Integrated Precision Battery Sensor
for Automotive
ADuC7036
Memory
FEATURES
96 kB Flash/EE memory, 6 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-Δ ADCs
Programmable ADC throughput from 1 Hz to 8 kHz
On-chip ±± ppm/°C voltage reference
Current channel
SAEJ2602/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 and 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
Fully differential, buffered input
Programmable gain from 1 to ±12
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
Package and temperature range
48-lead, 7 mm × 7 mm LFCSP
Fully specified for −40°C to +11±°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
ADuC7036
PRECISION ANALOG ACQUISITION
RESET
IIN+
IIN–
16-BIT
Σ-∆ ADC
2.6V LDO
PSM
POR
MEMORY
98kB FLASH
6kB RAM
PGA
BUF
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
WU
STI
GPIO PORT
UART PORT
SPI PORT
LIN
3× TIMERS
WDT
WU TIMER
TEMPERATURE
SENSOR
PRECISION
REFERENCE
VREF
LIN/BSD
GND_SW
Figure 1.
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registeredtrademarks arethe property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ©2008–2011 Analog Devices, Inc. All rights reserved.