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Status

Active: In Production.

Description

Request Full Data Sheet The MAX4940/MAX4940A integrated circuits generate high-voltage, high-frequency, unipolar or bipolar pulses from low-voltage logic inputs. These quad/dual pulsers feature independent logic inputs, independent high-voltage pulser outputs with active clamps and independent high-voltage supply inputs. The MAX4940/MAX4940A feature quad, high-voltage pulsers with 8.5Ω output impedance for the high-voltage outputs and a 21Ω impedance for the active clamp. The high-voltage outputs can provide 2.0A (typ) output current. All devices use two logic inputs per channel to control the positive and negative pulses. The MAX4940/MAX4940A have a dedicated input to control the active clamp. All devices feature an independent enable input EN. All digital inputs are CMOS compatible (see the Ordering Information/Selector Guide in the full data sheet). The MAX4940/MAX4940A are available in a 56-pin, 8mm x 8mm, TQFN exposed pad package and are specified over the 0°C to +70°C commercial temperature range. Warning: Exercise caution. The MAX4940/MAX4940A are designed to operate with high voltages.

Key Features		Applications/Uses
High-Density Quad-Channel Pulser in One Package 0 to +220V Unipolar or ±110V Bipolar Outputs 8.5Ω (typ) Output Impedance and 2.0A (typ) Output Current 21Ω (typ) Always-On Active Clamp with Integrated Blocking Diodes Integrated Output Diodes (MAX4940A Only) No Special Power-Supply Sequencing Required for Trilevel Applications Matched Rise/Fall Times and Matched Propagation Delays CMOS-Compatible Logic Inputs 56-Pin, 8mm x 8mm, TQFN Package		Cleaning Equipment Flaw Detection Piezoelectric Drivers Test Instruments Ultrasound Medical Imaging

Design Guides

Signal Routing & Protection (PDF) Medical (PDF)

Reliability Reports

Reliability Report: MAX4940.pdf MAX4940A.pdf Show FIT data for: MAX4940

Software/Models

none

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-6 of 6

MAX4940	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX4940EVKIT+			Active	Land Pattern: Not Available		See data sheet
MAX4940MB+			Active	Land Pattern: Not Available	0°C to +70°C	See data sheet
MAX4940CTN+T			Active	Land Pattern: Not Available	0°C to +70°C	See data sheet
MAX4940CTN+			Active	TQFN;56 pin;65.6 mm² Outline Drawing: 21-0135 (PDF) Land Pattern: 90-0047 (PDF) Use pkgcode/variation: T5688+3*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX4940A	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX4940ACTN+T			Active	Land Pattern: Not Available	0°C to +70°C	See data sheet
MAX4940ACTN+			Active	TQFN;56 pin;65.6 mm² Outline Drawing: 21-0135 (PDF) Land Pattern: 90-0047 (PDF) Use pkgcode/variation: T5688+3*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis

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New Product Press Release 2009-11-12

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