Data Sheet

ADuCM330/ADuCM331

Rev. C | Page 3 of 16

GENERAL DESCRIPTION

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 con-

sumption 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°C to +115°C

temperature range, with additional typical specifications at +115°C

to +125°C.

The information in this data sheet is relevant for silicon

Revisions L6x, where x represents a number between 0 and 9.

For more information and register details for the ADuCM330/

ADuCM331, see the user guide ADuCM330/ADuCM331

Hardware Reference Manual, UG-716.