Microchip Technology MD0100DK6-G

Overview

MD0100DK6-G from Microchip Technology is a dual-channel, high-voltage, bi-directional, current-limiting T/R (transmit/receive) switch designed for ultrasound front-end protection. It functions as a normally closed, two-terminal switch per channel with 15Ω typical on-resistance, ±100V differential voltage withstand, and sub-20 ns turn-on/turn-off times-enabling safe coupling between high-voltage transmitters and low-noise receivers in medical imaging systems.

For engineers reviewing the MD0100DK6-G datasheet, MD0100DK6-G pinout, MD0100DK6-G application, or MD0100DK6-G equivalent, this device is evaluated for high-speed pulse isolation in ultrasound beamforming, NDT instrumentation, and precision data acquisition where transient voltage clamping, minimal signal path capacitance (21 pF ON), and zero external supply operation are critical selection criteria.

Technical Context

The MD0100DK6-G integrates two independent, self-powered T/R switch channels in an 8-lead DFN package. Each channel monitors the A–B terminal voltage difference and automatically transitions from low-resistance conduction (15Ω) to high-impedance blocking (±200 µA leakage) when |V_A–B| exceeds ±2 V-providing passive, bidirectional overvoltage protection without control logic or bias rails.

Its internal architecture enables simultaneous high-side and low-side switching behavior per channel, with fast transition timing (T_ON/T_OFF ≤ 20 ns), 100 MHz small-signal bandwidth, and voltage-dependent off-state capacitance (12–19 pF across 10–100 V), making it suitable for time-of-flight critical analog signal paths requiring minimal distortion and charge injection.

Key Specifications

Pinout & Package

MD0100DK6-G is housed in an 8-lead, 4 mm × 4 mm, exposed-pad DFN package (Microchip designation K6). The package features two isolated switch channels and non-connected COM terminals for thermal management.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage T/R switch applications.

Compared with MD0100N8-G, the MD0100DK6-G saves 50% board area and improves thermal performance by 3× (44 vs. 133°C/W); versus MAX4814ETA+T, it eliminates external supplies and control timing overhead-critical for portable ultrasound and battery-operated NDT gear.

Availability

MD0100DK6-G is available at Aetrix Electronics and suitable for medical ultrasound imaging, non-destructive testing instrumentation, and high-speed data acquisition systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MD0100DK6-G 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

Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and high-reliability interface solutions for industrial, automotive, and medical markets.

The MD0100DK6-G belongs to Microchip's high-voltage protection T/R switch product line, engineered specifically for ultrasound and NDT signal chains where passive, fast, and self-contained transmit/receive isolation is essential.

FAQ

What is the primary function of the MD0100DK6-G in an ultrasound system?

The MD0100DK6-G serves as a dual-channel, self-powered transmit/receive (T/R) switch that protects low-noise receiver inputs from high-voltage transmit pulses. In ultrasound systems, it automatically blocks ±100 V pulses while allowing weak echo signals to pass with minimal distortion-ensuring signal integrity without external control. Its 15 Ω on-resistance and 21 pF on-capacitance preserve bandwidth and SNR in the MD0100DK6-G signal path.

Does the MD0100DK6-G require an external power supply or control signal to operate?

No, the MD0100DK6-G operates entirely self-powered with no external supply or control input needed. Its internal circuitry senses the voltage difference between terminals A and B, turning off when |V_A–B| exceeds ±2 V and turning back on when voltage drops within that threshold. This autonomous behavior makes the MD0100DK6-G ideal for compact, low-power, and timing-critical applications like portable ultrasound probes.

How does the MD0100DK6-G handle bidirectional signal flow?

The MD0100DK6-G supports fully bidirectional operation: terminals A and B are interchangeable per channel, and the device responds identically to positive or negative overvoltage transients. When |V_A–B| > ±2 V, it blocks current in both directions while maintaining ±200 µA leakage for voltage sensing. This symmetry ensures consistent protection whether the transmitter is connected to A or B-simplifying design and layout for the MD0100DK6-G.

What thermal considerations apply to the MD0100DK6-G in continuous operation?

The MD0100DK6-G has a junction-to-ambient thermal resistance (θ_JA) of 44°C/W when mounted on a 4-inch × 4.5-inch JEDEC 2s2p PCB. Its maximum junction temperature is +125°C, and power dissipation is rated at 1.67 W per die. To maintain reliability, the exposed thermal pads (pins 5–8 and heat slugs) must be soldered to a solid copper ground plane. Proper thermal design ensures the MD0100DK6-G sustains repeated high-voltage switching without derating.

Can the MD0100DK6-G replace discrete diode-based T/R protection circuits?

Yes-the MD0100DK6-G replaces complex discrete solutions involving back-to-back diodes, resistors, and RC networks. Unlike diode clamps, the MD0100DK6-G provides controlled, low-leakage blocking above ±2 V with nanosecond response, eliminating forward voltage drop, reverse recovery delays, and parasitic capacitance variability. It simplifies bill-of-materials and improves repeatability in production, especially where tight timing margins exist in the MD0100DK6-G application.