ADUC7034 Datasheet, PDF (1/142 Pages) Analog Devices – Integrated Precision Battery Sensor for Automotive

Preliminary Technical Data
Integrated Precision Battery Sensor
for Automotive
ADuC7034
FEATURES
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
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
External (32.768 kHz) watch crystal
JTAG port supports code download and debug
Memory
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
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
Package and temperature range
48-lead, 7 mm × 7 mm LFCSP
Fully specified for −40°C to +115°C operation
APPLICATIONS
Battery sensing/management for automotive systems
FUNCTIONAL BLOCK DIAGRAM
IIN+
IIN-
VBAT
VTEMP
VREF+
VREF-
CREF
PRECISION ANALOG ACQUISITION
BUF PGA
16-BIT
Σ−∆ ADC
RESULT
DIGITAL
ACCUMULATOR COMPARATOR
MUX BUF
16-BIT
Σ−∆ ADC
TEMPERATURE
SENSOR
PRECISION
REFERENCE
2.6V LDO
PSM
POR
ARM7TDMI
MCU
20MHz
3XTIMERS
WDT
W/U TIMER
MEMORY
96KB FLASH
6KB RAM
PRECISION
OSC
LOW POWER
OSC
ON-CHIP PLL
GPIO PORT
UART PORT
SPI PORT
LIN
RESET
XTAL1
XTAL2
WU
STI
LIN/BSD
Figure 1.
Rev. Pr.A
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