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| 型號： | AD7870A |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Complete, 12-Bit, 100 kHz , Sampling ADC(完備的,頻率為100kHz,12位A/D轉(zhuǎn)換器) |
| 中文描述： | 完整的，12位，100千赫采樣ADC（完備的，頻率為100kHz的12位的A / D轉(zhuǎn)換器） |
| 文件頁數(shù)： | 2/12頁 |
| 文件大小： | 263K |
| 代理商： | AD7870A |
AD7870A–SPECIFICATIONS
–2–
REV. 0
(V
DD
= +5 V
6
5%, V
SS
= –5 V
6
5%, AGND = DGND = 0 V, f
CLK
is internal, unless
otherwise noted. All specifications T
MIN
to T
MAX
unless otherwise noted.)
Parameter
J
1
Units
Test Conditions/Comments
DYNAMIC PERFORMANCE
2
Signal-to-Noise Ratio
3
(SNR)
@ +25
°
C
T
MIN
to T
MAX
Total Harmonic Distortion (THD)
70
70
–80
dB min
dB min
dB max
V
IN
= 10 kHz Sine Wave, f
SAMPLE
= 100 kHz
Typically 71.5 dB for 0 < V
IN
50 kHz
V
IN
= 10 kHz Sine Wave, f
SAMPLE
= 100 kHz
Typically –86 dB for 0 < V
IN
< 50 kHz
V
IN
= 10 kHz, f
SAMPLE
= 100 kHz
Typically –86 dB for 0 < V
IN
< 50 kHz
Peak Harmonic or Spurious Noise
–80
dB max
Intermodulation Distortion (IMD)
Second Order Terms
Third Order Terms
Track/Hold Acquisition Time
DC ACCURACY
Resolution
Minimum Resolution for Which
No Missing Codes Are Guaranteed
Integral Nonlinearity
Bipolar Zero Error
Positive Full-Scale Error
4
Negative Full-Scale Error
4
ANALOG INPUT
Input Voltage Range
Input Current
REFERENCE OUTPUT
REF OUT @ +25
°
C
–80
–80
2
dB max
dB max
μ
s max
fa = 9 kHz, fb = 9.5 kHz, f
SAMPLE
= 50 kHz
fa = 9 kHz, fb = 9.5 kHz, f
SAMPLE
= 50 kHz
12
Bits
12
±
1/2
±
5
±
5
±
5
Bits
LSB typ
LSB max
LSB max
LSB max
±
3
±
500
Volts
μ
A max
2.99
3.01
±
60
±
1
V min
V max
ppm/
°
C max
mV max
REF OUT Tempco
Reference Load Sensitivity (
REF OUT/
I)
Reference Load Current Change (0
μ
A–500
μ
A)
Reference Load Should Not Be Change During Conversion
LOGIC INPUTS
Input High Voltage, V
INH
Input Low Voltage, V
INL
Input Current, I
IN
Input Current (12/
8
CLK Input Only)
Input Capacitance, C
IN5
LOGIC OUTPUTS
Output High Voltage, V
OH
Output Low Voltage, V
OL
DB11–DB0
Floating State Leakage Current
Floating-State Output Capacitance
5
CONVERSION TIME
External Clock (f
CLK
= 2.5 MHz)
Internal Clock
POWER REQUIREMENTS
V
DD
V
SS
I
DD
I
SS
Power Dissipation
2.4
0.8
±
10
±
10
10
V min
V max
μ
A max
μ
A max
pF max
V
DD
= 5 V
±
5%
V
DD
= 5 V
±
5%
V
IN
= 0 V to V
DD
V
IN
= V
SS
to V
DD
4.0
0.4
V min
V max
I
SOURCE
= 40
μ
A
I
SINK
= 1.6 mA
±
10
15
μ
A max
pF max
7.6/8
8/10
μ
s min/
μ
s max
μ
s min/
μ
s max
+5 V
–5
13
6
95
V nom
V non
mA max
mA max
mW max
±
5% for Specified Performance
±
5% for Specified Performance
Typically 8 mA
Typically 4 mA
Typically 60 mW
NOTES
1
Temperature range is as follow: J Version: 0
°
C to +70
°
C.
2
V
IN
(pk-pk) =
±
3 V.
3
SNR calculation includes distortion and noise components.
4
Measured with respect to internal reference and includes bipolar offset error.
5
Sample tested @ +25
°
C to ensure compliance.
Specifications subject to change without notice.
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