Analog Devices Inc./Maxim Integrated MAX14803CCM+

Overview

MAX14803CCM+ from Maxim Integrated is a 16-channel, high-voltage analog SPST switch IC designed for ultrasound imaging probe and printer high-voltage signal routing. It features HVCMOS process technology, 16 individually programmable switches, integrated 35kΩ bleed resistors per terminal, and operates with VPP/VNN up to +100V/–100V (200V total) or +40V/–160V (200V total). Its 20MHz serial interface and low 5µA quiescent current support precision medical transducer control.

For engineers reviewing the MAX14803CCM+ datasheet, MAX14803CCM+ pinout, MAX14803CCM+ application, or MAX14803CCM+ equivalent, key selection criteria include its 48-pin LQFP package, commercial temperature range (0°C to +70°C), integrated bleed resistors (distinguishing it from MAX14802), ±100V/–100V high-voltage supply capability, and daisy-chainable 16-bit serial interface with latch enable and clear inputs.

Technical Context

The MAX14803CCM+ implements a 16-bit serial shift register with transparent latch, enabling precise channel-by-channel switching control via DIN/CLK/LE/CLR signals referenced to a separate +2.7V to +5.5V VDD supply. Its analog path supports DC-to-20MHz signal bandwidth with <3.5µs turn-on/off time and –77dB off-isolation at 5MHz (RL = 50Ω).

Each of the 16 COM_/NO_ switch pairs includes clamping diodes at COM_ for positive overvoltage protection and-uniquely among the family-integrated 35kΩ bleed resistors to discharge capacitive loads like piezoelectric transducers. Power-on reset ensures all switches default open.

Key Specifications

Pinout & Package

MAX14803CCM+ is housed in a 48-pin LQFP (7mm × 7mm) package with exposed pad, RoHS-compliant (indicated by '+' suffix), and thermal resistance θ_JA = 44°C/W on a four-layer board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX14802CCM+, MAX14803CCM+ adds essential bleed resistors for transducer discharge without layout changes; compared with MAX14803AEWZ+, it trades WLP miniaturization and extended temperature for lower-cost LQFP assembly and commercial-grade qualification.

Availability

MAX14803CCM+ is available at Aetrix Electronics and suitable for ultrasound imaging systems, industrial printers, and high-voltage test equipment requiring stable component supply, long-term production continuity, and RoHS-compliant packaging.

Supply support for MAX14803CCM+ 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-voltage ICs for medical, industrial, and communications applications.

The MAX1480x family targets high-voltage analog switching in ultrasound and printing systems, emphasizing low charge injection, integrated protection, and robust serial control for demanding signal-path applications.

FAQ

What is the maximum allowable VPP–VNN differential voltage for MAX14803CCM+?

The MAX14803CCM+ supports a maximum VPP–VNN differential of 250V, as confirmed in the Absolute Maximum Ratings table. For the MAX14803CCM+ variant specifically, this is achieved with configurations such as +100V/–100V (200V), +40V/–160V (200V), or +200V/0V (200V). The datasheet explicitly states "(MAX14802CCM+, MAX14803CCM+)… VPP – VNN Supply Voltage = 260V" is not permitted; the correct limit is 250V per the Electrical Characteristics section and ordering guide.

Does MAX14803CCM+ include bleed resistors, and how do they function?

Yes, MAX14803CCM+ includes integrated 35kΩ bleed resistors on each COM_ and NO_ terminal, connecting to GND. These resistors automatically discharge capacitive loads (e.g., piezoelectric transducers) after switch turn-off, eliminating the need for external discharge circuits. This feature distinguishes MAX14803CCM+ from MAX14802CCM+ and is confirmed in the General Description, Functional Diagram footnote, and Ordering Information table.

What is the operating temperature range specified for MAX14803CCM+?

The MAX14803CCM+ is specified for the commercial temperature range of 0°C to +70°C, as stated in both the General Description and the Ordering Information/Selector Guide. This is distinct from the extended-range MAX14803AEWZ+ (–40°C to +85°C) and MAX14802ECM+ (–40°C to +85°C), and applies to all electrical characteristics unless otherwise noted.

Can MAX14803CCM+ be daisy-chained with other devices, and what pins enable this?

Yes, MAX14803CCM+ supports daisy-chaining via its DOUT pin, which outputs shifted data delayed by 16 clock cycles. To chain multiple devices, connect DOUT of one MAX14803CCM+ to DIN of the next, while sharing CLK, LE, and CLR across all devices. This configuration is documented in Figure 3 and Applications Information, enabling scalable control of large switch arrays from a single microcontroller SPI interface.

How does the power-on reset function behave in MAX14803CCM+?

The MAX14803CCM+ incorporates an internal power-on reset circuit that forces all 16 switches to the open (off) state at power-up, regardless of input conditions. This behavior is guaranteed by design and ensures safe default operation in ultrasound and printer systems where unintended high-voltage connection could damage transducers or print heads. The reset affects both the 16-bit shift register and latch, as described in the Detailed Description section.