ADUC7032-8L_15 Datasheet, PDF (1/120 Pages) Analog Devices – Integrated Precision Battery Sensor for Automotive System

Integrated Precision Battery Sensor
for Automotive System
ADuC7032-8L
FEATURES
High precision analog-to-digital converters (ADCs)
Dual channel, simultaneous sampling, 16-bit Σ-Δ ADCs
Third independent ADC for temperature sensing
Programmable ADC throughput from 1 Hz to 8 kHz
On-chip 5 ppm/°C voltage reference
Current channel
Fully differential, buffered input
Programmable gain: 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
96 kB Flash/EE memory, 6 kB SRAM
10k-cycle Flash/EE endurance, 20-year Flash/EE retention
In-circuit download via JTAG and LIN
64 × 16-bit result FIFO for current and voltage ADC
On-chip peripherals
LIN 1.3- and 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, 2× 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: 175 μA
Package and temperature range
48-lead, 7 mm × 7 mm LQFP
Fully specified for −40°C to +105°C operation
APPLICATIONS
Battery sensing/management for automotive systems
FUNCTIONAL BLOCK DIAGRAM
IIN+
IIN–
VBAT
VTEMP
GND_SW
VREF
PRECISION ANALOG ACQUISITION
PGA
16-BIT
Σ-∆ ADC
RESULT
DIGITAL
ACCUMULATOR COMPARATOR
BUF
16-BIT
Σ-∆ ADC
MUX BUF
16-BIT
Σ-∆ ADC
TEMPERATURE PRECISION
SENSOR
REFERENCE
TCK TDI TDO NTRST TMS
ADuC7032-8L
2.6V LDO
PSM
POR
MEMORY
96kB FLASH
6kB SRAM
128B ADC FIFO
RESET
ARM7TDMI^®
MCU
20MHz
PRECISION
OSC (1%)
LOW POWER
OSC
ON-CHIP PLL
XTAL1
XTAL2
2× TIMERS
WDT
W/U TIMER
GPIO PORT
UART PORT
SPI PORT
LIN
WU
LIN
Figure 1.
Rev. A
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