參數(shù)資料
型號: AD7788ARM
廠商: ANALOG DEVICES INC
元件分類: ADC
英文描述: Low Power, 16-/24-Bit Sigma-Delta ADC
中文描述: 1-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO10
封裝: MO-187BA, MSOP-10
文件頁數(shù): 4/20頁
文件大?。?/td> 288K
代理商: AD7788ARM
AD7788/AD7789
AD7788—SPECIFICATIONS
1
Table 2. (V
DD
= 2.5 V to 5.25 V (B Grade); V
DD
= 2.7 V to 5.25 V (A Grade); REFIN(+) = 2.5 V; REFIN(–) = GND; GND = 0 V;
all specifications T
MIN
to T
MAX
, unless otherwise noted.)
Parameter
AD7788A, B
Unit
ADC CHANNEL SPECIFICATION
Output Update Rate
16.6
Hz nom
ADC CHANNEL
No Missing Codes
2
16
Bits min
Resolution
16
Bits p-p
Output Noise
1.5
μV rms typ
Integral Nonlinearity
±15
ppm of FSR max
±50
ppm of FSR max
Offset Error
±3
μV typ
Offset Error Drift vs. Temperature
±10
nV/°C typ
Full-Scale Error
3
±10
μV typ
Gain Drift vs. Temperature
±0.5
ppm/°C typ
Power Supply Rejection
90
dB min
90
dB typ
ANALOG INPUTS
Differential Input Voltage Ranges
±REFIN
V nom
Absolute AIN Voltage Limits
2
GND – 30 mV
V min
V
DD
+ 30 mV
V max
Analog Input Current
Average Input Current
2
±400
nA/V typ
Average Input Current Drift
±50
pA/V/°C typ
Normal Mode Rejection
2
@ 50 Hz, 60 Hz
65
dB min
60
dB min
Common Mode Rejection
@ DC
90
dB min
90
dB typ
@ 50 Hz, 60 Hz
2
100
dB min
100
dB typ
REFERENCE INPUT
REFIN Voltage
2.5
V nom
Reference Voltage Range
2
0.1
V min
V
DD
V max
Absolute REFIN Voltage Limits
2
GND – 30 mV
V min
V
DD
+ 30 mV
V max
Average Reference Input Current
0.5
μA/V typ
Average Reference Input Current Drift
±0.03
nA/V/°C typ
Normal Mode Rejection
2
@ 50 Hz, 60 Hz
65
dB min
60
dB min
Common Mode Rejection
@ DC
100
dB typ
@ 50 Hz, 60 Hz
110
dB typ
Rev. 0 | Page 4 of 20
Test Conditions/Comments
B Grade
A Grade
B Grade
A Grade
REFIN = REFIN(+) – REFIN(–)
Input current varies with input voltage.
B Grade, 50 ± 1 Hz, 60 ± 1 Hz
A Grade, 50 ± 1 Hz, 60 ± 1 Hz
AIN = 1 V
B Grade, 100 dB typ
A Grade
B Grade, 50 ± 1 Hz, 60 ± 1 Hz
A Grade, 50 ± 1 Hz, 60 ± 1 Hz
REFIN = REFIN(+) – REFIN(–)
B Grade, 50 ± 1 Hz, 60 ± 1 Hz
A Grade
AIN = 1 V
50 ± 1 Hz, 60 ± 1 Hz
1
Temperature Range: B Grade, –40°C to +105°C; A Grade, –40°C to +85°C.
2
Specification is not production tested but is supported by characterization data at initial product release.
3
Full-scale error applies to both positive and negative full scale and applies at the factory calibration conditions (V
DD
= 4 V).
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