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AD7732 数据表(PDF) 4 Page - Analog Devices

部件名 AD7732
功能描述  2-Channel, 10 V Input Range, High Throughput, 24-Bit ADC
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD7732 数据表(HTML) 4 Page - Analog Devices

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AD7732
Rev. A | Page 4 of 32
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
RA, RB, RC, RD Pin Impedance1, 9
25
31
k
Ω
Input Resistor Matching
0.2
%
Input Resistor Temp. Coefficient
–30
ppm/°C
REFERENCE INPUTS
REFIN(+) to REFIN(–) Voltage1, 10
2.475
2.5
2.525
V
NOREF Trigger Voltage
0.5
V
NOREF Bit in Channel Status Register
REFIN(+), REFIN(–)
Common-Mode Voltage1
0
AVDD
V
Reference Input DC Current11
400
μA
SYSTEM CALIBRATION1, 12
Full-Scale Calibration Limit
+1.05
× FS
V
Zero-Scale Calibration Limit
–1.05
× FS
V
Input Span
0.8
× FS
2.1
× FS
V
LOGIC INPUTS
Input Current
±1
μA
Input Current CS
±10
μA
CS = DVDD
–40
μA
CS = DGND, Internal Pull-Up Resistor
Input Capacitance
5
pF
VT+1
1.4
2
V
DVDD = 5 V
VT–1
0.8
1.4
V
DVDD = 5 V
VT+ – VT–1
0.3
0.85
V
DVDD = 5 V
VT+1
0.95
2
V
DVDD = 3 V
VT– 1
0.4
1.1
V
DVDD = 3 V
VT+ – VT–1
0.3
0.85
V
DVDD = 3 V
MCLK IN ONLY
Input Current
±10
μA
Input Capacitance
5
pF
VINL Input Low Voltage
0.8
V
DVDD = 5 V
VINH Input High Voltage
3.5
V
DVDD = 5 V
VINL Input Low Voltage
0.4
V
DVDD = 3 V
VINH Input High Voltage
2.5
V
DVDD = 3 V
LOGIC OUTPUTS13
VOL Output Low Voltage
0.4
V
ISINK = 800 μA, DVDD = 5 V
VOH Output High Voltage
4.0
V
ISOURCE = 200 μA, DVDD = 5 V
VOL Output Low Voltage
0.4
V
ISINK = 100 μA, DVDD = 3 V
VOH Output High Voltage
DVDD – 0.6
V
ISOURCE = 100 μA, DVDD = 3 V
Floating State Leakage Current
±1
μA
Floating State Leakage Capacitance
3
pF
P0, P1 INPUTS/OUTPUTS
Levels Referenced to Analog Supplies
Input Current
±10
μA
VINL Input Low Voltage
0.8
V
AVDD = 5 V
VINH Input High Voltage
3.5
V
AVDD = 5 V
VOL Output Low Voltage
0.4
V
ISINK = 7 mA, See Abs. Max. Ratings
VOH Output High Voltage
4.0
V
ISOURCE = 200 μA, AVDD = 5 V
POWER REQUIREMENTS
AVDD–AGND Voltage
4.75
5.25
V
DVDD–DGND Voltage
4.75
5.25
V
2.70
3.60
V
AVDD Current (Normal Mode)
13.5
15.9
mA
AVDD = 5 V
DVDD Current (Normal Mode)14
2.8
3.1
mA
DVDD = 5 V
DVDD Current (Normal Mode) 14
1.0
1.5
mA
DVDD = 3 V


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