參數(shù)資料
型號: AD7855
廠商: Analog Devices, Inc.
英文描述: 3 V to 5 V Single Supply, 600 kSPS 12-Bit Sampling ADCs(單電源,600kSPS12位采樣A/D轉(zhuǎn)換器)
中文描述: 3 V至5 V單電源,600 kSPS的12位采樣ADC(單電源,600kSPS12位采樣的A / D轉(zhuǎn)換器)
文件頁數(shù): 2/3頁
文件大?。?/td> 175K
代理商: AD7855
PRELIMINARY TECHNICAL DATA
AD7855–SPECIFICATIONS
1, 2
DD
= DV
DD
= +3.0 V to +5.5 V, REF
IN
= 2.5 V
External Reference, f
CLKIN
= 12 MHz ; f
SAMPLE
= 600 kHz ; T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
AD7855
2
Preim. A 12/97
Parameter
A Version
1
Units
Test Conditions/Comments
DYNAMIC PERFORMANCE
Signal to Noise + Distortion Ratio
3
(SNR)
Total Harmonic Distortion (THD)
Peak Harmonic or Spurious Noise
Intermodulation Distortion (IMD)
Second Order Terms
Third Order Terms
70
dB min
Typically SNR is 72 dB
V
IN
= 10 kHz Sine Wave, f
SAMPLE
= 600 kHz
V
IN
= 10 kHz Sine Wave, f
SAMPLE
= 600 kHz
V
IN
= 10 kHz Sine Wave, f
SAMPLE
= 600 kHz
–78
–78
dB max
dB max
–78
–78
dB typ
dB typ
fa = 9.983 kHz, fb = 10.05 kHz, f
SAMPLE
= 600 kHz
fa = 9.983 kHz, fb = 10.05 kHz, f
SAMPLE
= 600 kHz
DC ACCURACY
Resolution
Integral Nonlinearity
Differential Nonlinearity
Unipolar Offset Error
12
±1
±1
±3
±2
±4
±2
±4
±2
±4
±2
±4
Bits
LSB max
LSB max
LSB max
LSB typ
LSB max
LSB typ
LSB max
LSB typ
LSB max
LSB typ
LSB max
5 V Reference V
DD
= 5 V
Guaranteed No Missed Codes to 12 Bits
Unipolar Gain Error
Bipolar Positive Full-Scale Error
Negative Full-Scale Error
Bipolar Zero Error
ANALOG INPUT
Input Voltage Ranges
0 to V
REF
Volts
i.e., AIN(+) – AIN(–) = 0 to V
REF
, AIN(–) can be
biased up but AIN(+) cannot go below AIN(–).
i.e., AIN(+) – AIN(–) = –V
REF
/2 to +V
REF
/2, AIN(–)
should be biased to +V
REF
/2 and AIN(+) can go below
AIN(–) but cannot go below 0 V.
±V
REF
/2
Volts
Leakage Current
Input Capacitance
±1
20
μA max
pF typ
REFERENCE INPUT
REF
IN
Input Voltage Range
Input Impedance
2.3/V
DD
150
V min/max
k
typ
Functional from 1.2 V
LOGIC INPUTS
Input High Voltage, V
INH
3
2.1
0.4
0.6
±10
10
V min
V min
V max
V max
μA max
pF max
AV
DD
= DV
DD
= 4.5 V to 5.5 V
AV
DD
= DV
DD
= 3.0 V to 3.6 V
AV
DD
= DV
DD
= 4.5 V to 5.5 V
AV
DD
= DV
DD
= 3.0 V to 3.6 V
Typically 10 nA, V
IN
= 0 V or V
DD
Input Low Voltage, V
INL
Input Current, I
IN
Input Capacitance, C
IN4
LOGIC OUTPUTS
Output High Voltage, V
OH
I
SOURCE
= 200 μA
AV
DD
= DV
DD
= 4.5 V to 5.5 V
AV
DD
= DV
DD
= 3.0 V to 3.6 V
I
SINK
= 0.8 mA
4
2.4
0.4
±10
10
Straight (Natural) Binary
Twos Complement
V min
V min
V max
μA max
pF max
Output Low Voltage, V
OL
Floating-State Leakage Current
Floating-State Output Capacitance
4
Output Coding
Unipolar Input Range
Bipolar Input Range
CONVERSION RATE
Conversion Time
Track/Hold Acquisition Time
t
CLKIN
x 18
1.2
0.5
μs max
μs min
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