TMAG5123EVM
TMAG5123EVM
This user’s guide describes the characteristics, operation, and use of the TMAG5123 high-precision, in-plane switch evaluation module (EVM). This EVM is designed to evaluate the performance of the TMAG5123. This document includes a schematic, printed-circuit board (PCB) layouts, and a complete bill of materials (BOM).
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1 Overview
The TMAG5123 is a family of high-precision, wide input voltage, in-plane Hall effect sensors designed for system challenges where higher magnetic precision is needed for more flexibility in design. The TMAG5123 evaluation module is populated with a Sensata 499-P36-20 test socket, which allows for convenient testing of all variants of the TMAG5123 family. Each device variant exhibits a different magnetic sensitivity, allowing utility for distance measurement in application. When the applied magnetic flux density exceeds the magnetic operating point (BOP) threshold, the device output drives into low voltage state. When the magnetic flux density returns to a value below the magnetic release point (BRP), the device output returns itself to a high voltage state. The TMAG5123EVM comes prepopulated with a TMAG5123B1 variant for out of the box evaluation. Additional variants can be sampled from www.ti.com. Table 1 lists the different device variants available.
Table 1. Device Variants
| DEVICE | BOP SENSITIVITY (MIN) | BOP SENSITIVITY (MAX) |
|---|---|---|
| TMAG5123A1 | 1 mT | 3 mT |
| TMAG5123B1 | 2.5 mT | 4.5 mT |
| TMAG5123C1 | 6 mT | 8 mT |
| TMAG5123D1 | 9 mT | 11 mT |
The device operates from a VCC range of 2.5 V to 38 V, and is available in a standard SOT-23 package.
1.1 TMAG5123EVM Kit Contents
Table 2 lists the contents of the TMAG5123EVM kit. Contact the nearest Texas Instruments Product Information Center if any component is missing. TI highly recommends checking the TMAG5123 family product folder on the TI website at www.ti.com for further information regarding this product.
Table 2. TMAG5123EVM Kit Contents
| ITEM | QUANTITY |
|---|---|
| TMAG5123EVM test board | 1 |
| Handheld magnet (D3X8) | 1 |
| USB-Micro Cable | 1 |
1.2 Related Documentation From Texas Instruments
The following document provides information regarding TI's integrated circuits used in the assembly of the TMAG5123EVM. This user's guide is available from the TI website under literature number SLYU056. Any letter appended to the literature number corresponds to the document revision that is current at the time of the writing of this document. Newer revisions are available from www.ti.com or the Texas Instruments' Literature Response Center at (800) 477-8924 or the Product Information Center at (972) 644-5580. When ordering, identify the document by both title and literature number.
Table 3. Related Documentation
| DOCUMENT | LITERATURE NUMBER |
|---|---|
| TMAG5123 product data sheet | SLYS030 |
2 TMAG5123EVM Hardware
The TMAG5123EVM is a simple-to-use platform for evaluating the main features and performance of the TMAG5123 across a wide voltage range. The EVM provides quick visual feedback to the user in the form of LED indication when the device under test's BOP or BRP thresholds are crossed.
2.1 Features
The layout of the TMAG5123EVM printed-circuit board (PCB) is designed to provide the following features:
- Burn-in test socket and precision 3D printed cradle for precise distance evaluation of in-plane sensors
- Provides LED feedback to the user to quickly determine output state from the TMAG5123
- Conveniently powered from a common micro-USB connector for quick prototyping
