ADUC7039 Datasheet, PDF (1/88 Pages) Analog Devices – Integrated, Precision Battery Sensor for Automotive Systems

Integrated, Precision
Battery Sensor for Automotive Systems
ADuC7039
FEATURES
High precision ADC
Dual channel, simultaneous sampling, 16-bit, Σ-Δ ADCs
Programmable ADC throughput from 10 Hz to 1 kHz
On-chip 5 ppm/ºC voltage reference
Current channel
Fully differential, buffered input
Programmable gain
ADC 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
ARM7TDMI-S core, 16-/32-bit RISC architecture
20.48 MHz PLL
On-chip precision oscillator
JTAG port supports code download and debug
Memory
64 kB Flash/EE memory options, 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 2.1-compatible slave
SPI
GPIO port
1 × general-purpose timer
Wake-up and watchdog timers
On-chip power-on-reset
Power
Operates directly from 12 V battery supply
Current consumption 7.5 mA (10 MHz)
Low power monitor mode
Package and temperature range
32-pin, 6 mm × 6 mm LFCSP
Fully specified for −40°C to +115°C operation
APPLICATIONS
Battery sensing/management for automotive systems
IIN+
IIN–
VBAT
VTEMP
GND_SW
FUNCTIONAL BLOCK DIAGRAM
RTCK TCK TDI TDO NTRST TMS
PRECISION ANALOG ACQUISITION
BUF
PGA
16-BIT
Σ-Δ ADC
ADuC7039
LDO
POR
MEMORY
64KB FLASH
4KB RAM
RESET
RESULT
DIGITAL
ACCUMULATOR COMPARATOR
MUX BUF
16-BIT
Σ-Δ ADC
TEMPERATURE PRECISION
SENSOR
REFERENCE
20MHz
ARM7TDMI
MCU
PRECISION
OSC
LOW POWER
OSC
ON-CHIP PLL
1 × TIMER
GPIO PORT
WDT
SPI PORT
LIN
W/U TIMER
LIN
Figure 1.
Rev. 0
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