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参数资料
型号： ADUC845BCPZ8-3
厂商： ANALOG DEVICES INC
元件分类： 微控制器/微处理器
英文描述： 8-BIT, FLASH, 12.58 MHz, MICROCONTROLLER, QCC56
封装： 8 X 8 MM, LEAD FREE, MO-220-VLLD-2, LFCSP-56
文件页数： 43/108页
文件大小： 1940K
代理商： ADUC845BCPZ8-3
ADuC845/ADuC847/ADuC848
Rev. B | Page 4 of 108
SPECIFICATIONS1
AVDD = 2.7 V to 3.6 V or 4.75 V to 5.25 V, DVDD = 2.7 V to 3.6 V or 4.75 V to 5.25 V, REFIN(+) = 2.5 V, REFIN(–) = AGND; AGND =
DGND = 0 V; XTAL1/XTAL2 = 32.768 kHz crystal; all specifications TMIN to TMAX, unless otherwise noted. Input buffer on for primary
ADC, unless otherwise noted. Core speed = 1.57 MHz (default CD = 3), unless otherwise noted.
Table 1.
Parameter
Min
Typ
Max
Unit
Conditions
PRIMARY ADC
Conversion Rate
5.4
105
Hz
Chop on (ADCMODE.3 = 0)
16.06
1365
Hz
Chop off (ADCMODE.3 = 1)
No Missing Codes2
24
Bits
≤26.7 Hz update rate with chop enabled
24
Bits
≤80.3 Hz update rate with chop disabled
Resolution (ADuC845/ADuC847)
See Table 11 and Table 15
Resolution (ADuC848)
See Table 13 and Table 17
Output Noise (ADuC845/ADuC847)
See Table 10 and Table 14
V (rms)
Output noise varies with selected update rates,
gain range, and chop status.
Output Noise (ADuC848)
See Table 12 and Table 16
V (rms)
Output noise varies with selected update rates,
gain range, and chop status.
Integral Nonlinearity
±15
ppm of FSR
1 LSB16
Offset Error3
±3
V
Chop on
Chop off, offset error is in the order of the noise
for the programmed gain and update rate
following a calibration.
Offset Error Drift vs. Temperature2
±10
nV/°C
Chop on (ADCMODE.3 = 0)
±200
nV/°C
Chop off (ADCMODE.3 = 1)
Full-Scale Error4
ADuC845/ADuC847
±10
V
±20 mV to ±2.56 V
ADuC848
±10
V
±20 mV to ±640 mV
±0.5
LSB16
±1.28 V to ±2.56 V
Gain Error Drift vs. Temperature4
±0.5
ppm/°C
Power Supply Rejection
80
dB
AIN = 1 V, ±2.56 V, chop enabled
113
dB
AIN = 7.8 mV, ±20 mV, chop enabled
80
dB
AIN = 1 V, ±2.56 V, chop disabled2
PRIMARY ADC ANALOG INPUTS
Differential Input Voltage Ranges ,5 6
Gain = 1 to 128
Bipolar Mode (ADC0CON1.5 = 0)
±1.024 ×
VREF/GAIN
V
VREF = REFIN(+) REFIN() or
REFIN2(+) REFIN2() (or Int 1.25 VREF)
Unipolar Mode (ADC0CON1.5 = 1)
0 – 1.024 ×
VREF/GAIN
V
VREF = REFIN(+) REFIN() or
REFIN2(+) REFIN2() (or Int 1.25 VREF)
ADC Range Matching
±2
V
AIN = 18 mV, chop enabled
Common-Mode Rejection DC
Chop enabled, chop disabled
On AIN
95
dB
AIN = 7.8 mV, range = ±20 mV
113
dB
AIN = 1 V, range = ±2.56 V
Common-Mode Rejection
50 Hz/60 Hz2
50 Hz/60 Hz ± 1 Hz, 16.6 Hz and 50 Hz update
rate, chop enabled, REJ60 enabled
On AIN
95
dB
AIN = 7.8 mV, range = ±20 mV
90
dB
AIN = 1 V, range = ±2.56 V
Footnotes at end of table.
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