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Analog Devices Inc./Maxim Integrated MAX4800CQI+T
- Part No.:
- MAX4800CQI+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-LCC (J-Lead)
- Datasheet:
-
MAX4800CQI+T.pdf
- Description:
- IC SWITCH SPST-NOX8 38OHM 28PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,055
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Product details
Overview
The MAX4800CQI+T from Maxim Integrated is an 8-channel, high-voltage SPST analog switch designed for ultrasound imaging transducer multiplexing and industrial printer head control. It delivers low-charge-injection (350pC), 22Ω on-resistance, -77dB off-isolation at 5MHz, and operates across VPP/VNN supply combinations up to ±100V, +185V/-15V, or +40V/-160V. Its serial digital interface supports daisy-chaining in multi-channel probe driver systems.
For engineers reviewing the MAX4800CQI+T datasheet, MAX4800CQI+T pinout, MAX4800CQI+T application, or MAX4800CQI+T equivalent, this page provides verified technical context, package-specific pin mapping for the 28-pin PLCC, real-world switching performance metrics, and validated drop-in alternatives for HV20220PJ-based designs.
Technical Context
The MAX4800CQI+T implements eight independent BCDMOS SPST switches with a shared 8-bit serial shift register and programmable latch. Control is delivered via DIN/CLK/LE/CLR signals tolerant to +13.2V regardless of VDD level (2.7V–13.2V), enabling direct interfacing with higher-voltage microcontrollers.
Each switch supports analog signal ranges from VNN +10V to VPP −10V, with turn-on/off times ≤5µs, 50kHz max switching frequency, and integrated power-on reset ensuring all channels default open. No bleed resistors are included-this distinguishes it from the MAX4802 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Channels | 8 independent SPST switches for transducer or print-head channel selection |
| On-Resistance (RONS) | 22Ω typical - ensures minimal signal attenuation and thermal rise at 200mA load |
| Charge Injection | 350pC - preserves signal integrity in precision ultrasound echo acquisition |
| Off-Isolation | -77dB at 5MHz - suppresses crosstalk between adjacent transducer elements |
| Supply Range (VPP/VNN) | +40V/-160V to +185V/-15V - supports asymmetric high-voltage biasing for piezoelectric drivers |
| Digital Interface Voltage Tolerance | +13.2V on DIN/CLK/LE/CLR - eliminates level-shifting when interfacing with 5V/12V controllers |
| Operating Temperature | 0°C to +70°C - qualified for commercial medical imaging and office equipment environments |
Pinout & Package
The MAX4800CQI+T is housed in a 28-pin PLCC (Plastic Leaded Chip Carrier) package with gull-wing leads, RoHS-compliant, and rated for surface-mount reflow assembly. Pin 1 is marked by a corner notch; the package outline matches Maxim's Q28-4 specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | COM0–COM7 | Common terminals for each of the 8 analog switches - connect to transducer common bus or print-head drive node |
| 9, 10, 11, 12, 13, 14, 15, 16 | NO0–NO7 | Normally-open terminals - route to individual transducer elements or print-nozzle electrodes |
| 17 | VPP | Positive high-voltage supply input - bypassed to GND with ≥0.1µF ceramic capacitor |
| 18 | VNN | Negative high-voltage supply input - bypassed to GND with ≥0.1µF ceramic capacitor |
| 19 | GND | Analog/digital ground reference - star-point connection required for noise-sensitive HV operation |
| 20 | VDD | Digital logic supply (2.7V–13.2V) - decoupled locally to minimize clock feedthrough |
| 21 | DIN | Serial data input - MSB-first 8-bit command loads shift register; +13.2V tolerant |
| 22 | CLK | Serial clock input - rising-edge triggered; supports up to 10MHz (VDD ≥4.5V) |
| 23 | LE | Latch enable (active-low) - updates switch states only when pulsed low after valid data load |
| 24 | CLR | Latch clear (active-high) - forces all switches open without affecting shift register contents |
| 25 | DOUT | Serial data output - delayed echo of DIN (8-clock cycle latency) for daisy-chaining |
| 26, 27, 28 | N.C. | No internal connection - left unconnected per design; no routing or termination required |
Key Features
| Feature | Design Value |
|---|---|
| Pin-compatible replacement for Supertex HV20220PJ | Direct PCB-level substitution in existing PLCC-28 layouts - no footprint or routing changes needed |
| Low-charge-injection switching (350pC) | Maintains baseline stability in time-gain-compensated ultrasound receivers by minimizing transient voltage spikes |
| Flexible high-voltage supply support | Operates across three standard HV rails: ±100V, +185V/-15V, +40V/-160V - simplifies power architecture reuse |
| DC to 10MHz analog bandwidth | Preserves pulse fidelity for wideband ultrasonic bursts and high-speed print-head actuation waveforms |
| Power-on reset function | Guarantees all 8 switches start in OFF state - prevents unintended transducer excitation at system startup |
| +13.2V-tolerant digital inputs | Enables direct connection to 5V or 12V microcontrollers without external level translators or clamping diodes |
Applications
| Ultrasound Transducer Multiplexing | Industrial Printer Head Control |
|---|---|
Use Scenario: Selecting individual piezoelectric elements in a 128-element linear array for beam steering and focusing. IC Role / Device Role / Timing Role: High-voltage SPST switch managing signal path between transmit/receive circuitry and transducer element. Use Value: 22Ω RONS and 350pC charge injection preserve echo amplitude and timing accuracy critical for B-mode image resolution. |
Use Scenario: Driving electrostatic or thermal inkjet nozzles requiring precise high-voltage pulses up to ±100V. IC Role / Device Role / Timing Role: Channel-select switch routing HV pulses from shared driver to discrete nozzle electrodes. Use Value: -77dB off-isolation at 5MHz prevents cross-talk between adjacent nozzles during high-frequency firing sequences. |
| Medical Imaging Probe Interface | High-Voltage Test Equipment Switching |
Use Scenario: Integrating into handheld ultrasound probes where space-constrained PLCC packaging and low quiescent current (<15µA) extend battery life. IC Role / Device Role / Timing Role: Analog path selector enabling single ASIC to service multiple transducer sub-arrays. Use Value: 0°C to +70°C rating and 5µs switching ensure reliable operation inside thermally isolated probe housings. |
Use Scenario: Automated test fixture routing HV signals between DUT ports and measurement instruments under software control. IC Role / Device Role / Timing Role: Remotely controlled HV switch matrix replacing manual patch panels in production test cells. Use Value: Daisy-chain capability (DIN/DOUT) allows synchronized configuration of 16+ MAX4800CQI+T devices using one MCU SPI port. |
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 |
|---|---|---|---|
| HV20220PJ | Original Supertex part; identical pinout, same 28-pin PLCC, but lacks Maxim's enhanced ESD robustness and tighter RONS matching (±20% vs ±15% typical) | Legacy designs already qualified with HV20220PJ require no layout change; newer designs benefit from MAX4800CQI+T's lower charge injection | Select MAX4800CQI+T for new designs requiring improved signal fidelity; retain HV20220PJ only for exact second-source compliance. |
| MAX4800CCM+T | Same functional spec, but in 48-pin TQFP package - larger footprint, better thermal dissipation, and higher power handling (1818mW vs 842mW) | Suitable for high-density multilayer boards with ample area; not interchangeable in PLCC-28 footprints | Choose MAX4800CCM+T when board layout allows TQFP and thermal management requires >842mW dissipation. |
Compared with HV20220PJ, the MAX4800CQI+T offers lower charge injection and tighter on-resistance matching, directly improving ultrasound image SNR; compared with MAX4800CCM+T, it enables compact probe integration via PLCC packaging but trades off thermal headroom and pin count scalability.
Availability
The MAX4800CQI+T is available at Aetrix Electronics and suitable for ultrasound imaging systems, industrial printer electronics, and high-voltage test instrumentation requiring stable component supply, long-term manufacturability, and drop-in compatibility with legacy HV20220PJ designs.
Supply support for MAX4800CQI+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 demanding industrial, medical, and communications applications.
The MAX4800 family was engineered specifically for high-voltage, low-distortion analog switching in ultrasound and precision printing systems - emphasizing charge injection control, HV supply flexibility, and robust serial interface operation.
FAQ
What is the maximum allowable VPP–VNN voltage difference for the MAX4800CQI+T?
The MAX4800CQI+T supports a maximum VPP–VNN differential voltage of 200V. Valid configurations include +100V/−100V, +185V/−15V, and +40V/−160V. Exceeding 200V violates absolute maximum ratings and may cause permanent device failure. The datasheet specifies VPP–VNN ≤ 200V across all operating conditions for the MAX4800CQI+T.
Does the MAX4800CQI+T include integrated bleed resistors?
No, the MAX4800CQI+T does not include integrated bleed resistors. That feature is exclusive to the MAX4802 variant (e.g., MAX4802CQI+T), which adds 35kΩ resistors from each switch terminal to RGND. The MAX4800CQI+T requires external discharge paths for capacitive loads like piezoelectric transducers.
Can the MAX4800CQI+T be used with a 3.3V microcontroller interface?
Yes, the MAX4800CQI+T supports VDD from +2.7V to +13.2V and its digital inputs (DIN, CLK, LE, CLR) are +13.2V tolerant regardless of VDD level. When VDD = 3.3V, logic thresholds adjust to VIH = VDD − 0.75V (≥2.55V) and VIL = 0.75V - fully compatible with standard 3.3V CMOS outputs without level shifting.
What is the purpose of the N.C. pins on the MAX4800CQI+T PLCC package?
Pins 26, 27, and 28 on the MAX4800CQI+T are designated N.C. (No Connection) - they have no internal bond wire or circuit connection. These pins must remain unconnected on the PCB; no routing, grounding, or decoupling is required or recommended. They exist for mechanical symmetry and package compatibility.
How does the power-on reset function behave in the MAX4800CQI+T?
The MAX4800CQI+T incorporates an internal power-on reset circuit that forces the 8-bit latch to zero on power-up, ensuring all eight switches default to the OFF (open) state. This behavior is guaranteed across the full 0°C to +70°C temperature range and eliminates risk of unintended high-voltage conduction during system initialization.
MAX4800CQI+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 ~ 13.2V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 5µs, 5µs
- -3db Bandwidth:
- -
- Charge Injection:
- 820pC
- Channel Capacitance (CS(off), CD(off)):
- 18pF
- Current - Leakage (IS(off)) (Max):
- 4µA
- Crosstalk:
- -80dB @ 5MHz
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-PLCC (11.51x11.51)
MAX4800CQI+T FAQ
1.How can I place an order for MAX4800CQI+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4800CQI+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 MAX4800CQI+T reliable?
The price and inventory of MAX4800CQI+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4800CQI+T is usually 5 days.
3.What payment methods are accepted for MAX4800CQI+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4800CQI+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4800CQI+T?
MAX4800CQI+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4800CQI+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 MAX4800CQI+T?
For technical support, including MAX4800CQI+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4800CQI+T requirements.
6.How does Aetrix verify that MAX4800CQI+T is sourced from the original manufacturer or authorized distributors?
All MAX4800CQI+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 MAX4800CQI+T meets industry standards.
7.What is the process for return or replacement of MAX4800CQI+T?
All MAX4800CQI+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4800CQI+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 MAX4800CQI+T part is unused and in its original packaging.
Return procedure for MAX4800CQI+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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