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參數資料
| 型號： | AD7880BQ |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | LC2MOS Single +5 V Supply, Low Power, 12-Bit Sampling ADC |
| 中文描述： | 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, CDIP24 |
| 封裝： | 0.300 INCH, HERMETIC SEALED, CERDIP-24 |
| 文件頁數： | 2/16頁 |
| 文件大小： | 337K |
| 代理商： | AD7880BQ |
REV. 0
–2–
AD7880–SPECIFICATIONS
Parameter
DYNAMIC PERFORMANCE
2
Signal-to-Noise Ratio
3
(SNR)
B Versions
1
C Versions
1
Units
T est Conditions/Comments
70
70
dB min
T ypically SNR Is 72 dB
V
IN
= 1 kHz Sine Wave, f
SAMPLE
= 66 kHz
V
IN
= 1 kHz Sine Wave, f
SAMPLE
= 66 kHz
V
IN
= 1 kHz, f
SAMPLE
= 66 kHz
T otal Harmonic Distortion (T HD)
Peak Harmonic or Spurious Noise
Intermodulation Distortion (IMD)
Second Order T erms
T hird Order T erms
DC ACCURACY
Resolution
–80
–80
–80
–80
dB typ
dB typ
–80
–80
–80
–80
dB typ
dB typ
fa = 0.983 kHz, fb = 1.05 kHz, f
SAMPLE
= 66 kHz
fa = 0.983 kHz, fb = 1.05 kHz, f
SAMPLE
= 66 kHz
12
12
Bits
All DC ACCURACY Specifications Apply for
the T hree Analog Input Ranges
Integral Nonlinearity
Differential Nonlinearity
Full-Scale Error
Bipolar Zero Error
Unipolar Offset Error
ANALOG INPUT
Input Voltage Ranges
±
1
±
1
±
15
±
10
±
5
±
1
±
1
±
5
±
5
±
5
LSB max
LSB max
LSB max
LSB max
LSB max
Guaranteed Monotonic
0 to V
REF
0 to 2 V
REF
±
V
REF
10
5/12
5/12
0 to V
REF
0 to 2 V
REF
±
V
REF
10
5/12
5/12
Volts
Volts
Volts
M
min
k
min/max
k
min/max
See Figure 5
See Figure 6
See Figure 7
0 to V
REF
Range
8 k
typical: 0 to 2 V
REF
Range
8 k
typical:
±
V
REF
Range
Input Resistance
REFERENCE INPUT
V
REF
(For Specified Performance)
I
REF
Nominal Reference Range
LOGIC INPUT S
CONVST
,
RD
,
CS
, CLK IN
Input High Voltage, V
INH
Input Low Voltage, V
INL
Input Current, I
IN
Input Capacitance, C
IN4
MODE INPUT
Input High Voltage, V
INH
Input Low Voltage, V
INL
Input Current, I
IN
Input Capacitance, C
IN4
LOGIC OUT PUT S
DB11–DB0,
BUSY
Output High Voltage, V
OH
Output Low Voltage, V
OL
DB11–DB0
Floating-State Leakage Current
Floating-State Output Capacitance
4
CONVERSION
Conversion T ime
T rack/Hold Acquisition T ime
POWER REQUIREMENT S
V
DD
I
DD
Normal Power Mode @ +25
°
C
T
MIN
to T
MAX
Power Save Mode @ +25
°
C
T
MIN
to T
MAX
Power Dissipation
Normal Power Mode @ +25
°
C
T
MIN
to T
MAX
Power Save Mode @ +25
°
C
T
MIN
to T
MAX
NOT ES
1
T emperature ranges are as follows: B/C Versions, –40
°
C to +85
°
C.
2
V
= 0 to V
3
SNR calculation includes distortion and noise components.
4
Sample tested @ +25
°
C to ensure compliance.
Specifications subject to change without notice.
5
1.5
2.5/V
DD
5
1.5
2.5/V
DD
V
mA max
V min/max
±
5%: Normally V
REF
= V
DD
(See Reference Input Section)
See Figure 3 for Degradation in Performance Down to 2.5 V
2.4
0.8
±
10
10
2.4
0.8
±
10
10
V min
V max
μ
A max
pF max
V
IN
= 0 V or V
DD
4
1
±
125
10
4
1
±
125
10
V min
V max
μ
A max
pF max
V
IN
= 0 V or V
DD
4.0
0.4
4.0
0.4
V min
V max
I
SOURCE
= 400
μ
A
I
SINK
= 1.6 mA
±
10
10
±
10
10
μ
A max
pF max
12
3
12
3
μ
s max
μ
s max
f
CLK IN
= 2.5 MHz
+5
+5
V nom
±
5% for Specified Performance
7.5
10
750
1
7.5
10
750
1
mA max
mA max
μ
A max
mA max
T ypically 4 mA; MODE = V
DD
T ypically 5 mA; MODE = V
DD
Logic Inputs @ 0 V or V
DD
; MODE = 0 V
Logic Inputs @ 0 V or V
DD
; MODE = 0 V
37.5
50
3.75
5
37.5
50
3.75
5
mW max
mW max
mW max
mW max
V
DD
= 5 V: T ypically 20 mW; MODE = V
DD
V
DD
= 5 V: T ypically 25 mW; MODE = V
DD
V
DD
= 5 V: T ypically 2 mW; MODE = 0 V
V
DD
= 5 V: T ypically 2.5 mW; MODE = 0 V
(V
DD
= +5 V
6
5%, V
REF
= V
DD
, AGND = DGND = OV, f
CLKIN
= 2.5 MHz, MODE = V
DD
unless otherwse noted. All Specifications T
MN
to T
MAX
unless otherwse noted.)
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