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參數資料
| 型號： | AD7898 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 5 V, 12-Bit, Serial 220 kSPS ADC in an 8-Lead Package |
| 中文描述： | 5伏，12位，220 kSPS的串行ADC的8引腳封裝 |
| 文件頁數： | 2/16頁 |
| 文件大小： | 184K |
| 代理商： | AD7898 |
–2–
REV. 0
AD7898–SPECIFICATIONS
1
(V
DD
= 4.75 V to 5.25 V, V
DRIVE
= 2.7 V to 5.25 V; REF IN = 2.5 V. Specifications apply
A Version
l
DYNAMIC PERFORMANCE
Signal to (Noise + Distortion) Ratio
2
T
MIN
to T
MAX
71
Total Harmonic Distortion (THD)
2
–78
Peak Harmonic or Spurious Noise
2
–89
Intermodulation Distortion (IMD)
2
2nd Order Terms
–88
3rd Order Terms
–88
Aperture Delay
20
Aperture Jitter
75
Full Power Bandwidth–AD7898-10
3.6
Full Power Bandwidth–AD7898-3
4.7
Full Power Bandwidth–AD7898-10
2.15
Full Power Bandwidth–AD7898-3
2.4
DC ACCURACY
Resolution
12
Minimum Resolution for Which
12
No Missing Codes are Guaranteed
Relative Accuracy
2
±
1
Differential Nonlinearity
2
±
0.9
Positive Full-Scale Error
2
±
3
Negative Full-Scale Error
2
±
3
Bipolar Zero Error
±
4
ANALOG INPUT
AD7898-10
Input Voltage Range
±
10
Input Resistance
24
AD7898-3
Input Voltage Range
±
2.5
Input Resistance
5
REFERENCE INPUT
REF IN Input Voltage Range
2.375/2.625
Input Current
1
Input Capacitance
2, 3
10
LOGIC INPUTS
Input High Voltage, V
V
DRIVE
×
0.7
Input Low Voltage, V
IINH
V
DRIVE
×
0.3
Input Current, I
IN
±
1
Input Capacitance, C
IN2, 3
10
to both Mode 0 and Mode 1 operations; T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
Parameter
Unit
Test Conditions/Comments
dB min
dB max
dB typ
f
IN
= 30 kHz Sine Wave
f
IN
= 30 kHz Sine Wave
f
IN
= 30 kHz Sine Wave
fa = 29.1 kHz, fb
=
29.9 kHz
dB typ
dB typ
ns typ
ps typ
MHz typ
MHz typ
MHz typ
MHz typ
@ 3 dB
@ 3 dB
@ 1 dB
@ 1 dB
Bits
Bits
LSB max
LSB max
LSB max
LSB max
LSB max
Volts
k
min
Volts
k
min
V min/V max
μ
A max
pF max
2.5 V
±
5%
V min
V max
μ
A max
pF max
Typically 10 nA, V
IN
= 0 V or V
DRIVE
LOGIC OUTPUTS
Output High Voltage, V
OH
Output Low Voltage, V
Floating-State Leakage Current
Floating-State Output Capacitance
2, 3
Output Coding
V
DRIVE
– 0.4
0.4
±
10
10
Two’s Complement
V min
V max
μ
A max
pF max
I
SOURCE
= 200
μ
A; V
DRIVE
= 2.7 V to 5.25 V
I
SINK
μ
A
CONVERSION RATE
Mode 0 Operation
220
215
220
kSPS max
kSPS max
kSPS max
With V
DRIVE
= 5 V
±
5%
With V
DRIVE
= 2.7 V to 3.6 V
Mode 1 Operation
POWER REQUIREMENTS
V
DD
V
DRIVE
I
DD
Static
I
DD
Operational
Power Dissipation
POWER-DOWN MODE
I
DD
@ 25
°
C
T
to T
Power Dissipation @ 25
°
C (Operational)
NOTES
1
Temperature ranges are as follows: A Version: –40
°
C to +85
°
C.
2
See Terminology.
3
Sample tested @ 25
°
C to ensure compliance.
4
Operational with V
DRIVE
= 2.35 V, with Input Low Voltage, V
INL
= 0.4 V
Specifications subject to change without notice.
4.75 to 5.25
2.7 to 5.25
4.25
4.5
22.5
V min to V max
V min to V max
mA max
mA max
mW max
For Specified Performance
For Specified Performance
Digital Inputs @ V
DRIVE
Digital Inputs @ V
DRIVE
5
20
25
μ
A max
μ
A max
μ
W max
Digital Inputs @ GND, V
DD
= 5 V
±
5%
Digital Inputs @ GND, V
DD
= 5 V
±
5%
V
DD
= 5 V
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