Datasheet

AD7707
Rev. B | Page 4 of 52
SPECIFICATIONS
AV
DD
= DV
DD
= 3 V or 5 V, REF IN(+) = 1.225 V with AV
DD
= 3 V and 2.5 V with AV
DD
= 5 V; REF IN(−) = GND; VBIAS = REFIN(+);
MCLK IN = 2.4576 MHz unless otherwise noted. All specifications T
MIN
to T
MAX
, unless otherwise noted.
Table 1.
Parameter B Version
1
Unit Conditions/Comments
STATIC PERFORMANCE
Low Level Input Channels (AIN1 and AIN2)
No Missing Codes 16 Bits min Guaranteed by design; filter notch < 60 Hz
Output Noise
See
Table 7 to
Table 10
Depends on filter cutoffs and selected gain
Integral Nonlinearity
2
±0.003 % of FSR max Filter notch < 60 Hz; typically ±0.0003%
Unipolar Offset Error
3
Unipolar Offset Drift
4
0.5 μV/°C typ
Bipolar Zero Error
3
Bipolar Zero Drift
4
0.5 μV/°C typ For gains of 1, 2, and 4
0.1 μV/°C typ For gains of 8, 16, 32, 64, and 128
Positive Full-Scale Error
3, 5
Full-Scale Drift
4, 6
0.5 μV/°C typ
Gain Error
3, 7
Gain Drift
4, 8
0.5 ppm of FSR/°C typ
Bipolar Negative Full-Scale Error
2
±0.003 % of FSR max Typically ±0.0007%
Bipolar Negative Full-Scale Drift
4
1 μV/°C typ For gains of 1 to 4
0.6 μV/°C typ For gains of 8 to 128
HIGH LEVEL INPUT CHANNEL (AIN3)
No Missing Codes 16 Bits min Guaranteed by design; filter notch < 60 Hz
Output Noise
See
Table 11 to
Table 13
Depends on filter cutoffs and selected gain
Integral Nonlinearity
2
±0.003 % of FSR max Filter notch < 60 Hz; typically ±0.0003%
Unipolar Offset Error
9
±10 mV max Typically within ±1.5 mV
Unipolar Offset Drift 4 μV/°Ctyp
Bipolar Zero Error
9
±10 mV max Typically within ±1.5 mV
Bipolar Zero Drift 4 μV/°C typ For gains of 1, 2, and 4
1 μV/°C typ For gains of 8, 16, 32, 64, and 128
Gain Error ±0.2 % typ Typically within ±0.05%
Gain Drift 0.5 ppm of FSR/°C typ
Negative Full-Scale Error
2
±0.0012 % of FSR typ
LOW LEVEL ANALOG INPUTS/REFERENCE INPUTS Specifications for AIN and REF IN,
unless otherwise noted
Input Common-Mode Rejection (CMR)
2
Low level input channels, AIN1 and AIN2
AV
DD
= 5 V
Gain = 1 100 dB typ
Gain = 2 105 dB typ
Gain = 4 110 dB typ
Gain = 8 to 128 130 dB typ
AV
DD
= 3 V
Gain = 1 105 dB typ
Gain = 2 110 dB typ
Gain = 4 120 dB typ
Gain = 8 to 128 130 dB typ
Normal-Mode 50 Hz Rejection
2
98 dB typ For filter notches of 10 Hz, 25 Hz, 50 Hz; ±0.02 × f
NOTCH
Normal-Mode 60 Hz Rejection
2
98 dB typ For filter notches of 10 Hz, 20 Hz, 60 Hz; ±0.02 × f
NOTCH
Common-Mode 50 Hz Rejection
2
150 dB typ For filter notches of 10 Hz, 25 Hz, 50 Hz; ±0.02 × f
NOTCH