The ADuCM331 is a fully integrated, 8 kSPS, data acquisition system that incorporates dual, high performance multichannel sigma-delta (Σ-Δ) ADCs, 32-bit ARM® Cortex™-M3 processor and flash. The ADuCM331 has 128 kB program flash. and 4 kB data flash. The ADuCM331 is a complete system solution for battery monitoring in 12 V automotive applications. The ADuCM331 integrates all of the required features to precisely and intelligently monitor, process, and diagnose 12 V battery parameters including battery current, voltage, and temperature over a wide range of operating conditions.
Minimizing external system components, the device is powered directly from a 12 V battery. On-chip, low dropout (LDO) regulators generate the supply voltage for two integrated Σ-Δ ADCs. The ADCs precisely measure battery current, voltage, and temperature to characterize the state of the health and the charge of the car battery.
The device 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 analog subsystem consists of an ADC with a programmable gain amplifier (PGA) that allows the monitoring of various current and voltage ranges. It also includes a precision reference on-chip. The ADuCM331 integrates a range of on-chip peripherals that can be configured under core software control as required in the application. These peripherals include a SPI serial input/output communication controller, six GPIO pins, one general-purpose timer, a wake-up timer, and a watchdog timer. The ADuCM331 is specifically designed to operate 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 ADuCM331 also includes a 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 typical specifications at +125°C.
Features and BenefitsI-ADC 20-bit Σ-Δ (minimizes range switching) VADC//TADC 20-bit Σ-Δ Fully differential, buffered input Programmable gain (from 4 to 512) ADC absolute input range: −200 mV to +300 mV Digital comparator with current accumulator feature Buffered, on-chip attenuator for 12 V battery input External and on-chip temperature sensor options ARM Cortex-M3 32-bit processor 16.384 MHz precision oscillator with 1% accuracy Serial wire download (SWD) port supporting code download and debug LIN 2.2-compatible slave, 100 kb fast download option SAE J-2602 compatible slave Low electromagnetic emissions (EME) High electromagnetic immunity (EMI) | Processors & DSPDesign Tools |
| Document | note |
| ADuCM330/ADuCM331: Integrated, Precision Battery Sensor for Automotive Systems Data Sheet (Rev. C) | PDF 383.16 K |
| ADuCM331: Anomaly Data Sheet (Rev. 0) | PDF 80.99 K |
| Document | note |
| AN-946: Flash/EE Memory Programming via LIN—Protocol 6 (Rev. C) | PDF 129 kB |
| Document | note |
| UG-716: ADuCM330/ADuCM331 Hardware Reference Manual | PDF 1.48 M |
| UG-718: EVAL-ADUCM331QSPZ Development System Getting Started Tutorial | PDF 439.31 K |
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|---|---|---|---|---|---|
| ADUCM331WDCPZ Production | 32 ld LFCSP (6x6x.95mm) w/3.8exposed pad | OTH 490 | -40 to 115C | 5.07 | 4.29 | Y |
| ADUCM331WDCPZ-RL Production | 32 ld LFCSP (6x6x.95mm) w/3.8exposed pad | REEL 2500 | -40 to 115C | 0 | 4.29 | Y |
| Part Number | Description | Price | RoHS |
|---|---|---|---|
| EVAL-ADUCM331QSPZ | Evaluation Board | 105.2 | Y |
