參數(shù)資料
型號： AD7854BRZ
廠商： Analog Devices Inc
文件頁數(shù)： 12/28頁
文件大?。?/td> 0K
描述： IC ADC 12BIT PARALLEL LP 28-SOIC
產(chǎn)品變化通告： Product Discontinuance 27/Oct/2011
標準包裝： 27
位數(shù)： 12
采樣率（每秒）： 200k
數(shù)據(jù)接口： 并聯(lián)
轉(zhuǎn)換器數(shù)目： 2
功率耗散（最大）： 30mW
電壓電源： 模擬和數(shù)字
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 28-SOIC（0.295"，7.50mm 寬）
供應商設備封裝： 28-SOIC W
包裝： 管件
輸入數(shù)目和類型： 1 個偽差分，單極；1 個偽差分，雙極
Parameter
A Version
1
B Version
1
S Version
1
Units
Test Conditions/Comments
DYNAMIC PERFORMANCE
Signal to Noise + Distortion Ratio
3
70
71
70
dB min
Typically SNR is 72 dB
(SNR)
VIN = 10 kHz Sine Wave, fSAMPLE = 200 kHz
(L Version: fSAMPLE = 100 kHz @ fCLKIN = 2 MHz)
Total Harmonic Distortion (THD)
–78
dB max
VIN = 10 kHz Sine Wave, fSAMPLE = 200 kHz
(L Version: fSAMPLE = 100 kHz @ fCLKIN = 2 MHz)
Peak Harmonic or Spurious Noise
–78
dB max
VIN = 10 kHz Sine Wave, fSAMPLE = 200 kHz
(L Version: fSAMPLE = 100 kHz @ fCLKIN = 2 MHz)
Intermodulation Distortion (IMD)
Second Order Terms
–78
dB typ
fa = 9.983 kHz, fb = 10.05 kHz, fSAMPLE = 200 kHz
(L Version: fSAMPLE = 100 kHz @ fCLKIN = 2 MHz)
Third Order Terms
–78
dB typ
fa = 9.983 kHz, fb = 10.05 kHz, fSAMPLE = 200 kHz
(L Version: fSAMPLE = 100 kHz @ fCLKIN = 2 MHz)
DC ACCURACY
Resolution
12
Bits
Integral Nonlinearity
±1
±0.5
±1
LSB max
5 V Reference VDD = 5 V
Differential Nonlinearity
±1
LSB max
Guaranteed No Missed Codes to 12 Bits
Unipolar Offset Error
±3
±4
LSB max
±2
LSB typ
Unipolar Gain Error
±4
LSB max
±2
LSB typ
Bipolar Positive Full-Scale Error
±4
±5
LSB max
±2
LSB typ
Negative Full-Scale Error
±4
±5
LSB max
±2
LSB typ
Bipolar Zero Error
±4
±5
LSB max
ANALOG INPUT
Input Voltage Ranges
0 to VREF
Volts
i.e., AIN(+) – AIN(–) = 0 to VREF, AIN(–) can be
biased up but AIN(+) cannot go below AIN(–).
±VREF/2
Volts
i.e., AIN(+) – AIN(–) = –VREF/2 to +VREF/2, AIN(–)
should be biased to +VREF/2 and AIN(+) can go below
AIN(–) but cannot go below 0 V.
Leakage Current
±1
A max
Input Capacitance
20
pF typ
REFERENCE INPUT/OUTPUT
REFIN Input Voltage Range
2.3/VDD
V min/max
Functional from 1.2 V
Input Impedance
150
k
typ
REFOUT Output Voltage
2.3/2.75
2.3/2.7
V min/max
REFOUT Tempco
20
ppm/
°C typ
LOGIC INPUTS
Input High Voltage, VINH
3
V min
AVDD = DVDD = 4.5 V to 5.5 V
2.1
V min
AVDD = DVDD = 3.0 V to 3.6 V
Input Low Voltage, VINL
0.4
V max
AVDD = DVDD = 4.5 V to 5.5 V
0.6
V max
AVDD = DVDD = 3.0 V to 3.6 V
Input Current, IIN
±10
A max
Typically 10 nA, VIN = 0 V or VDD
Input Capacitance, CIN
4
10
pF max
LOGIC OUTPUTS
Output High Voltage, VOH
ISOURCE = 200
A
4
V min
AVDD = DVDD = 4.5 V to 5.5 V
2.4
V min
AVDD = DVDD = 3.0 V to 3.6 V
Output Low Voltage, VOL
0.4
V max
ISINK = 0.8 mA
Floating-State Leakage Current
±10
A max
Floating-State Output Capacitance
4
10
pF max
Output Coding
Straight (Natural) Binary
Unipolar Input Range
Twos Complement
Bipolar Input Range
CONVERSION RATE
tCLKIN
× 18
Conversion Time
4.6 (10)
4.6 (9)
s max
(L Versions Only, 0
°C to +70°C, 1.8 MHz CLKIN)
Track/Hold Acquisition Time
0.5 (1)
s min
(L Versions Only, –40
°C to +85°C, 1 MHz CLKIN)
AD7854/AD7854L–SPECIFICATIONS1, 2 (AV
DD = DVDD = +3.0 V to +5.5 V, REFIN/REFOUT = 2.5 V
External Reference, fCLKIN = 4 MHz (for L Version: 1.8 MHz (0 C to +70 C) and 1 MHz (–40 C to +85 C)); fSAMPLE = 200 kHz (AD7854), 100 kHz
(AD7854L); TA = TMIN to TMAX, unless otherwise noted.) Specifications in () apply to the AD7854L.
–2–
REV. B
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