Monolithic Power Systems Inc. EVQ8112A-J-00A

Overview

EVQ8112A-J-00A from Monolithic Power Systems is a fully assembled and tested evaluation board for the MPQ8112A unipolar high-side current-sense amplifier, supporting 2.7V–60V supply, 0V–60V common-mode input, 700kHz bandwidth, ±1% gain accuracy, and AEC-Q100 Grade 1 qualification for automotive ADAS and EPS systems.

For engineers reviewing the EVQ8112A-J-00A datasheet, EVQ8112A-J-00A pinout, EVQ8112A-J-00A application, or EVQ8112A-J-00A equivalent, this board enables rapid validation of high-voltage, high-accuracy current sensing with configurable gain (10 V/V to 100 V/V), low 300µA quiescent current, and operation across –55°C to +155°C ambient.

Technical Context

The EVQ8112A-J-00A implements a test-ready platform for the MPQ8112A IC, which uses a transconductance architecture to convert differential sense voltage (0–200 mV) into a proportional output current, then reconverted to voltage via external R3. Gain is set by R3/R1 ratio multiplied by fixed 5 A/A transconductance.

It supports two operating modes: VCC = VCM (JP1 shorted) and VCC > VCM with VCM = 0 V (JP2 shorted), enabling evaluation under realistic high-side sensing conditions in battery management and motor control circuits where ground-referenced measurement is unsafe or impractical.

Key Specifications

Availability

EVQ8112A-J-00A is available at Aetrix Electronics and suitable for advanced driver assistance systems (ADAS), electric power steering (EPS), and electronic stability control (ESC) requiring stable component supply, pre-validated reference designs, and automotive-grade qualification support.

Supply support for EVQ8112A-J-00A 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

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management ICs, with core expertise in DC/DC converters, LED drivers, and precision analog products for automotive, industrial, and computing markets.

The EVQ8112A-J-00A belongs to MPS's automotive-qualified evaluation board portfolio, designed specifically to accelerate development of AEC-Q100-compliant current-sensing subsystems using their MPQ8112A high-side amplifier IC.

FAQ

What is the primary function of the EVQ8112A-J-00A evaluation board?

The EVQ8112A-J-00A is a ready-to-use hardware platform for evaluating the MPQ8112A high-side current-sense amplifier. It provides accessible test points, configurable jumpers (JP1/JP2), and pre-populated components-including 100 mΩ shunt, gain-setting resistors, and decoupling capacitors-to validate performance under real-world VCM and VCC conditions up to 60 V.

How do I configure the board for VCC = VCM operation?

To configure for VCC = VCM mode, short jumper JP1 and leave JP2 open. Connect VCC and RG1 to the same high-voltage rail, ensuring the sense resistor (RSENSE) is placed between the load and high-side rail. This configuration replicates typical high-side sensing in battery monitoring or motor phase current measurement.

What gain options are supported, and how are they set?

The board supports four discrete gains: 10 V/V, 25 V/V, 50 V/V, and 100 V/V. These are set by populating specific resistor values per Table 1-e.g., R1 = 1 kΩ and R3 = 10 kΩ yields 50 V/V gain. R1 and R3 positions are marked on the silkscreen, and default populate values match the 50 V/V configuration.

Does the board include thermal or environmental stress validation data?

Yes-the board's test report includes total output error vs. VSENSE curves at –55°C, +25°C, and +155°C, confirming stable performance across the full AEC-Q100 Grade 1 temperature range. Gain vs. frequency (up to 10 MHz) and transient response (1 µs/div) plots are also provided in the Rev. 1.0 documentation.

Can the EVQ8112A-J-00A be used with non-automotive applications?

Yes-while qualified to AEC-Q100 Grade 1, the board's 2.7–60 V supply range, 700 kHz bandwidth, and low 300 µA quiescent current make it equally suitable for industrial motor drives, energy metering, and telecom power systems where high common-mode rejection and precision current sensing are required.

Is the MPQ8112A IC itself included on the board?

Yes-the board is populated with the MPQ8112AGJ variant of the IC in a TSOT23-6L package. The IC is fully soldered, tested, and functional out-of-box. The Bill of Materials (page 5) explicitly lists U1 as "MPQ8112A Current-sense amplifier TSOT23-6L" with manufacturer P/N MPQ8112AGJ.