ADUC7036CCPZ-RL Analog Devices Inc, ADUC7036CCPZ-RL Datasheet - Page 44

• Manufacturer Part Number: ADUC7036CCPZ-RL
• Description: Flash 96k ARM7 Dual 16-Bit ADC LIN I.C.
• Manufacturer: Analog Devices Inc
• Series: MicroConverter® ADuC7xxxr

Specifications of ADUC7036CCPZ-RL

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 20.48MHz
• Connectivity: LIN, SPI, UART/USART
• Peripherals: PSM, Temp Sensor, WDT
• Number Of I /o: 9
• Program Memory Size: 96KB (96K x 8)
• Program Memory Type: FLASH
• Eeprom Size: -
• Ram Size: 6K 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: 48-VFQFN Exposed Pad, CSP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

ADuC7036
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 one of three
input sources: an external voltage, an external temperature
sensor circuit, or an on-chip temperature sensor.
As with the current channel ADC (I-ADC), the V-/T-ADC
employs an identical Σ-Δ conversion technique, including
a modified Sinc3 low-pass filter to provide a valid 16-bit data
conversion result at programmable output rates from 4 Hz to
8 kHz. An external RC filter network is not required because
this is internally implemented in the voltage channel.
VTEMP
VBAT
DIVIDE-BY-24 INPUT
DIFFERENTIAL
ATTENUATOR
ATTENUATOR
45Ω
2Ω
1Ω
TEMPERATURE
INTERNAL
BUF
BUF
IMPEDANCE INPUT STAGE
THE BUFFER AMPLIFIERS
FOR THE ANALOG INPUT.
BUFFER AMPLIFIERS
PRESENT A HIGH
REFERENCE IS ROUTED TO
EXTERNAL REFERENCE ON
THE ADC BY DEFAULT. AN
THE VREF PIN CAN ALSO
PRECISION REFERENCE
THE INTERNAL 5ppm/°C
MUX
BE SELECTED.
CHOP
Figure 19. Voltage/Temperature ADC, Top-Level Overview
REFERENCE
PROGRAMMABLE CHOPPING
THROUGH THE CONVERSION
INTERNAL
ALTERNATELY REVERSED
VREF
MODULATOR
THE INPUTS ARE
ANALOG INPUT
Σ-∆
CYCLE.
Σ-∆ ADC
Rev. C | Page 44 of 132
PROGRAMMABLE
QUANTIZATION NOISE INTRODUCED
DIGITAL FILTER
BY THE MODULATOR. THE UPDATE
FILTER ARE PROGRAMMABLE VIA
RATE AND BANDWIDTH OF THIS
SCALED BY THE CALIBRATION
COEFFICIENTS BEFORE BEING
THE SINC3 FILTER REMOVES
THE OUTPUT WORD FROM
THE DIGITAL FILTER IS
CONVERSION RESULT.
PROVIDED AS THE
THE ADCFLT MMR.
OUTPUT SCALING
PROGRAMMABLE
THE DIGITAL FILTER, THE DUTY
CYCLE OF WHICH REPRESENTS
THE MODULATOR PROVIDES A
HIGH FREQUENCY, 1-BIT DATA
WHICH IS ALSO CHOPPED) TO
THE SAMPLED ANALOG INPUT
DIGITAL FILTER
STREAM (THE OUTPUT OF
Σ-∆ MODULATOR
The external battery voltage (VBAT) is routed to the ADC input
via an on-chip, high voltage (divide-by-24), resistive attenuator.
The voltage attenuator buffers are automatically enabled when
the voltage attenuator input is selected.
The battery temperature can be derived through the on-chip
temperature sensor or an external temperature sensor input.
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 disabled.
This ADC is again buffered but, unlike the current channel, has
a fixed input range of 0 V to V
on VBAT (assuming an internal 1.2 V reference). A top-level
overview of this ADC signal chain is shown in Figure 19.
VOLTAGE.
COEFFICIENT
COEFFICIENT
OFFSET
GAIN
CHOP
INTERRUPT AFTER A VOLTAGE
ADC INTERRUPT GENERATOR
CONVERSION IS COMPLETED.
AVERAGE
FORMAT
OUTPUT
RESULT
OUTPUT
ENSURES 16 BITS OF
NO MISSING CODES.
ADC
GENERATES AN ADC
ARCHITECTURE
OR TEMPERATURE
Σ-∆ ADC
THE Σ-∆
INTERRUPT
REF
TO VOLTAGE OR
TEMPERATURE
DATA MMR
ADC
on VTEMP and 0 V to 28.8 V
THE FILTER IS SUMMED AND
AS PART OF THE CHOPPING
DATA-WORD OUTPUT FROM
IMPLEMENTATION, EACH
AVERAGED WITH ITS
OUTPUT AVERAGE
PREDECESSOR.