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AD7705BR Scheda tecnica(PDF) 6 Page - Analog Devices

Il numero della parte AD7705BR
Spiegazioni elettronici  3 V/5 V, 1 mW, 2-/3-Channel, 16-Bit, Sigma-Delta ADCs
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

AD7705BR Scheda tecnica(HTML) 6 Page - Analog Devices

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AD7705/AD7706
Rev. C | Page 6 of 44
Parameter
B Version1
Unit
Conditions/Comments
AIN Input Sampling Rate, fS
Gain × fCLKIN/64
For gains of 1 to 4
fCLKIN/8
For gains of 8 to 128
Reference Input Range
REF IN(+) − REF IN(−) Voltage
1/1.75
V min/V max
VDD = 2.7 V to 3.3 V
VREF = 1.225 ± 1% for specified performance
REF IN(+) − REF IN(−) Voltage
1/3.5
V min/V max
VDD = 4.75 V to 5.25 V
VREF = 2.5 ± 1% for specified performance
REF IN Input Sampling Rate, fS
fCLKIN/64
LOGIC INPUTS
Input Current
All Inputs, Except MCLK IN
±1
μA max
Typically ±20 nA
MCLK IN
±10
μA max
Typically ±2 μA
All Inputs, Except SCLK and MCLK IN
Input Low Voltage, VINL
0.8
V max
VDD = 5 V
0.4
V max
VDD = 3 V
Input High Voltage, VINH
2.0
V min
VDD = 3 V and 5 V
SCLK Only (Schmitt-Triggered Input)
VDD = 5 V nominal
VT+
1.4/3
V min/V max
VT−
0.8/1.4
V min/V max
VT+ − VT−
0.4/0.8
V min/V max
SCLK Only (Schmitt-Triggered Input)
VDD = 3 V nominal
VT+
1/2
V min/V max
VT−
0.4/1.1
V min/V max
VT+ − VT−
0.375/0.8
V min/V max
MCLK IN Only
VDD = 5 V nominal
Input Low Voltage, VINL
0.8
V max
Input High Voltage, VINH
3.5
V min
MCLK IN Only
VDD = 3 V nominal
Input Low Voltage, VINL
0.4
V max
Input High Voltage, VINH
2.5
V min
LOGIC OUTPUTS (Including MCLK OUT)
Output Low Voltage, VOL
0.4
V max
ISINK = 800 μA, except for MCLK OUT;13 VDD = 5 V
Output Low Voltage, VOL
0.4
V max
ISINK = 100 μA, except for MCLK OUT;13 VDD = 3 V
Output High Voltage, VOH
4
V min
ISOURCE = 200 μA, except for MCLK OUT;13 VDD = 5 V
Output High Voltage, VOH
VDD − 0.6
V min
ISOURCE = 100 μA, except for MCLK OUT;13 VDD = 3 V
Floating State Leakage Current
±10
μA max
Floating State Output Capacitance14
9
pF typ
Data Output Coding
Binary
Unipolar mode
Offset binary
Bipolar mode
SYSTEM CALIBRATION
Positive Full-Scale Limit15
(1.05 × VREF)/gain
V max
Gain is the selected PGA gain (1 to 128)
Negative Full-Scale Limit15
−(1.05 × VREF)/gain
V max
Gain is the selected PGA gain (1 to 128)
Offset Limit15
−(1.05 × VREF)/gain
V max
Gain is the selected PGA gain (1 to 128)
Input Span16
(0.8 × VREF)/gain
V min
Gain is the selected PGA gain (1 to 128)
(2.1 × VREF)/gain
V max
Gain is the selected PGA gain (1 to 128)


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