ) per switch terminal - actively discharges transducer capacitance to maintain baseline stability between pulses |
| No dedicated HV supply | +10V VPP replaces +100V rails - reduces BOM cost, PCB area, and EMI filtering complexity |
| RON flatness | 2% variation across full 210VP-P input range - preserves linearity in wide-dynamic-range ultrasound bursts |
| Low charge injection | 150pC - minimizes transient glitches on sensitive receive paths during switching |
| Daisy-chain capability | Single CLK/LE/CLR bus controls up to N devices via DOUT→DIN cascade - scales channel count without GPIO expansion |
Applications
| Medical Ultrasound Probe Multiplexing | Industrial NDT Transducer Switching |
|---|---|
|
Use Scenario: Selecting among 64–128 piezoelectric elements in handheld or cart-based ultrasound probes using time-division multiplexing. IC Role / Device Role / Timing Role: High-voltage analog switch managing ±100V transmit bursts and mV-level echo returns per channel. Use Value: Integrated 40kΩ bleed resistors ensure <15mV residual DC offset, enabling accurate baseline restoration before echo sampling. |
Use Scenario: Routing high-voltage pulses to multiple ultrasonic transducers in weld inspection or material thickness gauging systems. IC Role / Device Role / Timing Role: Bidirectional SPST switch handling 210VP-P bursts at 500kHz–30MHz while maintaining -80dB off-isolation. Use Value: 18Ω RON and 2% RON flatness preserve pulse shape fidelity across full voltage range, critical for defect resolution. |
| High-Voltage Printer Head Control | Multi-Probe Ultrasound Mainframe Switching |
|
Use Scenario: Driving electrostatic or piezoelectric print heads requiring precise high-voltage waveform control in industrial printers. IC Role / Device Role / Timing Role: Linear analog switch modulating ±100V waveforms with <±70mV output voltage spike. Use Value: 50MHz small-signal bandwidth supports fast rise/fall times needed for high-resolution dot placement. |
Use Scenario: Centralized switching of transmit/receive paths across 4 probe interfaces in diagnostic ultrasound mainframes. IC Role / Device Role / Timing Role: Daisy-chained 16-channel switches synchronized via shared LE/CLR for deterministic channel reconfiguration. Use Value: 25MHz serial interface allows full 16-bit update in <640ns, enabling sub-millisecond probe switching during volume scanning. |
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 |
|---|---|---|---|
| MAX14803 | Pin-to-pin compatible; identical 48-LQFP footprint and bleed resistor integration but requires VPP = +100V | Used in legacy ultrasound designs with existing +100V supply infrastructure | Select MAX14803 only if +100V rail is already present; MAX4968AECM+T reduces system cost by eliminating it |
| HV2701 | Pin-to-pin compatible; same bleed resistors and 16-channel SPST topology but lacks daisy-chain DOUT and has lower 10MHz serial speed | Suitable for simpler, non-synchronized multi-switch systems without timing-critical updates | Choose HV2701 for cost-sensitive NDT tools where daisy-chain coordination is unnecessary |
Compared with MAX14803 and HV2701, MAX4968AECM+T uniquely combines +10V VPP operation, 25MHz daisy-chain interface, and guaranteed 2% RON flatness - delivering lower system power, faster reconfiguration, and superior linearity for next-generation ultrasound platforms.
Availability
MAX4968AECM+T is available at Aetrix Electronics and suitable for medical ultrasound imaging, industrial NDT equipment, and high-voltage printer head control requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX4968AECM+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) designs precision analog, mixed-signal, and high-reliability ICs for demanding industrial, medical, and communications applications.
The MAX4968AECM+T belongs to Maxim's high-voltage analog switch product line, engineered specifically for ultrasound and NDT systems requiring low-distortion, high-isolation switching of ±100V signals under microcontroller control.
FAQ
What is the maximum analog signal voltage the MAX4968AECM+T can handle?
The MAX4968AECM+T supports an analog dynamic signal range from VNN to VNN + 210V, enabling ±100V operation when VNN = -100V. This is validated per Absolute Maximum Ratings and Electrical Characteristics tables, with guaranteed performance up to 210VP-P AC signals above 500kHz. The device maintains linearity and low distortion across this full range.
Does the MAX4968AECM+T require a +100V supply voltage?
No, the MAX4968AECM+T requires only +10V (typ, ±0.5V) on VPP - not +100V. This is a key differentiator from pin-compatible alternatives like HV2701 and MAX14803. The +10V VPP supply significantly simplifies power architecture, reduces cost, and lowers EMI compared to traditional high-voltage analog switches.
How do the integrated bleed resistors in the MAX4968AECM+T improve ultrasound system performance?
The MAX4968AECM+T integrates 40kΩ (typ) bleed resistors on each switch terminal to discharge capacitive loads such as piezoelectric transducers. This reduces residual DC offset to ±15mV, ensuring clean baseline restoration before echo sampling - directly improving signal-to-noise ratio and image clarity in medical ultrasound systems.
Can multiple MAX4968AECM+T devices be controlled simultaneously?
Yes, the MAX4968AECM+T supports daisy-chaining via its DOUT pin, allowing serial data from one device to feed the DIN of the next. With shared CLK, LE, and CLR lines, all devices update synchronously on LE low pulse - enabling deterministic, glitch-free reconfiguration of 32+, 48+, or more channels in ultrasound beamforming systems.
What is the on-resistance matching specification for the MAX4968AECM+T?
The MAX4968AECM+T guarantees ±3% on-resistance matching (ΔRON) between channels under typical conditions (VPP = +10V, VNN = -100V, ISW_ = 5mA). This tight matching ensures uniform gain and phase response across all 16 channels - essential for coherent beamforming and artifact-free ultrasound image reconstruction.
MAX4968AECM+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:
- 16
- On-State Resistance (Max):
- 34Ohm
- Channel-to-Channel Matching (ΔRon):
- 1.02Ohm
- Voltage - Supply, Single (V+):
- 2.3V ~ 5.5V
- 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)
MAX4968AECM+T FAQ
1.How can I place an order for MAX4968AECM+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4968AECM+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 MAX4968AECM+T reliable?
The price and inventory of MAX4968AECM+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4968AECM+T is usually 5 days.
3.What payment methods are accepted for MAX4968AECM+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4968AECM+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4968AECM+T?
MAX4968AECM+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4968AECM+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 MAX4968AECM+T?
For technical support, including MAX4968AECM+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4968AECM+T requirements.
6.How does Aetrix verify that MAX4968AECM+T is sourced from the original manufacturer or authorized distributors?
All MAX4968AECM+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 MAX4968AECM+T meets industry standards.
7.What is the process for return or replacement of MAX4968AECM+T?
All MAX4968AECM+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4968AECM+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 MAX4968AECM+T part is unused and in its original packaging.
Return procedure for MAX4968AECM+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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