參數(shù)資料
型號: AD7703ARZ
廠商: Analog Devices Inc
文件頁數(shù): 9/16頁
文件大?。?/td> 0K
描述: IC ADC 20BIT LC2MOS 20-SOIC
標準包裝: 1
位數(shù): 20
采樣率(每秒): 4k
數(shù)據(jù)接口: 串行
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 37mW
電壓電源: 模擬和數(shù)字,雙 ±
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 20-SOIC(0.295",7.50mm 寬)
供應(yīng)商設(shè)備封裝: 20-SOIC W
包裝: 管件
輸入數(shù)目和類型: 1 個單端,單極;1 個單端,雙極
REV. E
–2–
AD7703–SPECIFICATIONS
Parameter
A/S Version
2
B Version
2
C Version
2
Unit
Test Conditions/Comments
STATIC PERFORMANCE
Resolution
20
Bits
Integral Nonlinearity, TMIN to TMAX
±0.0015
±0.0007
±0.0003
% FSR typ
25°C
±0.003
±0.0015
±0.0008
% FSR max
TMIN to TMAX
±0.003
±0.0015
±0.0012
% FSR max
Differential Nonlinearity, TMIN to TMAX
±0.5
LSB typ
Guaranteed No Missing Codes
Positive Full-Scale Error
3
±4
LSB typ
±16
LSB max
Full-Scale Drift
4
±19/±37
±19
LSB typ
Unipolar Offset Error
3
±4
LSB typ
±16
LSB max
Unipolar Offset Drift
4
±26
LSB typ
Temp Range: 0°C to +70°C
±67 +48/–400
±67
LSB typ
Specified Temp Range
Bipolar Zero Error
3
±4
LSB typ
±16
LSB max
Bipolar Zero Drift
4
±13
LSB typ
Temp Range: 0°C to +70°C
±34 +24/–200
±34
LSB typ
Specified Temp Range
Bipolar Negative Full-Scale Errors
3
±8
LSB typ
±32
LSB max
Bipolar Negative Full-Scale Drift
4
±10/±20
±10
LSB typ
Noise (Referred to Output)
1.6
LSB rms typ
DYNAMIC PERFORMANCE
Sampling Frequency, fS
fCLKIN/256
Hz
Output Update Rate, fOUT
fCLKIN/1024
Hz
Filter Corner Frequency, f–3 dB
fCLKIN/409,600
Hz
Settling Time to ±0.0007% FS
507904/fCLKIN
sec
For Full-Scale Input Step
SYSTEM CALIBRATION
Positive Full-Scale Calibration Range
VREF + 0.1
V max
System calibration applies to
Positive Full-Scale Overrange
VREF + 0.1
V max
unipolar and bipolar ranges.
Negative Full-Scale Overrange
–(VREF + 0.1)
V max
After calibration, if AIN > VREF,
Maximum Offset Calibration Ranges
5, 6
the device will output all 1s.
Unipolar Input Range
–(VREF + 0.1)
V max
If AIN < 0 (unipolar) or –VREF
Bipolar Input Range
–0.4 VREF to +0.4 VREF –0.4 VREF to +0.4 VREF –0.4 VREF to +0.4 VREF V max
(bipolar), the device will
Input Span
7
0.8 VREF
V min
output all 0s.
2 VREF + 0.2
V max
ANALOG INPUT
Unipolar Input Range
0 to 2.5
V
Bipolar Input Range
±2.5
V
Input Capacitance
20
pF typ
Input Bias Current
1
111nA typ
LOGIC INPUTS
All Inputs Except CLKIN
VINL, Input Low Voltage
0.8
V max
VINH, Input High Voltage
2.0
V min
CLKIN
VINL, Input Low Voltage
0.8
V max
VINH, Input High Voltage
3.5
V min
IIN, Input Current
10
A max
LOGIC OUTPUTS
VOL, Output Low Voltage
0.4
V max
ISINK = 1.6 mA
VOH, Output High Voltage
DVDD – 1DVDD – 1DVDD – 1V min
ISOURCE = 100 A
Floating State Leakage Current
±10
A max
Floating State Output Capacitance
999pF typ
POWER REQUIREMENTS
Power Supply Voltages
Analog Positive Supply (AVDD)
4.5/5.5
V min/V max
For Specified Performance
Digital Positive Supply (DVDD)
4.5/AVDD
V min/V max
Analog Negative Supply (AVSS)
–4.5/–5.5
V min/V max
Digital Negative Supply (DVSS)
–4.5/–5.5
V min/V max
Calibration Memory Retention
Power Supply Voltage
2.0
V min
(TA = 25 C; AVDD = DVDD = +5 V; AVSS = DVSS = –5 V; VREF = +2.5 V; fCLKIN = 4.096 MHz;
BP/
UP = +5 V; MODE = +5 V; A
IN Source Resistance = 1 k
1 with 1 nF to AGND at A
IN; unless otherwise noted.)
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