AD7705 Ver la hoja de datos (PDF) - Analog Devices
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AD7705 Datasheet PDF : 44 Pages
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AD7705/AD7706
SPECIFICATIONS
VDD = 3 V or 5 V, REF IN(+) = 1.225 V with VDD = 3 V, and 2.5 V with VDD = 5 V; REF IN(−) = GND; MCLK IN = 2.4576 MHz, unless
otherwise noted. All specifications TMIN to TMAX, unless otherwise noted.
Table 1.
Parameter
STATIC PERFORMANCE
No Missing Codes
Output Noise
Integral Nonlinearity2
Unipolar Offset Error3
Unipolar Offset Drift4
Bipolar Zero Error3
Bipolar Zero Drift4
Positive Full-Scale Error3, 5
Full-Scale Drift4, 6
Gain Error3, 7
Gain Drift4, 8
Bipolar Negative Full-Scale Error2
Bipolar Negative Full-Scale Drift4
ANALOG INPUTS/REFERENCE INPUTS
Common-Mode Rejection (CMR)2
VDD = 5 V
Gain = 1
Gain = 2
Gain = 4
Gain = 8 to 128
VDD = 3 V
Gain = 1
Gain = 2
Gain = 4
Gain = 8 to 128
Normal-Mode 50 Hz Rejection2
Normal-Mode 60 Hz Rejection2
Common-Mode 50 Hz Rejection2
Common-Mode 60 Hz Rejection2
Absolute/Common-Mode REF IN
Voltage2
Absolute/Common-Mode AIN
Voltage2, 9, 10
Absolute/Common-Mode AIN
Voltage2, 9
AIN DC Input Current2
AIN Sampling Capacitance2
AIN Differential Voltage Range11
B Version1
16
See Table 5 and
Table 7
±0.003
0.5
0.5
0.1
0.5
0.5
±0.003
1
0.6
96
105
110
130
105
110
120
130
98
98
150
150
GND to VDD
GND − 100 mV
VDD + 30 mV
GND + 50 mV
VDD − 1.5 V
1
10
0 to +VREF/gain12
±VREF/gain
Unit
Conditions/Comments
Bits min
Guaranteed by design, filter notch < 60 Hz
Depends on filter cutoffs and selected gain
% of FSR max Filter notch < 60 Hz, typically ±0.0003%
μV/°C typ
μV/°C typ
μV/°C typ
For gains 1, 2, and 4
For gains 8, 16, 32, 64, and 128
μV/°C typ
ppm of FSR/°C
typ
% of FSR typ
μV/°C typ
μV/°C typ
Typically ±0.001%
For gains of 1 to 4
For gains of 8 to 128
Specifications for AIN and REF IN, unless otherwise
noted
dB typ
dB typ
dB typ
dB typ
dB typ
dB typ
dB typ
dB typ
dB typ
dB typ
dB typ
dB typ
V min to V max
For filter notches of 25 Hz, 50 Hz, ±0.02 × fNOTCH
For filter notches of 20 Hz, 60 Hz, ±0.02 × fNOTCH
For filter notches of 25 Hz, 50 Hz, ±0.02 × fNOTCH
For filter notches of 20 Hz, 60 Hz, ±0.02 × fNOTCH
V min
BUF bit of setup register = 0
V max
V min
BUF bit of setup register = 1
V max
nA max
pF max
nom
nom
Unipolar input range (B/U bit of setup register = 1)
Bipolar input range (B/U bit of setup register = 0)
Rev. C | Page 5 of 44
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