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參數資料
| 型號： | AD7641 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 18-Bit, 2 MSPS SAR ADC |
| 中文描述： | 18位，2 MSPS的SAR型ADC |
| 文件頁數： | 3/24頁 |
| 文件大小： | 324K |
| 代理商： | AD7641 |
Preliminary Technical Data
AD7641
SPECIFICATIONS
Table 2.
40°C to +85°C, V
REF
= AVDD, AVDD = DVDD = OVDD = 2.5 V, unless otherwise noted.
Parameter
Conditions
RESOLUTION
ANALOG INPUT
Voltage Range
V
IN+
– V
IN
Operating Input Voltage
V
IN+,
V
IN
to AGND
Analog Input CMRR
f
IN
= 100 kHz
Input Current
2 MSPS Throughput
Input Impedance
1
THROUGHPUT SPEED
Complete Cycle
In Warp Mode
Throughput Rate
In Warp Mode
Time Between Conversions
In Warp Mode
Complete Cycle
In Normal Mode
Throughput Rate
In Normal Mode
DC ACCURACY
Integral Linearity Error
Differential Linearity Error
No Missing Codes
Transition Noise
V
REF
= AVDD
Gain Error, T
MIN
to T
MAX 3
Gain Error Temperature Drift
Zero Error, T
MIN
to T
MAX
3
Zero Error Temperature Drift
Power Supply Sensitivity
AVDD = 2.5V ± 5%
AC ACCURACY
Signal-to-Noise
f
IN
= 100 kHz,
V
REF
=AVDD
V
REF
=2.048V
Spurious Free Dynamic Range
f
IN
= 100 kHz
Total Harmonic Distortion
f
IN
= 100 kHz
Signal-to-(Noise+Distortion)
f
IN
= 100 kHz,
f
IN
= 100 kHz, -60 dB Input
-3 dB Input Bandwidth
SAMPLING DYNAMICS
Aperture Delay
Aperture Jitter
Transient Response
Full-Scale Step
Overvoltage recovery
REFERENCE
External Reference Voltage Range
REF
REF Current Drain
2 MSPS Throughput
REF Voltage with reference buffer
REFBUFIN=1.2V
Reference Buffer Input Voltage
REFBUFIN
REFBUFIN Input Current
INTERNAL REFERENCE
Internal Reference Voltage
@ 25°C
Internal Reference Temp Drift
– 40°C to +85°C
REFBUFIN Line Regulation
AVDD = 2.5V ± 5%
REFBUFIN Output Resistance
Turn-on Settling Time
Long-term Stability
1,000 Hours
Rev. Pr E | Page 3 of 24
Min
18
–V
REF
-0.1
0.001
0
–3
–1
18
TBD
2
TBD
–1
1.197
Typ
60
TBD
See Analog Inputs Section
± 2
56
±0.5
±TBD
±1.6
±5
93
91.3
100
–100
93
33
50
1
5
2.048
TBD
2.048
1.2
1.2
3
±15
5
100
Max
+V
REF
AVDD
500
2
1
667
1.5
+3
±TBD
±TBD
160
160
AVDD
2.1
TBD
+ 1
1.203
Unit
Bits
V
V
dB
μA
ns
MSPS
ms
ns
MSPS
LSB
2
LSB
Bits
μV
% of FSR
ppm/°C
LSB
ppm/°C
LSB
dB
4
dB
dB
dB
dB
dB
MHz
ns
ps rms
ns
ns
V
μA
V
V
μA
V
ppm/°C
ppm/V
k
ms
ppm/1000hours
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