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ADUC7036 Schematic ( PDF Datasheet ) - ANALOG DEVICES

Teilenummer ADUC7036
Beschreibung Integrated Precision Battery Sensor
Hersteller ANALOG DEVICES
Logo ANALOG DEVICES Logo 




Gesamt 70 Seiten
ADUC7036 Datasheet, Funktion
Integrated Precision Battery Sensor
for Automotive
ADuC7036
FEATURES
High precision ADCs
Dual channel, simultaneous sampling, 16-bit, Σ-Δ 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
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
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
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
GND_SW
PRECISION ANALOG ACQUISITION
BUF PGA
16-BIT
Σ-ADC
RESULT
DIGITAL
ACCUMULATOR COMPARATOR
MUX BUF
16-BIT
Σ-ADC
TEMPERATURE
SENSOR
PRECISION
REFERENCE
ADuC7036
2.6V LDO
PSM
POR
MEMORY
98kB FLASH
6kB RAM
ARM7TDMI
MCU
20MHz
PRECISION
OSC
LOW POWER
OSC
ON-CHIP PLL
3× TIMERS
WDT
WU TIMER
GPIO PORT
UART PORT
SPI PORT
LIN
RESET
XTAL1
XTAL2
WU
STI
LIN/BSD
Figure 1.
Rev. C
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Fax: 781.461.3113 ©2008–2011 Analog Devices, Inc. All rights reserved.
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ADUC7036 Datasheet, Funktion
ADuC7036
Parameter Test
VOLTAGE REFERENCE
ADC Precision Reference
Internal VREF
Power-Up Time1
Initial Accuracy1
Temperature Coefficient1, 21
Reference Long-Term Stability22
External Reference Input Range23
VREF Divide-by-2 Initial Error1
ADC Low Power Reference
Internal VREF
Initial Accuracy
Initial Accuracy1
Temperature Coefficient1, 21
ADC DIAGNOSTICS
VREF/1361
Voltage Attenuator Current
Source1
RESISTIVE ATTENUATOR
Divider Ratio
Resistor Mismatch Drift
ADC GROUND SWITCH
Resistance
Resistance1
Input Current
TEMPERATURE SENSOR24
Accuracy
POWER-ON RESET (POR)
POR Trip Level
POR Hysteresis
Reset Timeout from POR
LOW VOLTAGE FLAG (LVF)
LVF Level
POWER SUPPLY MONITOR (PSM)
PSM Trip Level
WATCHDOG TIMER (WDT)
Timeout Period1
Timeout Step Size
FLASH/EE MEMORY1
Endurance25
Data Retention26
DIGITAL INPUTS
Input Leakage Current
Input Pull-Up Current
Input Capacitance
Input Leakage Current
Input Pull-Down Current
Conditions/Comments
Min
Measured at TA = 25°C
−0.15
−20
0.1
Measured at TA = 25°C
Using ADCREF, measured at TA = 25°C
−5
−300
At any gain settings
Differential voltage increase on the attenuator
when the current source is on, temperature range =
−40°C to +85°C
8.5
3.1
Direct path to ground
20 kΩ resistor selected
Allowed contunious current through the switch
with direct path to ground
After user calibration
MCU in power-down or standby mode
MCU in power-down or standby mode,
temperature range = −25°C to +65°C
Refers to voltage at VDD pin
10
2.85
Refers to voltage at VDD pin
Refers to voltage at VDD pin
32.768 kHz clock, 256 prescale
All digital inputs except NTRST
Input high = REG_DVDD
Input low = 0 V
NTRST only: input low = 0 V
NTRST only: input high = REG_DVDD
1.9
0.008
10,000
20
−80
30
Typ
1.2
0.5
±5
100
0.1
1.2
0.1
±150
24
3
10
20
±3
±2
3
300
20
2.1
6
7.8
±1
−20
10
±1
55
Max
+0.15
+20
1.3
0.3
+5
+300
9.4
3.8
30
6
3.15
2.3
512
±10
−10
±10
100
Unit
V
ms
%
ppm/°C
ppm/1000 hr
V
%
V
%
%
ppm/°C
mV
V
ppm/°C
Ω
mA
°C
°C
V
mV
ms
V
V
sec
ms
Cycles
Years
μA
μA
pF
μA
μA
Rev. C | Page 6 of 132

6 Page









ADUC7036 pdf, datenblatt
ADuC7036
Table 4. SPI Slave Mode Timing—Phase Mode = 1
Parameter Description
tSS SS to SCLK edge
tSL SCLK low pulse width1
tSH SCLK high pulse width1
tDAV Data output valid after SCLK edge2
tDSU Data input setup time before SCLK edge
tDHD Data input hold time after SCLK edge2
tDF Data output fall time
tDR Data output rise time
tSR SCLK rise time
tSF SCLK fall time
tSFS SS high after SCLK edge
Min Typ
0.5 tSL
(SPIDIV + 1) × tHCLK
(SPIDIV + 1) × tHCLK
0
4 × tUCLK
3.5
3.5
3.5
3.5
0.5 tSL
1 tHCLK depends on the clock divider (CD) bits in the POWCON MMR. tHCLK = tUCLK/2CD.
2 tUCLK = 48.8 ns. It corresponds to the 20.48 MHz internal clock from the PLL before the clock divider.
Max
(3 × tUCLK) + (2 × tHCLK)
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
SS
SCLK
(POLARITY = 0)
SCLK
(POLARITY = 1)
MISO
tSS
tSH
tSL
tDAV
tDF
MSB
tSR
tDR
BITS[6:1]
tSFS
tSF
LSB
MOSI
MSB IN
BITS[6:1]
tDSU tDHD
Figure 4. SPI Slave Mode Timing—Phase Mode = 1
LSB IN
Rev. C | Page 12 of 132

12 Page





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