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AD7701ARS bảng dữ liệu(PDF) 2 Page - Analog Devices

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REV. D
–2–
(TA = +25 C; AVDD = DVDD = +5 V; AVSS = DVSS = –5 V; VREF = +2.5 V; fCLKIN =
4.096 MHz; Bipolar Mode: MODE = +5 V; AIN Source Resistance = 1k
1 with 1 nF to
AGND at AIN, unless otherwise noted.)
AD7701–SPECIFICATIONS
Parameter
A, S Versions
2
B, T Versions
2
Units
Test Conditions/Comments
STATIC PERFORMANCE
Resolution
16
16
Bits
Integral Nonlinearity
TMIN to TMAX
±0.0007
% FSR typ
±0.003
±0.0015
% FSR max
Differential Nonlinearity
TMIN to TMAX
±0.125
±0.125
LSB typ
Guaranteed No Missing Codes
±0.5
±0.5
LSB max
Positive Full-Scale Error
3
±0.13
±0.13
LSB typ
±0.5
±0.5
LSB max
Full-Scale Drift
4
±1.2 (±2.3 S Version)
±1.2 (±2.3 T Version)
LSB typ
Unipolar Offset Error
3
±0.25
±0.25
LSB typ
±1
±1
LSB max
Unipolar Offset Drift
4
±1.6 (+3/–25 S Version)
±1.6 (+3/–25 T Version)
LSB typ
Bipolar Zero Error
3
±0.25
±0.25
LSB typ
±1
± 1
LSB max
Bipolar Zero Drift
4
±0.8 (+1.5/–12.5 S Version) ±0.8 (+1.5/–12.5 T Version) LSB typ
Bipolar Negative Full-Scale Error
3
±0.5
±0.5
LSB typ
±2
±2
LSB max
Bipolar Negative Full-Scale Drift
4
±0.6 (±1.2 S Version)
±0.6 (±1.2 T Version)
LSB typ
Noise (Referred to Output)
0.1
0.1
LSB rms typ
DYNAMIC PERFORMANCE
Sampling Frequency, fS
fCLKIN/256
fCLKIN/256
Hz
Output Update Rate, fOUT
fCLKIN/1024
fCLKIN/1024
Hz
Filter Corner Frequency, f –3 dB
fCLKIN/409,600
fCLKIN/409,600
Hz
Settling Time to
±0.0007% FS
507904/fCLKIN
507904/fCLKIN
sec
For Full-Scale Input Step
SYSTEM CALIBRATION
Applies to Unipolar and
Positive Full-Scale Overrange
VREF + 0.1
VREF + 0.1
V max
Bipolar Ranges. After Cali-
Positive Full-Scale Overrange
VREF + 0.1
VREF + 0.1
V max
bration, If AIN > VREF, the
Negative Full-Scale Overrange
–(VREF + 0.1)
–(VREF + 0.1)
V max
Device Will Output All 1s
Maximum Offset Calibration Range
5, 6
If AIN < 0 (Unipolar) or
Unipolar Input Range
–(VREF + 0.1)
–(VREF + 0.1)
V max
–VREF (Bipolar), the Device
Bipolar Input Range
–0.4 VREF to +0.4 VREF
–0.4 VREF to +0.4 VREF
V max
Will Output All 0s.
Input Span
7
0.8 VREF
0.8 VREF
V min
2 VREF + 0.2
2 VREF + 0.2
V max
ANALOG INPUT
Unipolar Input Range
0 to +2.5
0 to +2.5
Volts
Bipolar Input Range
±2.5
±2.5
Volts
Input Capacitance
10
10
pF typ
Input Bias Current
1
1
1
nA typ
LOGIC INPUTS
All Inputs Except CLKIN
VINL, Input Low Voltage
0.8
0.8
V max
VINH, Input High Voltage
2.0
2.0
V min
CLKIN
VINL, Input Low Voltage
0.8
0.8
V max
VINH, Input High Voltage
3.5
3.5
V min
IIN, Input Current
10
10
µA max
LOGIC OUTPUTS
VOL, Output Low Voltage
0.4
0.4
V max
ISINK = 1.6 mA
VOH, Output High Voltage
DVDD – 1
DVDD – 1
V min
ISOURCE = 100 µA
Floating State Leakage Current
±10
±10
µA max
Floating State Output Capacitance
9
9
pF typ


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