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參數(shù)資料
| 型號： | AD7790 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | ADC |
| 英文描述： | Low Power, 16-Bit Buffered Sigma-Delta ADC |
| 中文描述： | 低功耗，16位緩沖Σ-Δ模數(shù)轉(zhuǎn)換器 |
| 文件頁數(shù)： | 3/20頁 |
| 文件大?。?/td> | 299K |
| 代理商： | AD7790 |
AD7790
AD7790—SPECIFICATIONS
1
Table 1. (V
DD
= 2.5 V to 5.25 V; REFIN(+) = 2.5 V; REFIN(–) = GND; CDIV1 = CDIV0 = 0; GND = 0 V;
all specifications T
MIN
to T
MAX
, unless otherwise noted.)
Parameter
AD7790B
ADC CHANNEL SPECIFICATION
Output Update Rate
9.5
120
ADC CHANNEL
No Missing Codes
2
16
Resolution
16
Output Noise
1.1
Integral Nonlinearity
±15
Offset Error
±3
Offset Error Drift vs. Temperature
±10
Full-Scale Error
3
±10
Gain Drift vs. Temperature
±0.5
Power Supply Rejection
90
ANALOG INPUTS
Differential Input Voltage Ranges
±REFIN/GAIN
Absolute AIN Voltage Limits
2
GND + 100 mV
V
DD
– 100 mV
Analog Input Current
Average Input Current
2
±1
Average Input Current Drift
±5
Absolute AIN Voltage Limits
2
GND – 30 mV
V
DD
+ 30 mV
Analog Input Current
Rev. 0 | Page 3 of 20
Unit
Hz min nom
Hz max nom
Bits min
Bits p-p
μV rms typ
ppm of FSR max
μV typ
nV/°C typ
μV typ
ppm/°C typ
dB min
V nom
V min
V max
nA max
pA/°C typ
V min
V max
Test Conditions/Comments
±V
REF
Range, Update Rate
≤
20 Hz
9.5 Hz Update Rate
3.5 ppm typ
Input Range = ±REFIN, 100 dB typ
REFIN = REFIN(+) – REFIN(–); GAIN = 1, 2, 4, or 8
Buffered Mode of Operation
Buffered Mode of Operation
Unbuffered Mode of Operation
Unbuffered Mode of Operation
Input current varies with input voltage.
73 dB typ, 50 ± 1 Hz, 60 ± 1 Hz, FS[2:0] = 100
4
90 dB typ, 50 ± 1 Hz, FS[2:0] = 101
4
90 dB typ, 60 ± 1 Hz, FS[2:0] = 011
4
Input Range = ±REFIN, AIN = 1 V
100 dB typ (FS[2:0] = 100
4
)
50 ± 1 Hz (FS[2:0] = 101
4
), 60 ± 1 Hz (FS[2:0] = 011
4
)
REFIN = REFIN(+) – REFIN(–)
Average Input Current
Average Input Current Drift
Normal Mode Rejection
2
@ 50 Hz, 60 Hz
@ 50 Hz
@ 60 Hz
Common Mode Rejection
@ DC
@ 50 Hz, 60 Hz
2
REFERENCE INPUT
REFIN Voltage
Reference Voltage Range
2
Absolute REFIN Voltage Limits
2
Average Reference Input Current
Average Reference Input Current Drift
±400
±50
65
80
80
90
100
2.5
0.1
V
DD
GND – 30 mV
V
DD
+ 30 mV
0.5
±0.03
nA/V typ
pA/V/°C typ
dB min
dB min
dB min
dB min
dB min
V nom
V min
V max
V min
V max
μA/V typ
nA/V/°C typ
1
Temperature Range –40°C to +105°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).
4
FS[2:0] are the three bits used in the filter register to select the output word rate.
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