Integrated, Precision Battery Sensor for

Automotive Systems

Data Sheet

ADuCM330WFS/ADuCM331WFS

Rev. A

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FEATURES

High precision ADCs

Dual-channel, simultaneous sampling

IADC 20-bit Σ-Δ (minimizes range switching)

VADC/TADC 20-bit Σ-Δ

Programmable ADC conversion rate from 4 Hz to 8 kHz

On-chip ±5 ppm/°C 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 (high

precision)

Serial wire debug (SWD) port supporting code download

and debug

Automotive qualified integrated LIN transceiver

LIN 2.2-compatible slave, 100 kbaud fast download option

SAE J2602-compatible slave

Low electromagnetic emissions

High electromagnetic immunity

Memory

96 kB programmable Flash/EE memory (ADuCM330WFS),

ECC

128 kB programmable Flash/EE memory (ADuCM331WFS),

ECC

10 kB SRAM, ECC

4 kB data Flash/EE memory, ECC

10,000 cycle Flash/EE endurance

20 year Flash/EE retention

In circuit download via SWD and LIN

On-chip peripherals

SPI

GPIO port

General-purpose timer

Wake-up timer

Watchdog timer

On-chip, power-on reset

Power

Operates directly from 12 V battery supply

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 for 115°C to 125°C

AEC-Q100 qualified for automotive applications

Developed for use in ISO 26262 applications for ASIL

Capability A

APPLICATIONS

Battery sensing and management for automotive and light

mobility vehicles

Lead acid battery measurement for power supplies in

industrial and medical domains