aduc7030 Analog Devices, Inc., aduc7030 Datasheet - Page 71
![no-image](/images/no-image-200.jpg)
aduc7030
Manufacturer Part Number
aduc7030
Description
Integrated Precision Battery Sensor For Automotive
Manufacturer
Analog Devices, Inc.
Datasheet
1.ADUC7030.pdf
(150 pages)
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Preliminary Technical Data
downloaded into ADC0GN at power-on/reset represents the
scaling factor for a PGA Gain=1. There will be some level of
gain error if this value is used at different PGA settings. User
code can over-write the calibration coefficients or run ADC
calibrations to correct the gain error at the current PGA setting.
In Summary, the simplified ADC transfer function can be
described as:
This equation is valid for Voltage/Temperature channel ADC.
For the Current Channel ADC,
where K is dependent on PGA gain setting and ADC mode.
Normal Mode:
For PGA gains of 1,4,8,16,32 and 64 the K factor is 1. For PGA
gains of 2 and 128 the K factor is 2. For PGA gain of 256 the K
Factor is 4. For PGA gain of 512, the K factor is 8.
Low Power Mode:
The PGA gain is set to 128 and the K factor is 32.
Low Power Plus Mode:
ADCOUT
ADCOUT
ª
« ¬
VIN
VREF
ª
« ¬
VIN
*
PGA
VREF
*
PGA
K
*
ADCOF
ADCOF
º
» ¼
º
» ¼
*
*
ADCGNNOM
ADCGNNOM
ADCGN
ADCGN
Rev. PrE | Page 71 of 150
The PGA gain is set to 512 and the K factor is 8.
In Low-Power and Low-Power-Plus Mode, the K factor doubles
if (REG_AVDD)/2 is used as the reference.
ADC DIAGNOSTICS
The ADuC7030/ADuC7033 features diagnostic capability on
both ADCs.
Current ADC Diagnostics
The ADuC7030/ADuC7033 features the capability to detect
Open Circuit conditions on the application board. This is
accomplished using the two current sources on IIN+ and IIN-,
which is controlled via ADC0CON[14,13].
NOTE: These current sources have a tolerance of +-30%. A
PGA gain equal to or greater than 2 (ADC0CON [3-0 ] ≥ 0001)
must be used when current sources are enabled.
Voltage/Temperature ADC Diagnostics
The ADuC7030/ADuC7033 features the capability to detect
Open Circuit conditions on the Voltage/Temperature Channel
inputs. This is accomplished using the two current sources on
VTEMP+ and GND_SW, which is controlled via
ADC1CON[14,13].
These functions are described in details in the application note
ADC diagnostic on the ADuC703x series.
ADuC7030/ADuC7033
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