ADI ADUCM330WDCPZ

The ADuCM330/ADuCM331 are fully integrated, 8 kSPS, data acquisition systems that incorporate dual, high performance multichannel sigma-delta (Σ-Δ) ADCs, a 32-bit ARM Cortex-M3 processor, and flash. The ADuCM330 has 96 kB program flash and the ADuCM331 has 128 kB program flash. Both devices have 4 kB data flash. The ADuCM330/ADuCM331 are complete system solutions for battery monitoring in 12 V automotive applications. The ADuCM330/ADuCM331 integrate 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 devices are 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 devices operate 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 devices also contain 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 ADuCM330/ADuCM331 integrate 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 ADuCM330/ADuCM331 are 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 devices can also be configured in a number of low power operating modes under direct program control, consuming < 100 μA. The ADuCM330/ADuCM331 also include a LIN physical interface for single wire, high voltage communications in automotive environments. The devices operate from an external 3.6 V to 18 V (on VDD, Pin 26) voltage supply and is specified over the -40℃ to +115℃ temperature range, with additional typical specifications at +115℃ to +125℃.

• High precision analog-to-digital converters (ADCs)
• Dual channel, simultaneous sampling I-ADC 20-bit Σ-Δ (minimizes range switching) VADC/TADC 20-bit Σ-Δ
• Programmable ADC conversion rate from 1 Hz to 8 kHz
• On-chip ±5 ppm/℃ voltage reference
• Current channel 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
• Voltage channel Buffered, on-chip attenuator for 12 V battery input
• Temperature channel External and on-chip temperature sensor options
• 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 local interconnect networ (LIN) transceiver LIN 2.2-compatible slave, 100 kb fast download option SAE J-2602-compatible slave Low electromagnetic emissions (EME) High electromagnetic immunity (EMI)