Integrated Precision Battery Sensor
for Automotive
Preliminary Technical Data
ADuC7034
Memory
FEATURES
32-kB Flash/EE memory, 4-kB SRAM
10,000-cycle Flash/EE endurance, 20-year Flash/EE
retention
In-circuit download via JTAG and LIN
On-chip peripherals
High precision ADCs
Dual channel, simultaneous sampling, 16-bit, Σ-∆ ADCs
Programmable ADC throughput from 1 Hz to 8 kHz
On-chip 5 ppm/°C voltage reference
Current channel
Fully differential, buffered input
Programmable gain from 1 to 512
ADC input range: −200 mV to +300 mV
Digital comparators, with current accumulator feature
Voltage channel
Buffered, on-chip attenuator for 12 V battery inputs
Temperature channel
External and on-chip temperature sensor options
Microcontroller
LIN 2.0-compatible (slave) support via UART with
hardware synchronization
Flexible wake-up I/O pin, master/slave SPI® serial I/O
9-pin GPIO port, 3× general-purpose timers
Wake-up and watchdog timers
Power supply monitor, on-chip power-on-reset
Power
Operates directly from 12 V battery supply
Current consumption
Normal mode 10 mA at 10 MHz
Low power monitor mode
ARM7TDMI® core, 16-/32-bit RISC architecture
20.48 MHz PLL with programmable divider
PLL input source
On-chip precision oscillator
On-chip low power oscillator
Package and temperature range
48-lead, 7 mm × 7 mm LFCSP
Fully specified for −40°C to +115°C operation
External (32.768 kHz) watch crystal
JTAG port supports code download and debug
APPLICATIONS
Battery sensing/management for automotive systems
FUNCTIONAL BLOCK DIAGRAM
PRECISION ANALOG ACQUISITION
16-BIT
2.6V LDO
PSM
POR
MEMORY
96KB FLASH
6KB RAM
RESET
IIN+
IIN-
BUF
PGA
Σ−∆ ADC
VBAT
XTAL1
XTAL2
RESULT
ACCUMULATOR
DIGITAL
COMPARATOR
PRECISION
OSC
LOW POWER
OSC
ARM7TDMI
MCU
20MHz
ON-CHIP PLL
16-BIT
Σ−∆ ADC
MUX
BUF
VTEMP
VREF+
WU
STI
GPIO PORT
UART PORT
SPI PORT
LIN
3XTIMERS
WDT
W/U TIMER
TEMPERATURE
SENSOR
PRECISION
REFERENCE
LIN/BSD
VREF-
CREF
Figure 1.
Rev. Pr.A
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