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AD7730LBR Fiches technique(PDF) 2 Page - Analog Devices

No de pièce AD7730LBR
Description  Bridge Transducer ADC
PDF  52 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
Logo AD - Analog Devices

AD7730LBR Fiches technique(HTML) 2 Page - Analog Devices

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–2–
REV. A
Parameter
B Version
1
Units
Conditions/Comments
STATIC PERFORMANCE (CHP = 1)
No Missing Codes
2
24
Bits min
Output Noise and Update Rates
2
See Tables I & II
Integral Nonlinearity
18
ppm of FSR max
Offset Error
2
See Note 3
Offset Error and Offset Drift Refer to Both
Offset Drift vs. Temperature
2
5
nV/
°C typ
Unipolar Offset and Bipolar Zero Errors
Offset Drift vs. Time
4
25
nV/1000 Hours typ
Positive Full-Scale Error
2, 5
See Note 3
Positive Full-Scale Drift vs Temp
2, 6, 7
2
ppm of FS/
°C max
Positive Full-Scale Drift vs Time
4
10
ppm of FS/1000 Hours typ
Gain Error
2, 8
See Note 3
Gain Drift vs. Temperature
2, 6, 9
2
ppm/
°C max
Gain Drift vs. Time
4
10
ppm/1000 Hours typ
Bipolar Negative Full-Scale Error
2
See Note 3
Negative Full-Scale Drift vs. Temp
2, 6
2
ppm of FS/
°C max
Power Supply Rejection
120
dB typ
Measured with Zero Differential Voltage
Common-Mode Rejection (CMR)
120
dB min
At DC. Measured with Zero Differential Voltage
Analog Input DC Bias Current
2
50
nA max
Analog Input DC Bias Current Drift
2
100
pA/
°C typ
Analog Input DC Offset Current
2
10
nA max
Analog Input DC Offset Current Drift
2
50
pA/
°C typ
STATIC PERFORMANCE (CHP = 0)
2
No Missing Codes
24
Bits min
SKIP = 0
10
Output Noise and Update Rates
See Tables III & IV
Integral Nonlinearity
18
ppm of FSR max
Offset Error
See Note 3
Offset Error and Offset Drift Refer to Both
Offset Drift vs. Temperature
6
0.5
µV/°C typ
Unipolar Offset and Bipolar Zero Errors
Offset Drift vs. Time
4
2.5
µV/1000 Hours typ
Positive Full-Scale Error
5
See Note 3
Positive Full-Scale Drift vs. Temp
6, 7
0.6
µV/°C typ
Positive Full-Scale Drift vs. Time
4
3
µV/1000 Hours typ
Gain Error
8
See Note 3
Gain Drift vs. Temperature
6, 9
2
ppm/
°C typ
Gain Drift vs. Time
4
10
ppm/1000 Hours typ
Bipolar Negative Full-Scale Error
See Note 3
Negative Full-Scale Drift vs. Temp
0.6
µV/°C typ
Power Supply Rejection
90
dB typ
Measured with Zero Differential Voltage
Common-Mode Rejection (CMR) on AIN 100
dB typ
At DC. Measured with Zero Differential Voltage
CMR on REF IN
120
dB typ
At DC. Measured with Zero Differential Voltage
Analog Input DC Bias Current
60
nA max
Analog Input DC Bias Current Drift
150
pA/
°C typ
Analog Input DC Offset Current
30
nA max
Analog Input DC Offset Current Drift
100
pA/
°C typ
ANALOG INPUTS/REFERENCE INPUTS
Normal-Mode 50 Hz Rejection
2
88
dB min
From 49 Hz to 51 Hz
Normal-Mode 60 Hz Rejection
2
88
dB min
From 59 Hz to 61 Hz
Common-Mode 50 Hz Rejection
2
120
dB min
From 49 Hz to 51 Hz
Common-Mode 60 Hz Rejection
2
120
dB min
From 59 Hz to 61 Hz
Analog Inputs
Differential Input Voltage Ranges
11
Assuming 2.5 V or 5 V Reference with
HIREF Bit Set Appropriately
0 to +10 or
±10
mV nom
Gain = 250
0 to +20 or
±20
mV nom
Gain = 125
0 to +40 or
±40
mV nom
Gain = 62.5
0 to +80 or
±80
mV nom
Gain = 31.25
Absolute/Common-Mode Voltage
12
AGND + 1.2 V
V min
AVDD – 0.95 V
V max
Reference Input
REF IN(+) – REF IN(–) Voltage
+2.5
V nom
HIREF Bit of Mode Register = 0
REF IN(+) – REF IN(–) Voltage
+5
V nom
HIREF Bit of Mode Register = 1
Absolute/Common-Mode Voltage
13
AGND – 30 mV
V min
AVDD + 30 mV
V max
NO REF Trigger Voltage
0.3
V min
NO REF Bit Active If VREF Below This Voltage
0.65
V max
NO REF Bit Inactive If VREF Above This Voltage
AD7730–SPECIFICATIONS
(AVDD = +5 V, DVDD = +3 V or +5 V; REF IN(+) = AVDD; REF IN(–) = AGND = DGND =
0 V; fCLK IN = 4.9152 MHz. All specifications TMIN to TMAX unless otherwise noted.)



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