ADUC7039BCP6Z-RL Analog Devices Inc, ADUC7039BCP6Z-RL Datasheet - Page 32

• 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

ADuC7039
ADC GROUND SWITCH
The ADuC7039 features an integrated ground switch pin,
GND_SW, Pin 9. This switch allows the user to dynamically
disconnect ground from external devices and allows a connec-
tion to ground using a 20 kΩ resistor, reducing the number of
external components required for an NTC circuit as shown in
Figure 13. The ground switch feature can be used for reducing
power consumption on application specific boards.
Table 24. Current Channel ADC, Normal Power Mode, Typical Output RMS Noise
ADCFLT
0x961F
0x007F
0x0007
1
Table 25. Voltage Channel ADC, Typical Output RMS Noise (Referred to ADC Voltage Attenuator Input)
ADCFLT
0x961F
0x007F
0x0007
Table 26. Temperature Channel ADC, Typical Output RMS Noise
ADCFLT
0x961F
0x007F
0x0007
The maximum absolute input voltage allowed is −200 mV to +300 mV relative to ground.
Figure 13. Internal Ground Switch Configuration
R
NTC
REF
Data Update Rate
1 kHz
10 Hz
50 Hz
Data Update Rate
10 Hz
50 Hz
1 kHz
Data Update Rate
10 Hz
50 Hz
1 kHz
20kΩ
REG_AVDD
VTEMP
GND_SW
ADCCFG[7]
±2.3 mV
(512)
0.065 μV
0.144 μV
0.663 μV
Rev. B | Page 32 of 92
ADC NOISE PERFORMANCE TABLES
Table 24, Table 25, and Table 26 list the output rms noise in
microvolts for some typical output update rates on the I- and
V/T-ADCs. The numbers are typical and are generated at a
differential input voltage of 0 V (I-ADC), 4V (V-ADC) and 0.1 V
(T-ADC). The output rms noise is specified as the standard
deviation (or 1 Σ) of the distribution of ADC output codes
collected when the ADC input voltage is at a dc voltage. It is
expressed as μV rms.
±37.5 mV
(32)
0.087 μV
0.170 μV
0.780 μV
28.8 V ADC Input Range
65 μV
65 μV
180 μV
0 V to 1.2 V ADC Input Range
2.8
2.8
7.5
ADC Input Range
μV
μV
μV
±300 mV
(4)
0.7 μV
0.7 μV
2.6 μV
1