LT9890

• Fully featured evaluation board for the LT9890
• Response bandwidth greater than 1 MHz
• Compatible with Intel VR14 Psys systems

The EVAL-LT9890-A1Z showcases the LT9890 high-precision current monitor with internal current-sense element supporting up to 150 A of load current. The LT9890 IOUT pin outputs a monitor current with 26600:1 ratio to the pass current flowing through IP to IM pins. The IOUT monitor current flows through an external ground referenced 200 Ω || 100 pF network (~8 MHz low-pass filter) to the P4 (1×2, 100 mil) and J1 (SMA) headers for convenient measurement. The LT9890 current sense element is factory calibrated to 1% of the total unadjusted error and has a zero-temperature coefficient architecture. The IOUT current monitor has a response bandwidth greater than 1 MHz, providing a fast and accurate ground-referenced output signal insensitive to ground voltage variations. Minimal power loss is achieved through a low, 150 μΩ current path resistance and an aspect ratio conducive to wide printed circuit board (PCB) traces. In addition, the LT9890 is compatible with Intel VR14 Psys systems. The key performance characteristics of the EVAL-LT9890-A1Z are shown in the Performance Summary.

Design files for the EVAL-LT9890-A1Z are available on the EVALLT9890 evaluation board page.

For full details on the LT9890, see the LT9890 data sheet, which should be consulted in conjunction with this user guide when using the EVAL-LT9890-A1Z evaluation board.