MAX14808ETK+ by Analog Devices

Octal Three-Level/Quad Five-Level High-Voltage 2A Digital Pulsers with T/R Switch


The MAX14808/MAX14809 octal three-level/quad five-level, high-voltage (HV) pulser devices generate high-frequency HV bipolar pulses (up to ±105V) from low-voltage control logic inputs for driving piezoelectric transducers in ultrasound systems. All eight channels have embedded overvoltage-protection diodes and integrated active return-to-zero clamp. Both devices have embedded independent (floating) power supplies (FPS) and level shifters that allow signal transmission without the need for external HV capacitors. The MAX14808 also features eight integrated transmit/receive (T/R) switches. The MAX14809 does not have the T/R switch function. The devices feature two modes of operation: an octal three-level pulser mode (with integrated active return-to-zero clamp) or a quad five-level pulser mode. In octal three-level pulser mode, each channel is controlled by two logic inputs (DINN_/DINP_) and the active return to zero features half the current driving of the pulser 1A (typ). In quad five-level pulser mode, each channel is controlled by three logic inputs and the active return to zero has the same current driving of the pulser 2A (typ). The devices can operate both in clocked and transparent mode. In clocked mode, data inputs can be synchronized with a clean differential or single-ended clock to reduce phase noise associated with FPGA output signals that are detrimental for Doppler analysis. In transparent mode, the synchronization feature is disabled and output reflects the data input after a 18ns delay. Both devices feature adjustable maximum current (0.5A to 2A) to reduce power consumption when full current capability is not required. The devices feature integrated grass-clipping diodes (with low parasitic capacitance) for receive (Rx) and transmit (Tx) isolations. Both devices feature a damping circuit that can be activated as soon as the transmit burst is over. The damping circuit has a typical on-resistance of 500Ω. It fully discharges the pulser's output internal node before the grass-clipping diodes. The devices are available in a 68-pin (10mm x 10mm) TQFN package with an exposed pad and are specified over the -40°C to +85°C extended temperature range.

Where to Buy

Prices starting from US$49.66

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Features

Save Space (Optimized for High-Channel-Count Systems/Portable Systems) High Density Eight Channels (Three-Level Operation) Four Channels (Five-Level Operation) in One Package Integrated Low-Power T/R Switches (MAX14808) Direct Drive Architecture Eliminates External High-Voltage Capacitor No External Floating Power Supply (FPS) Required
High Density Eight Channels (Three-Level Operation) Four Channels (Five-Level Operation) in One Package
Eight Channels (Three-Level Operation)
Four Channels (Five-Level Operation) in One Package
Integrated Low-Power T/R Switches (MAX14808)
Direct Drive Architecture Eliminates External High-Voltage Capacitor
No External Floating Power Supply (FPS) Required
High Performance (Designed to Enhanced Image Quality) Excellent -43dBc (typ) THD for Second Harmonic at 5MHz Sync Function Eliminates Effects of FPGA Jitter and Improves Performance in Doppler Mode Low Propagation Delay 18ns (typ) Strong Active Return to Zero
Excellent -43dBc (typ) THD for Second Harmonic at 5MHz
Sync Function Eliminates Effects of FPGA Jitter and Improves Performance in Doppler Mode
Low Propagation Delay 18ns (typ)
Strong Active Return to Zero
Save Power Low Quiescent Power Dissipation (5.7mW/Channel in Octal Mode) Programmable Current Capability Shutdown Mode and Disable Transmit Mode
Low Quiescent Power Dissipation (5.7mW/Channel in Octal Mode)
Programmable Current Capability
Shutdown Mode and Disable Transmit Mode

Specifications

Configuration DPDT
# Channels 8
Functions PulserSwitch
VSUPPLY (Single) (V) (min) -105
VSUPPLY (Single) (V) (max) 105
VSUPPLY (Dual) (±V) (max) 100
Bandwidth (MHz) 20
Package/Pins TQFN/68
BudgetaryPrice (See Notes) 46.41


MAX14808ETK+ - Integrated Circuits by Analog Devices

HIGH VOLTAGE DIGITAL PULSER TQFN-68

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

IC Function High Voltage Digital Pulser
Supply Voltage Min 1.7V
Supply Voltage Max 5.25V
IC Package Type TQFN
No. of Pins 68Pins
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
Automotive Qualification Standard -
MSL MSL 2A - 4 weeks
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

Octal HV Digital Pulser + T/R | Analog Devices
HIGH VOLTAGE DIGITAL PULSER, TQFN-68 | element14
High Voltage Digital Pulser, 5.25V, Tqfn | Newark Electronics
2A Digital Pulser 68-Pin TQFN EP | Avnet Asia

Frequently Asked Questions

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Is the MAX14808ETK+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

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