2 MSPM0L134x MCU Overview

The ultra-low-power MSPM0L134x MCU features a cost-effective, ultra-low power (71µA/MHz), 32MHz Arm Cortex-M0+ CPU, with excellent standby low-power performance (1µA) across full temperature ranges (see Figure 2-1). The MCU can output up to 8 channels of PWM signals in the standby mode and supports multiple protocols such as LIN, IrDA, DALI, Manchester, smart card, SMBus, PMBus, FM+. The 12-bit ADC offers a conversion rate of 1.68MSPS and can achieve an accuracy of 11.2 effective number of bits (ENOB). The MSPM0L1346 device offers one comparator supporting both high-speed mode and low-power mode. The MSPM0L134x MCU is equipped with two operational amplifiers (OPA) that support transimpedance amplifier (TIA) mode, a built-in high-frequency oscillator with 1.2% accuracy across the entire temperature range, two 5V tolerant open-drain I/Os (ODIO), a wide operating voltage range of 1.62V to 3.6V, and a VSSOP28 package size of 7.1mm × 4.9mm. Due to the high integration of the MSPM0L134x MCU series, the design can save multiple discrete components, simplifying system design, optimizing the physical size of the printed circuit board (PCB), and significantly reducing bill of materials (BOM) costs.

Figure 2-1 MSPM0L134x MCU Block Diagram

The integrated low-leakage transimpedance amplifier (TIA) empowers the MSPM0L134x MCU for cost-effective sensing applications. For example, the integrated transimpedance amplifier (TIA) has a more effective capability for detecting current compared to conventional integrated operational amplifiers. Additionally, through the dedicated OPA1_IN0 pin attributes, compared with the 50pA OPA input bias current on MSPM0L130x MCU, the MSPM0L134x MCU transimpedance amplifier (TIA) features industry-leading input bias current which is only 6pA. Here, the designer can check the OPA and TIA electrical characteristics parameter by search the key words "MSPM0L134x devices only" on the MSPM0L130x Mixed-Signal Microcontrollers data sheet. Additionally, the user can check the dedicated OPA1_IN0 pin attributes of the MSPM0L134x MCU by searching the key words “MSPM0L134x only” on the device data sheet. Both MSPM0L134x and MSPM0L130x operational amplifiers (OPA) support low-power modes and rail-to-rail operation, thereby enhancing current detection capabilities and extending the battery life of the system.