Dual/Quad, Unipolar/Bipolar, High-Voltage Digital Pulsers
Ideal for High-Voltage Applications Such As Portable Ultrasound Imaging and Industrial Flaw Detection
DescriptionThe 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.
- 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
|Part Number||Functions||Channels||VSUPPLY (Single)|
|See All Switches and Multiplexers (Mid and High Voltage) (299)|
| Pricing Notes: |
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
Technical DocumentsApp Note 5131 Maxim Addresses High-Voltage Needs in Industrial Ultrasound Applications
Tutorial 4696 Overview of Ultrasound Imaging Systems and the Electrical Components Required for Main Subfunctions
Quality and Environmental DataProduct Reliability Reports: MAX4940A.pdf
Lead-Free Package Tin (Sn) Whisker Reports
|Device||Fab Process||Technology||Sample size||Rejects||FIT at 25°C||FIT at 55°C|
- Optimized for Compact and Portable Applications
- Embedded Digital Resources for Beamforming
|App Note||5131||Maxim Addresses High-Voltage Needs in Industrial Ultrasound Applications|
|Tutorial||4696||Overview of Ultrasound Imaging Systems and the Electrical Components Required for Main Subfunctions|