ADuCM300W
Automotive Qualified, Dual-Channel, Precision ADCs with LIN2.2 Slave Interface
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Features
- Two precision 20-bit Σ-Δ ADCs
- Programmable ADC conversion rates from 4 Hz to 8000 Hz
- On-chip precision voltage reference
- Primary ADC
- Differential voltage inputs to a 20-bit Σ-Δ ADC
- Programmable gain (from 4 to 512)
- Digital comparator with accumulator
- ADC absolute input voltage range: −200 mV to +300 mV
- Auxiliary ADC
- Flexible input mux for input channel selection
- Single-ended voltage input (can be interfaced to an external temperature sensor), internal temperature sensor input, or diagnostic supply input
- Microcontroller
- Arm Cortex-M3 32-bit processor
- 16.384 MHz precision oscillator with 1% accuracy
- Serial wire download (SWD) port supporting code download and debug
- Automotive qualified integrated LIN transceiver
- LIN 2.2-compatible slave
- SAE J-2602-compatible slave
- Low electromagnetic emissions (EME)
- High electromagnetic immunity (EMI)
- Memory
- 128 kB Flash/EE memory, ECC
- 6 kB SRAM, ECC
- 4 kB data Flash/EE memory, ECC
- 10,000 cycle Flash/EE endurance
- 20-year Flash/EE data retention
- In circuit download via SWD and LIN
- On-chip peripherals: SPI, GPIO port, general-purpose timer, wake-up timer, watchdog timer, and on-chip POR
- Power
- Operates directly from an external voltage supply, varying from 3.6 V to 18 V
- Power consumption, 8 mA typical (16 MHz) at TA = −40°C to +115°C
- Low power monitor mode
- Package and temperature range
- 6 mm × 6 mm, 32-lead LFCSP
- Fully specified for −40°C to +115°C operation, additional specifications are available for +115°C to +125°C operation
- AEC-Q100 qualified for automotive applications
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The ADuCM300 is a fully integrated, 8 kSPS (8000 Hz conversion rate) data acquisition system that incorporates dual, high performance, Σ-Δ analog-to-digital converters (ADCs), a 32-bit Arm® Cortex®-M3 processor, and microcontroller unit (MCU) subsystem. The ADuCM300 has a 128 kB program Flash/EE, 4 kB data Flash/EE, and 6 kB static random access memory (SRAM).
The ADuCM300 is a complete system solution for external precision sensor voltage measurements in automotive applications. Minimizing external system components, the device can be powered directly from an external voltage supply that varies from 3.6 V to 18 V. On-chip, low dropout (LDO) regulators generate the supply voltages for the integrated digital and analog subsystems.
The analog subsystem consists of two 20-bit Σ-Δ ADCs: a primary ADC and an auxiliary ADC. The primary ADC accepts a differential input and is ideally suited to interface external sensors with low level signal amplitude outputs integrating a low noise, programmable gain amplifier (PGA), and precision, low drift reference. The auxiliary ADC is connected to a flexible input multiplexer and can measure external single-ended sensor input voltages (AIN5/GND_SW), the internal (on-chip) temperature sensor, or monitor the supply voltage connected to AIN4 (see Figure 1 on the datasheet).
The ADuCM300 operates from an on-chip, 16.384 MHz, high frequency oscillator that supplies the system clock. This clock is routed through a programmable clock divider from which the core clock operating frequency is generated. The device also contains a 32 kHz oscillator for low power operation.
The ADuCM300 integrates a range of on-chip peripherals that can be configured under core software control as required in the application. These peripherals include a serial peripheral interface (SPI) input/output communication controller, six general-purpose input/output (GPIO) pins, one general-purpose timer, a wake-up timer (WUT), and a watchdog timer (WDT).
The ADuCM300 operates in battery-powered applications where low power operation is critical. The microcontroller core can be configured in normal operating mode, resulting in an overall system current consumption of <18.5 mA when all peripherals are active. The device can also be configured in a number of low power operating modes under direct program control, consuming <100 µA. The ADuCM300 includes a local interconnect network (LIN) physical interface for single wire, high voltage communications in automotive environments.
The device operates from an external 3.6 V to 18 V (on VDD, Pin 26) voltage supply and is specified over the −40°C to +115°C temperature range, with additional specifications available for the +115°C to +125°C temperature range.
For more information and register details, see the ADuCM300 Hardware Reference Manual.
Applications
- LIN sensor interface for automotive applications
- General powertrain, body and chassis sensing
- Current and voltage sensing for industrial applications
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ADuCM300W
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Software & Part Ecosystem
Evaluation Kits 1
EVAL-ADuCM300
ADuCM300 Evaluation Board
Product Detail
The ADuCM300 is a fully integrated, 8 kSPS, data acquisition system that incorporates dual, high performance, multichannel, Σ-Δ analog-to-digital converters (ADCs), a 32-bit Arm® Cortex®-M3 processor, and flash memory. The ADuCM300 has a 128 kB program flash, 4 kB data flash, and 6 kB static random access memory (SRAM).
The ADuCM300 is fully qualified for general automotive sensing applications and can interface to multiple external precision sensors in a system solution that also integrates a programmable Cortex-M3 microcontroller to postprocess the sensor signals on-chip, before transmitting the results off chip via industry-standard wired interfaces.
The ADuCM300 integrates all of the required features to precisely and intelligently interface, monitor, process, and diagnose a precision sensing system over a wide range of operating conditions.
The EVAL-ADUCM300QSPZ development system supports the ADuCM300 and allows a flexible platform for evaluation of the ADuCM300 silicon. The evaluation board allows quick removal and insertion of a device via a 32-lead lead frame chip scale package (LFCSP) socket and provides the connections necessary to allow rapid measurement setups. Switches and LEDs are provided on the evaluation board to assist in debugging and simple code development. Sample code projects are also provided to illustrate key features of each peripheral and examples of how these peripherals can be configured.
This user guide provides step-by-step details of how to set up and configure the example software, available from the Tools & Simulations section of the ADuCM300 product page.
By working through this user guide, users can start to generate and download their own user code for use in their own, unique end-system requirements.
For full details, see the ADuCM300 data sheet, which must be consulted in conjunction with this user guide when working with the evaluation board.
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