Analog Devices Inc./Maxim Integrated MAX4802CCM+T

Overview

The MAX4802CCM+T from Maxim Integrated is an 8-channel, high-voltage SPST analog switch IC designed for ultrasound imaging and printer systems. It features integrated 35kΩ bleed resistors on each switch terminal, supports VPP/VNN supplies up to +100V/–100V (200V total), delivers ≤22Ω on-resistance, achieves –77dB off-isolation at 5MHz, and operates with digital inputs tolerant to +13.2V independent of VDD.

For engineers reviewing the MAX4802CCM+T datasheet, MAX4802CCM+T pinout, MAX4802CCM+T application, or MAX4802CCM+T equivalent, this page provides verified functional specifications, confirmed package mapping (48-pin TQFP), validated pin roles, real-world use context in medical transducer arrays and industrial print heads, and two documented alternative parts with explicit technical and application differences.

Technical Context

The MAX4802CCM+T implements eight independent high-voltage SPST switches fabricated in BCDMOS process, each with low-charge-injection (350pC) and low-capacitance (11pF off-capacitance) characteristics. Its serial interface uses an 8-bit shift register with latch enable (LE) and clear (CLR) control, supporting daisy-chaining via DOUT.

It operates across asymmetric high-voltage rails (e.g., +40V/–160V, +185V/–15V), maintains analog signal range from VNN + 10V to VPP – 10V, and includes a power-on reset that forces all switches open at startup. The integrated bleed resistors connect each COM/NO terminal to RGND, enabling passive discharge of piezoelectric loads without external components.

Key Specifications

Pinout & Package

MAX4802CCM+T is housed in a 48-pin TQFP (7mm × 7mm) package with exposed pad. Pin functions are validated per Maxim's official pin description table for MAX4802 TQFP. RGND (Pin 27) is unique to MAX4802 and connects internal bleed resistors to ground reference.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage analog switching applications.

Compared with HV232FG and MAX4800CCM+T, the MAX4802CCM+T uniquely integrates 35kΩ bleed resistors per channel while maintaining pin compatibility and identical timing/electrical performance-enabling safer, more compact designs in ultrasound and printing systems without layout changes.

Availability

MAX4802CCM+T is available at Aetrix Electronics and suitable for ultrasound imaging systems, industrial inkjet printers, capacitive load discharge circuits, and high-voltage test multiplexers requiring stable component supply and long-term design continuity.

Supply support for MAX4802CCM+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 semiconductor solutions for demanding industrial, medical, and communications applications.

The MAX4800/MAX4801/MAX4802 family was engineered specifically for high-voltage, low-distortion switching in ultrasound transducer arrays and printer head drivers-emphasizing charge injection control, HV rail flexibility, and integrated safety features like bleed resistors.

FAQ

What is the primary function of the RGND pin on the MAX4802CCM+T?

The RGND pin (Pin 27) serves as the dedicated ground reference for the MAX4802CCM+T's integrated 35kΩ bleed resistors. Each COM and NO terminal connects internally to RGND through its own resistor, enabling passive discharge of capacitive loads like piezoelectric transducers. This eliminates the need for external bleed networks and ensures safe, automatic voltage decay after switching events-critical in ultrasound and printing applications where rapid transducer reset is required.

Does the MAX4802CCM+T require specific power-supply sequencing for VPP, VNN, and VDD?

No, the MAX4802CCM+T does not require strict supply sequencing. However, analog inputs (COM_/NO_) must either be unconnected or held within VNN to VPP during power-up and power-down to prevent latch-up or damage. All three supplies-VDD (+2.7V to +13.2V), VPP (up to +185V), and VNN (down to –160V)-can be ramped independently, provided bypass capacitors (≥0.1µF ceramic) are placed close to their respective pins as specified in the MAX4802CCM+T datasheet.

How does the MAX4802CCM+T achieve its –77dB off-isolation at 5MHz?

The MAX4802CCM+T achieves –77dB off-isolation at 5MHz through optimized BCDMOS process design, low 11pF off-capacitance per switch, and guard-ring layout techniques that minimize capacitive coupling between adjacent channels. This performance is measured with 50Ω source and load impedances and directly enables clean signal routing in dense multi-element ultrasound arrays where crosstalk would otherwise corrupt echo data fidelity.

Can the MAX4802CCM+T be daisy-chained with other MAX4800-series devices?

Yes, the MAX4802CCM+T supports daisy-chaining via its DOUT pin, which outputs the DIN signal delayed by eight clock cycles. Multiple MAX4802CCM+T (or mixed MAX4800/MAX4801/MAX4802) devices can be connected in series-DOUT of one to DIN of the next-with shared CLK, LE, and CLR lines. A single 8-bit data stream configures all devices, and pulsing LE low simultaneously updates all latches, enabling synchronized switching across large channel counts.

What is the maximum peak current the MAX4802CCM+T can deliver per switch?

The MAX4802CCM+T supports a peak switch-output current of 2A (duty cycle ≤ 0.1%) per channel under VPP–VNN ≤ 200V conditions. This rating applies to COM_ and NO1–NO7 pins; NO0 is rated for 300mA peak. The specification ensures robust operation during short-duration, high-current pulses used in ultrasonic transducer excitation and inkjet nozzle firing-without exceeding junction temperature limits or degrading reliability.