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AD7707 Datasheet(PDF) 6 Page - Analog Devices

Part # AD7707
Description  3-Channel 16-Bit, Sigma-Delta ADC
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7707 Datasheet(HTML) 6 Page - Analog Devices

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AD7707
Rev. B | Page 5 of 52
Parameter
B Version1
Unit
Conditions/Comments
Common-Mode 60 Hz Rejection2
150
dB typ
For filter notches of 10 Hz, 20 Hz, 60 Hz, ±0.02 × fNOTCH
Absolute/Common-Mode REF IN Voltage2
AGND to AVDD
V min to V max
Absolute/Common-Mode AIN Voltage2, 10
AGND – 100 mV
V min
BUF bit of setup register = 0
AVDD + 30 mV
V max
AGND + 50 mV
V min
BUF bit of setup register = 1
AVDD − 1.5 V
V max
AIN DC Input Current2
1
nA max
AIN Sampling Capacitance2
10
pF max
BUF = 0
AIN Differential Voltage Range11, 12
0 to +VREF/gain
V nom
Unipolar input range (
B/U bit of setup register = 1)
±VREF/gain
V nom
Bipolar input range (
B/U bit of setup register = 0)
AIN Input Sampling Rate, fS
Gain × fCLKIN/64
Hz nom
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/max
AVDD = 2.7 V to 3.3 V; VREF = 1.225 V ± 1% for
specified performance
REF IN(+) − REF IN(−) Voltage
1/3.5
V min/max
AVDD = 4.75 V to 5.25 V; VREF = 2.5 V ± 1% for
specified performance
REF IN Input Sampling Rate, fS
fCLKIN/64
±100 mV INPUT RANGE
Low level input channels, AIN1 and AIN2; gain = 16,
unbuffered mode
INL2
±0.003
% of FSR max
Filter notch < 60 Hz
Input Common-Mode Rejection (CMR)2
80
dB typ
Power Supply Rejection (PSR)2
90
dB typ
HIGH LEVEL ANALOG INPUT CHANNEL (AIN3)
AIN3 is with respect to HICOM
AIN3 Voltage Range
+10
V max
−10
V min
Normal Mode 50 Hz Rejection
78
dB typ
For filter notches of 10 Hz, 25 Hz, 50 Hz; ±0.02 × fNOTCH
Normal Mode 60 Hz Rejection
78
dB typ
For filter notches of 10 Hz, 20 Hz, 60 Hz; ±0.02 × fNOTCH
AIN3 Input Sampling Rate, fS
Gain × fCLKIN/64
Hz nom
For gains of 1 to 4
fCLKIN/8
Hz nom
For gains of 8 to 128
AIN3 Input Impedance2
27
kΩ min
Typically 30 kΩ ± 10%; typical resistor
Tempco is −30 ppm/°C
AIN3 Sampling Capacitance2
10
pF max
VBIAS Input Range
0 V/AVDD
V min/max
Typically REFIN(+) = 2.5 V
LOGIC INPUTS
Input Current
All Inputs Except MCLK IN
±1
μA max
Typically ±20 nA
MCLK
±10
μA max
Typically ±2 m A
All Inputs Except SCLK and MCLK IN
VINL, Input Low Voltage
0.8
V max
DVDD = 5 V
0.4
V max
DVDD = 3 V
VINH, Input High Voltage
2.0
V max
DVDD = 3 V and 5 V
SCLK Only (Schmitt Triggered Input)
DVDD = 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)
DVDD = 3 V nominal
VT+
1/2.5
V min/V max
VT−
0.4/1.1
V min/V max
VT+ − VT−
0.375/0.8
V min /V max


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