ADUC7039BCP6Z-RL Analog Devices Inc, ADUC7039BCP6Z-RL Datasheet - Page 31

• Manufacturer Part Number: ADUC7039BCP6Z-RL
• Description: Flash 64k ARM7 Dual 16-Bit ADC LIN I.C.
• Manufacturer: Analog Devices Inc
• Series: MicroConverter® ADuC7xxxr

Specifications of ADUC7039BCP6Z-RL

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 20.48MHz
• Connectivity: LIN, SPI
• Peripherals: POR, Temp Sensor, WDT
• Number Of I /o: 6
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 3.5 V ~ 18 V
• Data Converters: A/D 2x16b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 115°C
• Package / Case: 32-LFCSP
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption

Voltage/Temperature Channel ADC (V/T-ADC)
The voltage/temperature channel ADC (V/T-ADC) converts
additional battery parameters such as voltage and temperature.
The input to this channel can be multiplexed from an external
voltage and an on-chip temperature sensor.
As with the current channel ADC described previously, the
V/T-ADC employs an identical Σ-Δ conversion technique,
including a modified sinc3 low-pass filter to give a valid
16-bit data conversion result at programmable output rates
from 10 Hz to 1 kHz. An external RC filter network is not
required because this is internally implemented in the
voltage channel.
*R = 66kΩ
VBAT
DIVIDE-BY-24, INPUT
DIFFERENTIAL
ATTENUATOR
ATTENUATOR
44R*
2R*
2R*
VTEMP
REG_AVDD
INTERNAL
ANALOG INPUT
TEMP
DIAGNOSTIC
CURRENT
SOURCES
REG_AVDD
IMPEDANCE INPUT STAGE
THE BUFFER AMPLIFIERS
FOR THE ANALOG INPUT.
MUX
BUFFER AMPLIFIERS
PRESENT A HIGH
PROGRAMMABLE CHOPPING
THROUGH THE CONVERSION
ALTERNATELY REVERSED
BUF
THE INPUTS ARE
ANALOG INPUT
Figure 12. Voltage/Temperature ADC, Top Level Overview
CYCLE.
CHOP
REFERENCE IS ROUTED TO
PRECISION REFERENCE
THE INTERNAL 5ppm/°C
THE ADC BY DEFAULT.
Rev. B | Page 31 of 92
REFERENCE
QUANTIZATION NOISE INTRODUCED
INTERNAL
BY THE MODULATOR. THE UPDATE
THE DIGITAL FILTER, THE DUTY
CYCLE OF WHICH REPRESENTS
FILTER ARE PROGRAMMABLE VIA
THE MODULATOR PROVIDES A
HIGH FREQUENCY 1-BIT DATA
WHICH IS ALSO CHOPPED) TO
THE SAMPLED ANALOG INPUT
RATE AND BANDWIDTH OF THIS
STREAM (THE OUTPUT OF
THE SINC3 FILTER REMOVES
MODULATOR
THE ADC FILTER MMR.
Σ-Δ MODULATOR
PROGRAMMABLE
Σ-Δ
DIGITAL FILTER
VOLTAGE.
The external battery voltage (VBAT) is routed to the ADC input
via an on-chip, high voltage (divide-by-24), resistive attenuator.
This ADC channel, unlike the current channel, has a fixed input
range of 0 V to 28.8 V on VBAT.
The battery temperature can be derived through the on-chip
temperature sensor.
By default, the time to a first valid (fully settled) result after
an input channel switch on the voltage/temperature channel
is three ADC conversion cycles with chop mode turned off.
A top level overview of the ADC signal chain is shown in
Figure 12.
Σ-Δ ADC
PROGRAMMABLE
DIGITAL FILTER
SCALED BY THE CALIBRATION
COEFFICIENTS BEFORE BEING
THE OUTPUT WORD FROM
THE DIGITAL FILTER IS
CONVERSION RESULT.
PROVIDED AS THE
OUTPUT SCALING
NO MISSING CODES.
ENSURES 16 BITS
ARCHITECTURE
Σ-Δ ADC
THE Σ-Δ
COEFFICIENT
COEFFICIENT
FINAL (16-BIT)
ADC RESULT.
ADC RESULT
OFFSET
GAIN
CHOP
THE FILTER IS SUMMED AND
AS PART OF THE CHOPPING
DATA-WORD OUTPUT FROM
IMPLEMENTATION, EACH
AVERAGE
FORMAT
OUTPUT
RESULT
OUTPUT
AVERAGED WITH ITS
ADC
OUTPUT AVERAGE
PREDECESSOR.
ADuC7039